Silicone foams
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
Oct 16, 1990
filing date -
Oct 23, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to silicone foams. It concerns a silicone foam composition consisting of two or more components, the said composition being capable of rapid cure at 20.degree. C. on mixing its components, to give a foamed mass having a density of less than 200 kg/m.sup.3, characterised in that it comprises (A) one or more polysiloxanes having at least three alkylhydrogensiloxane units per molecule, (B) one or more polydiorganosiloxanes having at least two siloxane units of the formula ##EQU1## in which R represents a monovalent hydrocarbon group containing from 1 to 20 carbon atoms, Q represents a hydroxylated alkylene or alkoxylene chain, a has a value of 0, 1 or 2 and the value of b is 1 or 2 and c is a platinum catalyst for promoting the reaction between the components. Useful for the production of medical dressings.
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