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Polyacrylate emulsion with high water resistance and preparation method thereof

A technology of polyacrylate emulsion and butyl acrylate, which is applied in the field of high water resistance polyacrylate emulsion and its preparation, can solve the problems that water resistance cannot be greatly improved, and achieve reduced emulsifier dosage, uniform particle size distribution, conducive to stabilizing effect

Inactive Publication Date: 2009-09-09
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Acrylic emulsions have been developed and produced at home and abroad, but due to the traditional preparation method of polyacrylate emulsions, in order to endow acrylic emulsions with better performance, a small amount of functional monomers are usually introduced into the copolymerization formula to form cross-linking structure to improve the performance of polyacrylate emulsions, but functional monomers such as (meth)acrylic acid, (meth)hydroxyethyl acrylate, (meth)hydroxypropyl acrylate, and N-methylolacrylamide all have A certain degree of hydrophilicity, so there is no big improvement in water resistance

Method used

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Examples

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preparation example Construction

[0038] The preparation method of above-mentioned highly water-resistant polyacrylate emulsion comprises the following steps (the following are parts by weight):

[0039] a. Pre-emulsification

[0040] Mix 60-80% of a total of 50-100 parts of deionized water with 0.5-2 parts of reactive emulsifier, 1-10 parts of isooctyl acrylate, 15-40 parts of butyl acrylate, 10-45 Add one part of methyl methacrylate, 3 to 5 parts of methacrylic acid, and 2 to 8 parts of epoxy functional monomer into the emulsification kettle, start high-speed stirring, and carry out pre-emulsification, and the time is controlled within 10 to 30 minutes;

[0041] b. Seed aggregation

[0042] Add the remaining 20-40% deionized water and 0.1-0.3 parts of non-ionic emulsifier OP into the reaction kettle, and start heating under stirring. When the temperature reaches 60°C, add a total amount of 0.1-0.4 parts of initiator 20-50% of the ammonium sulfate, ammonium persulfate is added in the form of an aqueous solu...

Embodiment 1

[0046] Mix 70 grams of deionized water, 1.2 grams of allyl polyoxyethylene ether ammonium sulfate, 8 grams of isooctyl acrylate, 38 grams of butyl acrylate, 10 grams of methyl methacrylate, 5 grams of methacrylic acid, 3 grams of methyl All the glycidyl acrylate was added into the emulsification kettle, and high-speed stirring (2000 rpm) was started for pre-emulsification, and the time was controlled within 10 minutes.

[0047] In a four-necked flask equipped with an electric stirrer, a spherical reflux condenser and a thermometer, add 20 grams of deionized water and 0.3 grams of emulsifier OP-10, start the stirrer and start to heat up, when the temperature rises to 60 ° C, add 1 / 4 of the 10% solution made of 0.3g ammonium persulfate, continue to heat up to 75°C, quickly add 30g of pre-emulsion solution dropwise, and react at 75-85°C for about 30 minutes, when the emulsion shows light blue fluorescence, When the reflux is significantly reduced, the seed emulsion has been forme...

Embodiment 2

[0050] Mix 60 grams of deionized water, 1.4 grams of 2-acrylamido-2-methyl-propyl ammonium sulfonate, 1 gram of isooctyl acrylate, 20 grams of butyl acrylate, 45 grams of methyl methacrylate, 3 grams of methyl Acrylic acid and 7 grams of diglycidyl methacrylate are all added in the emulsification kettle, and high-speed stirring (1500 rpm) is started for pre-emulsification, and the time is controlled at 20 minutes.

[0051] In a four-necked flask equipped with an electric stirrer, a spherical reflux condenser and a thermometer, add 15 grams of deionized water and 0.1 grams of emulsifier OP-10, start the stirrer and start to heat up, when the temperature rises to 60 ° C, add 1 / 4 of the 10% solution made of 0.3g ammonium persulfate, continue to heat up to 75°C, quickly add 30g of pre-emulsion solution dropwise, and react at 75-85°C for about 30 minutes, when the emulsion shows light blue fluorescence, When the reflux is significantly reduced, the seed emulsion has been formed, an...

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Abstract

The invention discloses a polyacrylate emulsion with high water resistance and a preparation method thereof. The polyacrylate emulsion consists of the following components (in parts by weight: 1-10 parts of isooctyl acrylate; 15-40 parts of butyl acrylate; 10-45 parts of methyl methacrylate; 3-5 parts of methylacrylic acid; 2-8 parts of epoxy functional monomer; 0.5-2 parts of a reactive emulsifier; 0.1-0.3 part of a nonionic emulsifier OP; 0.1-0.4 part of ammonium persulfate and 50-100 parts of deionized water. The preparation method thereof comprises three steps of pre-emulsification, seeding polymerization and polyreaction. In the preparation method, a monomer with vinyl and epoxy is taken as the functional monomer, which facilitates to improve the water resistance of the polyacrylate emulsion.

Description

technical field [0001] The invention relates to a highly water-resistant polyacrylate emulsion and a preparation method thereof. Background technique [0002] Polyacrylate emulsion is the product of emulsion polymerization of acrylate or methacrylate and other vinyl ester monomers. Currently the most widely used are (meth)acrylate copolymer emulsion, vinyl acetate / (meth)acrylate copolymer emulsion, styrene / (meth)acrylate copolymer emulsion. The emulsion polymerization process generally includes batch emulsion polymerization, semi-continuous emulsion polymerization, continuous emulsion polymerization, pre-emulsification process, seed emulsion polymerization, etc. Acrylate copolymer emulsion overcomes the shortcomings of oily copolymers such as flammability, explosion, toxicity, and serious environmental pollution. Acrylate copolymer emulsion is widely used as base material and adhesive for architectural coatings. The market continues to develop and the amount of use is incre...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/32C08F2/24
Inventor 潘安健黄剑清
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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