CN106318172A - Solvent-borne coating and main agents, hardening agent and preparation method and coating method of coating - Google Patents
Solvent-borne coating and main agents, hardening agent and preparation method and coating method of coating Download PDFInfo
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- CN106318172A CN106318172A CN201510399830.0A CN201510399830A CN106318172A CN 106318172 A CN106318172 A CN 106318172A CN 201510399830 A CN201510399830 A CN 201510399830A CN 106318172 A CN106318172 A CN 106318172A
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Abstract
The invention discloses a solvent-borne coating and main agents, a hardening agent and a preparation method and a coating method of the coating. The solvent-borne coating comprises 20-60 parts by weight of a solid component and 40-80 parts by weight of an organic solvent, wherein the organic solvent comprises 0-35 parts by weight of a low hydrophilic solvent group and 65-100 parts by weight of a highly hydrophilic solvent group, the low hydrophilic solvent group is at least one group of organic solvent groups with water solubility lower than 5 g/100 mL, and the highly hydrophilic solvent group is at least one group of organic solvent groups with water solubility higher than 8 g/100 mL. The hydrophilicity of the volatile organic solvent is improved without changing the physical and chemical properties of the coating, so that when the surface of a substrate is coated, the volatile organic gas can be effectively adsorbed by water, thereby reducing the emission of the volatile organic gas.
Description
Technical field
The present invention is related to a kind of solvent based coating, especially with regard to a kind of solvent based coating with high-hydrophilic solvent, to reduce the discharge of volatile organic gas, reaches the requirement of environmental protection.
Background technology
Owing to the height of industry is grown up; for avoiding the reproduction of conventional oil crisis, and the environmental requirement of increasingly stringent can be met, for the solvent used with coating related industry; must try to reduce or substitute it use, with towards the coating direction development manufacturing low public hazards, resource-saving and province's energy.
In existing coating type, it is roughly divided into solvent based coating and water paint.The solvent based coating of existing use contains substantial amounts of VOC (Volatile
Organic Compound, VOC) so that its baking temperature when application is relatively low, and the time is the shortest, and production capacity improves relatively, but it is disadvantageously, easily cause a large amount of VOC volatilization gas during application, causes the pollution of environment and air.In recent years, owing to the mankind are to environmental protection and the attention of the energy, the content of VOC in coating is strictly controlled by countries in the world in succession, the research promoting coating is transferred to water paint gradually by usual solvent based coating, compared with solvent based coating, water paint has the advantage relatively low without VOC or VOC content, and environmental pollution is low.
But, although water paint has relatively low without VOC or VOC content and that environmental pollution is a low advantage, but when using it to carry out painting operation, then have a following point:
1. owing to water paint is with water as solvent, during application, aqueous vapor will be evaporated on coating equipment and roasting plant, for asking the durable of equipment and avoiding because of the problem of oxide contaminant produced by metal erosion, coating equipment and roasting plant need to be based on stainless steels, and this measure certainly will cause application dealer significantly Capital expenditure.
2. though the volatility of water paint is low, but need longer baking time and cause the decline of production capacity, simultaneously for improving coating surface quality (as coating hangs down flow problem), paint heating and part pre-heating system need to be installed again additional in application factory, certainly will will also result in application dealer significantly Capital expenditure.
Edge this, general application dealer, in addition to considering the high cost spent needed for water paint application, also can consider the air thing dye problem caused with solvent based coating application.
With regard to current plastics spare part (such as acrylonitrile-butadiene-styrene copolymer (Acrylonitrile-Butadine-Styrene, ABS), nylon (Nylon) and polypropylene (Polypropylene, PP) for external coating etc.), it is large for still using solvent based coating to carry out application, main reason is that, at plastics spare part in painting operation, because adopting low-temperature bake processing procedure, spraying can be exempted and roasting plant is caused equipment corrosion by aqueous vapor Influence of Evaporation, therefore equipment is not required to high stainless steel manufacture, the most therefore cost reduces, but VOC volatilization gas emission problem, the effective prevention and controls being currently known is too high with running cost because of setup cost, it is not that general application dealer uses, and take directly to discharge.
Therefore, in order to promote the competitiveness of application dealer, in the case of reducing cost payout and reducing VOC volatilization gas, this invention address that the research and development of high-hydrophilic solvent based coating, to solve foregoing problems.
Summary of the invention
Present invention is primarily targeted at, it is provided that a kind of solvent based coating, under conditions of the physical property not changing coating and the property changed, improve the hydrophilic of volatile organic solvent, utilize the discharge of the absorption minimizing volatile organic gas further of water.
In order to achieve the above object, the invention provides a kind of solvent based coating, include:
The solid content of 20 to 60 weight portions；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
Further, wherein high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
Further, wherein this solid content includes acryl polyol resin and polyisocyanate.
The present invention also provides for a kind of solvent based coating, includes:
The solid content of 20 to 60 weight portions, this solid content includes acryl polyol resin and polyisocyanate；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
The present invention also provides for a kind of host, includes:
The solid content of 20 to 60 weight portions, this solid content system is an acryl polyol resin；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
Further, wherein this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
The present invention also provides for a kind of sclerosing agent, includes:
The solid content of 20 to 60 weight portions, this solid content is polyisocyanate；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
Further, wherein this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
The present invention also provides for the manufacture method of a kind of solvent based coating, comprises the following steps:
Step A a: host is provided, this host is an acryl polyol resin and the intermixture of an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；
Step B a: sclerosing agent is provided, this sclerosing agent is the intermixture of polyisocyanate and an organic solvent, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；And
Step C: this host is mixed with this sclerosing agent, stirs, filtered, to obtain this solvent based coating.
Further, further include:
Step D: provide a diluent, this diluent is an organic solvent, and this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；And
Step E: this diluent is mixed with this solvent based coating, stirred, to obtain the solvent based coating after dilution.
Further, the solvent based coating after wherein diluting includes:
The solid content of 20 to 60 weight portions；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
The present invention also provides for the coating process of a kind of solvent based coating, comprises the following steps:
Step A a: solvent based coating is coated on a base material, and form a coating, this base material is plastics material, timber or stone material；
Step B: in coating process, with the volatile organic gas of water absorbing organic solvent；And
Step C: toast this coating with the temperature less than 80oC, makes this coating form a tunicle on this base material.
The method have the characteristics that, with under conditions of the physical property not changing coating and the property changed, improve the hydrophilic of volatile organic solvent, such as reduce the usage amount of low hydrophilic solvent group, and improve the usage amount of high-hydrophilic solvent group so that when carrying out substrate surface application, available water carrys out active adsorption volatile organic gas, to reduce its discharge, and can be in the standard of VOC emission.
Accompanying drawing explanation
Fig. 1 is the manufacture method flow chart of the solvent based coating of one embodiment of the invention；
Fig. 2 is the manufacture method flow chart of the solvent based coating of another embodiment of the present invention；
Fig. 3 is the coating process flow chart of the solvent based coating of one embodiment of the invention；And
Fig. 4 is the coating process flow chart of the solvent based coating of another embodiment of the present invention.
In figure, the manufacture method of 1 solvent based coating；
The manufacture method of 2 solvent based coatings；
The coating process of 3 solvent based coatings；
The coating process of 4 solvent based coatings；
S101 ~ S105 step；
S201 ~ S204 step；
S301 ~ S303 step；
S401 ~ S405 step.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
According to one embodiment of the invention, solvent based coating of the present invention, mainly include solid content and the organic solvent of 40 to 80 weight portions of 20 to 60 weight portions.Wherein this solid content can include acryl polyol resin and polyisocyanate, this acryl polyol resin is the main solid content in a host of this solvent based coating, this polyisocyanate is the main solid content in a sclerosing agent of this solvent based coating, therefore, this solvent based coating is two liquid type solvent based coatings.In the present invention, the organic solvent that described solvent based coating is used includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.This low hydrophilic solvent mass selection is from toluene (Toluene), dimethylbenzene (Xylene), butyl acetate (Butyl Acetate, BAC), espeleton (Methyl
Isobutyl Ketone, MIBK), in the group that constituted of butyl acetate (Isobutyl Acetate, iBAC) and hexahydrotoluene (methylcyclohexane, MCH) at least one；This high-hydrophilic solvent mass selection is from ethyl acetate (Ethyl
Acetate, EAC), propylene glycol monomethyl ether (Propylene
Glycol Monomethyl Ether, PM), propylene glycol methyl ether acetate (Propylene Glycol Mono-methyl Ether Acetate, PMA) and in the group that constituted of dipropylene glycol methyl ether (Dipropylene Glycol Methyl Ether, DPM) at least one.
