US3915937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(oxypropylene) glycol based polyurethane elastomers suitable for automotive body parts
Assignee: Uniroyal Chemical Co Inc
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Filing: 1974-05-10
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Granted: 1975-10-28
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Expires: 1994-05-10
Abstract
Abstract Flexible automobile exterior body parts are molded from a polyurethane elastomer prepared from a reaction mixture comprising: A. A POLYMERIC DIOL SELECTED FROM THE GROUP CONSISTING OF POLY(OXYPROPYLENE) GLYCOL AND ETHYLENE OXIDE ''''TIPPED'''' POLY(OXYPROPYLENE) GLYCOL OF MOLECULAR WEIGHT OF FROM ABOUT 1750 TO ABOUT 2500; B. METHYLENEBIS(4-PHENYLISOCYANATE); C. 1,4-BUTANEDIOL. The invention also relates to this polyurethane elastomer.
Inventors
- 👤 Francis X O'shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4841; B; B62; B62D; B62D29/00; B62D29/04; C08G18/08; C08G18/10; C08G2120/00; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A POLYURETHANE ELASTOMER WHICH IS A REACTION PRODUCT OF: (1) A PREPOLYMER FORMED BY THE INTERACTION OF A POLYMERIC DIOL SELECTED FROM THE GROUP CONSISTING OF POLY(OXYPRPYLENE) GLYCL AND POLY(OXYPROPYLENE GLYCOL TIPPED WITH ABOUT 10% BY WEIGHT OF ETHYLENE OXIDE AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1750 TO ABOUT 2500 AND METHYLENEBIS(4-PHEYL ISOCYANATE), AN (2) 1,4-BUTANEDIOL, THE NCO/OH EQUIVALENTS RATIO BEING FROM ABOUT 0.95 TO ABOUT 1.20 AND THE MOLAR RATIO OF SAID BUTANEDIOL TO SAID POLYMERIC DIOL BEING FROM ABOUT 3.0:1 TO ABOUT 9.0:1, SAID ELASTOMER HAVING A HARDNESS OF ABOUT 40 TO 55 SHORE D, AN ELONGATION OF GREATER THAN 300%, AN ULTIMATE TENSILE STRENGTH OF AT LEAST 3000 PSI ADA DIE C TWEAR STRENGTH OF AT LEAST 500 PLI.
Claim 2
Dependent Claim
124 words
A POLYURETHANE ELASTOMER WHICH IS A REACTION PRODUCT OF: (1) A PREPOLYMER FORMED BY THE INTERACTION OF A POLYMERIC DIOL SELECTED FROM THE GROUP CONSISTING OF POLY(OXYPRPYLENE) GLYCL AND POLY(OXYPROPYLENE GLYCOL TIPPED WITH ABOUT 10% BY WEIGHT OF ETHYLENE OXIDE AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1750 TO ABOUT 2500 AND METHYLENEBIS(4-PHEYL ISOCYANATE), AN (2) 1,4-BUTANEDIOL, THE NCO/OH EQUIVALENTS RATIO BEING FROM ABOUT 0.95 TO ABOUT 1.20 AND THE MOLAR RATIO OF SAID BUTANEDIOL TO SAID POLYMERIC DIOL BEING FROM ABOUT 3.0:1 TO ABOUT 9.0:1, SAID ELASTOMER HAVING A HARDNESS OF ABOUT 40 TO 55 SHORE D, AN ELONGATION OF GREATER THAN 300%, AN ULTIMATE TENSILE STRENGTH OF AT LEAST 3000 PSI ADA DIE C TWEAR STRENGTH OF AT LEAST 500 PLI.
Claim 3
Dependent Claim
19 words
A polyurethane elastomer as in claim 1 in which the molecular weight of said polymeric diol is about 2000.
Claim 4
Dependent Claim
50 words
A shaped article prepared from the polyurethane elastomer of claim 1 and characterized, when having a thickness of 0.08 inch, by remaining intact under a 5 mile per hour impact at -20* F. and by having a sag of less than two inches as determined by the Heat Test O''S.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |