Patent US4035440A successfully refreshed from Google Patents.
US4035440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blend of thermoplastic polyurethane elastomer with chlorinated polyethylene
Assignee: Uniroyal Ltd Canada
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Filing: 1973-03-29
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Granted: 1977-07-12
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Expires: 1993-03-29
Abstract
Abstract Thermoplastic blends of a minor amount of chlorinated polyethylene with a major proportion of thermoplastic polyurethane elastomer have good processing and mold release properties. Thermoplastic blends of a minor amount of thermoplastic polyurethane elastomer with a major proportion of chlorinated polyethylene have good strength properties and processing characteristics. Sheets made from the blends have good vacuum-forming properties and low temperature flexibility.
Inventors
- 👤 Som Nath Khanna
- 👤 Mitchell Borr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:43
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A method of making a shaped article comprising the steps of blending (a) from 10 to 90% by weight of a high molecular weight thermoplastic polyurethane elastomer devoid of ethylenic unsaturation and free --NCO groups having a 350° F. melt flow index of from 0 to 100 which is a reaction product of polytetramethylene ether glycol, butanediol-1,4 and diphenylmethane-p,p'-diisocyanate, and (b) correspondingly from 90 to 10% by weight of an elastomeric chlorinated polyethylene having a glass transition temperature of -30° C. to -20° C. and a chlorine content of 25-50% by weight, the resulting blend being capable of being reprocessed and forming the resulting blend into a shaped article using a thermoplastic processing technique.
Claim 2
Independent Claim
114 words
A method of making a shaped article comprising the steps of blending (a) from 10 to 90% by weight of a high molecular weight thermoplastic polyurethane elastomer devoid of ethylenic unsaturation and free --NCO groups having a 350° F. melt flow index of from 0 to 100 which is a reaction product of polytetramethylene ether glycol, butanediol-1,4 and diphenylmethane-p,p'-diisocyanate, and (b) correspondingly from 90 to 10% by weight of an elastomeric chlorinated polyethylene having a glass transition temperature of -30° C. to -20° C. and a chlorine content of 25-50% by weight, the resulting blend being capable of being reprocessed and forming the resulting blend into a shaped article using a thermoplastic processing technique.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |