A kind of polyphenylene sulfide coil coating
Technical field
The present invention relates to a kind of polyphenylene sulfide coil coating, be particularly suited for metal coiled material, such as coil or the roller of volume aluminum
It is coated with application.
Background technology
Common coiled material kind has coil and volume aluminum, and the coating being applied to coiled material surface is referred to as coil coating.According to coating
The different coil coatings of position are divided into priming paint, finish paint and back of the body paint.Priming lacquer of coiled material is coated in bottom sheet metal face-coating, mainly
Kind has epoxy, the big kind of polyurethane two;Back of the body paint is coated in the sheet metal back side, and principal item has epoxy and polyester two kinds;Face
Paint has polyester finish coat, polyurethane finish, polyethylene base class finish paint, fluorine carbon finishing paint, silicon modified polyesters finish paint etc..But, high rotten
Erosion property environment, such as: Pickling-shop, electroplating workshop, paper machine room, process hides workshop, dyehouse and ceramic sintering workshop etc., by
In circumstance complication, corrosive substance kind is the most, and current coil coating kind is all not suitable for life-time service.Relevant polyphenylene sulfide
Relatively early, after the Shi Ji U.S., Japan, Germany, the 4th realizes PPS resin industrialization in research China starting of ether (PPS) resin
Country, therefore, domestic PPS resin supply abundance, price is about in coil coating the polyvinylidene fluoride used
(PVDF) the 50% of resin.PPS resin molecular structure is fairly simple, and molecular backbone has phenyl ring (-C6H4-) and S atom alternately row
Row, wherein benzene ring structure imparting PPS resin is with rigidity characteris, and thioether bond (-S-) is PPS resin offer compliance.This solely
Special structure becomes the resin that the coating used under the extreme conditions such as high temperature, high humidity, deep-etching and intense radiation is first-selected.Separately
Outward, owing to PPS resin is relatively strong with the caking property of metal, can be applied directly on metal.But, the shortcoming that PPS resin is maximum
Being that strand rigidity is excessive owing to there is substantial amounts of phenyl ring on its main chain, fragility is big, and toughness is low, affects it in coil coating
Application.
Summary of the invention
It is an object of the invention to: provide a kind of polyphenylene sulfide coil coating, this coating overcomes lacking of polyphenylene sulfide
Point so that it is advantage gives full play to, thus become the coil coating being particularly suitable for using at highly corrosive environments.
The technical scheme realizing the object of the invention is: a kind of polyphenylene sulfide coil coating, it is characterised in that by following weight
Each component of part is constituted: 9~30 parts of polyphenylene sulfides, 9~30 parts of split resins, 2~6 parts of firming agent, 10~19 parts heat-resisting
Pigment, 45~57 parts of mixed solvents, 0.5~1.5 part of auxiliary agent, above-mentioned each component sum is 100 weight portions;
Described polyphenylene sulfide is coating level, and it is 22600 that gel chromatography records weight average molecular weight, particle diameter≤1250
Mesh, particle diameter is normal distribution, or is polyphenylene sulfide oligomer, fusing point 160 DEG C;
Described split resin is polyphenylene oxide, polyether-ether-ketone, politef, thermoplastic acrylic resin, poly-inclined difluoro second
One or more in alkene;
Described firming agent is full methyl-etherified amino resins, or closes hexamethylene diisocyanate trimer, or heat
Curable type acrylic resin and full methyl-etherified amino resins, or with close the mixture of hexamethylene diisocyanate trimer,
The two mass ratio is 1~2:1.
In above-mentioned polyphenylene sulfide coil coating, the thermoplastic acrylic resin as split resin is polymethacrylic acid
Thermoplastic acrylic resin, its composition is methyl methacrylate and ethyl acrylate, and the mass ratio of two kinds of monomers is 6:4,
Weight average molecular weight is 50000, and vitrification point is 50 DEG C.
In above-mentioned polyphenylene sulfide coil coating, described heat resistant type pigment is rutile titanium dioxide, iron oxide yellow, ferrum oxide
One or more in black, iron oxide brown, iron oxide red, transparent ferric oxide, cobalt blue, cobalt green, aluminium powder, carbon black.
In above-mentioned polyphenylene sulfide coil coating, described mixed solvent is in aromatic hydrocarbons, esters, ethers, alcohols, ketones solvent
The mixture of several compositions.
In above-mentioned polyphenylene sulfide coil coating, described mixed solvent is S-100, butyl glycol ether, PMA, butyl acetate, two
The mixture of toluene, S-100: butyl glycol ether: PMA: butyl acetate: dimethylbenzene=30:20:25:15:10.
In above-mentioned polyphenylene sulfide coil coating, described auxiliary agent is the one in wetting agent, dispersant, catalyst, levelling agent
Or it is several.
The solution have the advantages that: the polyphenylene sulfide coil coating of technical solution of the present invention have an advantage that 1. by
In have selected appropriate and suitable split resin and suitable polyphenylene sulfide blending, the compatibility therebetween is good, therefore, when
Polyphenylene sulfide coil coating is when metal substrate, and split resin forms Polymer Alloy Membrane with polyphenylene sulfide, not only remains
The advantage that polyphenylene sulfide is intrinsic, also overcomes the shortcoming that polyphenylene sulfide bond strength is relatively low and fragility is big;It addition, it is poly-
Diphenyl sulfide resin is easy to get and its price is less than the PVDF resin used in current coil coating, and therefore, split resin also can be suitable
Reduce product price;2. in coil coating, allocated a certain proportion of pigment into, make paint film keep closing while having covering power
The continuous phase of gold film, in this manner it is ensured that the coating formed has good mechanical performance, acid and alkali resistance performance;3. it is coated with at coiled material
In material, add certain proportion firming agent, utilize the autohemagglutination of firming agent, or by adding a certain proportion of thermal-curable acrylic tree
Fat reacts with firming agent, improves hardness of paint film and scratch resistance, is more suitable for coiled material industry processing request, such as, colored steel industry
Pressure watt processing request.Further, since polyphenylene sulfide is crystalline polymer, degree of crystallinity is up to 70%, and crystallization temperature is about
It it is 135 DEG C.This kind of crystalline polymer generally in cooling procedure along with rate of cooling difference and degree of crystallinity is different, cause paint film
Gloss difference, and by adding firming agent, curing system can exist as crystallization nucleus, thus ensure the degree of crystallinity one of paint film
Cause property, it is ensured that coating gloss stability.Test proves, with the polyphenylene sulfide coil coating of the present invention as coiled material finishing paint,
Its every excellent combination property: T is curved: 1T;Resistance to MEK:> 100 times;Pencil hardness (scratches): 3H;Acid resistance (10%HCl, body
Long-pending): 48hr is unchanged;Alkali resistance (10%NaOH, quality): 48hr is unchanged;Resistance to boiling water: 96hr is unchanged.In a word, the present invention
Technical scheme utilizes the weather resistance that polyphenylene sulfide is good, excellent thermostability, corrosion resistance and preferable metal adhesion
Etc. characteristic, solve its bond strength is relatively low and fragility is big shortcoming and by adding heat resistant paint by split resin, formed
Possess the coating having the characteristics such as preferable weatherability, heatproof moisture-proof, chemicals-resistant corrosion, meet that some chemical attacks are relatively strong, high temperature,
The requirement to colored steel of the environment such as high humidity, has started precedent polyphenylene sulfide being applied to coil coating industry.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further, but is not limited to this.
Embodiment raw materials is unless otherwise indicated commercially available industrial goods, can be buied by commercial channel, wherein:
1. polyphenylene sulfide is Sichuan get Yang chemical company product, wherein, coating level PPS resin, and gel chromatography is surveyed
Obtaining weight average molecular weight is 22600, and particle diameter≤1250 mesh, particle diameter is normal distribution;The fusing point of oligomer PPS 160 DEG C.
2. plastic propene's acid resin B-44 is rom Haars Co., Ltd of the U.S., the thermoplastic acrylic of this polymethacrylic acid
Resin, its composition is methyl methacrylate and ethyl acrylate, and the ratio of two kinds of monomers is about 6:4, and weight average molecular weight is
50000, vitrification point is 50 DEG C;
3. firming agent full methyl-etherified amino resins is the product R747 of Ineos company of Britain;Blocked isocyanate is Bayer
Product B L7982 of company, it is to close hexamethylene diisocyanate trimer;Thermosetting acrylic resin is that Holland DSM is public
Products C R204 of department;
Polyphenylene sulfide coil coating of the present invention is made up of each component of following weight parts: 9~30 parts of polyphenylene sulfides, and 9
~30 parts of split resins, 2~6 parts of firming agent, 10~19 parts of heat resistant paints, 45~57 parts of mixed solvents, 0.5~1.5 part of auxiliary agent,
Above-mentioned each component sum is 100 weight portions.
