Patent US3666735A successfully refreshed from Google Patents.
US3666735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving plasticizer absorption of polyvinyl halides
Assignee: BARDEN Inc
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Filing: 1968-09-04
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Granted: 1972-05-30
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Expires: 1988-09-04
Abstract
Abstract This invention relates to a method for improving the plasticizer absorption qualities of a polyvinyl halide. More particularly, this invention relates to a method as aforesaid wherein a monomeric vinyl halide is polymerized in suspension in the presence of a mineral oil having a boiling point above about 200* C.
Inventors
- 👤 Constantine Rosis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:24
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
The process according to claim 1 wherein said mineral oil is present in an amount of from about 0.1 part to about 2 parts by weight for each 100 parts by weight of monomer.
Claim 2
Dependent Claim
12 words
The process according to claim 2 wherein said monomer is vinyl chloride.
Claim 3
Dependent Claim
24 words
The process according to claim 3 wherein said mineral oil is liquid petrolatum having a viscosity of from about 45 to about 350 SSU.
Claim 4
Dependent Claim
23 words
The process according to claim 4 wherein the reaction mixture is heated to a temperature between about 30* C. to about 95* C.
Claim 5
Dependent Claim
58 words
The process according to claim 1 wherein the monomer consists of at least about 50 percent vinyl chloride and the mineral oil is refined liquid petrolatum having a viscosity of from about 70 to about 280 SSU present in an amount of about 0.25 part to about 1 part by weight for each 100 parts by weight monomer.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |