Universal vinyl acetate-vinyl versatate-acrylate copolymer emulsion interface agent and preparation method thereof

Abstract

The invention relates to a universal vinyl acetate-vinyl versatate-acrylate copolymer emulsion interface agent and a preparation method thereof. The universal vinyl acetate-vinyl versatate-acrylate copolymer emulsion interface agent is mainly prepared from the following components in parts by weight: 10-20 parts of polyvinyl alcohol with a mass percent concentration of 10-15%, 20-30 parts of a vinyl acetate-vinyl versatate-acrylate copolymer emulsion and 55 to 65 parts of water. According to the invention, the defects that a conventional polyvinyl acetate emulsion interface agent has insufficient permeability and poor capacity in infiltration into a base material surface of a wall and is poor in compatibility with cement and low in adhesive force to a wall surface and that the bonding strength of mortar or putty and the surface of a wall body is insufficient are overcome; vinyl versatate, butyl acrylate, hydroxypropyl acrylate and vinyl acetate are added and subjected to copolymerization so as to prepare the vinyl acetate-vinyl versatate-acrylate copolymer emulsion which is used for preparing the universal vinyl acetate-vinyl versatate-acrylate copolymer emulsion interface agent; and the universal vinyl acetate-vinyl versatate-acrylate copolymer emulsion interface agent has characteristics of excellent tensile bonding strength, excellent water resistance, excellent freezing resistance after construction, excellent thermal storage stability, excellent environmental protection property and the like.

Description

technical field [0001] The invention relates to a general-purpose vinegar, tertiary and acrylic copolymer emulsion interface agent and a preparation method thereof, which are applied in the field of building decoration coatings. Background technique [0002] The interface agent is a surface treatment agent that improves or completely changes the surface properties of the material by physically and chemically treating the surface of the object. Interface agents are used in different fields, and their surface treatment methods and purposes are also different. The interface agent has excellent permeability, can fully infiltrate the surface of the base material of the wall, make the base layer dense through cross-linking, improve the interface adhesion, improve the bonding strength between the mortar or putty and the wall surface, and prevent hollowing. [0003] Common polymer emulsion interface agents mainly include styrene-butadiene emulsion, styrene-acrylic emulsion, acrylic...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the insufficient permeability of the existing polyvinyl acetate emulsion interface agent, poor ability to infiltrate the surface of the wall base material, poor compatibility between the interface agent and cement, low adhesion to the wall, and insufficient bonding strength between the mortar or putty and the wall surface etc., the present invention provides a general-purpose vinegar, tertiary, acrylic copolymer emulsion interface agent and its preparation method, which is prepared by adding tertiary ethylene carbonate, butyl acrylate, hydroxypropyl acrylate and vinyl acetate for copolymerization. Vinegar, tertiary, acrylic copolymer emulsion is produced, and then the modified emulsion is used to prepare a general-purpose vinegar, tertiary, acrylic copolymer emulsion interface agent. The general-purpose vinegar, tertiary, acrylic copolymer emulsion interface agent has tensile bonding strength and water resistance , frost resistance after construction, heat storage stability, environmental protection and other performance comprehensive effects are good

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