Non-isomerizable olefinic polyoxyalkylene polymers and siloxane-polyoxyalkylene copolymer derivatives thereof
US3957843A · kind A · utility
21Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1971 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Mar 30, 1991 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to novel polyoxyalkylene polymers characterized by olefinic endblocking groups in which the olefinic double bond is in the alpha position and is incapable of isomerizing or shifting to the beta or any other position. The novel polymers readily undergo addition reactions with siloxanes containing SiH to produce novel siloxane-polyoxyalkylene block copolymers that are useful as foam stabilizers for polyurethane foams. The olefinic double bonds undergo little side reactions during such addition reactions and so the product is relatively free of materials other than the block copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.