Ammonia reaction thickened styrene-acrylic emulsion and preparation method thereof

A technology of styrene-acrylic emulsion and ammoniation reaction, which is applied in the direction of coating, etc., can solve the problems of multiple components, poisonous tert-butyl hydroperoxide, and high cost, and achieve simple and easy-to-obtain raw materials, simple and easy preparation process, and production low cost effect

Inactive Publication Date: 2018-10-23
SHANGHAI UNIV
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  • Application Information

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Problems solved by technology

[0003] Chinese patent application number is 200810117667.4 patent document discloses a kind of benzene-acrylic emulsion, relates to a kind of styrene, methyl methacrylate, methacrylic acid, butyl acrylate, ammonium persulfate, tert-butyl hydroperoxide, Non-toxic, safe, and waterproof styrene-acrylic emulsion prepared from sodium polyacrylate and other raw materials, but the tert-butyl hydroperoxide in the raw material is toxic and flammable, and there is a greater danger
Chinese patent application number 201010531412.X discloses a patented styrene-acrylic emulsion with carboxylic acid groups and a styrene-acrylic emulsion interior wall paint and its preparation method, and discloses a styrene-acrylic emulsion with carboxylic acid groups , the coating prepared by the emulsion can react with the epoxy groups, carboxylic acid groups and multivalent metal ions carried in the coating with the evaporation of water and the drop of pH value under medium and low temperature conditions, and finally Form a coating film with water resistance, washing resistance and stain resistance, but the coating still needs to add more thickeners during the preparation process, and the cost is relatively high, indicating that the consistency of the styrene-acrylic emulsion cannot meet the requirements of the coating
The patent document with the Chinese patent application number 201510851291.X discloses an epoxy-modified styrene-acrylic emulsion coating and its preparation method. The epoxy resin with strong adhesion and good anti-corrosion performance is introduced into the coating by means of copolymerization modification. In the structure of styrene-acrylic emulsion, acrylate is distributed on the surface, and epoxy molecules are arranged close to the substrate, so that the respective advantages of epoxy resin and styrene-acrylic resin can be fully utilized to improve the water resistance and stain resistance of styrene-acrylic emulsion , high temperature resistance, etc., but the emulsion formula of the invention has more ingredients, higher cost, and more organic solvents such as film-forming aids, which does not meet the concept of environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In the present embodiment, a method for preparing thickened styrene-acrylic emulsion by ammoniation reaction comprises the following steps:

[0044] a. Preparation of raw materials and ingredients:

[0045] The raw material components and mass percentages of the ammoniated reaction thickened styrene-acrylic emulsion to be prepared are respectively:

[0046] Styrene 19.9%;

[0047] Butyl Acrylate 13.2%;

[0048] Acrylic acid 1.2%;

[0049] Emulsifier A 0.48%;

[0050] Emulsifier B 0.48%;

[0051] Initiator 0.2%;

[0052] Buffer 0.36%;

[0053] Defoamer 0.048%;

[0054] The remaining amount of deionized water;

[0055] Described emulsifier A is sodium lauryl sulfate, belongs to anionic surfactant;

[0056] The emulsifier B is an alkylphenol polyoxyethylene ether, which belongs to a nonionic surfactant;

[0057] Described initiator is ammonium persulfate;

[0058] The defoamer is a general-purpose water-based defoamer;

[0059] Described buffering agent is the ...

Embodiment 2

[0073] This embodiment is basically the same as Embodiment 1, especially in that:

[0074] In the present embodiment, a method for preparing thickened styrene-acrylic emulsion by ammoniation reaction comprises the following steps:

[0075] a. Preparation of raw materials and ingredients:

[0076] The raw material components and mass percentages of the ammoniated reaction thickened styrene-acrylic emulsion to be prepared are respectively:

[0077] Styrene 18.6%;

[0078] Butyl Acrylate 13.2%;

[0079] Acrylic acid 2.38%;

[0080] Emulsifier A 0.48%;

[0081] Emulsifier B 0.48%;

[0082] Initiator 0.2%;

[0083] Buffer 0.6%;

[0084] Defoamer 0.048%;

[0085] The remaining amount of deionized water;

[0086] Described emulsifier A is sodium lauryl sulfate, belongs to anionic surfactant;

[0087] The emulsifier B is an alkylphenol polyoxyethylene ether, which belongs to a nonionic surfactant;

[0088] Described initiator is ammonium persulfate;

[0089] The defoamer i...

Embodiment 3

[0104] This embodiment is basically the same as the previous embodiment, and the special features are:

[0105] In the present embodiment, a method for preparing thickened styrene-acrylic emulsion by ammoniation reaction comprises the following steps:

[0106] a. Preparation of raw materials and ingredients:

[0107] The raw material components and mass percentages of the ammoniated reaction thickened styrene-acrylic emulsion to be prepared are respectively:

[0108] Styrene 17.4%;

[0109] Butyl Acrylate 13.2%;

[0110] Acrylic acid 3.58%;

[0111] Emulsifier A 0.48%;

[0112] Emulsifier B 0.48%;

[0113] Initiator 0.20%;

[0114] Buffer 0.83%;

[0115] Defoamer 0.048%;

[0116] The remaining amount of deionized water;

[0117] Described emulsifier A is sodium lauryl sulfate, belongs to anionic surfactant;

[0118] The emulsifier B is an alkylphenol polyoxyethylene ether, which belongs to a nonionic surfactant;

[0119] Described initiator is ammonium persulfate;

...

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Abstract

The invention discloses a thickening styrene-acrylic emulsion for ammonification reaction and a preparation method thereof. The styrene-acrylic emulsion comprises the following components in percentage by mass: 15-22% of styrene, 10-15% of butyl acrylate, 1-6% of acrylic acid, 0.2-0.6% of emulsifier A, 0.2-0.6% of emulsifier B, 0.1-0.5% of initiator, 0.02-0.07% of defoamer, 0.2-1% of buffering agent and the balance of deionized water. The adopted raw materials are simple and accessible; and the preparation technique is simple and easy to implement, and is low in production cost. The styrene-acrylic emulsion has certain thickness; and the coated film of the emulsion has certain binding strength, and can satisfy the requirements for application in the field of paints. The styrene-acrylic emulsion has certain glass transition temperature; and the glass transition temperature can also be designed according to the demands of the enterprise to obtain the styrene-acrylic emulsion with certain glass transition temperature. The adopted raw materials are green, environment-friendly and pollution-free, and thus, the prepared product is free of toxic and harmful substances and is green and environment-friendly.

Description

technical field [0001] The invention relates to a water-based paint and a preparation method thereof, in particular to a styrene-acrylic emulsion and a preparation method thereof, which are applied in the technical field of paint. Background technique [0002] With the strengthening of environmental protection regulations, water-based coatings are gradually replacing traditional oil-based coatings, which can not only reduce pollution, improve the operation and construction environment, but also reduce costs and save a lot of organic solvents. It has become one of the development directions of the coatings industry. Styrene-acrylic latex paint is one of the main varieties of water-based paint, which is widely used in buildings and rail transit systems. The thickener is one of the important additives for emulsion coatings and adhesives. After using it, it can not only significantly improve the apparent viscosity and thixotropy of the polymer emulsion, but also improve the cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F2/26C08F2/30C08F8/44C09D125/14
CPCC08F8/44C08F212/08C08F2800/20C08F2810/50C09D125/14C08F220/1804C08F220/06
Inventor 周婕陈来张乃超
Owner SHANGHAI UNIV
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