Hardenable compositions comprising polyacid(s) and polyol(s)
US7511098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides hardenable coating compositions, comprising: a first compound selected from the group consisting of polyacids, polyanhydrides, salts thereof and mixtures thereof, and a second compound having two or more active hydrogen groups. When used as a roll coating composition, the first compound preferably has a low average molecular weight and an acid number greater than about 100. The hardenable coating composition preferably has an extended open time and can be rapidly cured to a substantially tack-free state in less than about one minute at 200° C. Coated articles and methods of coating are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.