Patent US4556694A successfully refreshed from Google Patents.
US4556694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature flexible PVC blends
Assignee: EIDP Inc
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Filing: 1984-07-26
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Granted: 1985-12-03
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Expires: 2004-07-26
Abstract
Abstract Low temperature impact properties of poly(vinyl chloride) are improved by adding to the poly(vinyl chloride) chlorosulfonated polyethylene and chlorinated polyethylene wherein the base polyethylene of each additive has a density of at least 0.94. The use of all three components provides a synergistic lowering of the brittleness temperature as compared to either chlorosulfonated polyethylene or chlorinated polyethylene when added to the poly(vinyl chloride).
Inventors
- 👤 Lawrence R. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:21
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08L23/32; C08L23/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A method for improving the low temperature brittle point properties of non-rigid poly(vinyl chloride) compositions containing from 40 to 85 parts PVC comprising adding to said poly(vinyl chloride) compositions from 1 to 50 parts of chlorosulfonated polyethylene, wherein said base polyethylene has a density of at least 0.94 and from 1 to 50 parts of chlorinated polyethylene, wherein said base polyethylene has a density of at least 0.94, and wherein the total amount of chlorinated polyethylene and chlorosulfonated polyethylene does not exceed 60% by weight of the polymer present.
Claim 2
Independent Claim
89 words
A method for improving the low temperature brittle point properties of non-rigid poly(vinyl chloride) compositions containing from 40 to 85 parts PVC comprising adding to said poly(vinyl chloride) compositions from 1 to 50 parts of chlorosulfonated polyethylene, wherein said base polyethylene has a density of at least 0.94 and from 1 to 50 parts of chlorinated polyethylene, wherein said base polyethylene has a density of at least 0.94, and wherein the total amount of chlorinated polyethylene and chlorosulfonated polyethylene does not exceed 60% by weight of the polymer present.
Claim 3
Dependent Claim
20 words
A method as described in claim 1 wherein the total amount of PVC present ranges from 50 to 70 parts.
Claim 4
Dependent Claim
19 words
A method as described in claim 2 wherein substantially equal amounts of chlorosulfonated polyethylene and chlorinated polyethylene are added.
Claim 5
Dependent Claim
30 words
A method as described in claim 3 wherein the molecular weight of the polyethylene in chlorinated polyethylene and chlorosulfonated polyethylene is less than 100 as determined by MI 20 .
Claim 6
Dependent Claim
24 words
A method as described in claim 4 wherein the chlorine content of the chlorinated polyethylene ranges from about 35 to about 50% by weight.
Claim 7
Dependent Claim
35 words
A method as described in claim 5 wherein the chlorine content of the chlorosulfonated polyethylene ranges from about 20 to about 50% by weight and the sulfur content is at least about 0.1% by weight.
Claim 8
Dependent Claim
34 words
A method as described in claim 6 wherein each of the chlorinated polyethylene and chlorosulfonated polyethylene is present in amounts ranging from about 2 to about 30 parts based on the total resin present.
Claim 9
Dependent Claim
32 words
A method as described in claim 7 wherein the chlorinated polyethylene and chlorosulfonated polyethylene are present in amounts ranging from about 5 to about 25 parts based upon the total resin present.
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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |