US3969307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding of poly(arylene sulfide) resins
Assignee: Phillips Petroleum Co
•
Filing: 1975-03-14
•
Granted: 1976-07-13
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Expires: 1995-03-14
Abstract
Abstract The discoloration of molded articles made from poly(arylene sulfide) resins is minimized or prevented by treating the molded article with water at an elevated temperature.
Inventors
- 👤 Charles W. Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:04
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J2381/00; C08J2381/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
In a method of molding an article from a poly(arylene sulfide) resin; the improvement which comprises incorporating a pigment in the resin and molding an article from the resulting resin at a mold temperature below about 200°F. and thereafter treating the molded article with water at a temperature of at least about 180°F. for a period of time sufficient to reduce darkening of the article.
Claim 2
Dependent Claim
65 words
In a method of molding an article from a poly(arylene sulfide) resin; the improvement which comprises incorporating a pigment in the resin and molding an article from the resulting resin at a mold temperature below about 200°F. and thereafter treating the molded article with water at a temperature of at least about 180°F. for a period of time sufficient to reduce darkening of the article.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said pigment is present in an amount within the range of 0.5 to 12 weight percent and the treating step is carried out for at least 20 minutes.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the article is treated with boiling water.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the article is treated with steam.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the resin has a filler incorporated therein.
Claim 7
Dependent Claim
11 words
The method of claim 5 wherein the filler comprises glass fibers.
Claim 8
Dependent Claim
39 words
A molded article formed from a poly(arylene sulfide) resin having a pigment incorporated therein, said article having been molded at a mold temperature below about 200°F. and thereafter treated with water at a temperature of at least about 180°F.
Claim 9
Dependent Claim
39 words
A molded article formed from a poly(arylene sulfide) resin having a pigment incorporated therein, said article having been molded at a mold temperature below about 200°F. and thereafter treated with water at a temperature of at least about 180°F.
References Cited (Backward Citations)
US3595952A
Cited
US3562199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |