Patent US5026893A successfully refreshed from Google Patents.
US5026893A
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Polysilahydrocarbon lubricants
Assignee: LUBRICATING SPECIALTIES COMPANY A CORP OF CA
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Filing: 1990-06-11
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Granted: 1991-06-25
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Expires: 2010-06-11
Abstract
Abstract Polysilahydrocarbons, such as tetrasilanes, are prepared by reaction of alkenyl organometallic compounds with alkyltrihalosilanes, followed by further reaction of the alkyltrialkenylsilane intermediates with trihalosilane and the subsequent substitution of the halogen atoms in the second intermediate by alkyl groups.
Inventors
- 👤 Kazimiera J. L. Paciorek
- 👤 Joseph G. Shih
- 👤 Bruce B. Randolph
- 👤 Carl E. Snyder, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:34
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0825; C07F7/0827; C07F7/0805; C10; C10M; C10M105/00; C10M105/76; C10M2227/00; C10M2227/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
58 words
A tetrasilahydrocarbon synthetic lubricant base stock having the general formula R.sub.1 --Si--R--Si(R.sub.2 R.sub.3 R.sub.4)].sub.3 wherein R 1 , R 2 , R 3 , and R 4 are alkyl groups having from one to 20 carbon atoms and mixtures thereof, and --R-- is an alkylene group, or mixture of alkylene groups, having from three to 10 carbon atoms.
Claim 2
Dependent Claim
58 words
A tetrasilahydrocarbon synthetic lubricant base stock having the general formula R.sub.1 --Si--R--Si(R.sub.2 R.sub.3 R.sub.4)].sub.3 wherein R 1 , R 2 , R 3 , and R 4 are alkyl groups having from one to 20 carbon atoms and mixtures thereof, and --R-- is an alkylene group, or mixture of alkylene groups, having from three to 10 carbon atoms.
Claim 3
Dependent Claim
17 words
The tetrasilahydrocarbon synthetic lubricant base stock of claim 1, wherein the alkyl and alkylene groups are unbranched.
Claim 4
Dependent Claim
32 words
The tetrasilahydrocarbon synthetic lubricant base stock of claim 1, wherein R 1 is n-octyl, R 2 , R 3 , and R 4 are all methyl, and the alkylene group is trimethylene.
Claim 5
Dependent Claim
31 words
The tetrasilahydrocarbon synthetic lubricant base stock of claim 1, wherein R 1 , R 2 , R 3 , and R 4 are all n-octyl, and the alkylene group is trimethylene.
Claim 6
Dependent Claim
32 words
The tetrasilahydrocarbon synthetic lubricant base stock of claim 1, wherein R 1 is n-octyl, R 2 , R 3 , and R 4 are all n-decyl, and the alkylene group is trimethylene.
Claim 7
Dependent Claim
32 words
The tetrasilahydrocarbon synthetic lubricant base stock of claim 1, wherein R 1 is n-octyl, R 2 , R 3 , and R 4 are all n-dodecyl, and the alkylene group is trimethylene.
Claim 8
Dependent Claim
55 words
A pentasilahydrocarbon synthetic lubricant base stock having the general formula Si--R--Si(R.sub.2 R.sub.3 R.sub.4 ].sub.4 wherein R 2 , R 3 , and R 4 are alkyl groups having from one to 20 carbon atoms, and mixtures thereof, and --R-- is an alkylene group, or mixture of alkylene groups, having from three to 10 carbon atoms.
Claim 9
Dependent Claim
55 words
A pentasilahydrocarbon synthetic lubricant base stock having the general formula Si--R--Si(R.sub.2 R.sub.3 R.sub.4 ].sub.4 wherein R 2 , R 3 , and R 4 are alkyl groups having from one to 20 carbon atoms, and mixtures thereof, and --R-- is an alkylene group, or mixture of alkylene groups, having from three to 10 carbon atoms.
Claim 10
Dependent Claim
122 words
A tetrasilahydrocarbon synthetic lubricant base stock prepared by the following steps: (a) reaction of an alkenyl organometallic reagent, the alkenyl group having from three to 10 carbon atoms, or mixtures of said alkenyl organometallic reagents with an alkyltrihalosilane, the alkyl group having from one to 20 carbon atoms, to form an intermediate alkyltrialkenylsilane; (b) condensation of the alkyltrialkenylsilane from Step (a) with a trihalosilane, wherein the halogen is either chlorine or bromine, in the presence of a catalyst to form alkyl-tris-[ω-(trihalosilyl)alkyl]silane; and (c) replacement of the halogen atoms in the product of Step (b) by alkyl groups, having from one to 20 carbon atoms, by treatment with an organometallic compound, or a mixture of organometallic compounds, to form the final alkyl-tris-[ω-(trialkylsilyl)alkyl]silane products.
Claim 11
Dependent Claim
122 words
A tetrasilahydrocarbon synthetic lubricant base stock prepared by the following steps: (a) reaction of an alkenyl organometallic reagent, the alkenyl group having from three to 10 carbon atoms, or mixtures of said alkenyl organometallic reagents with an alkyltrihalosilane, the alkyl group having from one to 20 carbon atoms, to form an intermediate alkyltrialkenylsilane; (b) condensation of the alkyltrialkenylsilane from Step (a) with a trihalosilane, wherein the halogen is either chlorine or bromine, in the presence of a catalyst to form alkyl-tris-[ω-(trihalosilyl)alkyl]silane; and (c) replacement of the halogen atoms in the product of Step (b) by alkyl groups, having from one to 20 carbon atoms, by treatment with an organometallic compound, or a mixture of organometallic compounds, to form the final alkyl-tris-[ω-(trialkylsilyl)alkyl]silane products.
Claim 12
Dependent Claim
24 words
A tetrasilahydrocarbon synthetic lubricant base stock according to claim 8 wherein said organometallic reagent comprises alkenylmagnesium halide Grignard reagents, dialkenylmagnesium compounds, and alkenyllithium compounds.
Claim 13
Dependent Claim
24 words
A tetrasilahydrocarbon synthetic lubricant base stock according to claim 9, wherein said process is carried out in a Grignard or organolithium reagent stable solvent.
Claim 14
Dependent Claim
19 words
A tetrasilahydrocarbon synthetic lubricant base stock according to claim 8 wherein said catalyst comprises hexachloroplatinic acid or platinum acetylacetonate.
Claim 15
Dependent Claim
33 words
A tetrasilahydrocarbon synthetic lubricant base stock according to claim 8 wherein said organometallic compound comprises alkyllithium compounds, alkylmagnesium halide Grignard reagents, dialkylmagnesium compounds, alkylsodium compounds, dialkylzinc compounds, and mixtures of said organometallic compounds.
Claim 16
Independent Claim
121 words
A method of preparing tetrasilahydrocarbon synthetic lubricant base stock comprising the following steps: (a) reacting an alkenyl organometallic reagent, the alkenyl group having from three to 10 carbon atoms, or mixtures of said alkenyl organometallic reagents with an alkyltrihalosilane, the alkyl group having from one to 20 carbon atoms, to form an intermediate alkyltrialkenylsilane; (b) condensing the alkyltrialkenylsilane from Step (a) with a trihalosilane, wherein the halogen is either chlorine or bromine, in the presence of a catalyst to form alkyl-tris-[ω-(trihalosilyl)alkyl]silane; and (c) replacing the halogen atoms in the product of Step (b) by alkyl groups, having from one to 20 carbon atoms, by treatment with an organometallic compound, or a mixture of organometallic compounds, to form the final alkyl-tris-[ω-(trialkylsilyl)alkyl]silane products.
Claim 17
Independent Claim
121 words
A method of preparing tetrasilahydrocarbon synthetic lubricant base stock comprising the following steps: (a) reacting an alkenyl organometallic reagent, the alkenyl group having from three to 10 carbon atoms, or mixtures of said alkenyl organometallic reagents with an alkyltrihalosilane, the alkyl group having from one to 20 carbon atoms, to form an intermediate alkyltrialkenylsilane; (b) condensing the alkyltrialkenylsilane from Step (a) with a trihalosilane, wherein the halogen is either chlorine or bromine, in the presence of a catalyst to form alkyl-tris-[ω-(trihalosilyl)alkyl]silane; and (c) replacing the halogen atoms in the product of Step (b) by alkyl groups, having from one to 20 carbon atoms, by treatment with an organometallic compound, or a mixture of organometallic compounds, to form the final alkyl-tris-[ω-(trialkylsilyl)alkyl]silane products.
Claim 18
Dependent Claim
19 words
The process of claim 13 wherein said organometallic reagent comprises alkenylmagnesium halide Grignard reagents, dialkenylmagnesium compounds, and alkenyllithium compounds.
Claim 19
Dependent Claim
19 words
The process of claim 14, wherein said process is carried out in a Grignard or organolithium reagent stable solvent.
Claim 20
Dependent Claim
14 words
The process of claim 13 wherein said catalyst comprises hexachloroplatinic acid or platinum acetylacetonate.
Claim 21
Dependent Claim
28 words
The process of claim 13 wherein said organometallic compound comprises alkyllithium compounds, alkylmagnesium halide Grignard reagents, dialkylmagnesium compounds, alkylsodium compounds, dialkylzinc compounds, and mixtures of said organometallic compounds.
References Cited (Backward Citations)
US2740802A
Cited
US4788312A
Cited
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