Hydrosilation in esters without hydroxyl moieties
US5648444A · kind A · utility
6Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Nov 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention encompasses manufacturing polysiloxane polyether copolymers using esters without any hydroxyl groups thereon, organohydrogen silanes and unsaturated polyoxyalkylene polyethers. Said esters are of low volatility and high boiling point and have at least eight carbons. The process yields clear copolymer solutions and do not need to have the ester solvent stripped. Also taught are novel compositions incorporating the ester solvent to make the copolymer and the copolymer and the ester solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.