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The acrylic copolymer emulsion based on the product of emulsion polymerization of acrylic acid esters or methacrylic acid esters with other vinyl ester monomers. It is generally acrylic acid (A, B) Dioxide as a main monomer, and methacrylic acid esters, styrene, acrylonitrile, vinyl acetate esters such copolymer obtained. Currently, the most widely used is a (meth) acrylate ester copolymer, vinyl acetate / (meth) acrylate copolymer and a styrene / (meth) acrylic acid ester copolymer emulsion. In most cases, but also adding a functional monomer and a crosslinking agent, such as methyl acrylate, N-methylol acrylamide. Except that the ester group-containing acrylic copolymer emulsion side chain, usually also contain polar groups such as a hydroxyl group, an amino group, a carboxyl group, such a special structure such that it has light resistance, acid and alkali resistance and corrosion resistance and other properties . In addition, it is also possible by changing the copolymerization hardness monomer, the functional monomer, the type of crosslinking agent, and other measures to change the type and performance of the acrylic copolymer. Therefore, the wide variety of acrylate copolymer emulsion, acrylic emulsion, styrene-acrylic emulsion, vinyl acetate-acrylate emulsion, silicone acrylic emulsion chloropropyl emulsion can usually be divided into categories, and each has its own unique properties. Now widely used in adhesives, coatings and other fields. Domestic compared the emulsion with foreign manufacturers in the preparation of high-performance non-woven adhesive there is a large gap, it is difficult to meet the requirements of the production of non-woven fabric manufacturers, there is still much room for development. Pre-emulsified semi-continuous seed emulsion polymerization process of the papers prepared for the non-woven acrylic copolymer emulsion, and test and characterization using FTIR, TG and SEM methods. Emulsion copolymerization process by adding the functional monomer and the internal crosslinking agent to improve the water resistance and mechanical properties of the copolymer emulsion; added after the emulsion copolymerization process hexamethoxymethyl melamine (HMMM) external crosslinker, in order to improve copolymer emulsion water resistance, corrosion resistance and mechanical properties. In addition, in the copolymer emulsion and external crosslinker and drying the film forming process, the addition of ethylene glycol and an acidic catalyst, to accelerate the deposition rate, improves the water resistance and mechanical properties of the coating film to a certain extent. This paper also detailed discussion of the copolymerizable monomer, the functional monomer, emulsifier, initiator agent, reaction temperature, hexamethoxymethylmelamine, ethylene glycol, and an acidic catalyst such factors impact the adhesive properties of the copolymer emulsion. The ultimate synthesis of high solid content (50%), excellent water resistance, good mechanical properties (420N/5cm), short drying time, non-toxic and non-flammable, etc., environmentally friendly water-based polyacrylate emulsion adhesive.
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