US4237263A
Expired / Lapsed
US
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Poly(monoalkyl group containing organophosphazenes) and method for their preparation
Assignee: Bridgestone Firestone Inc
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Filing: 1979-05-21
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Granted: 1980-12-02
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Expires: 1999-05-21
Abstract
Abstract Poly(organophosphazenes) containing one alkyl group per each three repeating units are prepared. These polymers are represented by the structure: ##STR1## wherein R is alkyl containing from 1 to 10 carbon atoms; wherein X is selected from the group consisting of chlorine and --OR' radicals in which R' is the same as R or is selected from the group consisting of substituted alkyl radicals and substituted or unsubstituted aryl radicals and wherein n is from 3 to 15,000. Polymers of the above structure in which X is chlorine are prepared by thermally polymerizing a monoalkyl-pentachloro-cyclotriphosphazene having the formula N 3 P 3 Cl 5 R in which R is as defined above. Polymers of the above structure in which X is an --OR' radical as defined above are prepared by thermally polymerizing the monoalkyl-pentachloro-cyclotriphosphazene and then reacting the resultant linear polymer with a suitable alkali metal alkoxide or aryloxide.
Inventors
- 👤 Harry R. Allcock
- 👤 Robert J. Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:07
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A polyphosphazene polymer containing units represented by the structure: ##STR6## wherein R is alkyl containing from 1 to 10 carbon atoms; wherein X is selected from the group consisting of chlorine and --OR' radicals in which R' is the same as R or is selected from the group consisting of substituted alkyl radicals and substituted or unsubstituted aryl radicals and wherein n is from 3 to 15,000.
Claim 2
Dependent Claim
67 words
A polyphosphazene polymer containing units represented by the structure: ##STR6## wherein R is alkyl containing from 1 to 10 carbon atoms; wherein X is selected from the group consisting of chlorine and --OR' radicals in which R' is the same as R or is selected from the group consisting of substituted alkyl radicals and substituted or unsubstituted aryl radicals and wherein n is from 3 to 15,000.
Claim 3
Dependent Claim
15 words
The polyphosphazene polymer of claim 1 wherein R is CH 3 and X is Cl.
Claim 4
Dependent Claim
19 words
The polyphosphazene polymer of claim 1 wherein R is CH 3 and X is --OCH 2 CF 3 .
Claim 5
Independent Claim
60 words
A method of preparing polyphosphazene polymers containing units represented by the structure: ##STR7## wherein R is alkyl containing from 1 to 10 and n is from 3 to 15,000, said method comprising thermally polymerizing a compound having the structure: ##STR8## wherein R is alkyl containing from 1 to 10 carbon atoms, at temperatures of from about 210° to 250° C.
Claim 6
Independent Claim
60 words
A method of preparing polyphosphazene polymers containing units represented by the structure: ##STR7## wherein R is alkyl containing from 1 to 10 and n is from 3 to 15,000, said method comprising thermally polymerizing a compound having the structure: ##STR8## wherein R is alkyl containing from 1 to 10 carbon atoms, at temperatures of from about 210° to 250° C.
Claim 7
Dependent Claim
14 words
The method of claim 4 wherein R in said compound is CH 3 .
Claim 8
Independent Claim
145 words
A method of preparing polyphosphazene polymers containing units represented by the structure: ##STR9## wherein R is alkyl containing from 1 to 10 carbon atoms wherein R' is R or is selected from the group consisting of substituted alkyl radicals and substituted or unsubstituted aryl radicals and wherein n is from 3 to 15,000; said method comprising the steps of: (a) thermally polymerizing a compound having the structure: ##STR10## wherein R is alkyl containing from 1 to 10 carbon atoms, at the temperature of 210° to 250° C. to thereby form a linear polymer having the structure: ##STR11## wherein n is from 3 to 15,000; and (b) reacting said linear polymer with a compound having the formula MOR' in which M is an alkali metal selected from the group consisting of Na, K and Li and R' is a substituted or unsubstituted alkyl or aryl radical.
Claim 9
Independent Claim
145 words
A method of preparing polyphosphazene polymers containing units represented by the structure: ##STR9## wherein R is alkyl containing from 1 to 10 carbon atoms wherein R' is R or is selected from the group consisting of substituted alkyl radicals and substituted or unsubstituted aryl radicals and wherein n is from 3 to 15,000; said method comprising the steps of: (a) thermally polymerizing a compound having the structure: ##STR10## wherein R is alkyl containing from 1 to 10 carbon atoms, at the temperature of 210° to 250° C. to thereby form a linear polymer having the structure: ##STR11## wherein n is from 3 to 15,000; and (b) reacting said linear polymer with a compound having the formula MOR' in which M is an alkali metal selected from the group consisting of Na, K and Li and R' is a substituted or unsubstituted alkyl or aryl radical.
Claim 10
Dependent Claim
18 words
The method of claim 6 wherein R is CH 3 and OR' is --OCH 2 CF 3 .
References Cited (Backward Citations)
US3169933A
Cited
DE2712542A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |