US3626031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl halide polymer stabilized with partial ester salt of maleic anhydride-vinyl compound polymer
Assignee: Atlantic Richfield Co
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Filing: 1968-06-04
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Granted: 1971-12-07
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Expires: 1988-06-04
Abstract
Abstract Novel tin salts of partial esters of vinyl monomermal anhydride polymers, (e.g. styrene-maleic anhydride polymers), esterified with a thioalcohol or a hydroxythioether are formed by combination of the ammonium salt of said thioester and stannous chloride. Vinyl halide polymers are stabilized by incorporation of small amounts of these tin salts.
Inventors
- 👤 Robert R Chambers
- 👤 Henry V Isaacson
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08L; C08L27/00; C08L27/02; C08L35/00; C08L35/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
A stabilized vinyl halide resin composition of claim 1 wherein said vinyl monomer is styrene.
Claim 2
Dependent Claim
16 words
A stabilized vinyl halide resin composition of claim 2 wherein said polymer is esterified with tertoctylmercaptan.
Claim 3
Dependent Claim
28 words
A stabilized vinyl halide resin composition having incorporated therein from about .01 to 5 percent by weight of the tin salt of the esterified polymer of claim 2.
Claim 4
Dependent Claim
13 words
A stabilized vinyl halide resin composition of claim 2 wherein R is alkyl.
Claim 5
Dependent Claim
24 words
A stabilized vinyl halide resin composition of claim 5 wherein the molar ratio of styrene to maleic anhydride in said polymer is approximately 1:1.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |