Organopolysiloxane compositions hardening into translucent elastomers at room temperature in the presence of humidity
US6777471B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Aug 7, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns organopolysiloxane compositions obtainable by the following successive steps: step 1: reacting (i) at least a linear diorganopolysiloxane reagent A comprising a hydroxyl group at each chain end; (2i) and at least a hydroxyl organopolysiloxane resin B having a weight content of hydroxyl group ranging from 0.1 to 10%; (3i) with at least a polyalkoxysilane C; step 2: introducing in the medium of step 1 (6i) a mineral filler G based on amorphous silica and (7i) an efficient amount of a catalyst H consisting of at least one titanium organic derivative; step 3: the resulting mixture is subjected to devolatilization carried out at a pressure less than atmospheric pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.