US4839451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for the preparation of polysilylenes
Assignee: Xerox Corp
•
Filing: 1988-04-04
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Granted: 1989-06-13
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Expires: 2008-04-04
Abstract
Abstract A process for the preparation of high weight average molecular weight polysilylenes which comprises (1) simultaneously adding an alkali metal and a dihalodisubstituted silane monomer to a solvent; (2) heating the aforementioned mixture, followed by cooling; and (3) subsequently separating the product therefrom.
Inventors
- 👤 Santokh S. Badesha
- 👤 Milan Stolka
- 👤 Kathleen M. McGrane
- 👤 Ronald J. Weagley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:32
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0754; C; C08; C08G; C08G77/00; C08G77/60
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
58 words
A process for the preparation of high weight average molecular weight polysilylenes which comprises (1) simultaneously adding an alkali metal and a monomer selected from the group consisting of dihalodialkyl silane monomers, dihalodiaryl silane monomers, and dihaloarylalkyl silane monomers to an inert solvent; (2) heating the aforementioned mixture, followed by cooling; and (3) subsequently separating the product therefrom.
Claim 2
Dependent Claim
58 words
A process for the preparation of high weight average molecular weight polysilylenes which comprises (1) simultaneously adding an alkali metal and a monomer selected from the group consisting of dihalodialkyl silane monomers, dihalodiaryl silane monomers, and dihaloarylalkyl silane monomers to an inert solvent; (2) heating the aforementioned mixture, followed by cooling; and (3) subsequently separating the product therefrom.
Claim 3
Dependent Claim
93 words
A process for the preparation of high weight average molecular weight polysilylenes with a weight average molecular weight of from about 100,000 to about 2,000,000 which comprises (1) simultaneously adding an alkali metal or a dispersion of an alkali metal in an organic solvent and a monomer seelcted from the group consisting of dihalodialkyl silane monomers, dihalodiaryl silane monomers, and dihaloarylalkyl silane monomers to an organic solvent; (2) heating the aforementioned mixture to a temperature of from about 50° to about 120° C., followed by cooling; and (3) subsequently separating the product therefrom.
Claim 4
Dependent Claim
93 words
A process for the preparation of high weight average molecular weight polysilylenes with a weight average molecular weight of from about 100,000 to about 2,000,000 which comprises (1) simultaneously adding an alkali metal or a dispersion of an alkali metal in an organic solvent and a monomer seelcted from the group consisting of dihalodialkyl silane monomers, dihalodiaryl silane monomers, and dihaloarylalkyl silane monomers to an organic solvent; (2) heating the aforementioned mixture to a temperature of from about 50° to about 120° C., followed by cooling; and (3) subsequently separating the product therefrom.
Claim 5
Dependent Claim
58 words
A process in accordance with claim 2 wherein the dihalo silane monomer is selected from the group consisting of dichlorophenyl methyl silane, dimethyl dichloro silane, diethyl dichloro silane, diphenyl dichloro silane, phenyl ethyl dichloro silane, tolyl methyl dichloro silane, cyclohexyl methyl dichloro silane, phenethyl methyl dichloro silane, cyclohexyl ethyl dichloro silane, dichlorocyclohexylmethyl silane, and propyl methyl dichloro silane.
Claim 6
Dependent Claim
15 words
A process in accordance with claim 2 wherein the alkali metal is sodium, or potassium.
Claim 7
Dependent Claim
14 words
A process in accordance with claim 2 wherein the dispersion contains a mineral oil.
Claim 8
Dependent Claim
23 words
A process in accordance with claim 2 wherein the solvent is selected from the group consisting of toluene, benzene, xylene, and mixtures thereof.
Claim 9
Dependent Claim
36 words
A process in accordance with claim 2 wherein the silane monomer is present in an amount of about 1 mole and the alkali metal is sodium and is present in an amount of about 2 moles.
Claim 10
Dependent Claim
69 words
A process in accordance with claim 2 wherein the polysilylene is of the formula ##STR3## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, substituted aryl, and alkoxy; and m, n, and p are numbers that reflect the percentage of the monomer unit in the total polymer compound.
Claim 11
Dependent Claim
13 words
A process in accordance with claim 2 wherein the polysilylene is poly(methylphenyl silylene).
Claim 12
Dependent Claim
13 words
A process in accordance with claim 2 wherein the polysilylene is poly(n-propylmethyl silylene).
Claim 13
Dependent Claim
16 words
A process in accordance with claim 1 wherein there is obtained monomodal high molecular weight polysilylene.
Claim 14
Dependent Claim
23 words
A process in accordance with claim 1 wherein the weight average molecular weight of the polysilylene is from about 100,000 to about 2,000,000.
Claim 15
Dependent Claim
14 words
A process in accordance with claim 1 wherein the silane is a dihalodialkyl monomer.
Claim 16
Dependent Claim
14 words
A process in accordance with claim 1 wherein the silane is a dihaloarylalkyl silane.
Claim 17
Dependent Claim
17 words
A process in accordance with claim 13 wherein alkyl contains from 1 to about 25 carbon atoms.
Claim 18
Dependent Claim
17 words
A process in accordance with claim 14 wherein aryl contains from 6 to about 24 carbon atoms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |