Normal temperature self-crosslinking acrylic emulsion and preparation method thereof

A self-crosslinking acrylic acid and emulsion technology, applied in the direction of coating, can solve the problems of high temperature sticking, low temperature brittleness, poor water resistance, etc., to achieve the effect of improving high temperature sticking, solving water resistance, and meeting customer needs

Active Publication Date: 2012-02-22
山东奔腾漆业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based coatings conventionally use acrylic emulsions to form films with poor water resistance, and problems such as high-temperature stickiness and low-temperature embrittlement. Therefore, in order to bett

Method used

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  • Normal temperature self-crosslinking acrylic emulsion and preparation method thereof
  • Normal temperature self-crosslinking acrylic emulsion and preparation method thereof
  • Normal temperature self-crosslinking acrylic emulsion and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0018] A kind of preparation method of normal temperature self-crosslinking acrylic acid emulsion of the present invention, comprises the following steps:

[0019] A. Pre-emulsification of monomers in the early stage: 1 / 3 of 50-52 parts of deionized water, 2 / 3 of 2-3 parts of emulsifier RN-30, 12-16 parts of butyl acrylate, 22-28 parts Methyl methacrylate, 0.5 to 1 part of hydroxyethyl acrylate, 0.3 to 0.6 parts of acrylic acid, 0.1 to 0.3 parts of sodium bicarbonate and 1 to 2 parts of diacetone acrylamide are put into the pre-emulsification dropping tank in turn under stirring. Close the feeding port, take a sample and control it for detection, and stop stirring after the material is in a uniform and stable dispersed phase;

[0020] B. Initiation: put 1 / 3 of 50-52 parts of deionized water and 1 / 2 of 0.2-0.4 parts of ammonium persulfate into the initiator dripping tank in turn under stirring, fully dissolve and set aside;

[0021] C. Mid-term monomer drop polymerization: 1 / 3...

example 1

[0027] Example 1: Common Emulsion Polymerization Process

[0028] A: 1 / 3 of 50-52 parts of deionized water, 2 / 3 of 2-3 parts of emulsifier RN-30, 12-16 parts of butyl acrylate, 22-28 parts of methacrylic acid Methyl ester, 0.5-1 part of hydroxyethyl acrylate, 0.3-0.6 part of acrylic acid, 0.1-0.3 part of sodium bicarbonate, put them into the pre-emulsification dripping tank in turn under stirring state, close the feeding port, control in the sampling, and wait for the material to be After a uniform and stable phase, stop stirring and set aside.

[0029] B: Mix 1 / 2 of 0.2-0.4 parts of ammonium persulfate and 1 / 3 of 50-52 parts of deionized water evenly under stirring, and put them into the initiator dropping tank for later use.

[0030] C: Put 1 / 3 of 50-52 parts of deionized water, 2 / 3 of 2-3 parts of emulsifier RN-30 and 1 / 2 of 0.2-0.4 parts of ammonium persulfate into the reaction kettle under stirring , close the feeding port and start to heat up. When the temperature rise...

example 2

[0032] Example 2 silicon modified core-shell type acrylic acid emulsion polymerization process

[0033] A: 1 / 3 of 50-52 parts of deionized water, 2 / 3 of 2-3 parts of emulsifier RN-30, 12-16 parts of butyl acrylate, 22-28 parts of formazan Methyl acrylate, 0.5-1 part of hydroxyethyl acrylate, 0.3-0.6 part of acrylic acid, 0.1-0.3 part of sodium bicarbonate are put into the pre-emulsification drop tank in turn under stirring, and the feeding port is closed. Sampling is controlled in the center, and after the material is in a uniform dispersed phase, stop stirring and set aside.

[0034] B: Put 1 / 3 of 50-52 parts of deionized water and 1 / 2 of 0.2-0.4 parts of ammonium persulfate into the initiator dripping tank under stirring, and stir well for later use.

[0035] C: Put 1 / 3 of 50-52 parts of deionized water, 1 / 3 of 2-3 parts of emulsifier RN-30, and 1 / 2 of 0.2-0.4 parts of ammonium persulfate into the reaction under stirring Raise the temperature in the kettle, and when the te...

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Abstract

The invention discloses a normal temperature self-crosslinking acrylic emulsion and a preparation method thereof. The acrylic emulsion is obtained by radical-initiated polymerization of the following raw materials by weight: 50 to 52 parts of deionized water, 2 to 3 parts of emulsifier RN-30, 12 to 16 parts of butyl acrylate, 22 to 28 parts of methyl methacrylate, 0.5 to 1 part of hydroxyethyl acrylate, 0.3 to 0.6 part of acrylic acid, 0.4 to 0.8 part of vinyltrimethoxy silane, 0.1 to 0.3 part of sodium bicarbonate, 0.2 to 0.4 part of ammonium persulfate, 1 part to 2 parts of diacetone-acryloamide, 0.5 part to 1.5 parts of adipic dihydrazide, 0.1 to 0.14 part of the oxidizing agent tert-butyl hydroperoxide, 0.1 to 0.14 part of the reducing agent rongalite and 0.3 to 0.6 part of ammoniacalliquor. The normal temperature self-crosslinking acrylic emulsion provided in the invention has better water resistance and oil resistance and greatly enhances the problems of after tack at high temperature and embrittlement at low temperature under the condition that the quality of a final product is guaranteed to be no worse than the quality of products of a same kind.

Description

technical field [0001] The invention relates to an acrylic emulsion, in particular to a normal temperature self-crosslinking acrylic emulsion. The present invention also relates to a preparation method of the above normal temperature self-crosslinking acrylic emulsion. Background technique [0002] There are many types of emulsions, such as vinegar-acrylic emulsion, pure acrylic emulsion, styrene-acrylic emulsion, silicone modified emulsion, etc. [0003] Normal temperature self-crosslinking acrylic acid emulsion is usually prepared by weight percentage of 50-52% deionized water, 35-45% acrylic acid monomer, 2-3% emulsifier, under the system of 0.2-0.4% initiator, Obtained by free radical polymerization. [0004] In recent years, with the improvement of people's awareness of environmental protection and the country's compulsory policy on environmental protection requirements, it is an inevitable trend for the coating industry to transform to water-based coatings, high-soli...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F220/28C08F230/08C08F220/58C08F220/06C08F2/30C08J3/24C09D133/12
Inventor 朱克魏科海杨龙超
Owner 山东奔腾漆业股份有限公司
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