Curable, storage-stable liquid organopolysiloxane compositions
US4064096A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Feb 9, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/70
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Curable, storage-stable liquid organopolysiloxane compositions are formulated by [A] admixing (a) a diorganopolysiloxane oil having a viscosity ranging from between 400 and 3,000 cps at 25.degree. C., said diorganopolysiloxane being terminated at its chain ends with a moiety selected from the group consisting of (CH.sub.3).sub.3 SiO.sub.0.5, (CH.sub.3).sub.2 CH.sub.2 =CHSiO.sub.0.5 and (CH.sub.3).sub.2 C.sub.6 H.sub.5 SiO.sub.0.5, and the organo radicals comprising the said diorganopolysiloxane being selected from the group consisting of methyl, vinyl and phenyl, with (b) silica having a specific surface area in excess of 80 m.sup.2 /g, (c) water, and (d) a Si-N bonded silylating agent; [B] next devolatilizing the mixtures [A]; and thence [C] admixing with the devolatilized product [B], (e) an .alpha.,.omega.-dihydroxypolysiloxane oil having a viscosity ranging from between 2,000 and 60,000 cps at 25.degree. C. and (f) an inorganic filler. Organopolysiloxane elastomers useful as molding compositions are prepared by curing the aforesaid formulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.