Method for preparing ester end-capped polyalkylene ether
US5344964A · kind A · utility
10Cited by
10References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 24, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2615
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerization at a temperature of 10.degree.-80.degree. C. and a pressure of 0-10 atm in the presence of a solid acid of a mixed oxide of group III and group IV elements serving as catalyst and a mixture of acid and acid anhydride serving as molecular weight moidifier. The group III and group IV elements used should have a Ho index of +3.0 to -10.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.