Patent US3036593A successfully refreshed from Google Patents.
US4010221A
Expired / Lapsed
US
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Polyvinyl chloride/copolyester compositions
Assignee: Shell USA Inc
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Filing: 1974-11-29
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Granted: 1977-03-01
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Expires: 1994-11-29
Abstract
Abstract There is disclosed compatible, homogeneous blends comprised of from 90 to 10 percent by weight, based on the total weight of the blend of an essentially unplasticized polyvinyl chloride having an intrinsic viscosity ranging from 0.6 to 1.0 and from 10 to 90 percent by weight, based on the total weight of the blend, of an essentially noncrystallizable copolyester having an intrinsic viscosity ranging from 0.5 to 1.10 and a softening point ranging from 70 DEG C. to 220 DEG C.
Inventors
- 👤 Charles J. Gebhart
- 👤 Clyde E. Gleim
- 👤 Maria V. Wiener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:23
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L67/00; C08L67/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31794; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
Compatible and homogeneous blends comprised of (A) from 90 to 10 percent by weight, based on the total weight of the blend, of an essentially unplasticized polyvinyl chloride having an intrinsic viscosity ranging from 0.60 to 1.0 as measured in cyclohexane at 30° C. and (B) from 10 to 90 percent by weight, based on the total weight of the blend, of an essentially noncrystallizable copolyester having an intrinsic viscosity ranging from 0.50 to 1.10 and a softening point ranging from 70° C. to 220° C., said copolyesters being prepared from the reaction of dicarboxylic acids selected from the group consisting of aliphatic and aromatic dicarboxylic acids or the lower alkyl esters thereof with glycols selected from the group consisting of alkylene glycols containing from 2 to 10 carbon atoms and ethers thereof, cycloalkylene glycols, hydroxyalkylene derivatives of bisphenol A and hydroxy alkylene derivatives of diphenols.
Claim 2
Dependent Claim
146 words
Compatible and homogeneous blends comprised of (A) from 90 to 10 percent by weight, based on the total weight of the blend, of an essentially unplasticized polyvinyl chloride having an intrinsic viscosity ranging from 0.60 to 1.0 as measured in cyclohexane at 30° C. and (B) from 10 to 90 percent by weight, based on the total weight of the blend, of an essentially noncrystallizable copolyester having an intrinsic viscosity ranging from 0.50 to 1.10 and a softening point ranging from 70° C. to 220° C., said copolyesters being prepared from the reaction of dicarboxylic acids selected from the group consisting of aliphatic and aromatic dicarboxylic acids or the lower alkyl esters thereof with glycols selected from the group consisting of alkylene glycols containing from 2 to 10 carbon atoms and ethers thereof, cycloalkylene glycols, hydroxyalkylene derivatives of bisphenol A and hydroxy alkylene derivatives of diphenols.
Claim 3
Dependent Claim
50 words
The blends of claim 1 wherein the essentially unplasticized polyvinyl chloride polymer has an intrinsic viscosity ranging from 0.65 to 0.80 and the essentially noncrystallizable copolyester has an intrinsic viscosity ranging from 0.60 to 0.80 and wherein said copolyester has a softening point ranging from 150° C. to 190° C.
Claim 4
Dependent Claim
45 words
The blends of claim 1 wherein the polyvinyl chloride polymer comprises from 80 to 55 percent by weight, based on the total weight of the blend, and the copolyester comprises from 20 to 45 percent by weight, based on the total weight of the blend.
Claim 5
Dependent Claim
45 words
The blends of claim 1 wherein the polyvinyl chloride polymer comprises from 45 to 20 percent by weight, based on the total weight of the blend, and the copolyester comprises from 55 to 80 percent by weight based on the total weight of the blend.
Claim 6
Dependent Claim
34 words
The compatible and homogeneous blends of claim 1 wherein the essentially noncrystallizable copolyester is selected from the group consisting of poly(ethylene terephthalate/sebacate), poly(tetramethylene terephthalate/isophthalate), poly(hexamethylene terephthalate/isophthalate), poly(ethylene/neopentyl terephthalate), poly(tetramethylene terephthalate/isophthalate/sebacate), poly(ethylene/neopentyl-terephthalate/sebacate), poly(ethylene/neopentyl-terephthalate/isophthalate) and poly(ethylene/neopentyl-terephthalate/isophthalate/sebacate).
Claim 7
Dependent Claim
12 words
The blends of claim 1 in the form of an oriented fiber.
Claim 8
Dependent Claim
12 words
The blends of claim 1 in the form of a molded article.
Claim 9
Dependent Claim
11 words
The blends of claim 1 in the form of an adhesive.
Claim 10
Dependent Claim
13 words
The blends of claim 1 in the form of film, ribbon and tape.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |