Title:
AQUEOUS COATING AGENT AND COATING FILM CONSISTING OF THE SAME AS WELL AS LAMINATE
Document Type and Number:
Japanese Patent JP2014234450
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous coating agent capable of forming a coating film excellent in terms of adhesiveness to a metal, in particular, and having favorable scratch resistance as well as water resistance and acid resistance under high-temperature conditions.SOLUTION: The provided aqueous coating agent is an aqueous coating agent including a polyester resin (A), a resol-type phenolic resin (B), a basic compound, and an aqueous medium. The polyester resin (A) includes at least 50 mol% of an aromatic dicarboxylic acid as a polybasic acid component and at least 20 mol% of a linear glycol possessing no side chains as a polyhydric alcohol component. The acid value is 5-40 mgKOH/g, and (A)/(B) is 95/5-30/70 (mass ratio). The polyester resin has a number-average molecular weight of at least 4,000 and a glass transition point or melting point of 40 to 100°C. The aqueous coating agent includes virtually no surfactant but includes a crosslinking agent.
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Inventors:
SUGIHARA TAKASHI
Application Number:
JP2013116465A
Publication Date:
December 15, 2014
Filing Date:
May 31, 2013
Export Citation:
Assignee:
UNITIKA LTD
International Classes:
C09D167/03; B32B15/09; C09D5/02; C09D7/12; C09D161/06