A kind of UV-curable low-viscosity epoxy acrylic resin and its preparation method and application

Abstract

The invention relates to an ultraviolet light curable low viscosity epoxy acrylate resin and a preparation method and application thereof. The preparation method of the ultraviolet light curable low viscosity epoxy acrylate resin comprises the following steps: mixing epoxy resin, a polymerization inhibitor and a catalyst A, stirring, heating to 30-130 DEG C, holding the temperature, and fed-batch adding methyl acrylic acid and a catalyst B within 0.3-2.0 h; and further reacting for 4-12 h after fed-batch addition is finished, and discharging to obtain the ultraviolet light curable low viscosity epoxy acrylate resin, wherein the catalyst A is an organic ammonium compound, and the catalyst B is an iron compound and / or a chromium compound. The epoxy acrylate resin prepared by the preparation method of the invention reduces viscosity while retaining the original physical and chemical properties of epoxy acrylate resin, also has the advantages of good wetting property and low yellow-stain, and can be widely used in plastic jackets, paper varnish, form coating or printing ink.

Description

technical field

[0001] The invention relates to the field of ultraviolet light curing, in particular to an ultraviolet light curing low-viscosity epoxy acrylic resin and its preparation method and application. Background technique

[0002] Epoxy acrylic resin is currently one of the most widely used and most used UV-curable prepolymers, which is prepared by esterification of epoxy resin and (meth)acrylic acid. The ring-opening reaction of epoxy resin is a special nucleophilic substitution reaction, and both acidic and basic catalysts can realize the ring-opening of epoxy resin.

[0003] The application of acid catalysts is greatly limited due to their low catalytic efficiency. At present, the commonly used catalysts for epoxy acrylic resins are organic base catalysts, such as N, N-dimethylaniline, triethanolamine, 4-dimethylaminopyridine, Triethylamine, triphenylphosphine or tetramethylammonium chloride, etc. These organic base catalysts are prone to etherification and oth...