Process for treating a material comprising a polymer by hydrolysis
US5905168A · kind A · utility
151Cited by
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23Claims
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Key dates
| Filing date | Jul 25, 1995 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Jul 25, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous grouping and transforming the hydrolyzed compounds into diacids. The treatment of a polyamide 6.6 results in the recovery of adipic acid and other diacids corresponding to the participating acid monomer and to the transformation of at least one part of the diamine monomer into diacids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.