Process for preparation of organopolysiloxanes
US5130399A · kind A · utility
30Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present process for producing an organopolysiloxane is characterized in that the polymerization of an organosiloxane by using an alkali catalyst is carried out in the presence of a reversible dehydrating agent such as magnesium sulfate and calcium carbonate or an irreversible dehydrating agent such as calcium oxide. According to this manufacturing process, there is a quite distinct mutual relation between the preset composition of the organopolysiloxane to be manufactured and the viscosity of the actually manufactured organopolysiloxane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.