Sheet and tube siloxane polymers containing a pendent organofunctional group
US5977248A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 3, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jun 3, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Gels, cast films, coatings, extruded rods, extruded fibers, compression molded discs, and machined compression molded discs, are made from organopolysiloxane sheet or tube polymers such as an apophyllite-derived 3-cyanopropyldimethyl siloxy sheet polymer of the formula [((NCC.sub.3 H.sub.6)(CH.sub.3).sub.2 SiO).sub.x (HO).sub.1-x SiO.sub.1.5 ].sub.n. Polymers are prepared by contacting sheet or tube silicates with an organohalosilane containing at least one polar group such as cyanoalkyl, acyloxy, or haloalkyl, in the presence of a polar solvent or a mixture of a polar solvent and a non-polar solvent; and heating the mixture until a polymer is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.