Two-part curable liquid silicone rubber composition
US11345817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2020 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Jan 14, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A two-part curable liquid silicone rubber composition is provided in which the first liquid composition and the second liquid composition yield, upon mixing, a curable liquid silicone rubber composition which, when cured, yields a silicone elastomer having an elongation-at-break value of at least 800%. The silicone elastomers of the invention comprise at least one alkenyl group-containing organopolysiloxane having two silicon-bonded alkenyl groups per molecule, at least one diorganohydrogensiloxy-terminated polydiorganosiloxane, at least one organosilicon crosslinker containing at least 3 silicon-bonded hydrogen atoms per molecule, at least one addition reaction catalyst, and at least one filler. Also provided are silicone elastomers having an elongation-at-break value of at least 800% and withstand elongation without breaking. An article for a medical device comprising a cured product of the two-part curable liquid silicone rubber compositions or the silicone elastomers of the invention are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.