Olefinically functional polyorganosiloxanes and curable silicone compositions comprised thereof
US5795947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Functional mixed polyorganosiloxanes, well suited for formulation into curable release compositions, notably for paper, comprise the same or different recurring structural units of the formula (I): EQU R.sub.a Y.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I) in which the radicals R are each an alkyl, vinyl, aryl or aralkyl radical, at least 80% of the radicals R being methyl radicals, the radicals X are each H or a reactive polar functional group devoid of the heteroatoms nitrogen and sulfur, the radicals Y are at least C.sub.4 alkenyl or alkenyloxy radical containing at least one site of ethylenic unsaturation at a polymer chain end or along the polymer chain, a, b and c are equal to 0, 1, 2 or 3, and a+b+c=0, 1, 2 or 3, with the proviso that the number of SiO.sub.4/2 units is less than 30 mol %, and are prepared from the corresponding organohydropolysiloxanes devoid of the X functional groups and the Y radicals, from the corresponding alkenes from which the alkenyl or alkenyloxy radicals Y are derived and from the corresponding ethylenically or hydroxylated organic compounds from which the X functional groups are derived, whether via simultaneous or successive addition reactions, or via s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.