Depolymerization of substantially amorphous polyesters
US5328982A · kind A · utility
24Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Nov 2, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ester bonds are hydrolyzed in the conversion of substantially amorphous polyesters to their monomeric components, by being contacted with a mixture of (a) an alcohol, such as methanol, or glycol, (b) a polar aprotic solvent such as N-methyl-pyrrolidone or dimethyl sulfoxide and (c) an alkoxide or hydroxide such as sodium hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.