Patent US3674853A successfully refreshed from Google Patents.
Patent US3970533A successfully refreshed from Google Patents.
US3970533A
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Process for conversion of elastomeric phosphazene
Assignee: Bridgestone Firestone Inc
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Filing: 1975-06-30
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Granted: 1976-07-20
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Expires: 1995-06-30
Abstract
Abstract Novel phosphonitrilic fluoroelastomers and compositions based on the same, possessing outstanding solvent resistance, low temperature flexibility and good physical strength over a broad range of service conditions are disclosed. The use of specific substituents in the side chains on the ¦ -P=N- ¦ backbone to adapt the elastomers to vulcanization with organic peroxides, sulfur-accelerator cure systems or radiation cure is disclosed. Particularly preferred substituents are the o-allyl phenoxy groups.
Inventors
- 👤 Gary Stephen Kyker
- 👤 Thomas Anthony Antkowiak
- 👤 Adel Farhan Halasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:31
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
Phosphonitrilic fluoroelastomer represented by the general formula: ##EQU7## wherein each of Q and Q' represent a fluoroalkoxy group represented by the formula --OCH 2 C n F 2n Z in which n is an integer from 1 to 10 and Z represents H or F; and Q and Q' are not required to be the same and there may be more than two such groups; and Q" represents an o-allylphenoxy group; the groups Q, Q' and Q" being randomly distributed along the --P=N--P=N-- chain.
Claim 2
Dependent Claim
84 words
Phosphonitrilic fluoroelastomer represented by the general formula: ##EQU7## wherein each of Q and Q' represent a fluoroalkoxy group represented by the formula --OCH 2 C n F 2n Z in which n is an integer from 1 to 10 and Z represents H or F; and Q and Q' are not required to be the same and there may be more than two such groups; and Q" represents an o-allylphenoxy group; the groups Q, Q' and Q" being randomly distributed along the --P=N--P=N-- chain.
Claim 3
Dependent Claim
15 words
The phosphonitrilic fluoroelastomers of claim 1 in which Q is -OCH 2 CF 3 .
Claim 4
Dependent Claim
35 words
The phosphonitrilic fluoroelastomers of claim 1 in which Q' is selected from the group consisting of --OCH 2 (CF 2 ) 3 CF 2 H and --OCH.sub. 2 (CF 2 ) 2 CF 3 .
Claim 5
Dependent Claim
35 words
The phosphonitrilic fluoroelastomer of claim 1 in which Q is --OCH 2 CF 3 ; Q' is --OCH 2 (CF 2 ) 3 CF 2 H; and Q" is --O--C 6 H 4 -- o-allyl.
Claim 6
Dependent Claim
30 words
The phosphonitrilic fluoroelastomers of claim 1 in which the relative proportions of Q" groups is between 0.1 and 5% and the total amount of Q and Q' groups exceed 95%.
Claim 7
Dependent Claim
9 words
The phosphonitrilic fluoroelastomers of claim 1 compounded and cured.
Claim 8
Dependent Claim
15 words
The phosphonitrilic fluoroelastomers of claim 6 wherein the compounded elastomer is cured by a peroxide.
Claim 9
Dependent Claim
16 words
The phosphonitrilic fluoroelastomers of claim 6 wherein the compounded elastomer is cured by a sulfur cure.
Claim 10
Dependent Claim
22 words
The phosphonitrilic fluoroelastomers of claim 6 compounded with a filler selected from the group consisting of carbon blacks, silicas and treated clays.
Claim 11
Dependent Claim
13 words
The phosphonitrilic fluoroelastomers of claim 6 cured by exposure to high energy radiation.
Claim 12
Dependent Claim
21 words
A composition comprising phosphonitrilic fluoroelastomers of claim 1, at least one filler and at least one curing agent for said elastomer.
Claim 13
Dependent Claim
20 words
The composition of claim 11 wherein the filler is selected from the group consisting of carbon blacks and inorganic oxides.
Claim 14
Dependent Claim
13 words
The composition of claim 11 wherein the curing agent is an organic peroxide.
Claim 15
Dependent Claim
12 words
The composition of claim 13 wherein the organic peroxide is dicumyl peroxide.
Claim 16
Dependent Claim
13 words
The composition of claim 11 wherein the curing agent is a sulfur compound.
Claim 17
Dependent Claim
12 words
The composition of claim 15 wherein the curing agent is mercapto benzothiazole.
Claim 18
Dependent Claim
25 words
The composition of claim 15 wherein the curing agent is a dialkyl dithiocarbamate, selected from the group consisting of dimethyl, diethyl, dipropyl and dibutyl dithiocarbamates.
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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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |