US4041015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt viscosity stabilizers for vinyl chloride polymers
Assignee: Arkema Inc
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Filing: 1975-06-27
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Granted: 1977-08-09
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Expires: 1995-06-27
Abstract
Abstract The melt viscosity of vinyl chloride polymers is effectively stabilized using linear polysulfides containing specified elements or organic radicals as terminal groups on the chains of sulfur atoms.
Inventors
- 👤 William A. Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:13
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/30; C01; C01B; C01B17/00; C01B17/42; C01B17/43; C01F; C01F7/00; C01F7/68; C01F7/70; C01G; C01G1/00; C01G1/12; C01G30/00; C01G30/008; C07; C07C; C07C327/00; C08K5/00; C08K5/36; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A method for stabilizing the melt viscosity of vinyl chloride polymer compositions said method consisting essentially of incorporating into said composition between 0.1 and 10%, based on the weight of the vinyl chloride polymer, of a linear polysulfide of the general formula A x (S z ) y wherein each A is individually selected from the group consisting of elements exhibiting an atomic weight of between 6.9 and 209, inclusive and a valence v, the elements being in turn selected from groups I-A, I-B, II-A, II-B, III-A, IV-B, V-A, VI-B, VII-B and VIII of the periodic table, tin and lead, wherein x is 1 when v is even and x is 2 when v is odd, y is 1 when v is 1 or 2, y is 2 when v is 4 and y is equal to v when v is 3 or 5, and z is an integer between 3 and 8, inclusive.
Claim 2
Independent Claim
154 words
A method for stabilizing the melt viscosity of vinyl chloride polymer compositions said method consisting essentially of incorporating into said composition between 0.1 and 10%, based on the weight of the vinyl chloride polymer, of a linear polysulfide of the general formula A x (S z ) y wherein each A is individually selected from the group consisting of elements exhibiting an atomic weight of between 6.9 and 209, inclusive and a valence v, the elements being in turn selected from groups I-A, I-B, II-A, II-B, III-A, IV-B, V-A, VI-B, VII-B and VIII of the periodic table, tin and lead, wherein x is 1 when v is even and x is 2 when v is odd, y is 1 when v is 1 or 2, y is 2 when v is 4 and y is equal to v when v is 3 or 5, and z is an integer between 3 and 8, inclusive.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein each A represents the element calcium, sodium, barium, magnesium, aluminum, lead, antimony or manganese.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the vinyl chloride polymer is a homopolymer or a copolymer of vinyl chloride with propylene, ethylene or vinyl acetate.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |