US4421910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer stabilization
Assignee: Phillips Petroleum Co
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Filing: 1982-09-24
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Granted: 1983-12-20
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Expires: 2002-09-24
Abstract
Abstract The curing of arylene sulfide polymers is accelerated by the addition of an effective amount of at least one metal salt of dihydrocarbyldithiophosphinic acid.
Inventors
- 👤 Ronald D. Mathis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
40 words
A polymer composition exhibiting increase melt viscosity when subjected to heat comprising a poly(arylene sulfide) polymer containing a finite, but small effective amount, sufficient to promote polymer curing and cross-linking of at least one metal salt of dihydrocarbyl dithiophosphinic acid.
Claim 2
Dependent Claim
40 words
A polymer composition exhibiting increase melt viscosity when subjected to heat comprising a poly(arylene sulfide) polymer containing a finite, but small effective amount, sufficient to promote polymer curing and cross-linking of at least one metal salt of dihydrocarbyl dithiophosphinic acid.
Claim 3
Dependent Claim
74 words
A composition according to claim 1 wherein said metal salt has the formula ##STR3## where M is a metal selected from among copper, zinc, chromium, manganese, cobalt and nickel, n is the valence of M, and R, R' are the same or different hydrocarbyl radicals containing from 1 to about 20 carbon atoms, preferably from about 4 to about 12 carbon atoms, selected from among alkyl, cycloalkyl, aryl and combinations thereof such as alkaryl.
Claim 4
Dependent Claim
14 words
A composition according to claim 2 wherein said salt is cobalt or zinc dicyclohexyldithiophosphinate.
Claim 5
Dependent Claim
11 words
An article of manufacture formed from the composition of claim 1.
Claim 6
Dependent Claim
10 words
A molded article formed from the composition of claim 1.
Claim 7
Dependent Claim
29 words
A composition according to claim 1 wherein the amount of metal salt present ranges from about 0.2 to about 5 weight percent based on the weight of said polymer.
Claim 8
Dependent Claim
22 words
A composition according to claim 6 wherein said polymer is poly(p-phenylene sulfide) having a melt flow of about 20 to about 400.
Claim 9
Dependent Claim
21 words
A composition according to claim 1 wherein said polymer is poly(p-phenylene sulfide) and said metal salt is cobalt or zinc dicyclohexyldithiophosphinate.
Claim 10
Independent Claim
41 words
A method for increasing the melt viscosity of poly(arylene sulfide) polymers which comprises incorporating therein an effective amount of at least one metal salt of dihydrocarbyldithiophosphinic acid which amount is sufficient to promote curing and cross-linking of said polymer during heating.
Claim 11
Independent Claim
41 words
A method for increasing the melt viscosity of poly(arylene sulfide) polymers which comprises incorporating therein an effective amount of at least one metal salt of dihydrocarbyldithiophosphinic acid which amount is sufficient to promote curing and cross-linking of said polymer during heating.
Claim 12
Dependent Claim
29 words
A method according to claim 9 wherein the amount of said metal salt ranges from about 0.2 to about 5 weight percent based on the weight of said polymer.
Claim 13
Dependent Claim
14 words
A process according to claim 9 wherein said arylene sulfide polymer is poly(p-phenylene sulfide).
Claim 14
Dependent Claim
53 words
A method according to claim 9 wherein said metal salt has the formula ##STR4## where M is a metal selected from among copper, zinc, chromium, manganese, cobalt and nickel, n is the valence of M, and R, R' are the same or different hydrocarbyl radicals containing from 1 to about 20 carbon atoms.
Claim 15
Dependent Claim
21 words
A method according to claim 9 wherein said polymer is poly(p-phenylene sulfide) and said metal salt is cobalt or zinc dicyclohexyldithiophosphinate.
Claim 16
Dependent Claim
22 words
A method according to claim 9 wherein said polymer is poly(p-phenylene sulfide) having a melt flow of about 20 to about 400.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |