A base film having a polyester-based resin, a polyester-based resin for a primer, a polyester-based aqueous solution and a primer layer, and a laminated film

摘要

INDUSTRIAL APPLICABILITY The present invention is to provide a resin composition which is excellent in adhesion to both of a polyester resin base material and a hard coat layer formed of, for example, an active energy ray curable resin composition, has a high refractive index and is excellent in adhesion even in a high temperature and high humidity environment, A polyester-based resin capable of forming an outer coating film, and a polyester-based aqueous liquid. The polyester resin of the present invention is obtained from the polyvalent carboxylic acid component (A) and the polyol component (B), and the polyvalent carboxylic acid component (A) contains 50 mol% or more of the naphthalenedicarboxylic acid (a1) (B1) having a bisphenol skeleton which does not contain a sulfur-oxygen bond, and the polyester resin has an acid value of 10 mgKOH / g or more, wherein the polyol component (B) to be.