Hardener composition
US4655841A · kind A · utility
2Cited by
11References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1985 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A stable hardener composition for films of poly (vinyl alcohol) or poly (vinyl acetate) which preferably comprises an alkanol solution containing about 5 to 80% by weight of an aliphatic dialdehyde-bis (di-lower alkyl acetal), from 0 to about 1% by weight of water, and from about one to 30% by weight of the amount of said acetal of a strong Bronsted or Lewis acid, said alkanol being a primary alcohol containing 1 to 6 carbon atoms. The solution may also contain soluble thickening agents and dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.