Patent US4413081A successfully refreshed from Google Patents.
US4413081A
Expired / Lapsed
US
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Polymer stabilization
Assignee: Phillips Petroleum Co
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Filing: 1983-02-01
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Granted: 1983-11-01
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Expires: 2003-02-01
Abstract
Abstract The heat stability of arylene sulfide polymers, such as poly(p-phenylene sulfide), is improved by the addition of cure retarders comprising Group 8 metal dihydrocarbyldithiocarbamates.
Inventors
- 👤 Ronald D. Mathis
- 👤 Jerry O. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/0091
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
A polymer composition exhibiting improved heat stability comprising a major amount of an arylene sulfide polymer containing a small effective stabilizing amount sufficient to retard polymer curing and cross-linking of at least one Group 8 metal dihydrocarbyldithiocarbamate.
Claim 2
Dependent Claim
37 words
A polymer composition exhibiting improved heat stability comprising a major amount of an arylene sulfide polymer containing a small effective stabilizing amount sufficient to retard polymer curing and cross-linking of at least one Group 8 metal dihydrocarbyldithiocarbamate.
Claim 3
Dependent Claim
11 words
An article of manufacture formed from the composition of claim 1.
Claim 4
Dependent Claim
11 words
A fiber or film formed from the composition of claim 1.
Claim 5
Dependent Claim
30 words
A composition according to claim 1 wherein the amount of stabilizer present ranges from about 0.01 to about 5 weight percent based on the weight of the arylene sulfide polymer.
Claim 6
Dependent Claim
25 words
A composition according to claim 4 wherein said arylene sulfide polymer is a poly(p-phenylene sulfide) having a melt flow of about 50 to about 400.
Claim 7
Dependent Claim
47 words
A composition according to claim 1 wherein said dithiocarbamate is represented by the formula ##STR3## wherein R 1 , R 2 , R 3 and R 4 individually represent hydrocarbyl groups having from 1 to about 20, inclusive, carbon atoms, and M is iron, nickel, or cobalt.
Claim 8
Dependent Claim
20 words
A composition according to claim 6 wherein said arylene sulfide polymer is poly(p-phenylene sulfide) and said dithiocarbamate is nickel dibutyldithiocarbamate.
Claim 9
Independent Claim
40 words
A method for improving the heat stability of poly(arylene sulfide) polymers which comprises incorporating therein a small effective stabilizing amount of a Group 8 metal dihydrocarbyldithiocarbamate which amount is sufficient to retard curing and cross-linking of said polymer during heating.
Claim 10
Independent Claim
40 words
A method for improving the heat stability of poly(arylene sulfide) polymers which comprises incorporating therein a small effective stabilizing amount of a Group 8 metal dihydrocarbyldithiocarbamate which amount is sufficient to retard curing and cross-linking of said polymer during heating.
Claim 11
Dependent Claim
28 words
A method according to claim 8 wherein the amount of said stabilizer ranges from about 0.01 to about 5 weight percent based on the weight of said polymer.
Claim 12
Dependent Claim
12 words
A process according to claim 8 wherein said polymer is poly(p-phenylene sulfide).
Claim 13
Dependent Claim
47 words
A method according to claim 11 wherein said dithiocarbamate is represented by the formula ##STR4## wherein R 1 , R 2 , R 3 and R 4 individually represent hydrocarbyl groups having from 1 to about 20, inclusive, carbon atoms, and M is iron, nickel, or cobalt.
Claim 14
Dependent Claim
20 words
A method according to claim 11 wherein said arylene sulfide polymer is poly(p-phenylene sulfide) and said dithiocarbamate is nickel dibutyldithiocarbamate.
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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) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |