US6143360A
Expired / Lapsed
US
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Method for making nanoporous silicone resins from alkylydridosiloxane resins
Assignee: Dow Silicones Corp
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Filing: 1999-12-13
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Granted: 2000-11-07
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Expires: 2019-12-13
Abstract
Abstract 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.
Inventors
- 👤 Bianxiao Zhong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:56
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6921; H10P14/6922; C09; C09D; C09D183/00; C09D183/04; H10P14/63; H10P14/6326; H10P14/6342; H10P14/66; H10P14/668; H10P14/6681; H10P14/6684; H10P14/6686; H10P14/665
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
143 words
A method for forming a nanoporous silicon resin on a substrate comprising the steps of (A) forming an alkylhydridosiloxane resin by 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 alkyl group comprising about 8 to 28 carbon atoms and at least 45 percent of silicon atoms are substituted with at least one hydrogen atom, (B) coating on to a substrate the alkylhydridosiloxane resin, and (C) 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 of the alkylhydridosiloxane thereby forming a nanoporous silicone resin coating on the substrate.
Claim 2
Independent Claim
143 words
A method for forming a nanoporous silicon resin on a substrate comprising the steps of (A) forming an alkylhydridosiloxane resin by 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 alkyl group comprising about 8 to 28 carbon atoms and at least 45 percent of silicon atoms are substituted with at least one hydrogen atom, (B) coating on to a substrate the alkylhydridosiloxane resin, and (C) 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 of the alkylhydridosiloxane thereby forming a nanoporous silicone resin coating on the substrate.
Claim 3
Dependent Claim
85 words
A method according to claim 1 where the hydridosilicon containing resin is selected from the group of hydridosiloxane resins described by formulas (HSiO 3/2 ) n , (H 2 SiO) m , and (HSiO 3/2 ) x (H 2 SiO) y , where n is within a range of about 100 to 1000, m is within a range of about 100 to 1000, x and y are each an integer of one or greater, and x+y is within a range of about 100 to 1000.
Claim 4
Dependent Claim
31 words
A method according to claim 1 where the hydridosilicon containing resin is described by formula (HSiO 3/2 ) n , where n is within a range of about 100 to 1000.
Claim 5
Dependent Claim
20 words
A method according to claim 1, where the 1-alkene is a branched 1-alkene comprising about 8 to 28 carbon atoms.
Claim 6
Dependent Claim
20 words
A method according to claim 1, where the 1-alkene is selected from the group consisting of 1-dodecene, 1-eicosene, and 3,7,11,15-tetramethyl-1-hexadecen-3-ol.
Claim 7
Dependent Claim
31 words
A method according to claim 1, where the mole ratio of the 1-alkene to silicon-bonded hydrogen atoms in the hydridosilicon containing resin is within a range of about 0.05:1 to 0.7:1.
Claim 8
Dependent Claim
31 words
A method according to claim 1, where the mole ratio of the 1-alkene to silicon-bonded hydrogen atoms in the hydridosilicon containing resin is within a range of about 0.1 to 0.5:1.
Claim 9
Dependent Claim
52 words
A method according to claim 1, where about 10 to 25 percent of the silicon atoms of the alkylhydridosiloxane resin are substituted with at least one alkyl group comprising about 8 to 28 carbon atoms and at least 70 percent of the silicon atoms are substituted with at least one hydrogen atom.
Claim 10
Dependent Claim
18 words
A method according to claim 1, where the heating of step (B) is conducted in an inert atmosphere.
Claim 11
Dependent Claim
36 words
A method according to claim 1, where the thermolysis of alkyl substituents comprising about 8 to 28 carbon atoms is conducted at a temperature within a range of greater than 350° C. to about 600° C.
Claim 12
Dependent Claim
33 words
A method according to claim 1, where the thermolysis of alkyl substituents comprising about 8 to 28 carbon atoms is conducted at a temperature within a range of 400° C. to 550° C.
Claim 13
Dependent Claim
11 words
A nanoporous silicon resin prepared by the method of claim 1.
Claim 14
Dependent Claim
15 words
A substrate having a nanoporous silicone resin coating prepared by the method of claim 1.
Claim 15
Dependent Claim
16 words
An electronic component having a nanoporous silicone resin coating prepared by the method of claim 1.
Claim 16
Independent Claim
88 words
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.
Claim 17
Independent Claim
88 words
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.
Claim 18
Independent Claim
114 words
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.
Claim 19
Independent Claim
114 words
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.
References Cited (Backward Citations)
US3159601A
Cited
US3220972A
Cited
US3296291A
Cited
US3419593A
Cited
US3516946A
Cited
US3615272A
Cited
US3928629A
Cited
US3989668A
Cited
US4756977A
Cited
US4814730A
Cited
US5010159A
Cited
US5036117A
Cited
US5063267A
Cited
US5776990A
Cited
US5494859A
Cited
JPH10287746A
Cited
WO1998047941A1
Cited
WO1998047944A1
Cited
WO1998047945A1
Cited
WO1998049721A1
Cited
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