Cellulose acetate propionate
US5977347A · kind A · utility
97Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cellulose acetate propionate is a cellulose ester wherein hydroxyl groups of cellulose are substituted with acetyl and propionyl. Cellulose acetate propionate of the present invention has an amorphous index (Am) of 0.01 to 0.10. The present invention also provides cellulose acetate propionate having a degree of acetyl substitution (DSac) and a degree of propionyl substitution (DSpr) satisfying the formulas (I) to (IV). EQU 2.0<DSac.ltoreq.2.95 (I) EQU 0.05<DSpr.ltoreq.0.8 (II) EQU 2.6<DSac+DSpr.ltoreq.3.0 (III) EQU 1.9<DSac-DSpr (IV)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.