Water-based polyacrylate emulsion and preparation method thereof

Abstract

The invention discloses a water-based polyacrylate emulsion and a preparation method thereof. At present, literatures about a large-particle diameter, low-viscosity and high-solid content water-based polyacrylate emulsion meeting various stability and application requirements at the same time are rarely reported. The large-particle diameter, high-solid content and low-viscosity water-based polyacrylate emulsion is prepared from one or more of butyl acrylate, ethyl acrylate and isooctyl acrylate as a soft monomer, one or more of methyl methacrylate, styrene, methyl acrylate and acrylonitrile as a hard monomer, one or more of methacrylic acid, acrylic acid, itaconic acid, acrylamide, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate and N-methacrylamide as a functional monomer, a composite emulsifier and a reactive emulsifier for building an emulsifying system, and a redox system initiator as an initiator through high-shear preemulsification and seed emulsion polymerization.

Description

technical field [0001] The invention relates to a polymer emulsion, in particular to a water-based polyacrylate emulsion with large particle size, high solid content and low viscosity and a preparation method thereof. Background technique [0002] Water-based polyacrylate is an emulsion mainly copolymerized with acrylate monomers. Adhesives and coatings formulated with it as the main film-forming substance are non-toxic, non-environmental polluting, and have good weather resistance and color retention. , water resistance, alkali resistance, my country has been put into use since the 1970s and 1980s, and is currently widely used in textiles, papermaking, coatings, packaging, leather and other fields. However, there are still some problems in the actual application process, especially compared with similar foreign products, there is still a considerable gap, such as low solid content, insufficient mechanical and calcium particle stability, poor water and wet rubbing resistance,...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the actual application process, especially compared with similar foreign products, there is still a considerable gap, such as low solid content, insufficient mechanical and calcium particle stability, poor water and wet rubbing resistance, etc.

[0003] At present, energy saving, emission reduction and green environmental protection are required for development, and high-solid multifunctional water-based polyacrylate resin conforms to this trend, which can reduce energy consumption, storage and transportation and simplify the production process, which requires the product to be multi-functional and compatible Good, adaptable to a variety of processes, easy to adjust a variety of properties; when the solid content of the emulsion is ≥ 55% in conventional emulsion polymerization, the viscosity of the emulsion system will be high, which not only seriously affects the next step of practical application and performance adjustment, but also may Affect the normal progress of the polymerization reaction; the viscosity of the emulsion system can be reduced by reducing the emulsifier and increasing the particle size in the emulsion polymerization, but the side effects are that the chemical, mechanical and storage stability of the emulsion deteriorates, and the compounding and application function problems increase, resulting in many problems such as poor film-forming properties and bonding fastness

[0004] After literature search, it is found that there are many patents and research papers on the preparation of polyacrylate emulsions, but there are few literatures on large particle size, low viscosity, high solid aqueous polyacrylate emulsions that meet various stability and application requirements. There are reports

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