Fluoroorganopolysiloxane and a process for preparing the same
US5118775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fluoroorganopolysiloxane having the following general unit formula (I): ##STR1## wherein R.sup.1 represents a fluorine-containing organic group represented by the following formula: EQU F--(--C.sub.g F.sub.2g O--).sub.d --C.sub.h F.sub.2h CH.sub.2 -- where PA0 d represents an integer of from 1 to 5, g represents an integer of from 1 to 3, and h is an integer of 1 or 2, PA0 R.sup.2 represents a divalent hydrocarbon group containing no fluorine atom, PA0 R.sup.3 represents a hydrocarbon group containing no fluorine atom, PA0 a is a number of from 0.001 to 0.34, PA0 b is a number of from 1.64 to 2.34, PA0 c is a number of from 0 to 0.67, and a+b+c ranges from 1.90 to 2.67, and having a viscosity of not less than 1.times.10.sup.6 at 25.degree. C., and a process for preparing the same. This polymer is useful as a raw material of heat-vulcaization type fluorosilicone rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.