Preparation of hydrolyzable group-containing organohydrogenpolysiloxane and organopolysiloxane derived therefrom
US8158716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2009 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Jan 20, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hydrolyzable group-containing organohydrogenpolysiloxane is prepared by (A) reacting (a) an organosiloxane with (b) an organosilane or organosiloxane containing a hydrolyzable group, at least one of components (a) and (b) containing hydrosilyl, in the presence of a superstrong acid catalyst, (B) adding an inorganic basic neutralizing agent and/or an adsorbent to the resulting reaction solution, and (C) removing the neutralized and/or adsorbed form of the superstrong acid catalyst. The process proceeds in an essentially non-aqueous system, and the organohydrogenpolysiloxane free of residual acidic catalyst is obtainable at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.