Aqueous resin composition and coated metal material having cured coating of the same
US6514619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Aug 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31529
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous resin composition comprising prepared by a process comprising the steps of: reacting epoxy resins comprising: (A) an aromatic epoxy resin having a number average molecular weight of at least 9,000 and an epoxy equivalent of not larger than 9,000; and (B) an aromatic epoxy resin having a number average molecular weight of less than 9,000 and an epoxy equivalent of not larger than 5,000, and (C) a carboxyl group-containing acrylic resin having a glass transition temperature of at least 100° C., to undergo partial-esterification to obtain an acryl-modified epoxy resin; neutralizing said acryl-modified epoxy resin with a base and dispersing the neutralized resin in an aqueous medium. Also disclosed is a coated metal material having a cured coated film of the aqueous resin composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.