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Interpolymer latex of polystyrene and acrylic ester in hud polymerization type, and preparation method

An acrylate and copolymer emulsion technology, applied in the field of emulsion polymerization, can solve the problems of poor wet adhesion of the coating film, low scrub resistance, and easy cracking of the coating film, so as to improve the scrub resistance, hiding power and stain resistance. Contamination, the effect of reducing dosage

Inactive Publication Date: 2007-12-26
CHANGZHOU GUANGHUI CHEM +1
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  • Summary
  • Abstract
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Problems solved by technology

For the same monomer, if the production process is different, the product quality, production efficiency and cost will be different. However, the conventional styrene-acrylic emulsion is mainly made of styrene monomer and acrylate monomer. It is made by a semi-continuous process, so as the ambient temperature rises during use, the coating film becomes soft and easy to stick back and stain; when the ambient temperature is low, the coating film is anti-adhesive and stain-resistant The stain resistance is improved, but the coating film is hard and brittle and easy to crack, the wet adhesion of the coating film is poor, and the scrub resistance is not high

Method used

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Embodiment Construction

[0016] Core-shell polymerization type styrene-acrylic acid ester copolymer emulsion of the present invention, its component and weight percent are as follows:

[0017] Emulsifier, wherein said emulsifier is any two or three mixtures of anionic emulsifier, nonionic emulsifier and allyl ether hydroxypropyl sodium sulfonate functional emulsifier, 0.2-1.5%;

[0018] Monomer, wherein said monomer is a mixture of soft monomer, hard monomer and functional monomer with epoxy group and oxysilane, 45-55%;

[0019] Initiator, 0.1~0.3%

[0020] PH regulator, 0.1-0.2%;

[0021] Deionized water balance;

[0022] The solid content of the emulsion is 48-52%, wherein: the glass transition humidity Tg of the core is 25°C-35°C, and the glass transition humidity Tg of the shell is -5°C-5°C.

[0023] The anionic emulsifier of the present invention selects ethoxylated phenol ether sodium sulfate or sulfosuccinate; the nonionic emulsifier selects special phenol ether, nonylphenol polyoxyethylene ...

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Abstract

This invention relates to a core-shell polystyrene-acrylate copolymer emulsion, which comprises: emulsifiers 0.2-1.5 wt.%, monomers 45-55 wt.%, initiator 0.1-0.3 wt.%,, pH regulator 0.1-0.2 wt.%, and deionized water as balance. The emulsifiers are two or three of anionic emulsifier, nonionic emulsifier and functional allyloxy hydroxypropyl sulfonate emulsifier. The monomers are soft monomer, hard monomer and functional silane monomer containing epoxy groups and oxy groups. The solid content of the emulsion is 48-52%, the glass transition temperature of the core is 25-35 deg.C, and the glass transition temperature of the shell is (-5)-5 deg.C. The emulsion has such advantages as high wet adhesivness of the coating film and high washing resistance of the coating film.

Description

technical field [0001] The invention belongs to the field of emulsion polymerization, and in particular relates to a core-shell polymerization type styrene-acrylate copolymer emulsion and a preparation method thereof. Background technique [0002] There are a variety of processes to choose from for the production of polymer emulsions. Such as batch process, semi-continuous process, continuous process, supplementary emulsifier process and seed emulsion polymerization process, etc. For the same monomer, if the production process is different, the product quality, production efficiency and cost will be different. However, the conventional styrene-acrylic emulsion is mainly made of styrene monomer and acrylate monomer. It is made by a semi-continuous process, so as the ambient temperature rises during use, the coating film becomes soft and easy to stick back and stain; when the ambient temperature is low, the coating film is anti-adhesive and stain-resistant The stain resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/10C08F2/24C08F2/44C08F4/40
Inventor 巫峡曹玉峰邓玲贤刘琳
Owner CHANGZHOU GUANGHUI CHEM
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