Elastic styrene acrylic emulsion for polymer cement waterproof coating and preparation method thereof

An elastic styrene-acrylic emulsion and waterproof coating technology, applied in cement coatings, antifouling/underwater coatings, and biocide-containing paints, etc. milk and other problems, to achieve the effects of excellent cement compatibility, improved film-forming properties, and improved stability

Inactive Publication Date: 2010-11-24
成都科杰高新技术发展有限公司
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Problems solved by technology

It is reported in many literatures that monomers containing carboxyl or amide groups are used as hydrophilic functional monomers. This is a very common method in emulsions for other purposes, and it is also a very effective means. However, in polymer cement waterproofing preparation of emulsions, they are not very suitable hydrophilic functional monomers
For functional monomers containing carboxyl groups, und

Method used

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  • Elastic styrene acrylic emulsion for polymer cement waterproof coating and preparation method thereof

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specific Embodiment 1

[0016] Pre-emulsification: add 80ml deionized water, 7gAEO(9)SO to a 500ml flask 4 Na (30%), methacrylate of 0.5g AEO (9), then dropwise add the mixed monomer of 194g butyl acrylate and 77.5g styrene to the flask, dropwise at a constant speed in about 30min; dissolve 2.5gAMPS in In 10g of deionized water, use sodium carbonate to adjust the pH to neutral, then add 2g of N-methylolacrylamide, after the dissolution is complete, add to the flask, continue to stir for 10 minutes, and set aside.

[0017] Polymerization: Add 80g of deionized water to a 1000ml flask, heat up to 85°C, add 7.5g (10%) sodium persulfate solution, add a total amount of 5% pre-emulsion after 5 minutes for seed polymerization, and complete the seed polymerization in 15 minutes , obvious blue light appeared, the reflux of the bottle wall disappeared, and the remaining pre-emulsion and 30g (2.5%) sodium persulfate solution began to be added dropwise, and the dropwise addition was completed at the same time in ...

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Abstract

The invention relates to elastic styrene acrylic and elastic acrylate emulsions and a polymerization method thereof, in particular to an elastic styrene acrylic emulsion for a polymer cement waterproof coating and a preparation method thereof. The prepared emulation comprises the components of fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether (methyl) acrylate, n-butyl acrylate, styrene, N-methyl methacrylate, AMPS and N-hydroxymethyl acrylamide. Different from a common waterproof emulsion, the emulsion has the advantages of remarkably reducing the using amount of an emulsifier and a hydrophilic monomer, improving the stability of the polymer emulsion, and improving the membrane formation property of the polymer emulsion and the toughness, strength and waterproof property of a coating.

Description

technical field [0001] The invention relates to elastic styrene-acrylic emulsion and elastic acrylate emulsion and a polymerization method thereof, in particular to an elastic styrene-acrylic emulsion for polymer cement waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement waterproof coating has both the excellent properties of cement and polymer. It is an organic combination of the two materials. It not only has excellent waterproof performance, but also has good construction performance, so it has been widely used in the field of building waterproofing. For polymer cement waterproof coatings, the key factor that determines its quality is the polymer emulsion used to prepare waterproof coatings. It is required that the emulsion not only has good film-forming properties, toughness, and waterproof properties, but more importantly, it must have excellent cement compatibility. In the synthetic method reported in the literature on pol...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F2/26C09D5/16C09D133/06C09D1/06
Inventor 罗孝君
Owner 成都科杰高新技术发展有限公司
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