Synthesis of poly(propylene fumarate) by acylation of propylene glycol in the presence of a proton scavenger
US6355755B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Oct 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/52
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
High molecular weight linear poly(propylene fumarate) having a relatively low polydispersity index by utilizing a relatively pure intermediate and a method for making same. Fumaryl chloride and propylene glycol are reacted in the presence of potassium carbonate. The potassium carbonate present in the reaction solution prevents the acid by-product from catalyzing reactions at the fumarate double bond. The bis(propyl fumarate) produced according to this technique can be transesterified using conventional processing steps to yield P(PF). The P(PF) produced from bis(propyl fumarate) produced according to the present method has a higher molecular weight and is purer than P(PF) produced using previously known techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.