Water-based coating composition for inner surface of can and method of coating inner surface of can
US6893678B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Feb 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/227
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-based coating composition for the inner surface of cans which comprises an aqueous medium and dispersed therein an acrylic-modified polyester resin (C) obtained by graft-polymerizing one or more polymerizable unsaturated vinyl monomers (B) comprising a carboxylated polymerizable unsaturated monomer with a polyester resin (A) having a number-average molecular weight of 2,000 to 100,000 and a hydroxyl value of 10 to 120 mg-KOH/g and containing ethylenically unsaturated double bonds, the resin (C) being in a neutralized form, and which further contains a resol resin crosslinking agent (D) in an amount of 1 to 40 parts by weight per 100 pans by weight of the acrylic-modified polyester resin (C): and a method of coating the inner surface of a can with the water-based coating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.