Acrylic ester polymer emulsion and preparation method thereof

A polymer emulsion and acrylate technology, applied in the field of acrylate polymer emulsion and its preparation, can solve the problems of low drying yield, poor redispersion film-forming property, poor water resistance, etc., and achieve good re-dispersion performance and film-forming performance , The effect of improving water resistance, mechanical properties and bonding properties

Inactive Publication Date: 2010-04-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the existing emulsion polymerization technology is used to prepare acrylate emulsions for polymer latex powder. Due to the heterogeneous structure of the core-shell of the latex particles, the microphase separation, the large particle size of the latex, etc., make the acrylic esters redispersible. Latex powder has disadvantages such as low drying yield, poor redispersion film-forming property, and poor water resistance.

Method used

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  • Acrylic ester polymer emulsion and preparation method thereof
  • Acrylic ester polymer emulsion and preparation method thereof
  • Acrylic ester polymer emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The composition of acrylate polymer emulsion comprises methyl methacrylate, butyl acrylate, 2-hydroxyethyl acrylate, methacrylic acid, and its specific component formula is as follows table 1:

[0044] Table 1

[0045]

[0046]

[0047] The preparation method of acrylate polymer emulsion, its step is as follows:

[0048] a. Mix the above-mentioned quality of alkyl methacrylate, alkyl acrylate, hydroxyalkyl ester and methacrylic acid respectively to prepare mixed monomer I and mixed monomer II. According to the FOX formula, the Tg of the copolymer composed of the mixed monomer I is -21.9°C, and the Tg of the copolymer composed of the mixed monomer I is 36.5°C.

[0049] B, preparation of seed emulsion: join the above-mentioned quality 60% water, 50% emulsifier and 30% initiator in the reaction kettle equipped with thermometer, agitator, feeding pipe, condensing reflux pipe, stir and disperse for 15 minutes, wait The temperature was raised to 80° C., and 10% of the...

Embodiment 2

[0054] The composition of acrylate polymer emulsion includes methyl methacrylate, ethyl methacrylate, butyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, acrylic acid, and its specific composition The allocation party is as follows in Table 2:

[0055] Table 2

[0056]

[0057]

[0058] The preparation method of acrylate polymer emulsion, its step is as follows:

[0059] a. Mix the above mass parts of alkyl methacrylate, alkyl acrylate, hydroxyalkyl ester and methacrylic acid respectively to prepare mixed monomer I and mixed monomer II. According to the FOX formula, the Tg of the copolymer composed of the mixed monomer I is -39.5°C, and the Tg of the copolymer composed of the mixed monomer I is 49.8°C.

[0060] b. Preparation of seed emulsion: join the above-mentioned 70% water by mass, 40% emulsifier and 50% initiator into a reaction kettle equipped with a thermometer, agitator, feeding pipe, and condensing reflux pipe, stir and dispe...

Embodiment 3

[0065] The composition of acrylate polymer emulsion includes ethyl methacrylate, propyl methacrylate, ethyl acrylate, butyl acrylate, 2-hydroxyethyl acrylate, 5-hydroxypentyl acrylate, methacrylic acid, and its composition The allocation party is as follows in Table 3:

[0066] table 3

[0067]

[0068] The preparation method of acrylate polymer emulsion, its step is as follows:

[0069] a. Mix the above mass parts of alkyl methacrylate, alkyl acrylate, hydroxyalkyl ester and methacrylic acid respectively to prepare mixed monomer I and mixed monomer II. According to the FOX formula, the Tg of the copolymer composed of the mixed monomer I is -32.0°C, and the Tg of the copolymer composed of the mixed monomer I is 43.7°C.

[0070] b. Preparation of seed emulsion: join the above-mentioned 80% water by mass, 60% emulsifier and 40% initiator into a reaction kettle equipped with a thermometer, agitator, feeding pipe, and condensing reflux pipe, stir and disperse for 20 minutes, ...

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Abstract

The invention discloses an acrylic ester polymer emulsion and a preparation method thereof. The acrylic ester polymer emulsion comprises alkyl acrylate, alkyl methacrylate, hydroxy-alkyl ester, initiator, emulsifier and water, and alkyl carboxylic acid is prepared by emulsion polymerization. The preparation method comprises the following steps: mixing 30%-60% of the alkyl methacrylate, 50%-90% of the alkyl acrylate, 0-40% of the hydroxy-alkyl ester, 0-50% of the alkyl carboxylic acid to prepare a mixed monomer I; and then mixing rest of the alkyl methacrylate, the alkyl acrylate, the hydroxy-alkyl ester and the alkyl carboxylic acid to prepare a mixed monomer II; dropwise adding the mixed monomer II to rest of the mixed monomer I, and finally adding to a seed solution all together. Phase separation does not happen to the emulsion and emulsion powder prepared by using the same in film formation after redispersion, therefore, the emulsion and the emulsion powder prepared by using the same have good film formation and can meet all high-performance paintings on the film formation of emulsion.

Description

technical field [0001] The invention relates to an acrylate polymer emulsion, in particular to an acrylate polymer emulsion and a preparation method thereof. Background technique [0002] The redispersible polymer latex powder is obtained from the polymer matrix emulsion through drying and powdering technology. After dispersion with water, it can reproduce the regenerated emulsion with the same properties and similar uses as the original polymer emulsion. It is of great economic and social significance to prepare this polymer matrix emulsion and its latex powder, and to develop dry powder architectural coatings on this basis. However, during the preparation of redispersible polymer latex powder, polymer latex particles and emulsifiers are subjected to high temperature and high-speed shear, and physical and chemical processes such as phase separation, glass transition, fusion, and crystallization have occurred to a certain extent. Changes, for the redispersible polymer latex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/10C08F220/14C08F220/18C08F2/26C08F2/24
Inventor 张心亚裴勇兵黄洪陈焕钦
Owner SOUTH CHINA UNIV OF TECH
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