MANUFACTURING METHOD OF PRIMER RESIN FOR OPTICAL PET FILM

摘要

Disclosed is an acrylic polymer resin represented by chemical formula 1, which is a resin for an optical PET film surface protecting layer, wherein the molar ratio of a glycidyl-based monomer ranges from 50% to 70% with respect to the total monomer of a glycidyl-based monomer and a nonglycidyl-based monomer in a molecule. In chemical formula 1, R1, R2, and R3 are identical or different and represent -H or -CH3; R4 and R5 are identical or different, represent an alkyl group or a glycidyl group, and do not comprise -H and -ROH; m and n are each an integer greater than or equal to 1, and satisfies an inequality, m>=n; and n satisfies an inequality, n = x + Y. The resin according to the present invention is a solvent-type binder including a glycidyl group of 50% or more on a basis of molar ratio in a molecule, and can be used in a one-component type, a two-component type and a UV curing type. Also, the resin is used in alone or in combination for various paints, thereby improving adhesion of a dried paint film and reducing shrinkage of the dried paint film. The resin can be used as a primer for a PET material when coated alone. Also, in the case of a high-hardness UV paint for PET material surface protection, the resin is added to the paint and mixed, thereby being effective in overcoming the film shrinkage and adhesion failure of a cured paint film.