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US4231909A Expired / Lapsed US ⏱️ 0.0 years remaining

Polychloropropylsiloxane plasticized polyvinyl chloride compositions

Assignee: Dow Silicones Corp
•
Filing: 1979-04-30
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Granted: 1980-11-04
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Expires: 1999-04-30
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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)

CA602400A Cited
GB691628A Cited
US3332900A Cited
US3428707A Cited
US3691257A Cited
US3686356A Cited
US3730931A Cited
JPS5188543A Cited

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

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