Patent ID: 6818699
Filing Date: 2004-11-16
Classification: C08J,C09D

Abstract:
An aqueous dispersion of polyester resin having an acid value of 8 to 40 mg KOH/g and a weight average molecular weight of 9,000 or more,wherein the aqueous dispersion contains an organic solvent less than 0.5% by mass; the polyester is formed of dicarboxylic acid as a dicarboxylic acid component among constitutional acid components; wherein said dicarboxylic acid is at least one dicarboxylic acid selected from the group consisting of terephthalic acid, isophthalic acid, orthopthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, oxalic acid, succinic acid, succinic anhydride, adipic acid, azelaic acid, sebasic acid, dodecanedioic acid, hydrogenated dimer acid, fumaric acid, maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, citraconic acid, citraconic anhydride, dimer acid, 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 2,5-norbornenedicarboxylic acid, an anhydride of 2,5-norbornenedicarboxylic acid, tetrahydrophthalic acid and an anhydride of tetrahydrophthalic acid; the polyester contains aromatic polybasic acids as a constituent acid component at a ratio of 70% by mole or higher; and the polyester may contain as the constituent acid component a tri- or more carboxylic acid and/or a monocarboxylic acid.