POLYESTER RESIN FOR METAL COATING AND METHOD FOR PRODUCING THE SAME

摘要

A polyester resin for covering metal sheets, comprising an acid component chiefly consisting of a terephthalic acid and, further, containing 1 to 15 mol% of an isophthalic acid and 2 to 10 mol% of a dimeric acid; and an alcohol component chiefly consisting of an ethylene glycol; wherein the dimeric acid contains not less than 20 mol% of an aliphatic dimeric acid, and the molar ratio of the aliphatic dimeric acid and an alicyclic dimeric acid is in a range of 1:1 to 1:5. The polyester resin for covering metal sheets features excellent film-forming property, closely adhering property during the working and elution resistance.