Silicone resins

A silicone resin, curable to a resin of low coefficient of thermal expansion, high glass transition temperature and high modulus, has the empirical formula (R3SiO1/2)a(R2SiO2/2)b(RSiO3/2)c(SiO4/2)d wherein each R is a hydrocarbon or substituted hydrocarbon group or a hydrogen atom; and a=0.02 to 0.8...

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Bibliographic Details
Main Authors DUPONT ANNE, LEE YEONG JOO, CHEVALIER PIERRE MAURICE, OU DUAN LI, ROBSON STEVEN
Format Patent
LanguageEnglish
Published 16.09.2008
Subjects
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
SPRAYING OR ATOMISING IN GENERAL
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
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Summary:A silicone resin, curable to a resin of low coefficient of thermal expansion, high glass transition temperature and high modulus, has the empirical formula (R3SiO1/2)a(R2SiO2/2)b(RSiO3/2)c(SiO4/2)d wherein each R is a hydrocarbon or substituted hydrocarbon group or a hydrogen atom; and a=0.02 to 0.8; b=0 to 0.4; and c+d=0.2 to 0.98, where a+b+c+d=1.0, characterized in that at least 2 mole % of the siloxane units in the resin are of the formula R'SiO1/2, RR'2SiO1/2 or R'2SiO2/2, wherein each R' is an alkenyl group.
Bibliography:Application Number: US20050531163