Partially cross-linked polyvinyl alcohol
US6960627B2 · kind B2 · utility
45Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 16, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a partially cross-linked polyvinyl alcohol, obtained by reacting a polyvinyl alcohol with a polycarboxylic acid, in particular a hydroxypolycarboxylic acid. The partially cross-linked polyvinyl alcohol can be used to produce foils, which have a good water-solubility or water-swelling capacity. Due to this property, such foils can be used as packing material for detergents, cosmetics and the like. According to the invention, the packing dissolves in water, releases its contents or is suitable for releasing (permeation) chemical compounds or agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.