Ester hydrolysis and depolymerization of polyester and polycarbonate polymers
US5045122A · kind A · utility
28Cited by
10References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 14, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Dec 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/09
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ester bonds are hydrolyzed, such as in the conversion of 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.