Organosilicon materials
US5068303A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Sep 28, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/032
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crosslinkable organosilicon prepolymer and a crosslinked organosilicon polymer comprising alternating hydrocarbon and cyclic polysiloxane radicals, which is the hydrosilation reaction product of: PA1 (a) at least one polyene having at least two non-aromatic, non-conjugated carbon-carbon double bonds highly reactive in hydrosilation, the carbon-carbon double bonds being either in an alpha, beta or gamma position on a linear carbon moiety, next to two bridgehead positions in a strained polycyclic aliphatic ring structure, or in a cyclobutene ring, other than polycyclic polyenes having two reactive double bonds in a fused ring system; PA1 (b) at least one polycyclic polyene having at least two chemically distinguishable non-aromatic, non-conjugated carbon-carbon double bonds in its rings; PA1 (c) at least one cyclic polysiloxane containing three or more .tbd.SiH groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.