Thermoplastic compositions for water soluble foams
US5089535A · kind A · utility
18Cited by
18References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Oct 22, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2329/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Thermoplastic compositions of internally plasticized polyvinyl alcohol material and a low molecular weight alcohol are provided that can be extruded into water soluble biodegradable foams. The compositions can be modified to provide foams that have varying degrees of water solubility and a broad range of physical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.