Water based coating composition with improved process resistance
US5266628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Mar 31, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D133/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coating composition which may be water based and which is adapted for metallic substrates is disclosed, having: (1) binder resin comprising acrylic polymer having carboxy functionality, and (2) a curing agent comprising hydroxyalkylamide, wherein the ratio of hydroxy groups in the hydroxyalkylamide to carboxy groups in the binder resin is less than 0.5:1, preferably less than 0.4 to 1, and most preferably less than 0.35 to 1. The composition has been found to yield films exhibiting good resistance to water at high temperatures, thereby rendering them particularly suitable for use on metal food and beverage containers that are subjected to sterilization or pasteurization processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.