Silicone release coating compositions
US7592412B2 · kind B2 · utility
10Cited by
11References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2004 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Jul 2, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A release coating composition according to the present invention comprises an alkenyl functional polysiloxane (1), a silicon hydride functional polysiloxane (11) and a catalyst (111) comprising a platinum group metal. The alkenyl functional polysiloxane (1) is an alkenylterminated polysiloxane prepared by siloxane polycondensation and/or equilibration using a phosphazene base catalyst followed by neutralisation with an acidic neutralising agent. The level of catalyst (III) in the composition can be as low as 2-40 parts per million platinum group metal by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.