US3880794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride plastisol composition
Assignee: Zeon Corp
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Filing: 1973-08-24
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Granted: 1975-04-29
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Expires: 1993-08-24
Abstract
Abstract Polyvinyl chloride plastisol compositions containing as gelling agents cyclic acetals which are polyhydric alcohol acetals of benzaldehyde are disclosed.
Inventors
- 👤 Eiichi Iida
- 👤 Toshio Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575; C08K5/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A POLYVINYL CHLORIDE PLASTISOL COMPOSITION WHICH COMPRISES A MIXTURE OF POLYVINYL CHLORIDE RESIN AND A PLASTICIZER TOGETHER WITH A CYCLIC ACETAL, AS GELLING AGENT, SAID CYCLIC ACETAL BEING SELECTED FROM THE GROUP CONSISTING OF DIBENZYLIDENE XYLITOL, DIBENZYLIDENE-SORBITOL AND DERIVATIVES THEREOF WHEREIN THE BENZENE RING IS SUBSTITUTED WITH HALOGEN, AN ALKYL GROUP OF 1-8 CARBON ATOMS OR AN ALKOXY GROUP OF 1-8 CARBON ATOMS, THE AMOUNT OF SAID CYCLIC ACETAL BEING 0.02-1% BY WEIGHT BASED ON THE WEIGHT OF THE MIXTURE OF THE POLYVINYL CHLORIDE RESIN AND THE PLASTICIZER.
Claim 2
Dependent Claim
88 words
A POLYVINYL CHLORIDE PLASTISOL COMPOSITION WHICH COMPRISES A MIXTURE OF POLYVINYL CHLORIDE RESIN AND A PLASTICIZER TOGETHER WITH A CYCLIC ACETAL, AS GELLING AGENT, SAID CYCLIC ACETAL BEING SELECTED FROM THE GROUP CONSISTING OF DIBENZYLIDENE XYLITOL, DIBENZYLIDENE-SORBITOL AND DERIVATIVES THEREOF WHEREIN THE BENZENE RING IS SUBSTITUTED WITH HALOGEN, AN ALKYL GROUP OF 1-8 CARBON ATOMS OR AN ALKOXY GROUP OF 1-8 CARBON ATOMS, THE AMOUNT OF SAID CYCLIC ACETAL BEING 0.02-1% BY WEIGHT BASED ON THE WEIGHT OF THE MIXTURE OF THE POLYVINYL CHLORIDE RESIN AND THE PLASTICIZER.
Claim 3
Dependent Claim
13 words
The composition of claim 1, wherein said cyclic acetal, is dibenzylydene-xylytol or dibenzylydenesorbitol.
Claim 4
Dependent Claim
25 words
The composition of claim 1, wherein the amount of plasticizer is 40-600 parts by weight per 100 parts by weight of the polyvinyl chloride resin.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein the amount of the plasticizer is 600-2,000 parts by weight of the polyvinyl chloride composition.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |