US4221904A
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US
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Polyphosphazene copolymers containing substituents derived from pyruvate esters
Assignee: Bridgestone Firestone Inc
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Filing: 1978-09-08
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Granted: 1980-09-09
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Expires: 1998-09-08
Abstract
Abstract Polyphosphazene copolymers are prepared which contain randomly distributed units represented by the formulas: ##STR1## wherein X is ##STR2## in which R is alkyl containing from 1 to 12 carbon atoms or aryl, wherein X' is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20≦(a+b+c)≦50,000 per polymer. The copolymers of the invention can be utilized to form solvent resistant films and may also be utilized in applications for moldings, coatings and the like. Additionally, the copolymers may be utilized as crosslinking agents for other reactive monomers or polymers. An especially useful feature of these copolymers is that they can be cured or crosslinked at room temperature.
Inventors
- 👤 William L. Hergenrother
- 👤 Adel F. Halasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:51
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A polyphosphazene copolymer containing randomly distributed units represented by the formulas: ##STR13## wherein X is ##STR14## in which R is alkyl containing from 1 to 12 carbon atoms or aryl, wherein X' is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20≦(a+b+c)≦50,000 per polymer.
Claim 2
Dependent Claim
53 words
A polyphosphazene copolymer containing randomly distributed units represented by the formulas: ##STR13## wherein X is ##STR14## in which R is alkyl containing from 1 to 12 carbon atoms or aryl, wherein X' is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20≦(a+b+c)≦50,000 per polymer.
Claim 3
Dependent Claim
11 words
The copolymer of claim 1 wherein X' is a fluoroalkoxy group.
Claim 4
Dependent Claim
16 words
The copolymer of claim 1 wherein X is ##STR15## in which R is ethyl or methyl.
Claim 5
Dependent Claim
9 words
The copolymer of claim 1 wherein X' is trifluoroethoxy.
Claim 6
Dependent Claim
17 words
The copolymer of claim 1 wherein X is ##STR16## and X' is --OCH 2 CF 3 .
Claim 7
Independent Claim
123 words
A method of preparing polyphosphazene copolymers containing randomly distributed units represented by the formulas: ##STR17## wherein X is ##STR18## in which R is alkyl containing from 1 to 12 carbon atoms or aryl, wherein X' is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20≦(a+b+c)≦50,000 per polymer; which method comprises reacting a polydichlorophosphazene polymer having the formula --(NPCl 2 ) n --, wherein n is from 20 to 50,000 with a pyruvate ester having the formula CH 3 COCOOR in which R is alkyl containing from 1 to 12 carbon atoms or aryl and an aliphatic alcohol, aromatic alcohol, amino compound or mercaptan compound, or mixtures thereof, in the presence of a tertiary amine.
Claim 8
Independent Claim
123 words
A method of preparing polyphosphazene copolymers containing randomly distributed units represented by the formulas: ##STR17## wherein X is ##STR18## in which R is alkyl containing from 1 to 12 carbon atoms or aryl, wherein X' is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20≦(a+b+c)≦50,000 per polymer; which method comprises reacting a polydichlorophosphazene polymer having the formula --(NPCl 2 ) n --, wherein n is from 20 to 50,000 with a pyruvate ester having the formula CH 3 COCOOR in which R is alkyl containing from 1 to 12 carbon atoms or aryl and an aliphatic alcohol, aromatic alcohol, amino compound or mercaptan compound, or mixtures thereof, in the presence of a tertiary amine.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein said pyruvate ester is ethyl pyruvate.
Claim 10
Dependent Claim
12 words
The method of claim 6 wherein said pyruvate ester is methyl pyruvate.
Claim 11
Dependent Claim
18 words
The method of claim 6 wherein said pyruvate ester is ethyl pyruvate and said aliphatic alcohol is trifluoroethanol.
Claim 12
Dependent Claim
18 words
The method of claim 6 wherein said pyruvate ester is methyl pyruvate and said aliphatic alcohol is trifluoroethanol.
Claim 13
Dependent Claim
12 words
The method of claim 6 wherein said tertiary amine is triethyl amine.
Claim 14
Dependent Claim
22 words
The method of claim 6 wherein said pyruvate ester is ethyl pyruvate, said alcohol is trifluoroethanol and said tertiary amine is triethylamine.
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |