US3887728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylchloride-alkylene copolymer and uses therefor
Assignee: Dynamit Nobel AG
•
Filing: 1973-02-09
•
Granted: 1975-06-03
•
Expires: 1993-02-09
Abstract
Abstract A copolymer of vinyl chloride with ethylene or propylene having a K-value of 45 to 65 and an alkylene (ethylene or propylene) content of 0.5 to 10 weight percent. This product is particularly useful for forming plasticizer-free coatings on substrates by known fluidized bed coating processes and for forming plasticizer-free shaped articles by rotational molding processes.
Inventors
- 👤 Wolfgang Looman
- 👤 Wolfgang Pungs
- 👤 Egon Bierwirth
- 👤 Robert Buning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:48
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/22; B05D1/24; C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06; B05D2506/00; B05D2506/20; B05D2507/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
IN THE PROCESS OF COATING A SUBSTRATE WITH A PLASTICIZERFREE VINYL CHLORIDE POLYMER COATING BY THE USE OF A FLUIDIZEDBED OF SINTERABLE POLYMER PARTICLES; THE IMPROVEMENT WITH COMPRISES UTILIZING AS COATING COMPOSITION A MOLDING COMPOSITION CONSISTING ESSENTIALLY OF 90 TO 99.5 WEIGHT PERCENT VINYL CHLORIDE AND 0.5 TO 10 WEIGHT PERCENT ETHYLENE OR PROPYLENE HAVING A K-VALUE OF 45 TO 65 AND HAVING A GRAIN SIZE OF ABOUT 0.04 TO 0.5 MM.
Claim 2
Dependent Claim
72 words
IN THE PROCESS OF COATING A SUBSTRATE WITH A PLASTICIZERFREE VINYL CHLORIDE POLYMER COATING BY THE USE OF A FLUIDIZEDBED OF SINTERABLE POLYMER PARTICLES; THE IMPROVEMENT WITH COMPRISES UTILIZING AS COATING COMPOSITION A MOLDING COMPOSITION CONSISTING ESSENTIALLY OF 90 TO 99.5 WEIGHT PERCENT VINYL CHLORIDE AND 0.5 TO 10 WEIGHT PERCENT ETHYLENE OR PROPYLENE HAVING A K-VALUE OF 45 TO 65 AND HAVING A GRAIN SIZE OF ABOUT 0.04 TO 0.5 MM.
Claim 3
Dependent Claim
72 words
In the process of coating a substrate with a plasticizer-free vinyl chloride polymer coating by the use of a fluidized-bed of sinterable polymer particles; the improvement with comprises utilizing as coating composition a molding composition consisting essentially of 90 to 99.5 weight percent vinyl chloride and 0.5 to 10 weight percent ethylene or propylene having a K-value of 45 to 65 and having a grain size of about 0.04 to 0.5 mm.
Claim 4
Dependent Claim
72 words
In the process of coating a substrate with a plasticizer-free vinyl chloride polymer coating by the use of a fluidized-bed of sinterable polymer particles; the improvement with comprises utilizing as coating composition a molding composition consisting essentially of 90 to 99.5 weight percent vinyl chloride and 0.5 to 10 weight percent ethylene or propylene having a K-value of 45 to 65 and having a grain size of about 0.04 to 0.5 mm.
Claim 5
Dependent Claim
21 words
The improved process claimed in claim 1 wherein said molding composition has a particle size of about 0.15 to 0.3 mm.
Claim 6
Dependent Claim
21 words
The improved process claimed in claim 1 wherein said molding composition has a particle size of about 0.2 to 0.3 mm.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein said copolymer is a copolymer of vinyl chloride and propylene.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |