US3888948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride type resins
Assignee: Dynamit Nobel AG
•
Filing: 1972-05-09
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Granted: 1975-06-10
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Expires: 1992-05-09
Abstract
Abstract Polyvinylchloride polymers having a high impact strength are produced by dissolving in vinyl chloride, polymer of ethylene and vinyl acetate or polymer of ethylene and acrylic acid esters, and polymerizing the vinyl chloride-polymer mixture.
Inventors
- 👤 Peter Pinten
- 👤 Hans Naubereit
- 👤 Werner Trautvetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:01
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
IN THE PRODUCTION OF RESINS OF THE POLYCINYL CHLORIDE CLASS, THE IMPROVEMENT WHICH COMPRISES DISSOLVING POLYMER OF ETHYLENE AND ACRYLIC ACID ESTER IN A MEDIUM CONSISTING ESSENTIALLY OF VINYL CHLORIDE AND POLYMERIZING VINYL CHLORIDE, THE ESTER MOIETY IN SAID POLYMER BEING ABOUT 35-50% BY WEIGHT OF THE POLYMER, AND SAID POLYMER DISSOLVED IN SAID MEDIUM BEING ABOUT 5-40% BY WEIGHT OF THE POLYMER-VINYL CHLORIDE MIXTURE.
Claim 2
Dependent Claim
65 words
IN THE PRODUCTION OF RESINS OF THE POLYCINYL CHLORIDE CLASS, THE IMPROVEMENT WHICH COMPRISES DISSOLVING POLYMER OF ETHYLENE AND ACRYLIC ACID ESTER IN A MEDIUM CONSISTING ESSENTIALLY OF VINYL CHLORIDE AND POLYMERIZING VINYL CHLORIDE, THE ESTER MOIETY IN SAID POLYMER BEING ABOUT 35-50% BY WEIGHT OF THE POLYMER, AND SAID POLYMER DISSOLVED IN SAID MEDIUM BEING ABOUT 5-40% BY WEIGHT OF THE POLYMER-VINYL CHLORIDE MIXTURE.
Claim 3
Dependent Claim
97 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in a mixture of vinyl chloride and monomer selected from the group consisting of vinyl acetate, acrylic acid esters and maleic acid esters, the proportion of said monomer in said mixture being about 5- 20% by weight of the mixture, the ester moiety in said polymer being about 35- 50% by weight thereof, said polymer being about 5- 40% by weight of the combined weight of polymer and the mixture of vinyl chloride and monomer.
Claim 4
Dependent Claim
97 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in a mixture of vinyl chloride and monomer selected from the group consisting of vinyl acetate, acrylic acid esters and maleic acid esters, the proportion of said monomer in said mixture being about 5- 20% by weight of the mixture, the ester moiety in said polymer being about 35- 50% by weight thereof, said polymer being about 5- 40% by weight of the combined weight of polymer and the mixture of vinyl chloride and monomer.
Claim 5
Dependent Claim
19 words
Process according to claim 1, wherein said polymer is about 5- 15% by weight of the polymer-vinyl chloride mixture.
Claim 6
Dependent Claim
28 words
Process according to claim 2, wherein said polymer is about 5- 15% by weight of the combined weight of polymer and the mixture of vinyl chloride and monomer.
Claim 7
Dependent Claim
30 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in vinyl chloride and polymerizing the vinyl chloride.
Claim 8
Dependent Claim
30 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in vinyl chloride and polymerizing the vinyl chloride.
Claim 9
Dependent Claim
68 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in a mixture of vinyl chloride and monomer selected from the group consisting of vinyl acetate, acrylic acid esters, and maleic acid esters, the proportion of said monomer in said mixture being about 5-20% by weight of said mixture, and polymerizing the monomer and vinyl chloride.
Claim 10
Dependent Claim
68 words
In the production of resins of the polyvinyl chloride class, the improvement which comprises dissolving polymer of ethylene and acrylic acid ester in a mixture of vinyl chloride and monomer selected from the group consisting of vinyl acetate, acrylic acid esters, and maleic acid esters, the proportion of said monomer in said mixture being about 5-20% by weight of said mixture, and polymerizing the monomer and vinyl chloride.
Claim 11
Dependent Claim
18 words
Process according to claim 1, wherein said polymer is a polymer of ethylene and acrylic acid ethyl ester.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |