Process for producing an organsiloxane polymer
US8168740B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2008 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Apr 23, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for producing an organosiloxane polymer and novel organosiloxane polymer compositions. The process according to the invention comprises hydrolyzing tetraalkoxysilane monomers in a hydrolysis step; and polymerizing said hydrolyzed monomers in a polymerization step by subjecting them to conditions conducive to polymerization to form an organosiloxane polymer. The hydrolysis step is conducted in a reaction medium comprising an organic compound with hydroxy groups. The invention allows for the synthesis of siloxane polymer compositions suitable for thin-film applications using a high content of tetra- and trifunctional silixane polymer precursors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.