Patent US4727114A successfully refreshed from Google Patents.
US4727114A
Expired / Lapsed
US
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Chlorosulfonated polyethylene blends
Assignee: EIDP Inc
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Filing: 1987-05-26
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Granted: 1988-02-23
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Expires: 2007-05-26
Abstract
Abstract It has been found that if two different chlorosulfonated polyethylenes, each with its own specific selected chlorine and sulfur content range, are blended with polyvinyl chloride, the resulting three-phase blend has good oil resistance and low temperature toughness.
Inventors
- 👤 John C. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:31
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/32; C08L23/34; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A blend comprising a mixture of (a) 30-70 weight percent of (a), (b) and (c) of polyvinyl chloride, (b) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 40-52 weight percent and a sulfur content of 0.2-5 weight percent in the polymer, and (c) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 24-40 weight percent and a sulfur content of 0.2-5 weight percent in the polymer; with the proviso that the chlorine content of the chlorosulfonated polyethylene of components (b) and (c) differs by at least 5 weight percent.
Claim 2
Dependent Claim
106 words
A blend comprising a mixture of (a) 30-70 weight percent of (a), (b) and (c) of polyvinyl chloride, (b) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 40-52 weight percent and a sulfur content of 0.2-5 weight percent in the polymer, and (c) 7.5-55 weight percent of (a), (b) and (c) of a chlorosulfonated polyethylene having a chlorine content of 24-40 weight percent and a sulfur content of 0.2-5 weight percent in the polymer; with the proviso that the chlorine content of the chlorosulfonated polyethylene of components (b) and (c) differs by at least 5 weight percent.
Claim 3
Dependent Claim
33 words
The blend of claim 1 wherein the amount of component (b) present is between 12 and 37 weight percent and the amount of component (c) present is between 12 and 37 weight percent.
Claim 4
Dependent Claim
43 words
The blend of claim 2 wherein the chlorine content of the chlorosulfonated polyethylene of component (b) is between 41-45 weight percent in the polymer, and the chlorine content of the chlorosulfonated polyethylene of component (c) is between 29-36 weight percent in the polymer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |