US3352803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of foamed polyurethane elastomers from (a) a polyether, (b) dicyclohexylmethane diisocyanate or hexamethylene diisocyanate, (c) hydrogen peroxide, (d) water, and (e) a catalyst
Assignee: Dunlop Rubber Co Ltd
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Filing: 1967-04-12
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Granted: 1967-11-14
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Expires: 1987-04-12
Abstract
No abstract record available.
Inventors
- 👤 Hogg Wilfrid Henry
- 👤 Coldfield Sutton
- 👤 Hartle Cedric
- 👤 Merriman Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2045; C08G18/2063; C08G18/22; C08G18/24; C08G18/244; C08G18/28; C08G18/40; C08G18/48; C08G18/70; C08G18/72; C08G18/73; C08G18/74; C08G18/75; C08G18/758; C08G18/83; C08G18/86; C08J9/04; C08J9/06; C08K; C08K3/00; C08K3/18; C08L; C08L75/00; C08L75/04; C08L83/00; C08L83/04; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
A METHOD OF PRODUCING A FOAMED POLYURETHANE ELASTOMER WHICH COMPRISES MIXING A POLYURETHANE PREPOLYMER HAVING TERMINAL ISOCYANATO GROUPS, BEING THE REACTION PRODUCT OF A POLYETHER CONTAINING AT LEAST TWO -OH GROUPS IN THE MOLECULE AND DICYCLOHEXYLMETHANE DIISOCYANATE WITH HYDROGEN PEROXIDE, WITH WATER AND WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF TRIETHYLENE DIAMINE, DIALKYL TIN DIESTERS OF FATTY ACIDS HAVING FROM 3 TO 5 CARBON ATOMS IN EACH ALKYL GROUP AND DIVALENT TIN SOAPS, AND ALLOWING THE WATER TO REACT WITH THE POLYURETHANE PREPOLYMER TO EXPAND THE PREPOLYMER INTO A FOAMED CONDITION, AND SIMULTANEOUSLY EFFECT CROSS-LINKING OF THE FOAMED PREPOLYMER.
Claim 2
Independent Claim
101 words
A METHOD OF PRODUCING A FOAMED POLYURETHANE ELASTOMER WHICH COMPRISES MIXING A POLYURETHANE PREPOLYMER HAVING TERMINAL ISOCYANATO GROUPS, BEING THE REACTION PRODUCT OF A POLYETHER CONTAINING AT LEAST TWO -OH GROUPS IN THE MOLECULE AND DICYCLOHEXYLMETHANE DIISOCYANATE WITH HYDROGEN PEROXIDE, WITH WATER AND WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF TRIETHYLENE DIAMINE, DIALKYL TIN DIESTERS OF FATTY ACIDS HAVING FROM 3 TO 5 CARBON ATOMS IN EACH ALKYL GROUP AND DIVALENT TIN SOAPS, AND ALLOWING THE WATER TO REACT WITH THE POLYURETHANE PREPOLYMER TO EXPAND THE PREPOLYMER INTO A FOAMED CONDITION, AND SIMULTANEOUSLY EFFECT CROSS-LINKING OF THE FOAMED PREPOLYMER.
Claim 3
Independent Claim
101 words
A METHOD OF PRODUCING A FOAMED POLYURETHANE ELASTOMER WHICH COMPRISES MIXING A POLYURETHANE PREPOLYMER HAVING TERMINAL ISOCYANATO GROUPS, BEING THE REACTION PRODUCT OF A POLYETHER CONTAINING AT LEAST TWO -OH GROUPS IN THE MOLECULE AND HEXAMETHYLENE DIISOCYANATE WITH HYDROGEN PEROXIDE, WITH WATER AND WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF TRIETHYLENE DIAMINE, DIALKYL TIN DIESTERS OF FATTY ACIDS HAVING FROM 3 TO 5 CARBON ATOMS IN EACH ALKYL GROUP AND DIVALENT TIN SOAPS, AND ALLOWING THE WATER TO REACT WITH THE POLYURETHANE PREPOLYMER TO EXPAND THE PREPOLYMER INTO A FOAMED CONDITION, AND SIMULTANEOUSLY EFFECT CROSS-LINKING OF THE FOAMED PREPOLYMER.
Claim 4
Independent Claim
101 words
A METHOD OF PRODUCING A FOAMED POLYURETHANE ELASTOMER WHICH COMPRISES MIXING A POLYURETHANE PREPOLYMER HAVING TERMINAL ISOCYANATO GROUPS, BEING THE REACTION PRODUCT OF A POLYETHER CONTAINING AT LEAST TWO -OH GROUPS IN THE MOLECULE AND HEXAMETHYLENE DIISOCYANATE WITH HYDROGEN PEROXIDE, WITH WATER AND WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF TRIETHYLENE DIAMINE, DIALKYL TIN DIESTERS OF FATTY ACIDS HAVING FROM 3 TO 5 CARBON ATOMS IN EACH ALKYL GROUP AND DIVALENT TIN SOAPS, AND ALLOWING THE WATER TO REACT WITH THE POLYURETHANE PREPOLYMER TO EXPAND THE PREPOLYMER INTO A FOAMED CONDITION, AND SIMULTANEOUSLY EFFECT CROSS-LINKING OF THE FOAMED 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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |