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US 4,067,838 AGranted
Chelate-forming aqueous resin composition
AssigneeDai Nippon Toryo Co., Ltd.
InventorsMasaaki Hayashi, Kazuyoshi Tsuneta, Hiroharu Sasaki, Hiroshi Takada
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Abstract
A chelate-forming two-pack type aqueous resin composition comprising (i) an aqueous dispersion of a resin containing in the molecule at least 2 epoxy groups and (ii) a reaction product formed between an amino curing agent containing in the molecule at least 2 nitrogen atoms and active hydrogen atoms bonded thereto and protocatechuic acid and/or gallic acid is disclosed.
Claims15
A two-pack type aqueous resin composition having a chelate-forming capacity, which comprises
- 1. an aqueous dispersion of a resing having in the molecule at least two epoxy groups, and
- 2. a reaction product formed between an amino curing agent having in the molecule at least two nitrogen atoms and active hydrogen atoms bonded thereto and 5-30% by weight based on the curing agent of protocatechuic acid and/or gallic acid.
Dependencies are inferred from the claim text.