Self-crosslinking vinyl acetate-acrylic emulsion modified with waterborne neoprene latex and cured at room temperature and preparation method of vinyl acetate-acrylic emulsion

Abstract

The invention belongs to the technical field of emulsion preparation and discloses a self-crosslinking vinyl acetate-acrylic emulsion modified with waterborne neoprene latex and cured at room temperature and preparation method of vinyl acetate-acrylic emulsion. The emulsion is prepared from the following components in parts by mass through a reaction: 39.43-55.93 parts of water, 12.66-15.88 parts of aqueous neoprene latex, 8.12-15.72 parts of butyl acrylate, 12.12-19.72 parts of vinyl acetate, 9.86-12.12 parts of isooctyl acrylate, 1.4-1.5 parts of a functional monomer, 0.2-0.3 parts of polyvinyl alcohol, 2.33-3.7 parts of an emulsifier, 0.07-0.093 parts of a buffer agent, 0.14-0.2 parts of an initiator, 0.42-0.64 parts of diacetone acrylamide, 0.21-0.32 parts of a crosslinking agent, 0.025-0.035 parts of tert-butyl hydroperoxide and 0.015-0.025 parts of sodium formaldehyde sulfoxylate. With introduction of the water-based neoprene latex, initial viscosity and cohesion strength are significantly improved, and waterproof, anti-fouling and anti-corrosion properties as well as peel strength are greatly improved after film forming.

Description

technical field [0001] The invention belongs to the technical field of emulsion preparation, and in particular relates to a room temperature curing self-crosslinking water-based neoprene latex modified vinegar-acrylic emulsion and a preparation method. Background technique [0002] Vinegar-acrylic emulsion is one of the most important emulsion adhesives in the world today. Because it is easy to use, does not pollute the environment, and is cheap, it is widely used in daily life and industrial production, such as wood processing, furniture assembly, fabric bonding, packaging materials, building decoration and many other fields. [0003] Vinegar-acrylic emulsion contains strong polar groups and has good adhesive strength, but its application is greatly restricted due to its shortcomings such as high glass transition temperature, poor low-temperature film-forming property, water resistance, cold resistance and poor mechanical stability. limit. In order to meet the higher requ...

AI Technical Summary

Problems solved by technology

In CN104497927A, by introducing butadiene rubber on the molecular chain of vinegar-acrylic emulsion, the method for graft copolymerization modification has prepared vinegar-acrylic emulsion, although the prepared emulsion has improved the wetting of adhesive to film material to a certain extent. Wetness and affinity, but because of the poor solubility of butadiene rubber in acrylic monomers, the grafting efficiency is very low, and the performance improvement of the emulsion is not obvious

CN1155634C utilizes organosilicon material to carry out grafting modification to acrylic acid emulsion, has solved the water resistance of emulsion, antifouling performance, but because the polarity of organosilicon material is relatively poor, makes the bonding performance of emulsion and the adhesive force to material reduce

In the above-mentioned technical cases, some mechanical properties of the emulsion can be improved to some extent by selecting different materials to modify the emulsion, but it cannot meet the requirements for the initial viscosity and peel strength of the emulsion.

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