Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters
US4929749A · kind A · utility
19Cited by
2References
11Claims
0Family size
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Key dates
| Filing date | Mar 15, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Mar 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of terephthalate esters having the following general formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain or branched alkyl group having from 6 to 15 carbon atoms. The process comprises reacting a terephthalate polyester with a high molecular weight alcohol or mixture of high molecular weight alcohols in the presence of a catalyst and recovering the desired compound according to formula (I). This process is particularly useful for recycling scrap terephthalate polyesters such as polyethylene terephthalate and polybutylene terephthalate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.