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US 6,143,360 AGranted
Method for making nanoporous silicone resins from alkylydridosiloxane resins
AssigneeDow Corning Corporation
InventorBianxiao Zhong
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AssigneeDow Corning Corporation
InventorBianxiao Zhong
Estimating the term…
A method for preparing a nanoporous silicone resin which can be used to form low dielectric constant films useful for electrical insulating coatings on electronic devices comprising (A) contacting a hydridosilicon containing resin with a 1-alkene comprising about 8 to 28 carbon atoms in the presence of a platinum group metal-containing hydrosilation catalyst effecting formation of an alkylhydridosiloxane resin where at least 5 percent of silicon atoms are substituted with at least one group comprising about 8 to 28 carbon atoms and at least 45 percent of silicon atoms are substituted with at least one hydrogen atom and (B) heating the alkylhydridosiloxane resin of step (A) at a temperature sufficient to effect curing and thermolysis of alkyl groups comprising about 8 to 28 carbon atoms from the silicon atoms thereby forming a nanoporous silicone resin.
A method for forming a nanoporous silicon resin on a substrate comprising the steps of
A method for preparing a nanoporous silicone resin comprising heating an alkyihydridosiloxane resin where at least 5 percent of silicon atoms are substituted with at least one alkyl group comprising about 8 to 28 carbon atoms, at least 45 percent of the silicon atoms are bonded to hydrogen atoms, and the remaining bonds of the silicon atoms are bonded to oxygen atoms at a temperature sufficient to effect curing and thermolysis of the alkyl substituents comprising about 8 to 28 carbon atoms thereby forming a nanoporous silicone resin.
A method for preparing a nanoporous silicon resin coating on a substrate comprising the steps of (A) coating on to a substrate an alkylhydridosiloxane resin where at least 5 percent of silicon atoms are substituted with at least one alkyl group comprising about 8 to 28 carbon atoms, at least 45 percent of the silicon atoms are bonded to hydrogen atoms, and the remaining bonds of the silicon atoms are bonded to oxygen atoms, and (B) heating the coated substrate to a temperature sufficient to effect curing of the alkylhydridosiloxane resin coating and thermolysis of alkyl groups comprising about 8 to 28 carbon atoms thereby forming a nanoporous silicon resin coating on the substrate.
Dependencies are inferred from the claim text.