Process for the preparation of organopolysiloxane surfactants
US4857583A · kind A · utility
41Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Jul 2, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process is provided for the preparation of siloxane-oxyalkylene block copolymer surfactant compositions which utilized a hydrosilation reaction with high boiling point polar polyols as the reaction solvent. The reaction solvent need not be removed from the block copolymer, particularly when the block copolymer is used as a surfactant for polyurethane foam formulations. Dipropylene glycol is the preferred polar solvent and when used in the preparation of the surfactants need not be removed when the surfactants are employed in the preparation of urethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.