Embodiment 1 prepares polyphenylene sulfide coil coating 1
1, formula is shown in Table 1.
Table 1
2, preparation method
1. each amounts of components listed by table 1 prepares raw material;
2. take from the mixed solvent that 1. step prepares 18 parts, split resinous thermoplastic's acrylic resin 12 parts be added to reaction
In Ping, starting stirring, be heated to 140 DEG C of resins and dissolve, after being incubated 3 hours, cooling obtains 30 parts of split resinous thermoplastic third
Olefin(e) acid resin solution, saves backup;
3., in 30 parts of thermoplastic acrylic resin solution that 2. step obtains, add dispersant Lu Borun 32500 and join
Side measures the mixed solvent of 50% and stirs, and is subsequently adding split resin politef, polyphenylene sulfide and heat-resisting face
Material, mix homogeneously, it is ground to fineness≤20 μm with sand mill and prepares mill base;
4., in the mill base that 3. step prepares, after addition firming agent, residue auxiliary agent, residue mixed solvent stir, adjust
Joint is 80~120 seconds to being coated with-4 glasss of viscosity, then filters and packages with 200 mesh filter screens and be polyphenylene sulfide coil coating 1.
Embodiment 2 prepares polyphenylene sulfide coil coating 2
1, formula is shown in Table 2.
Table 2
2, preparation method
1. the consumption of each component as described in table 2 prepares raw material;
2. from the mixed solvent that 1. step prepares, take 18 parts and split resinous thermoplastic's acrylic resin 12 parts is added to instead
Answering in bottle, start stirring, be heated to 140 DEG C of resins and dissolve, after being incubated 3 hours, cooling obtains 30 parts of split resinous thermoplastic
Acrylic resin soln, saves backup;
3. 13 parts of aluminum paste CR-21GM soak 4h with 13 parts of butyl acetates, save backup;
4. take 25 parts of split resinous thermoplastic's acrylic resin solns that 2. step obtains, add dispersant road wherein and win
Profit 32500 stirs, and is subsequently adding split resin polyvinylidene fluoride, polyphenylene sulfide, mix homogeneously, and high speed dispersion is extremely
It is standby that fineness≤20 μm prepares slip;
5., in the slip that 4. step prepares, firming agent R747 full methyl-etherified amino resins and CR204 thermosetting third are added
Olefin(e) acid resin, BL7982 (Bayer), residue split resinous thermoplastic's acrylic resin soln, residue mixed solvent stir
After, under stirring add diluted BYK-070 defoamer, organotin, King1419, EFKA-3777, stir,
Being added thereto after aluminum paste stirring at low speed 30min step 3. soaked again and stir, regulation to being coated with-4 glasss of viscosity is
80~120 seconds, then filter and package with 80 mesh filter screens and be polyphenylene sulfide coil coating 2.
Embodiment 3 prepares polyphenylene sulfide coil coating 3
1, formula is shown in Table 3.
Table 3
2, preparation method
1. the consumption of each component as described in table 3 prepares raw material;
2. take from the mixed solvent that 1. step prepares 18 parts, split resinous thermoplastic's acrylic resin 12 parts be added to reaction
In Ping, starting stirring, be heated to 140 DEG C of resins and dissolve, after being incubated 3 hours, cooling obtains 30 parts of split resinous thermoplastic third
Olefin(e) acid resin solution, saves backup;
3., in 30 parts of split resinous thermoplastic's acrylic resin solns that 2. step obtains, dispersant Lu Borun is added
32500 and the mixed solvent of formula ratio 50% stirring, it is subsequently adding split resin polyphenylene sulfide and heat resistant paint,
Mix homogeneously, is ground to fineness≤20 μm with sand mill and prepares mill base;
4., in the mill base that 3. step prepares, after addition firming agent, residue auxiliary agent, residue mixed solvent stir, adjust
Joint is 80~120 seconds to being coated with-4 glasss of viscosity, then filters and packages with 200 mesh filter screens and be polyphenylene sulfide coil coating 3.
Embodiment 4 prepares polyphenylene sulfide coil coating 4
1, formula is shown in Table 4.
Table 4
2, preparation method
1. the consumption of each component as described in table 4 prepares raw material;
2. take from the mixed solvent that 1. step prepares 18 parts, split resinous thermoplastic's acrylic resin 12 parts be added to reaction
In Ping, starting stirring, be heated to 140 DEG C of resins and dissolve, after being incubated 3 hours, cooling obtains 30 parts of split resinous thermoplastic third
Olefin(e) acid resin solution, saves backup;
3., in 30 parts of split resinous thermoplastic's acrylic resin solns that 2. step obtains, dispersant Lu Borun is added
32500 and the mixed solvent of formula ratio 50% stirring, it is subsequently adding split resin polyphenylene sulfide, polyphenylene oxide, poly-
Phenylene ether ketone and heat resistant paint, mix homogeneously, it is ground to fineness≤20 μm with sand mill and prepares mill base;
4., in the mill base that 3. step prepares, after addition firming agent, residue auxiliary agent, residue mixed solvent stir, adjust
Joint is 80~120 seconds to being coated with-4 glasss of viscosity, then filters and packages with 200 mesh filter screens and be polyphenylene sulfide coil coating 4.
Embodiment 5 prepares polyphenylene sulfide coil coating 5
1, formula is shown in Table 5.
Table 5
2, preparation method
1. the consumption of each component as described in table 5 prepares raw material;
2. take from the mixed solvent that 1. step prepares 18 parts, split resinous thermoplastic's acrylic resin 12 parts be added to reaction
In Ping, starting stirring, be heated to 140 DEG C of resins and dissolve, after being incubated 3 hours, cooling obtains 30 parts of split resinous thermoplastic third
Olefin(e) acid resin solution, saves backup;
3., in 30 parts of split resinous thermoplastic's acrylic resin solns that 2. step obtains, dispersant Lu Borun is added
32500 and the mixed solvent of formula ratio 50% stirring, it is subsequently adding split resin polyvinylidene fluoride, polyphenylene sulfide resin
Fat and heat resistant paint, mix homogeneously, it is ground to fineness≤20 μm with sand mill and prepares mill base;
4., in the mill base that 3. step prepares, after addition firming agent, residue auxiliary agent, residue mixed solvent stir, adjust
Joint is 80~120 seconds to being coated with-4 glasss of viscosity, then filters and packages with 200 mesh filter screens and be polyphenylene sulfide coil coating 5.
Detection polyphenylene sulfide coil coating performance
1, model is made
Select through defat, passivated hot-dip galvanizing sheet steel, polyphenylene sulfide above-described embodiment prepared with RDS32 rod
Coil coating 1~4 scraper plate baking respectively, baking temperature is plate temperature 280 DEG C (30~45 seconds);Select through defat, passivated
Hot-dip galvanizing sheet steel, the polyphenylene sulfide coil coating scraper plate baking prepared by above-described embodiment 5 with RDS32 rod, baking temperature is
Plate temperature 241 DEG C (30~45 seconds), preserves to be detected.
2, detection method
Table 6
Detection project |
Detection method |
Outward appearance |
Visually |
Thickness |
Magnetic thickness tester |
T is curved |
GB/13448-2006,7, bend test |
Resistance to MEK, secondary (coming and going) |
GB/13448-2006,10, organic solvent-resistant is tested |
Pencil hardness, scratches |
GB/13448-2006,9, pencil hardness test |
Acid resistance (10 volume %HCl) |
GB/13448-2006,16, pH resistance test |
Alkali resistance (10wt%NaOH) |
GB/13448-2006,16, pH resistance test |
Resistance to boiling water |
GB/13448-2006,15, boiling water test |
3, testing result is shown in Table 7.
Table 7
By table 7 testing result it can be seen that the coating traditional performance that coating of the present invention (1~5) obtains meets coiled material painting
The requirement of layer, at the aspect of performance such as acid-proof alkaline, water boiling resistance, in GB GB/T13448-2006, the soda acid of acid and alkali-resistance experiment is dense
Degree is 5 volume %, and the conventional coil coating variety acid and alkali-resistance time is usually 24 hours with client's agreement, and the resistance to boiling water time is general about
Surely it it is 2 hours, it is seen that product of the present invention has preferably performance in terms of acid and alkali-resistance, resistance to boiling water.