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Wet-rub resistant styrene-acrylic emulsion and preparation thereof

A styrene-acrylic emulsion and moisture-resistant technology, which is applied in the field of polymer emulsions, can solve problems such as failure to meet requirements, and achieve the effects of easy control, simple process, and stable polymerization system

Inactive Publication Date: 2008-10-08
传化智联股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, people such as Zhou Yan published an article "The Development of Styrene Acrylic Emulsion for Architectural Coatings" in the 2nd issue of "Colloid and Polymer" in 2005, which adjusted the ratio of soft and hard monomers and changed the amount of acrylic acid monomers. And adding functional monomers such as hydroxyethyl acrylate, N-methylol acrylamide and other means to improve the wet rub resistance of styrene-acrylic emulsion, although this method has improved the wet rub resistance of styrene-acrylic emulsion to a large extent, but in Some conditions that require high wet rub resistance still fail to meet the requirements

Method used

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  • Wet-rub resistant styrene-acrylic emulsion and preparation thereof
  • Wet-rub resistant styrene-acrylic emulsion and preparation thereof
  • Wet-rub resistant styrene-acrylic emulsion and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. The raw material formula of styrene-acrylic emulsion is as follows:

[0016]

[0017] Two, the preparation method of styrene-acrylic emulsion is as follows:

[0018] First, dissolve 2 / 3 of the emulsifier SDS and OP-10 in water, then mix with 2 / 3 of styrene (St), butyl acrylate (BA), and methyl methacrylate (MMA), and stir vigorously for 30 minutes. Obtain a uniform and stable pre-emulsion A; then another part of the compound emulsifier and the remaining styrene (St), butyl acrylate (BA), methyl methacrylate (MMA) and acrylic acid (AA) and methacrylamide Ethylene ethylene urea (MAEEU) was mixed, vigorously stirred for 30 minutes to obtain a uniform and stable pre-emulsion B; the initiator was dissolved in deionized water to make solution C; sodium bicarbonate was dissolved in deionized water to make solution D; Add 1 / 3 each of pre-emulsion A and solution C, deionized water and solution D into the reactor, stir and heat to 78°C for 30 minutes, then add the remainin...

Embodiment 2

[0020] 1. The raw material formula of styrene-acrylic emulsion is as follows:

[0021]

[0022] Two, the preparation method of styrene-acrylic emulsion is as follows:

[0023] First, dissolve 1 / 2 of the emulsifier SDS and TX-10 in water, and then mix with 1 / 2 and 1 / 3 of methyl methacrylate (MMA) of styrene (St) and butyl acrylate (BA). Stir for 30 minutes to obtain a uniform and stable pre-emulsion A; then another part of the compound emulsifier and the remaining styrene (St), butyl acrylate (BA), methyl methacrylate (MMA) and acrylic acid (AA) and Mix methacrylamide ethyl ethylene urea (MAEEU) and stir vigorously for 30 minutes to obtain a uniform and stable pre-emulsion B; dissolve the initiator in deionized water to make solution C; dissolve sodium bicarbonate in deionized water to make Solution D: Take 1 / 3 each of pre-emulsion A and solution C, deionized water and solution D into the reaction kettle, stir and heat to 78°C for 45 minutes, then add the remaining pre-emul...

Embodiment 3

[0025] 1. The raw material formula of styrene-acrylic emulsion is as follows:

[0026]

[0027] Two, the preparation method of styrene-acrylic emulsion is as follows:

[0028] First, dissolve 1 / 2 of the emulsifier SDS and TX-10 in water, then mix with 1 / 2 of styrene (St), butyl acrylate (BA), and methyl methacrylate (MMA), and stir vigorously for 45 minutes. Obtain a uniform and stable pre-emulsion A; then another part of the compound emulsifier and the remaining styrene (St), butyl acrylate (BA), methyl methacrylate (MMA) and acrylic acid (AA) and methacrylamide Ethylene ethylene urea (MAEEU) was mixed, vigorously stirred for 45 minutes to obtain a uniform and stable pre-emulsion B; the initiator was dissolved in deionized water to make solution C; sodium bicarbonate was dissolved in deionized water to make solution D; Add 1 / 3 each of pre-emulsion A and solution C, deionized water and solution D into the reactor, stir and heat to 80°C for 45 minutes, then add the remainin...

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Abstract

The invention discloses a wet-rub resistant styrene-acrylic emulsion and the preparation method. The existing styrene-acrylic emulsion still can not reach the requirements under the conditions with high wet-rub resistance. The invention is takes styrene, butyl acrylate, methyl methacrylate and acrylic acid as the polymeric monomer of the system, the functional monomers containing ureido as the modified monomer of the system, compound emulsifiers as the emulsifier of the system, and thermal decomposition initiators as the initiator of the system, so as to prepare and obtain the wet-rub resistant styrene-acrylic emulsion through core-shell polymerization. The invention adopts the core-shell polymerization technology to enable the functional monomer components to be mainly distributed in the shell layers by controlling the dropping rate, so as to achieve the purpose of modifying the styrene-acrylic emulsion. The styrene-acrylic emulsion obtained through such a method has better wet-rub resistant performance and can be used as the base material of interior and exterior wall coatings, which has good prospects for development.

Description

technical field [0001] The invention relates to a polymer emulsion, in particular to a wet rub-resistant styrene-acrylic emulsion and a preparation method thereof. Background technique [0002] Styrene-acrylic emulsion is a copolymerized emulsion of styrene and acrylate monomers. The styrene-acrylic emulsion paint formulated with it as the main film-forming substance is non-toxic, non-environmental polluting, and has good weather resistance, color retention, and water resistance. , Alkali resistance, so it has been widely used in latex paint for interior and exterior walls and other water-based paints. my country began to develop styrene-acrylic emulsion in the 1970s, and it was officially put into use in the 1980s. Up to now, there are still some problems in the actual application process, especially compared with similar foreign products, there is still a considerable gap, such as The minimum film forming temperature is high, the stability of calcium particles is low, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F2/24C08F4/30C08F220/14C08F220/06
Inventor 张高奇原玉锋王小君罗巨涛
Owner 传化智联股份有限公司
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