US3994844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl halide resin compositions containing zinc organic phosphites
Assignee: Henkel Corp
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Filing: 1975-11-28
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Granted: 1976-11-30
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Expires: 1995-11-28
Abstract
Abstract Novel hindered zinc organic phosphites are produced by the reaction of zinc carboxylic acid salts and organic phosphites. The hindered zinc organic phosphites are excellent sources for zinc in vinyl halide resin stabilizers to prevent resin degradation by heat and light. Vinyl halide resin compositions containing the hindered zinc organic phosphites in relatively large amounts of divalent zinc can be processed under elevated temperatures over extended periods of time without undergoing catastrophic degradation.
Inventors
- 👤 Philip H. Rhodes
- 👤 Robert L. Ahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A heat stabilized vinyl halide resin composition comprising a vinyl halide resin and, as the heat stabilizer in an effective amount, a hindered zinc organic phosphite having the formula selected from the group consisting of ##EQU2## where R' is alkyl, aryl, aralkyl, or alkaryl with the proviso that at least one R' is aryl or alkaryl and where R" is aryl or alkaryl.
Claim 2
Dependent Claim
63 words
A heat stabilized vinyl halide resin composition comprising a vinyl halide resin and, as the heat stabilizer in an effective amount, a hindered zinc organic phosphite having the formula selected from the group consisting of ##EQU2## where R' is alkyl, aryl, aralkyl, or alkaryl with the proviso that at least one R' is aryl or alkaryl and where R" is aryl or alkaryl.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein R' or R" has from about C 6 to about C 25 atoms.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the aryl group of said aryl or alkaryl is phenyl.
Claim 5
Dependent Claim
27 words
The composition of claim 1 wherein said effective amount of phosphite provides from about 0.0001 to about 0.5 parts of divalent zinc per 100 parts of resin.
Claim 6
Dependent Claim
12 words
The composition of claim 1 which additionally contains a carboxylic acid ester.
Claim 7
Dependent Claim
17 words
The composition of claim 5 wherein said carboxylic acid contains about C 2 -C 54 carbon atoms.
Claim 8
Dependent Claim
13 words
The composition of claim 6 wherein the carboxylic acid is a fatty acid.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein said vinyl halide resin is polyvinyl chloride.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |