Block copolyethers via oxonium coupling of poly(tetramethylene ether) glycols
US5284980A · kind A · utility
3Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/3312
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Treatment of poly(tetramethylene ether) glycols with acid catalysts at elevated temperatures leads to a chain coupling with rapid increase in molecular weight. Various alcohols including diols and triols can be incorporated into poly(tetramethylene ether) glycol backbone with modified properties and performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.