US4130675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyarylene sulfide resin coating method
Assignee: EIDP Inc
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Filing: 1977-11-28
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Granted: 1978-12-19
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Expires: 1997-11-28
Abstract
Abstract The discoloration of finishes derived from coating compositions containing polyarylene sulfide resin can be significantly reduced by applying to the substrate a citrate, carbonate, sulfate or hydroxide of an alkali metal prior to applying the polyarylene sulfide resin composition.
Inventors
- 👤 Eustathios Vassiliou
- 👤 Edward J. Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C09; C09D; C09D181/00; C09D181/02; C08; C08K; C08K3/00; C08K3/18; C08K3/30; C08K5/00; C08K5/04; C08K5/09; C08L; C08L27/00; C08L27/02; C08L27/12; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A process for producing light colored coatings of polyarylene sulfide resin which are produced by polyarylene sulfide resin coating compositions; the process comprising (a) placing upon a substrate a modifying compound which is a citrate, carbonate, sulfate or hydroxide of sodium, potassium, rubidium, or cesium; (b) overcoating with a polyarylene sulfide resin composition; and then (c) heating until the polyarylene sulfide resin is fused.
Claim 2
Dependent Claim
64 words
A process for producing light colored coatings of polyarylene sulfide resin which are produced by polyarylene sulfide resin coating compositions; the process comprising (a) placing upon a substrate a modifying compound which is a citrate, carbonate, sulfate or hydroxide of sodium, potassium, rubidium, or cesium; (b) overcoating with a polyarylene sulfide resin composition; and then (c) heating until the polyarylene sulfide resin is fused.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein the coating composition comprises (a) 100 parts by weight polyarylene sulfide resin; (b) 0-1250 parts by weight pigment; (c) 0-1900 parts by weight fluorocarbon polymer; and (d) liquid carrier.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the modifying compound composition contains potassium citrate, sodium carbonate, potassium chloride, rubidium carbonate, cesium sulfate, or potassium hydroxide.
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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |