CN101423584B - Method for preparing acrylic acid emulsion for abrasive belt - Google Patents
Method for preparing acrylic acid emulsion for abrasive belt Download PDFInfo
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- CN101423584B CN101423584B CN2008102368258A CN200810236825A CN101423584B CN 101423584 B CN101423584 B CN 101423584B CN 2008102368258 A CN2008102368258 A CN 2008102368258A CN 200810236825 A CN200810236825 A CN 200810236825A CN 101423584 B CN101423584 B CN 101423584B
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Abstract
The invention provides a method for preparing acrylic based emulsion for an abrasive band. The acrylic based emulsion for the abrasive band comprises polymer monomers in weight percentage: 70 to 80 percent of butyl acrylate, 20 to 30 percent of styrene, 2 to 5 percent of acrylic acid fluorinated butyl ester, 2 to 5 percent of acrylic acid, 2 to 5 percent of emulsifying agent, 0.3 to 0.6 percent of initiating agent, and 0.1 to 0.6 percent of molecular weight regulator. The preparation method of the emulsifying agent is as follows: firstly, the monomers are emulsified into emulsifiable solution; secondly, adding proper amount of deionized water, one third of pre-emulsified solution, 80 percent of the initiating agent and the molecular weight regulator into a reaction kettle to be stirred evenly; thirdly, the residual 20 percent of the initiating agent and two thirds of the pre-emilsified solution are added evenly into the reaction kettle at the temperature of below 80 DEG C; and fourthly, keeping the temperature for 2 hours after material feeding, ammonia is added to adjust pH value to 4, and the material is filtered and discharged to obtain the acrylic based emulsion for the abrasive band. The method adopts a pre-emulsification process, makes the monomers, the emulsifying agent and the initiating agent mixed more evenly, and ensures that the monomers, the emulsifying agent andthe initiating agent maintain stable proportion during reaction, so that the reaction is more stable, and various components have good stability in polymerization reaction. The acrylic based emulsionfor the abrasive band has the advantages of good leather cement compatibility, long preservation time, strong bonding force, high tensile strength, easy post treatment and so on.
Description
Technical field
The present invention relates to the auxiliary chemicals field, specially refer to the preparation method of acrylic acid emulsion for abrasive belt.
Background technology
Present domestic grinding tool, the employed mechanical auxiliary agent of Abrasive Industry are generally acrylic acid emulsion for abrasive belt, it is the former cloth sizing agent of abrasive band production line in large-scale timber enterprise and the machine industry, the used base-material in general production abrasive band is a high-quality industry cotton, and acrylic emulsion is former cloth starching tackiness agent.In the processing requirement of using the abrasive band with acrylic emulsion be, the miscible time of hide glue is long, prevented from caking, and bonding force is strong, and firmness is high.And the product of the manufacturer of domestic production acrylic acid emulsion for abrasive belt, more or less lack have miscible time of hide glue short, easily a little less than caking, the bonding force, defective such as firmness difference.At present domestic some enterprise also uses the K27D product of the German Ba Qifu company of import, this product can prolong the miscible time of some hide glues, solve easily defectives such as caking, but also have bonding force not by force, firmness is relatively poor, cost an arm and a leg, transport problem such as inconvenience.Research and applicable cases from domestic and international ACRYLIC EMULSION tackiness agent, more than two kinds of existing common defects of situation be: the one, the hide glue compatibility time is short to be unfavorable for aftertreatment, bring difficulty to subsequent technique, another is that bonding force is not strong, firmness is relatively poor, and mainly by import, and cost an arm and a leg, transport inconvenience.
Summary of the invention
The object of the present invention is to provide that a kind of hide glue compatibility is good, retention time is long, bonding force is strong, tensile strength is high, be easy to the preparation method of the acrylic acid emulsion for abrasive belt of aftertreatment.This ACRYLIC EMULSION mainly contains vinylformic acid, butyl acrylate, vinylbenzene and fluorobutyl acrylate emulsion copolymerization and forms.
For achieving the above object, technical scheme of the present invention is:
Each compositions in weight percentage of acrylic acid emulsion for abrasive belt is constructed as follows:
Butyl acrylate 70～80%
Vinylbenzene 20～30%
Fluorobutyl acrylate 2～5%
Vinylformic acid 2～5%
Emulsifying agent 2～5%
Initiator 0.3～0.6%
Molecular weight regulator 0.1～0.6%
Wherein: emulsifying agent is a nonionogenic tenside styroyl phenol polyethenoxy ether, and anionic, its proportioning are 1～4: 0.5～2; Initiator is an ammonium persulphate; Molecular weight regulator is dithiocarbonic anhydride and uncle's lauryl mercaptan, and its proportioning is 3～5: 1.
The preparation method's of acrylic acid emulsion for abrasive belt step is:
(1) preparation pre-emulsion, below each compositions in weight percentage:
Emulsifying agent with 2～5%, nonionogenic tenside styroyl phenol polyethenoxy ether and anionic in the emulsifying agent, by 1～4: 0.5～2 carries out proportioning, pour the deionized water for stirring dissolving into, then 70～80% butyl acrylate, 20～30% vinylbenzene, 2～5% fluorobutyl acrylate and 2～5% vinylformic acid are slowly added, fully stir and obtain stable monomer pre-emulsion;
(2) in reactor, add deionized water, the emulsion that the pre-emulsification of 1/3 monomer is made, 0.3 80% and the molecular weight regulator 0.1～0.6% of～0.6% initiator ammonium persulfate, stir, be allowed to condition at and carry out polymerization in the reactor, at 80 ℃ below the temperature, drip remaining 20% initiator ammonium persulfate, add the emulsion that remaining 2/3 the pre-emulsification of monomer is made simultaneously, reinforced being operated in one hour finished, maintain the temperature at below 80 ℃ 2 hours behind reinforced the end, regulate the pH value of liquid to pH=4 with ammoniacal liquor, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
Positively effect of the present invention is: the present invention adopts pre-emulsification technology, monomer, emulsifying agent and initiator can be mixed more equably, making during reaction, monomer, emulsifying agent and initiator keep stable ratio always, can make reaction more steady like this, the good stability of each component polyreaction in reaction, the emulsion appearance of generation, feel are all better, can reach not thickening in 16 hours, prevented from caking, bonding force is strong, firmness is high, brings great convenience to subsequent disposal.
Embodiment
Embodiment one
1, preparation pre-emulsion:
With 100 kilograms of deionized waters, 1.8 kilograms of styroyl Soxylat A 25-7s and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then 73 kilograms of butyl acrylates, 22 kilograms of vinylbenzene, 2.2 kilograms of fluorobutyl acrylates, 2.8 kilograms of vinylformic acid are slowly added, after fully stirring, can obtain stable monomer pre-emulsion.
2, in reactor, add 50 kilograms of deionized waters, 1/3 pre-emulsified monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 pre-emulsified monomer emulsion down at 80 ℃, reinforced process was finished in one hour, the reinforced back of finishing was insulation below 80 ℃ 2 hours, regulate the pH value of liquid to pH=4 with ammoniacal liquor then, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
Embodiment two
1, preparation pre-emulsion:
With 100 kilograms of deionized waters, 1.8 kilograms of styroyl Soxylat A 25-7s and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then 70 kilograms of butyl acrylates, 25 kilograms of vinylbenzene, 2.4 kilograms of fluorobutyl acrylates, 2.6 kilograms of vinylformic acid are slowly added, after fully stirring, can obtain stable monomer pre-emulsion.
2, in reactor, add 50 kilograms of deionized waters, 1/3 pre-emulsified monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 pre-emulsified monomer emulsion down at 80 ℃, reinforced process was finished in one hour, the reinforced back of finishing was insulation below 80 ℃ 2 hours, regulate the pH value of liquid to pH=4 with ammoniacal liquor then, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
Embodiment three
1, preparation pre-emulsion:
With 100 kilograms of deionized waters, 1.8 kilograms of styroyl Soxylat A 25-7s and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then 74.5 kilograms of butyl acrylates, 20.5 kilograms of vinylbenzene, 2.8 kilograms of fluorobutyl acrylates, 2.2 kilograms of vinylformic acid are slowly added, after fully stirring, can obtain stable monomer pre-emulsion.
2, in reactor, add 50 kilograms of deionized waters, 1/3 pre-emulsified monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 pre-emulsified monomer emulsion down at 80 ℃, reinforced process was finished in one hour, the reinforced back of finishing was insulation below 80 ℃ 2 hours, regulate the pH value of liquid to pH=4 with ammoniacal liquor then, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
The case test result:
Acrylic acid emulsion for abrasive belt is through checking wherein: solids content is 38-50%; PH value 3.0-5.0; Viscosity is that (S) is 12-16; The hide glue compatibility: 68 ℃ are mixed more than 16 hours with 40% hide glue (1: 2), do not lump, not crosslinked.
Claims (3)
1. the preparation method of an acrylic acid emulsion for abrasive belt, it is characterized in that, with 100 kilograms of deionized waters, 1.8 kilogram styroyl Soxylat A 25-7 and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then with 73 kilograms of butyl acrylates, 22 kilograms of vinylbenzene, 2.2 kilogram fluorobutyl acrylate, 2.8 kilogram vinylformic acid slowly adds, after fully stirring, can obtain stable monomer pre-emulsion, in reactor, add 50 kilograms of deionized waters, 1/3 monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 monomer pre-emulsion down at 80 ℃, reinforced process was finished in one hour, and the pH value of liquid is regulated to pH=4 with ammoniacal liquor then insulation below 80 ℃ 2 hours in the reinforced back of finishing, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
2. the preparation method of an acrylic acid emulsion for abrasive belt, it is characterized in that, with 100 kilograms of deionized waters, 1.8 kilogram styroyl Soxylat A 25-7 and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then with 70 kilograms of butyl acrylates, 25 kilograms of vinylbenzene, 2.4 kilogram fluorobutyl acrylate, 2.6 kilogram vinylformic acid slowly adds, after fully stirring, can obtain stable monomer pre-emulsion, in reactor, add 50 kilograms of deionized waters, 1/3 monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 monomer pre-emulsion down at 80 ℃, reinforced process was finished in one hour, and the pH value of liquid is regulated to pH=4 with ammoniacal liquor then insulation below 80 ℃ 2 hours in the reinforced back of finishing, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
3. the preparation method of an acrylic acid emulsion for abrasive belt, it is characterized in that, with 100 kilograms of deionized waters, 1.8 kilogram styroyl Soxylat A 25-7 and 0.9 kilogram of sodium lauryl sulphate stirring and dissolving, then with 74.5 kilograms of butyl acrylates, 20.5 kilogram vinylbenzene, 2.8 kilogram fluorobutyl acrylate, 2.2 kilogram vinylformic acid slowly adds, after fully stirring, can obtain stable monomer pre-emulsion, in reactor, add 50 kilograms of deionized waters, 1/3 monomer pre-emulsion, 0.24 the ammonium persulphate and the 0.2 kilogram molecular weight conditioning agent of kilogram, stir, drip 0.6 kilogram 10% ammonium persulfate aqueous solution and 2/3 monomer pre-emulsion down at 80 ℃, reinforced process was finished in one hour, and the pH value of liquid is regulated to pH=4 with ammoniacal liquor then insulation below 80 ℃ 2 hours in the reinforced back of finishing, with 200 order net filtrations, discharging obtains acrylic acid emulsion for abrasive belt then.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102368258A CN101423584B (en) | 2008-12-11 | 2008-12-11 | Method for preparing acrylic acid emulsion for abrasive belt |
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| CN2008102368258A CN101423584B (en) | 2008-12-11 | 2008-12-11 | Method for preparing acrylic acid emulsion for abrasive belt |
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| CN101423584A CN101423584A (en) | 2009-05-06 |
| CN101423584B true CN101423584B (en) | 2010-10-20 |
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| CN102925083B (en) * | 2011-08-10 | 2015-05-20 | 吴祖顺 | Aqueous hot melt adhesive and its preparation method |
| CN105175616B (en) * | 2015-09-22 | 2017-12-05 | 齐齐哈尔大学 | A kind of Organic fluoride acrylate copolymer emulsion finishing agent, its preparation method and application |
| CN105801746B (en) * | 2016-03-28 | 2017-12-01 | 齐齐哈尔大学 | A kind of Organic fluoride modification acrylate flax finishing agent and its preparation method and application |
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