Aqueous coating of carboxyl acrylic resin-epoxy resin product

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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Details

523409, 523411, C08K 504, C08L 3302, C08L 6302

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active

057805326

ABSTRACT:
An aqueous coating composition comprising a carboxyl-containing reaction product neutralized and dispersed in an aqueous medium, the reaction product being produced by the esterification reaction of a carboxyl-containing acrylic resin (A) and an epoxy resin (B), the acrylic resin (A) comprising a carboxyl-containing polymerizable unsaturated monomer (A) and another polymerizable unsaturated monomer (b) as a monomer component, the acid value of the acrylic resin (A) at a higher molecular weight region with respect to its weight average molecular weight being higher by at least 80 mg KOH/g than at a lower molecular weight region, and a process for preparing said aqueous coating composition. The coating composition is capable of forming a coating film excellent in fabrication property, corrosion resistance, water resistance, flavor-retaining ability, among others. As a consequence, even a thin film of the composition is uniform in thickness and is outstanding in resistance to cratering and sagging.

REFERENCES:
patent: 4247439 (1981-01-01), Matthews et al.
patent: 4458040 (1984-07-01), Suzuki et al.
patent: 4897434 (1990-01-01), Shimada et al.
patent: 5264469 (1993-11-01), Mysliwczyk et al.

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