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Patent US2879233A successfully refreshed from Google Patents.
US2879233A
Expired / Lapsed
US
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Process for the preparation of foamed polyurethanes
Assignee: Goodyear Tire and Rubber Co
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Filing: 1955-05-13
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Granted: 1959-03-24
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Expires: 1975-05-13
Abstract
No abstract record available.
Inventors
- 👤 Henry A Pace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G2110/00; C08G2110/0008; C08G2110/0083; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN THE PROCESS OF PREPARING FLEXIBLE ELASTOMERIC CELLULAR PRODUCTS FROM REACTANTS COMPRISING AN ORGANIC POLYISOCYANATE, WATER AND AN ACTIVE-HYDROGEN-CONTAINING POLYMERIC MATERIAL HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 750 TO 2,250 AND HAVING AN ACD NUMBER NOT GREATER THAN 5, SAID POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERIC PREPARED FROM THE CONDENSATION REACTION BETWEEN AT LEAST ONE DICARBOXYLIC ACID AND AT LEAST ONE GLYCOL, POLYESTERAMIDES AND POLYALKYLENE ETHER GLYCOLS , THE IMPROVEMENTS WHICH COMPRISE FIRST FORMING A PREPOLYMER BY REACTING SAID POLYMERIC MATERIAL CONTAINING NOT MORE THAN 0.2% WATER BY WEIGHT WITH FROM 0.90 TO 1.10 MOLS OF AN ORGANIC DISOCYANATE PER MOL OF SAID POLYMERIC MATERIAL UNTIL THE EXOTHERMIC HEAT OF REACTION HAS BEEN GENERATED AND REMOVED FROM THE REACTION MIXTURE, AND SUBSEQUENTLY MIXING ADDITIONAL ORGANIC POLYISOCYANATE AND WATER WITH SAID PREPOLYMER.
Claim 2
Dependent Claim
136 words
IN THE PROCESS OF PREPARING FLEXIBLE ELASTOMERIC CELLULAR PRODUCTS FROM REACTANTS COMPRISING AN ORGANIC POLYISOCYANATE, WATER AND AN ACTIVE-HYDROGEN-CONTAINING POLYMERIC MATERIAL HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 750 TO 2,250 AND HAVING AN ACD NUMBER NOT GREATER THAN 5, SAID POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERIC PREPARED FROM THE CONDENSATION REACTION BETWEEN AT LEAST ONE DICARBOXYLIC ACID AND AT LEAST ONE GLYCOL, POLYESTERAMIDES AND POLYALKYLENE ETHER GLYCOLS , THE IMPROVEMENTS WHICH COMPRISE FIRST FORMING A PREPOLYMER BY REACTING SAID POLYMERIC MATERIAL CONTAINING NOT MORE THAN 0.2% WATER BY WEIGHT WITH FROM 0.90 TO 1.10 MOLS OF AN ORGANIC DISOCYANATE PER MOL OF SAID POLYMERIC MATERIAL UNTIL THE EXOTHERMIC HEAT OF REACTION HAS BEEN GENERATED AND REMOVED FROM THE REACTION MIXTURE, AND SUBSEQUENTLY MIXING ADDITIONAL ORGANIC POLYISOCYANATE AND WATER WITH SAID PREPOLYMER.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |