US4016350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of vinyl chloride in free space surrounding polyvinyl chloride powder
Assignee: Goodyear Tire and Rubber Co
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Filing: 1975-11-20
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Granted: 1977-04-05
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Expires: 1995-11-20
Abstract
Abstract The invention relates to the reduction of the amount of vinyl chloride monomer in the free space surrounding polyvinyl chloride powder by incorporating in the powder a material which will react with vinyl chloride monomer and allowing it to react with and reduce the amount of vinyl chloride monomer present.
Inventors
- 👤 Edwin Studley Smith
- 👤 Richard A. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/006; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
The method of reducing the monomeric vinyl chloride in the free space surrounding polyvinyl chloride resin powder which comprises mixing polyvinyl chloride powder with 0.4 or more parts per 100 parts of said polyvinyl chloride powder of a reactive material selected from the group consisting of p-toluenesulfonic acid, octadecyl thioglycolate and octadecyl 3-mercaptopropionate.
Claim 2
Independent Claim
53 words
The method of reducing the monomeric vinyl chloride in the free space surrounding polyvinyl chloride resin powder which comprises mixing polyvinyl chloride powder with 0.4 or more parts per 100 parts of said polyvinyl chloride powder of a reactive material selected from the group consisting of p-toluenesulfonic acid, octadecyl thioglycolate and octadecyl 3-mercaptopropionate.
Claim 3
Dependent Claim
16 words
The method of claim 1 in which the vinyl chloride reactive material is in molten state.
Claim 4
Dependent Claim
22 words
The method of claim 1 in which the polyvinyl chloride powder is mixed with a solution of the vinyl chloride reactive material.
Claim 5
Dependent Claim
19 words
The method of claim 1 in which a polyvinyl chloride powder is encapsulated in a vinyl chloride reactive material.
Claim 6
Dependent Claim
22 words
The method of claim 1 in which the polyvinyl chloride powder is stored in the presence of the vinyl chloride reactive material.
Claim 7
Dependent Claim
15 words
The method of claim 1 in which the vinyl chloride reactive material is octadecyl 3-mercaptopropionate.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |