US3755252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked articles and coatings of vinyl chloride polymers and process for their manufacture
Assignee: Dynamit Nobel AG
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Filing: 1971-09-13
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Granted: 1973-08-28
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Expires: 1991-09-13
Abstract
Abstract A process for cross-linking a vinyl chloride polymer which comprises mixing a non-cross-linked vinyl chloride-silane copolymer with an acid catalyst and heating, if necessary. The compositions produced by this process are useful as coatings, fibers or sheets.
Inventors
- 👤 R Buning
- 👤 S Frick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:58
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
Process of claim 1 wherein the catalyst is hydrochloric acid generated by cleaving from the vinyl chloride copolymer by light or high-energy radiation.
Claim 2
Dependent Claim
36 words
Process of claim 1 wherein said vinyl chloride-silane copolymer is copolymerized with other monomers selected from the group of vinyl esters, fumaric esters, maleic esters, itaconic esters, vinylidene chloride, acrylonitrile, methacrylonitrile, acrylates, vinyl fluoride, and olefins.
Claim 3
Dependent Claim
25 words
Process of claim 1 wherein said copolymer contains 30 to 99.5 weight percent vinyl chloride copolymerized with 0.5 to 10 weight percent of said silane.
Claim 4
Dependent Claim
11 words
Process of claim 1 wherein the vinyl chloride-silane copolymer is syndiotactic.
Claim 5
Dependent Claim
18 words
Process of claim 1 wherein said mixing takes place in the presence of a solvent or swelling agent.
Claim 6
Dependent Claim
18 words
Process of claim 1 wherein said mixing takes place in the presence of a plasticizer for the polymer.
Claim 7
Dependent Claim
32 words
Composition comprising a uniformly cross-linked vinyl chloride-silane copolymer containing 30 to 99.9 weight percent vinyl chloride copolymerized with 0.1 to 20 weight percent silane and characterized by structural units having the formula
Claim 8
Dependent Claim
11 words
Composition of claim 8 wherein the vinyl chloride-silane copolymer is syndiotactic.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |