US4231909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polychloropropylsiloxane plasticized polyvinyl chloride compositions
Assignee: Dow Silicones Corp
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Filing: 1979-04-30
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Granted: 1980-11-04
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Expires: 1999-04-30
Abstract
Abstract A plasticized polyvinyl chloride composition consisting essentially of polyvinyl chloride resin and a polysiloxane fluid containing at least 10 mole percent of 3-chloropropyl functional siloxane units is described. The compositions have increased flexibility and reduced tendency to exude silicone to the surface.
Inventors
- 👤 Frederick W. G. Fearon
- 👤 Gary A. Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A plasticized polyvinyl chloride composition consisting essentially of a blend of (A) 88 to 99.9 percent by weight of polyvinyl chloride resin and (B) 0.1 to 12 percent by weight of a siloxane plasticizer which is a polysiloxane fluid containing at least 10 mole percent of chloropropylsiloxane units such that siloxane (B) is not exuded from the blend of (A) and (B), the chloropropylsiloxane units consisting essentially of units of the general formula ##EQU3## wherein n equals zero, one or two and any remaining siloxane units consisting essentially of units of the general formula ##EQU4## wherein each R is independently selected from the group consisting of methyl radicals and phenyl radicals and m equals one, two, or three.
Claim 2
Dependent Claim
118 words
A plasticized polyvinyl chloride composition consisting essentially of a blend of (A) 88 to 99.9 percent by weight of polyvinyl chloride resin and (B) 0.1 to 12 percent by weight of a siloxane plasticizer which is a polysiloxane fluid containing at least 10 mole percent of chloropropylsiloxane units such that siloxane (B) is not exuded from the blend of (A) and (B), the chloropropylsiloxane units consisting essentially of units of the general formula ##EQU3## wherein n equals zero, one or two and any remaining siloxane units consisting essentially of units of the general formula ##EQU4## wherein each R is independently selected from the group consisting of methyl radicals and phenyl radicals and m equals one, two, or three.
Claim 3
Dependent Claim
16 words
A composition as defined in claim 1 wherein the siloxane plasticizer consists essentially of chloropropylmethylsiloxane units.
Claim 4
Dependent Claim
20 words
A composition as defined in claim 1 wherein 1 to 10 percent by weight of the siloxane plasticizer is employed.
References Cited (Backward Citations)
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Cited
GB691628A
Cited
US3332900A
Cited
US3428707A
Cited
US3691257A
Cited
US3686356A
Cited
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JPS5188543A
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |