US4116785A
Expired / Lapsed
US
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Phosphonitrilic polymers with curability by sulfur accelerated cures or radiation cures
Assignee: Bridgestone Firestone Inc
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Filing: 1976-02-27
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Granted: 1978-09-26
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Expires: 1996-02-27
Abstract
Abstract Improvements in phosphonitrilic polymers and compositions based on the same, possessing outstanding low temperature flexibility and good physical strength over a broad range of service conditions, are obtained by the incorporation of some unsaturated substituents in the side chains on the --P=N-- backbone, to adapt the polymers to vulcanization with sulfur accelerated cure systems or radiation cure.
Inventors
- 👤 Tai Chun Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:49
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/28; C08G; C08G79/00; C08G79/02; C08G79/025; C08L; C08L85/00; C08L85/02; C08J2385/00; C08J2385/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
Sulfur cured non-fluorinated linear polyphosphazenes represented by the general formula ##STR2## in which Q, Q' and Q" represent monovalent groups randomly distributed along the --P═N-- backbone, each of Q and Q' being free from flourine and being selected from the group consisting of alkoxy and aryloxy, both substituted and unsubstituted, and Q" being a group with olefin unsaturation, the amount of Q" being between 0.1 and 5% of the total of Q, Q' and Q".
Claim 2
Dependent Claim
75 words
Sulfur cured non-fluorinated linear polyphosphazenes represented by the general formula ##STR2## in which Q, Q' and Q" represent monovalent groups randomly distributed along the --P═N-- backbone, each of Q and Q' being free from flourine and being selected from the group consisting of alkoxy and aryloxy, both substituted and unsubstituted, and Q" being a group with olefin unsaturation, the amount of Q" being between 0.1 and 5% of the total of Q, Q' and Q".
Claim 3
Dependent Claim
32 words
The sulfur cured polyphosphazenes of claim 1 wherein Q" is a group represented by O--R--R' in which R is alkylene or arylene and R' is a group which contains some olefinic unsaturation.
Claim 4
Dependent Claim
11 words
The sulfur cured polyphosphazenes of claim 1 wherein Q" is orthoallylphenoxy.
Claim 5
Dependent Claim
10 words
Sulfur cured polyphosphazenes produced by the process of claim 1.
Claim 6
Dependent Claim
46 words
A process of curing polyphosphazenes represented by the general formula ##STR3## wherein Q, Q', and Q" are as defined in claim 1 which comprises compounding said polymer with between 0.25 and 5.0 parts of sulfur for each 100 parts of polymer and curing the resulting composition.
Claim 7
Dependent Claim
89 words
A process of curing non-fluorinated linear polyphosphazenes represented by the general formula ##STR4## in which Q, Q' and Q" represent monovalent groups randomly distributed along the --P═N-- backbone, each of Q and Q' being free from fluorine and being selected from the group consisting of alkoxy and aryloxy, both substituted and unsubstituted, and Q" being a group with olefinic unsaturation, the amount of Q" being between 0.1 and 5% of the total of Q, Q' and Q", which comprises exposing said polymer to a dose of high energy radiation.
Claim 8
Dependent Claim
89 words
A process of curing non-fluorinated linear polyphosphazenes represented by the general formula ##STR4## in which Q, Q' and Q" represent monovalent groups randomly distributed along the --P═N-- backbone, each of Q and Q' being free from fluorine and being selected from the group consisting of alkoxy and aryloxy, both substituted and unsubstituted, and Q" being a group with olefinic unsaturation, the amount of Q" being between 0.1 and 5% of the total of Q, Q' and Q", which comprises exposing said polymer to a dose of high energy radiation.
Claim 9
Dependent Claim
20 words
The process of claim 6 wherein the dose of radiation is between 1 and 15 megarads of high energy electrons.
Claim 10
Dependent Claim
11 words
The radiation cured polyphosphazene produced by the process of claim 6.
Claim 11
Dependent Claim
17 words
The polyphosphazenes of claim 1 wherein at least one of Q and Q' is a phenoxy group.
Claim 12
Dependent Claim
23 words
The polyphosphazenes of claim 9 wherein Q is a phenoxy group and Q' is an alkoxy group selected from methoxy, ethoxy and amyloxy.
Claim 13
Dependent Claim
10 words
The polyphosphazenes of claim 9 wherein Q is p-ethyl phenoxy.
Claim 14
Dependent Claim
11 words
The polyphosphazenes of claim 9 wherein Q is m-cresoxy or p-cresoxy.
Claim 15
Dependent Claim
21 words
The polyphosphazenes of claim 1 wherein Q and Q' are alkoxy selected from the group consisting of methoxy, ethoxy and amyloxy.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |