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US4269992A
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Preparation of hydrolyzable polysiloxane-polyoxyalkylene block copolymers
Assignee: OSI Specialties Inc
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Filing: 1977-12-28
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Granted: 1981-05-26
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Expires: 1997-12-28
Abstract
Abstract Hydrolyzable polysiloxane-polyoxyalkylene block copolymers are provided by refluxing a reaction mixture containing: (a) a polydihydrocarbonsiloxane comprising units of the formula R2SiO, wherein R is a monovalent hydrocarbon group, and containing at least one halogen group bonded directly to at least one silicon atom of the polydihydrocarbonsiloxane, (b) a polyoxyalkylene alcohol, and (c) a solvent selected from the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25 DEG C. to about 130 DEG C., in order to effect the reaction of (a) and (b) in (c) to prepare the block copolymers. In a further aspect of the invention, the reaction mixture may also contain: (d) a catalyst selected from the group consisting of sulfamic acid and pyridinium bisulfate. The resulting block copolymers are useful in the production of cellular polyurethanes.
Inventors
- 👤 Carl J. Litteral
- 👤 David L. Mullins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/46
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
131 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydihydrocarbonsiloxane comprising units of the formula R 2 SiO, wherein R is a monovalent hydrocarbon group, and containing at least one halogen group bonded directly to at least one silicon atom of the polydihydrocarbonsiloxane, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class cnsisting of alkyl, alkenyl, aryl and aralkyl radicals, and (c) a solvent selected form the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
Claim 2
Dependent Claim
131 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydihydrocarbonsiloxane comprising units of the formula R 2 SiO, wherein R is a monovalent hydrocarbon group, and containing at least one halogen group bonded directly to at least one silicon atom of the polydihydrocarbonsiloxane, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class cnsisting of alkyl, alkenyl, aryl and aralkyl radicals, and (c) a solvent selected form the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the halogen is chlorine.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the polyoxyalkylene alcohol is a poly(oxypropylene-oxyethylene) alcohol.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein the solvent is alkyl halide.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein the alkyl halide is 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the solvent is an alkenyl halide.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein the alkenyl halide is allyl chloride.
Claim 9
Dependent Claim
11 words
The process of claim 6 wherein the alkenyl halide is 3-chloro-2-methylpropene.
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein the reaction mixture also contains: (d) a catalyst selected from the group consisting of sulfamic acid and pyridinium bisulfate in a catalytically effective amount.
Claim 11
Dependent Claim
11 words
The process of claim 9 wherein the catalyst is sulfamic acid.
Claim 12
Dependent Claim
11 words
The process of claim 9 wherein the catalyst is pyridinium bisulfate.
Claim 13
Dependent Claim
188 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydihydrocarbonsiloxane comprising units of the formula: (RSiO.sub.1.5).sub.a (R.sub.2 SiO).sub.b (RXSiO).sub.c (XR.sub.2 SiO.sub.0.5).sub.d (R.sub.3 SiO.sub.0.5).sub.3 wherein a ranges from 0 to about 10 mole percent, b ranges from about 50 to about 95 mole percent, c ranges from 0 to about 25 mole percent, d ranges from 0 to about 50 mole percent, and e ranges from 0 to about 25 mole percent, based upon said polydihydrocarbonsiloxane, with the proviso that c+d≧5 mole percent; R is a monovalent hydrocarbon group free of aliphatic carbon to carbon multiple bonds; and X is halogen, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class consisting of alkyl, alkenyl, aryl and aralkyl radicals, and (c) a solvent selected from the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
Claim 14
Dependent Claim
188 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydihydrocarbonsiloxane comprising units of the formula: (RSiO.sub.1.5).sub.a (R.sub.2 SiO).sub.b (RXSiO).sub.c (XR.sub.2 SiO.sub.0.5).sub.d (R.sub.3 SiO.sub.0.5).sub.3 wherein a ranges from 0 to about 10 mole percent, b ranges from about 50 to about 95 mole percent, c ranges from 0 to about 25 mole percent, d ranges from 0 to about 50 mole percent, and e ranges from 0 to about 25 mole percent, based upon said polydihydrocarbonsiloxane, with the proviso that c+d≧5 mole percent; R is a monovalent hydrocarbon group free of aliphatic carbon to carbon multiple bonds; and X is halogen, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class consisting of alkyl, alkenyl, aryl and aralkyl radicals, and (c) a solvent selected from the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
Claim 15
Dependent Claim
9 words
The process of claim 12 wherein X is chlorine.
Claim 16
Dependent Claim
142 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydimethylsiloxane comprising units of the formula: (MeSiO.sub.1.5).sub.a (Me.sub.2 SiO).sub.b (ClMe.sub.2 SiO.sub.0.5).sub.f wherein a ranges from 0 to about 10 mole percent, b ranges from about 50 to about 95 mole percent, and f ranges from 5 to about 50 mole percent based upon said polydimethylsiloxane, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class consisting of alkyl, alkenyl, aryl and aralkyl radcicals, and (c) a solvent selected from the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
Claim 17
Dependent Claim
142 words
A process for producing a hydrolyzable polysiloxane-polyoxyalkylene block copolymer which comprises refluxing a reaction mixture containing: (a) a polydimethylsiloxane comprising units of the formula: (MeSiO.sub.1.5).sub.a (Me.sub.2 SiO).sub.b (ClMe.sub.2 SiO.sub.0.5).sub.f wherein a ranges from 0 to about 10 mole percent, b ranges from about 50 to about 95 mole percent, and f ranges from 5 to about 50 mole percent based upon said polydimethylsiloxane, (b) a polyoxyalkylene alcohol of the formula: HO(C.sub.n H.sub.2n O).sub.v Y wherein n has a value of 2 or 3, v is an integer of from about 5 to about 200, and Y is a terminal group selected from the class consisting of alkyl, alkenyl, aryl and aralkyl radcicals, and (c) a solvent selected from the group consisting of alkyl halides and alkenyl halides having boiling points at atmospheric pressure of from about 25° C. to about 130° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |