Patent US4383080A successfully refreshed from Google Patents.
US4383080A
Expired / Lapsed
US
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Process for curing poly(arylene sulfides)
Assignee: Phillips Petroleum Co
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Filing: 1982-04-05
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Granted: 1983-05-10
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Expires: 2002-04-05
Abstract
Abstract A poly(arylene sulfide) polymer is cured in the presence of an ozone containing gas thereby reducing the time required for the curing process.
Inventors
- 👤 Robert L. Dupree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:58
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0286; C08G75/0295; C08J2381/00; C08J2381/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
In a process for curing a poly(arylene sulfide) resin the improvement which comprises curing said poly(arylene sulfide) resin at a temperature below the melting point of said resin in the presence of an ozone containing gas wherein ozone is present in an amount to effect an increase in the cure rate of said poly(arylene) resin.
Claim 2
Dependent Claim
55 words
In a process for curing a poly(arylene sulfide) resin the improvement which comprises curing said poly(arylene sulfide) resin at a temperature below the melting point of said resin in the presence of an ozone containing gas wherein ozone is present in an amount to effect an increase in the cure rate of said poly(arylene) resin.
Claim 3
Dependent Claim
34 words
A process according to claim 1 wherein said poly(arylene sulfide) resin is cured at a temperature in the range of from about 25° to 125° F. below the melting point of said poly(arylene) resin.
Claim 4
Dependent Claim
27 words
A process according to claim 1 wherein said ozone containing gas is an oxygen containing gas selected from the group consisting of air and O 2 .
Claim 5
Dependent Claim
13 words
A process according to claim 1 wherein said ozone containing gas is air.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein said poly(arylene sulfide) resin is poly(phenylene sulfide).
Claim 7
Dependent Claim
62 words
In a process for curing a poly(arylene sulfide) resin the improvement which comprises curing said poly(arylene sulfide) resin at a temperature below the melting point of said resin in the presence of an ozone containing gas wherein the amount of ozone employed is in the range of from about 0.02 to about 50.0 weight percent based on the weight of said gas.
Claim 8
Dependent Claim
62 words
In a process for curing a poly(arylene sulfide) resin the improvement which comprises curing said poly(arylene sulfide) resin at a temperature below the melting point of said resin in the presence of an ozone containing gas wherein the amount of ozone employed is in the range of from about 0.02 to about 50.0 weight percent based on the weight of said gas.
Claim 9
Dependent Claim
33 words
A process according to claim 6 wherein said poly(arylene sulfide) resin is cured at a temperature in the range from about 25° to 125° F. below the melting point of said poly(arylene sulfide).
Claim 10
Dependent Claim
27 words
A process according to claim 7 wherein said resin is cured for a period of time in the range of about 10 minutes to about 40 hours.
Claim 11
Dependent Claim
27 words
A process according to claim 6 wherein said ozone containing gas is an oxygen containing gas selected from the group consisting of air and O 2 .
Claim 12
Dependent Claim
13 words
A process according to claim 6 wherein said oxygen containing gas is air.
Claim 13
Dependent Claim
14 words
A process according to claim 6 wherein said poly(arylene sulfide) resin is poly(phenylene sulfide).
References Cited (Backward Citations)
US3793256A
Cited
US4251575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |