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

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...

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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, under the strong alkaline conditions of cement, the emulsion thickens significantly, and in severe cases, it will cause demulsification; , there will be no thickening and demulsification, but due to the weak force between the amide group and the cement component, it is not conducive to crosslinking inside the polymer or between the polymer and cement, which will affect the final coating. strength and toughness

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