Cellulose ester-copolyester ether blends
US4992491A · kind A · utility
4Cited by
11References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A blend of a cellulose and up to 5 percent by weight of a polyesterether resin and photographic film base having improved tear strength prepared from the blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.