A kind of aqueous polyacrylate emulsion and preparation method thereof

Abstract

The invention discloses a water-based polyacrylate emulsion and a preparation method thereof. At present, there are few reports on the emulsions of large particle size, low viscosity, and high solid aqueous polyacrylates that meet various stability and application requirements. In the present invention, one or more of butyl acrylate, ethyl acrylate, and isooctyl acrylate are used as soft monomers, and one or more of methyl methacrylate, styrene, methyl acrylate, and acrylonitrile are used as soft monomers. Hard monomer, one or more of methacrylic acid, acrylic acid, itaconic acid, acrylamide, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, N-methacrylamide The first is a functional monomer, the compound emulsifier and the reactive emulsifier construct an emulsification system, the redox system initiator is used as the initiator, and the polymerization process of high-shear pre-emulsification and seed emulsion is used to obtain large particle size, high solid content and Low viscosity aqueous polyacrylate emulsion.

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,...

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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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