Heat curable silicone rubber composition with improved resistance to engine oils and coolants
US6417263B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A heat curable silicone rubber composition, having improved resistance to engine coolants and oils, including long-life coolants and synthetic motor oils, comprises:(A) 100 parts by weight of an organosiloxane polymer base comprising an organosiloxane polymer containing at least 2 silicon-bonded alkenyl groups in each molecule and 1 to 65 weight percent reinforcing silica filler,(B) curing component sufficient to cure the composition when heated, and(C) an effective amount of at least one metal salt additive selected from the group consisting of monobasic alkali metal phosphates, alkali metal oxalates, alkali metal tartrates, alkali metal tetraborates, alkali metal phthalates, alkali metal citrates; dibasic metal phosphates where the metal is selected from the group consisting of sodium, potassium, calcium and magnesium; metal acetates, where the metal is selected from the group consisting of sodium, potassium, calcium, magnesium; metal sulfates where the metal is selected from the group consisting of sodium, potassium, calcium, magnesium, aluminum, and zinc; and metal carbonates where the metal is selected from the group consisting of sodium, potassium, calcium, magnesium, aluminu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.