Polyacrylate emulsion microgel and preparation method thereof

A technology of polyacrylate emulsion and n-butyl acrylate, which is applied in the field of polyacrylate emulsion microgel and its preparation, can solve the problems of non-presentation of gel rate and increase of graft rate, and achieve enhanced water resistance and film formation dense effect

Active Publication Date: 2015-07-15
HANGZHOU HIWETECH CHEM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2000, Asua et al. (Plesssis C, Arzamendi G, Leiza JR, Schoobrood HAS, Charmot D, Ausa JM. A decrease in effective acylate propagation rate constants caused by intramolecular chain transfer. Macromolecules 2000,33:5041-5047) studied At 75°C, the polymerization kinetics of BA under the operating conditions of seed emulsion semi-continuous polymerization and its molecular chain structure, they regulated the instantaneous conversion rate of monomer through the initiator concentration, the amount of monomer added and the time of dropping, and found that BA The grafting rate of the monomer increases with the increase of the instantaneous conversion rate of the monomer, but the gel rate does not show obvious regularity

Method used

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  • Polyacrylate emulsion microgel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) 2.2g PS-725A (Shanghai Zhongcheng Fine Chemical Co., Ltd.), 1.8g LE407k (SASOL company), 0.1g sodium bicarbonate (Shanghai Aibi Chemical Reagent Co., Ltd.), 5g n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomers were added to 96g deionized water, stirred at 300rpm and started Heat up; when the temperature rises to 85°C, adjust the stirring to 150rpm, add 4.3g of sodium persulfate (Suzhou Huahang Chemical Technology Co., Ltd.) aqueous solution (0.3g of sodium persulfate dissolved in 4g of deionized water);

[0035] (2) After the obvious blue light appeared in the reaction system, 58g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomer was added dropwise within 7 hours, and 5g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd. City Zhongye Chemical Co., Ltd.) monomer and the mixed solution of 32g methyl methacrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomer, and, when starting to drop monomer, drip 13.7g sodium persulfate ( Su...

Embodiment 2

[0038] (1) 2g PS-725A (Shanghai Zhongcheng Fine Chemical Co., Ltd.), 1.8g LE407k (SASOL company), 0.12g sodium bicarbonate (Shanghai Aibi Chemical Reagent Co., Ltd.), 5g n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomers were added to 95.34g deionized water, stirred at 700rpm and Start to heat up; when the temperature rises to 82°C, adjust the stirring to 200rpm, add 4.3g of sodium persulfate (Suzhou Huahang Chemical Technology Co., Ltd.) aqueous solution (0.3g of sodium persulfate is dissolved in 4g of deionized water);

[0039] (2) After the obvious blue light appeared in the reaction system, 60g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomer was added dropwise within 6 hours, and then 5g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd. City Zhongye Chemical Co., Ltd.) monomer and the mixed solution of 30g methyl methacrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomer, and, when starting to drop monomer, drip 14.5g sodium persu...

Embodiment 3

[0042] (1) 2.4g PS-725A (Shanghai Zhongcheng Fine Chemical Co., Ltd.), 1.6g LE407k (SASOL company), 0.2g sodium bicarbonate (Shanghai Aibi Chemical Reagent Co., Ltd.), 5g n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) monomers were added to 94.1g deionized water, stirred under the condition of 550rpm and Start to heat up; when the temperature rises to 83°C, adjust the stirring to 250rpm, add 4.3g of sodium persulfate (Suzhou Huahang Chemical Technology Co., Ltd.) aqueous solution (0.3g of sodium persulfate is dissolved in 4g of deionized water);

[0043] (2) After the system has obvious blue light, add 62g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd.) dropwise within 5 hours, and then add 5g of n-butyl acrylate (Guangzhou Zhongye Chemical Co., Ltd. Zhongye Chemical Co., Ltd.) monomer and 28g methyl methacrylate (Guangzhou Zhongye Chemical Co., Ltd.) Huahang Chemical Technology Co., Ltd.) aqueous solution (3g sodium persulfate is dissolved in 12.5g deion...

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Abstract

The invention provides a polyacrylate emulsion microgel, which is composed of the following raw materials in parts by weight: 2 to 2.4 parts of anionic emulsifier, 1.6 to 1.8 parts of nonionic emulsifier, 0.1 to 0.2 part of pH buffering agent, 1.5 to 3.3 parts of initiator, 25 to 35 parts of methyl methacrylate monomer, 65 to 75 parts of butyl acrylate monomer, 0.06 to 0.08 part of tert-butyl hydroperoxide, 0.06 to 0.08 part of rongalite, and 114.6 to 116.5 parts of deionized water. The microgel has the advantages of simple technology, compact and uniform film, and good waterproof property.

Description

(1) Technical field [0001] The invention relates to a polyacrylate emulsion microgel and a preparation method thereof, in particular to a polyacrylate emulsion microgel applicable to water-based paint and ink systems and a preparation method thereof. (2) Background technology [0002] With the increasing awareness of environmental protection, high solid content and water-based systems have become one of the development directions of coatings and inks. High solid content coatings and inks are prone to increase in viscosity due to the increase in solid content, which greatly affects the construction and use effect. In order to solve the contradiction between "high solid" and "low viscosity", researchers have taken many measures, among which reducing the molecular weight of the film-forming resin is the main means of regulation (such as introducing chain transfer reagents in the process of emulsion polymerization of synthetic resins, increasing Initiator concentration, increas...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F2/28C08F2/30C09D133/08C09D11/107
Inventor 许华君许少宏
Owner HANGZHOU HIWETECH CHEM TECH CO LTD
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