Wherein, the ethyl acetate (Ethyl Acetate, EAC) in this high-hydrophilic solvent group is 8.6g/100ml (water) to the dissolubility of water；Propylene glycol monomethyl ether (Propylene in this high-hydrophilic solvent group
Glycol Monomethyl Ether, PM) to the dissolubility of water for be entirely dissolved in water in the environment of 25oC, i.e. the dissolubility to water is 100g/100ml (water)；Propylene glycol methyl ether acetate (Propylene in this high-hydrophilic solvent group
Glycol Mono-methyl Ether Acetate, PMA) be 18.5% to the dissolubility of water, i.e. the dissolubility to water is 18.5g/100ml (water)；And the dipropylene glycol methyl ether (Dipropylene Glycol Methyl Ether, DPM) in this high-hydrophilic solvent group is the most molten to the dissolubility of water, i.e. the dissolubility to water is 100g/100ml (water).
In another embodiment of the invention, the host solid content of described solvent based coating more can comprise a toner, and this toner comprises the carbon black of black, white titanium dioxide and the organic or inorganic pigment such as red, yellow, blue, green.
Fig. 1 is the manufacture method flow chart of the solvent based coating of one embodiment of the invention.According to above-mentioned solvent based coating, the manufacture method 1 of solvent based coating of the present invention, comprise the following steps:
Step A (i.e. step S101 in Fig. 1) a: host is provided.This host comprises solid content and the organic solvent of 40 to 80 weight portions of 20 to 60 weight portions, this solid content is an acryl polyol resin, this organic solvent includes the low hydrophilic solvent group of 0 ~ 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.Wherein this low hydrophilic solvent group and the group of high-hydrophilic solvent group are with above-mentioned, do not repeat them here.
Step B (i.e. step S102 in Fig. 1) a: sclerosing agent is provided.This sclerosing agent is a solid content and the intermixture of an organic solvent, and this organic solvent is selected from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
In detail, sclerosing agent of the present invention includes solid content and the organic solvent of 40 to 80 weight portions of 20 to 60 weight portions, and this organic solvent includes the low hydrophilic solvent group of 0 ~ 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions.This sclerosing agent is polyisocyanate, and this organic solvent is selected from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.In the present invention, the high-hydrophilic solvent mass selection that described sclerosing agent is used is from ethyl acetate (Ethyl
Acetate, EAC), propylene glycol monomethyl ether (Propylene
Glycol Monomethyl Ether, PM), propylene glycol methyl ether acetate (Propylene Glycol Mono-methyl Ether Acetate, PMA) and in the group that constituted of dipropylene glycol methyl ether (Dipropylene Glycol Methyl Ether, DPM) at least one.
Step C (i.e. step S103 in Fig. 1): this host is mixed with this sclerosing agent, stirs, filtered, to obtain this solvent based coating.
In this manufacture method, more can include on demand:
Step D (i.e. step S104 in Fig. 1) a: diluent is provided.This diluent is an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 ~ 100 weight portions, this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one (detailed organic solvent group, with aforementioned, does not repeats them here)；And
Step E (i.e. step S105 in Fig. 1): this diluent is mixed with this solvent based coating, stirred, to obtain the solvent based coating after dilution.The solvent based coating of the present invention in application time, the visually difference of the base material of its application, and add this diluent on demand, in order to dilute this solvent based coating, and then adjust the viscosity of this solvent based coating.Wherein, this base material includes plastics material, timber or stone material etc..
Fig. 2 is the manufacture method flow chart of the solvent based coating of another embodiment of the present invention.The manufacture method 2 of another making solvent based coating of the present invention, comprises the following steps:
Step A (i.e. step S201 in Fig. 2) a: host is provided.This host is an acryl polyol resin and the intermixture of an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.Wherein this low hydrophilic solvent group and the group of high-hydrophilic solvent group are with above-mentioned, do not repeat them here.
Step B (i.e. step S202 in Fig. 2) a: sclerosing agent is provided.This sclerosing agent is a solid content and the intermixture of an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.In detail, sclerosing agent of the present invention includes solid content and the organic solvent of 40 to 80 weight portions of 20 to 60 weight portions.This sclerosing agent is polyisocyanate.In the present invention, the high-hydrophilic solvent mass selection that described sclerosing agent is used is from ethyl acetate (Ethyl
Acetate, EAC), propylene glycol monomethyl ether (Propylene
Glycol Monomethyl Ether, PM), propylene glycol methyl ether acetate (Propylene Glycol Mono-methyl Ether Acetate, PMA) and in the group that constituted of dipropylene glycol methyl ether (Dipropylene Glycol Methyl Ether, DPM) at least one.
Step C (i.e. step S203 in Fig. 2) a: diluent is provided.This diluent is an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one (detailed organic solvent group, with aforementioned, does not repeats them here)
Step D (i.e. step S204 in Fig. 2): this host, this sclerosing agent are mixed with this diluent, stir, filtered, to obtain the solvent based coating after dilution.
Therefore, according to the manufacture method 2 of above-mentioned solvent based coating, directly this host, this sclerosing agent can be mixed with this diluent, stir, filter on demand, directly to obtain the solvent based coating after dilution.
Fig. 3 is the coating process flow chart of the solvent based coating of one embodiment of the invention.According to above-mentioned solvent based coating, the coating process 3 of solvent based coating of the present invention, comprise the following steps:
Step A (i.e. step S301 in Fig. 3): this solvent based coating is coated on a base material and forms a coating.Wherein, this coating uses and scrapes rod coating (bar
Coating), ramp type coating (slide coating), curtain streaming coating (curtain coating) and atomizing coating (spray
Coating) among at least one, and this base material includes that plastics material (is selected from acrylonitrile-butadiene-styrene copolymer (Acrylonitrile-Butadine-Styrene, ABS), among nylon (Nylon) and polypropylene (Polypropylene, PP) at least one), timber or stone material etc..
Step B (i.e. step S302 in Fig. 3): in coating process, with the volatile organic gas of water absorbing organic solvent.In detail, owing to this solvent based coating including organic solvent (i.e. volatile organic solvent), therefore in the coating process of this solvent based coating, volatile organic solvent can produce volatile organic gas, for reducing the discharge of volatile organic gas, air extractor is installed additional in the working environment of solvent based coating application, this air extractor is made to guide this volatile organic gas by a water curtain, now, water can adsorb this volatile organic gas, the particularly volatile organic gas (volatile organic solvent produced by high-hydrophilic solvent group the most of the present invention) of the organic solvent that the dissolubility in water is higher.Edge this, the high-hydrophilic solvent group that adoption rate of the present invention is higher, make solvent based coating produced volatile organic gas in coating process, major part all can be adsorbed (volatile organic gas that particularly high-hydrophilic solvent group is volatilized) by set water curtain, and volatile organic gas aerial discharge capacity is greatly reduced.
Step C (i.e. step S303 in Fig. 3): to this coating with less than 80oThe temperature of C is toasted, and makes this coating form a tunicle on this base material.In detail, solvent based coating of the present invention is relatively applicable to the painting operation of plastics material, timber or stone material etc., because the temperature toasting this coating must be less than 80oC, and the intermolecular functional group of this solvent based coating can be made to crosslink reaction and become this tunicle, in order to decorate, to protect this base material.
Fig. 4 is the coating process flow chart of the solvent based coating of another embodiment of the present invention.According to above-mentioned solvent based coating, the coating process 4 of solvent based coating of the present invention, comprise the following steps:
Step A (i.e. step S401 in Fig. 4): this solvent based coating is coated on a base material and forms a priming coat.In detail, main being coated on a base material by a priming paint (as shown in table 1 below) forms a priming coat, and this coating uses scrapes rod coating (bar coating), ramp type coating (slide coating), curtain streaming coating (curtain
Coating) and atomizing coating (spray coating) among at least one, and this base material includes that plastics material (is selected from acrylonitrile-butadiene-styrene copolymer (Acrylonitrile-Butadine-Styrene, ABS), among nylon (Nylon) and polypropylene (Polypropylene, PP) at least one), timber or stone material etc..
Step B (i.e. step S402 in Fig. 4): subsequent steps S401, in the coating process of this priming paint, with the volatile organic gas of water absorbing organic solvent.In detail, owing to this priming paint including organic solvent (i.e. volatile organic solvent), therefore in the coating process of this priming paint, volatile organic solvent can produce volatile organic gas, for reducing the discharge of volatile organic gas, air extractor is installed additional in the working environment of primer painting, this air extractor is made to guide this volatile organic gas by a water curtain, now, water can adsorb this volatile organic gas, the particularly volatile organic gas (volatile organic solvent produced by high-hydrophilic solvent group the most of the present invention) of the organic solvent that the dissolubility in water is higher.Edge this, the high-hydrophilic solvent group that adoption rate of the present invention is higher, make priming paint produced volatile organic gas in coating process, major part all can be adsorbed (volatile organic gas that particularly high-hydrophilic solvent group is volatilized) by set water curtain, and volatile organic gas aerial discharge capacity is greatly reduced.
Step C (i.e. step S403 in Fig. 4): this solvent based coating is coated on this priming coat and forms a finishing coat.In detail, being mainly coated on this priming coat by a finish paint (as shown in table 2 below or table 3) and form a finishing coat, this coating uses and scrapes rod coating (bar
Coating), ramp type coating (slide coating), curtain streaming coating (curtain coating) and atomizing coating (spray
Coating) at least one.In another embodiment, typically after being coated with this priming coat, first stand 1 to 5 minute (comprising time of delivery), be coated this finishing coat afterwards.
Step D (i.e. step S404 in Fig. 4): subsequent steps S403, in the coating process of this finish paint, with the volatile organic gas of water absorbing organic solvent.In detail, owing to this finish paint including organic solvent (i.e. volatile organic solvent), therefore in the coating process of this finish paint, volatile organic solvent can produce volatile organic gas, for reducing the discharge of volatile organic gas, air extractor is installed additional in the working environment of finish paint application, this air extractor is made to guide this volatile organic gas by a water curtain, now, water can adsorb this volatile organic gas, the particularly volatile organic gas (volatile organic solvent produced by high-hydrophilic solvent group the most of the present invention) of the organic solvent that the dissolubility in water is higher.Edge this, the high-hydrophilic solvent group that adoption rate of the present invention is higher, make finish paint produced volatile organic gas in coating process, major part all can be adsorbed (volatile organic gas that particularly high-hydrophilic solvent group is volatilized) by set water curtain, and volatile organic gas aerial discharge capacity is greatly reduced.
Step E (i.e. step S405 in Fig. 4): to this priming coat and this finishing coat with less than 80oThe temperature of C is toasted, and makes this priming coat and this finishing coat form a tunicle on this base material.Solvent based coating of the present invention is relatively applicable to the painting operation of plastics material, timber or stone material etc., because the temperature of baking priming coat and this finishing coat must be less than 80oC, and the intermolecular functional group of this solvent based coating can be made to crosslink reaction and become this tunicle, in order to decorate, to protect this base material.
Therefore, solvent based coating of the present invention, with under conditions of the physical property not changing coating and the property changed, improve the hydrophilic of organic solvent, such as, reduce the usage amount of low hydrophilic solvent group, improve the usage amount of high-hydrophilic solvent group, make when carrying out substrate surface application, the volatile organic gas that can be effectively volatilized with water absorption high-hydrophilic solvent group, reduces the discharge capacity of volatile organic gas, and can be in the standard of VOC emission；If during additionally, select the solvent higher to water solubility in high-hydrophilic solvent group, such as propylene glycol monomethyl ether (Propylene
Glycol Monomethyl Ether, PM) or dipropylene glycol methyl ether (Dipropylene Glycol Methyl
Ether, DPM), more can promote the ability of the volatile organic gas that water absorption high-hydrophilic solvent group is volatilized, and more can reduce the discharge capacity of volatile organic gas.
Table 1 is each mixed proportion forming part of the solvent based coating of an experimental example of the present invention.Refer to table 1, it is provided that solvent based coating of the present invention is as each mixed proportion forming part of priming paint, and can get host, sclerosing agent according to the use weight of each composition part is 10:1:5 with the proportion of composing of diluent.The organic solvent that described solvent based coating is used includes the high-hydrophilic solvent group of about 83.87% weight portion.
Table 1
Table 2 is each mixed proportion forming part of the solvent based coating of another experimental example of the present invention.Refer to table 2 again, thering is provided solvent based coating of the present invention as each mixed proportion forming part of finish paint (being i.e. commonly called as polishes or polish lacquer), can get host, sclerosing agent according to the use weight of each composition part is 3:1:1.5 with the proportion of composing of each composition part of diluent.The organic solvent that described solvent based coating is used includes the high-hydrophilic solvent group of 97.80% weight portion.
Table 2
The solvent based coating (i.e. priming paint) of table 1 gained is sprayed on plastics material with air gun, after about 2 minutes (time of delivery), again by the solvent based coating (i.e. finish paint) of table 2 gained, it is sprayed on priming paint with air gun, and carry out the baking of 30 minutes, baking temperature, at 60 DEG C, ultimately forms tunicle.After the application completing plastics material, carrying out physical property measurement, result is as follows:
Thickness: 10 ~ 15 μm
Tunicle and the tack of plastics material: 100/100
By film hardness: H
Tunicle glossiness: 90
Tunicle endurance (is statically placed in 0.1N sulphuric acid, 0.1N sodium hydroxide, 92 unleaded gases；
Table 3.
Embodiment described above is only the preferred embodiment lifted by absolutely proving the present invention, and protection scope of the present invention is not limited to this.Equivalent that those skilled in the art are made on the basis of the present invention substitute or
Conversion, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (12)
1. a solvent based coating, it is characterised in that include:
The solid content of 20 to 60 weight portions；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
2. solvent based coating as claimed in claim 1, it is characterised in that wherein high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
3. solvent based coating as claimed in claim 1, it is characterised in that wherein this solid content includes acryl polyol resin and polyisocyanate.
4. a solvent based coating, it is characterised in that include:
The solid content of 20 to 60 weight portions, this solid content includes acryl polyol resin and polyisocyanate；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
5. a host, it is characterised in that include:
The solid content of 20 to 60 weight portions, this solid content system is an acryl polyol resin；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
6. host as claimed in claim 5, it is characterised in that wherein this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
7. a sclerosing agent, it is characterised in that include:
The solid content of 20 to 60 weight portions, this solid content is polyisocyanate；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
8. sclerosing agent as claimed in claim 7, it is characterised in that wherein this high-hydrophilic solvent mass selection in the group that ethyl acetate, propylene glycol monomethyl ether, propylene glycol methyl ether acetate and dipropylene glycol methyl ether are constituted at least one.
9. the manufacture method of a solvent based coating, it is characterised in that comprise the following steps:
Step A a: host is provided, this host is an acryl polyol resin and the intermixture of an organic solvent, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；
Step B a: sclerosing agent is provided, this sclerosing agent is the intermixture of polyisocyanate and an organic solvent, this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；And
Step C: this host is mixed with this sclerosing agent, stirs, filtered, to obtain this solvent based coating.
10. the manufacture method of solvent based coating as claimed in claim 9, it is characterised in that further include:
Step D: provide a diluent, this diluent is an organic solvent, and this organic solvent includes the high-hydrophilic solvent group of 65 to 100 weight portions, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one；And
Step E: this diluent is mixed with this solvent based coating, stirred, to obtain the solvent based coating after dilution.
The manufacture method of 11. solvent based coatings as claimed in claim 10, it is characterised in that wherein the solvent based coating after dilution includes:
The solid content of 20 to 60 weight portions；And
The organic solvent of 40 to 80 weight portions, this organic solvent includes the low hydrophilic solvent group of 0 to 35 weight portion and the high-hydrophilic solvent group of 65 to 100 weight portions, this low hydrophilic solvent mass selection is from water solubility is less than in the organic solvent group of 5 grams/100 milliliters at least one, and this high-hydrophilic solvent mass selection is from water solubility is more than in the organic solvent group of 8 grams/100 milliliters at least one.
The coating process of 12. 1 kinds of solvent based coatings as claimed in claim 1, it is characterised in that comprise the following steps:
Step A a: solvent based coating is coated on a base material, and form a coating, this base material is plastics material, timber or stone material；
Step B: in coating process, with the volatile organic gas of water absorbing organic solvent；And
Step C: to this coating with less than 80oThe temperature of C is toasted, and makes this coating form a tunicle on this base material.
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| CN201510399830.0A CN106318172A (en) | 2015-07-09 | 2015-07-09 | Solvent-borne coating and main agents, hardening agent and preparation method and coating method of coating |
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| CN201510399830.0A CN106318172A (en) | 2015-07-09 | 2015-07-09 | Solvent-borne coating and main agents, hardening agent and preparation method and coating method of coating |
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Application publication date: 20170111 |