Cationic polymerization of cyclic ethers
US4988797A · kind A · utility
39Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Mar 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cyclic ethers having 4 and 5 member rings are polymerized with a alcohol initiator and an acid catalyst. The acid catalyst is used at a molar ratio relative to hydroxyl groups of the alcohol initiator of between about 0.05:1 and about 0.5:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.