A kind of aqueous polyurethane-epoxy resin modified acrylate emulsion and preparation method thereof

Abstract

The embodiment of the invention discloses waterborne polyurethane-epoxy resin modified alanine ester emulsion which is prepared from, by weight, 4.3-5 parts of a polyisocyanate monomer; 1-2 parts of epoxy resin, 18-20 parts of an acrylate monomer, 7-7.5 parts of polyalcohol polymer, 2.5-3 parts of a small molecule hydrophilic chain-extending agent, 0.9-1.1 parts of a hydrophilic chain-extending agent, 0.45-0.6 part of an amine chain-extending agent, 12-14 parts of an alkene monomer containing an active group, 1.5-1.7 parts of hydroxyethyl acrylate, 0.01-0.03 part of polymerization inhibitor, 0.3-0.65 part of a neutralizing agent, 0.03-0.05 part of initiator, 0.04-0.05 part of a catalyst; 0.01-0.02 part of an oxidizing agent and 47-49 parts of deionized water. The embodiment of the invention further provides a preparation method of the waterborne polyurethane-epoxy resin modified alanine ester emulsion, performance and quality of the emulsion are improved, environmental friendliness is achieved, and production cost is lowered while preparation process stability is improved.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to an aqueous polyurethane-epoxy resin modified acrylate emulsion and a preparation method thereof. Background technique [0002] With the enhancement of environmental awareness in various countries and the introduction of stricter environmental regulations, the volatile organic compound (VOC) content of traditional solvent-based coatings has been strictly controlled, thus promoting the rapid development of environmentally friendly water-based coatings. Polyurethane (PU) emulsions and polyacrylate (PA) emulsions have been widely used in coatings, adhesives and other fields, mainly because PU has good physical and mechanical properties, excellent cold resistance elasticity, high gloss and good resistance to organic solvents and other characteristics, while PA has the characteristics of high mechanical strength, aging resistance, light resistance and non-yellowing, and good water resi...

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Problems solved by technology

The emulsion prepared in this way, although the particle structure contains water-based polyurethane-acrylic acid ester PUA composite emulsion, most of them still exist with simple PA and PU, which affects the comprehensive performance of the emulsion; (3) interpenetrating network method, The emulsion prepared by this method can achieve the blending of PU and PA chains at the molecular level, and the performance of the emulsion is improved, but the emulsion is prone to crosslinking and the particle size is large

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