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    • 28. 发明授权
      US3845021A Polyurea-urethane shock absorbing compositions 失效
    • Polyurea-urethane shock absorbing compositions
    • 聚氨酯 - 尿素冲击吸收组合物
    • US3845021A
    • 1974-10-29
    • US23272772
    • 1972-03-08
    • GOODYEAR TIRE & RUBBER
    • DUKES D , PEARSON C
    • C08G18/10 , C08G18/12 , C08G18/40 , C08G18/48 , C08G18/76 , B61G9/02 , F16F7/00
    • C08G18/7685 , C08G18/10 , C08G18/12 , C08G18/4018 , C08G18/4854 , C08G18/3814 , C08G18/38
    • 1. A SHOCK ABSORBING DIVICE COMPRISING A SERIES OF TEN LOADED RESILIENT SHOCK ABSORBING UNITS, SAID DEVICE CHARACTERIZED BY NOT BOTTOMING OUT WITH A 27,000 POUND HAMMER BEING DROPPED VERTICALLY ON THE DEVICE FROM A HEIGHT OF ABOUT 18 INCHES AT ABOUT 25* C., FURTHER CHARACTERIZED BY SAID SHOCK ABSORBING UNITS NOT CRACKING AGER DROPPING SAID HAMMER 3 TIMES ON THE DEVICE AT -35* C. AND ADDITIONALLY CHARACTERIZED BY PASSING THE AAR SPEC M-901-E ENDURANCE TEST, STARTING AT ABOUT 25* C., BY DROPPING SAID HAMMER AT VARIABLE VERTICAL HEIGHTS OF ABOUT 1 TO ABOUT 30 INCHES UNTIL 35 MILLION FOOT POUNDS F ENERGY HAVE BEEN EXPENDED ON THE DEVICE, WHERE EACH OF SAID SHOCK ABSORBING UNITS IS CHARACTERIZED BY DEFLECTING FROM ABOUT 0.3 TO ABOUT 0.6 INCH AT ABOUT 25* C. UPON THE APPLICATION OF ABOUT 1800 POUNDS PER SQUARE INCH UNIFORMLY TO THE END SURFACE AREAS OF SAID RESILIENT COMPOSITION WHEN THE SAID COMPOSITION IF GENERALLY DISC SHAPED CYLINDRICAL ELEMENT WITH CIRCULAR PARALLEL FORCE RECEIVING END SURFACES HAVING DIAMETERS OF ABOUT 6.5 INCHES, EACH END SURFACE BEING ADHERED TO A METAL PLATE, A HEIGHT OF ABOUT 1.5 INCH, AND A SIDE-WALL CONNECTING THE END SURFACES SUBSTANTIALLY IN THE FORM OF A V-SHAPED GROOVE HAVING SUBSTANTIALLY EQUAL LENGTH SIDES, THE SAID GROOVE EXTENDING BETWEEN THE SAID END SURFACES, THE VOLUME OF THE SOLID PORTION OF THE SAID ELEMENT BEING ABOUT 150 PERCENT OF THE VOLUME OF THE SAID GROOVE, AND FURTHER CHARACTERIZED BY A -40* C. COLD TEMPERATURE COMPRESSION TEST WHERE THE SAID COMPOSITION, AT -40* C., WHEN SHAPED AND CURED TO A SOLID CIRCULAR DISC WITH A STRAIGHT SIDE-WALL, HAVING A DIAMETER OF ABOUT 1.13 INCHES AND A THICKNESS OF ABOUT 0.5 INCH, REQUIRES A MAXIUM PRESSURE OF 7,500 POUNDS PER SQUARE INCH APPLIED TO ITS FLAT SURFACES TO COMPRESS THE DISC 40 PERCENT, WHERE SAID POLYUREA-URETHANE COMPOSITION IS PREPARED BY THE METHOD WHICH COMPRISES REACTING AT LEAST ONE DIAMINE SELECTED FROM THE GROUP CONSISTING OF ORTHODICHLOROBENZIDINE AND 4,4''-METHYLENE BIS-ORTHOCLOROANILINE WITH THE REACTION PRODUCT OF 3,3-BITOLYLENE-4,4''-DIISOCYANTE AND REACTIVE HYDROGEN CONTAINING POLYMERIC MATERIALS SELECTED FROM (1) POLYTETRAMETHYLENE ETHER GLYCOLS HAVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 800 TO ABOUT 2200 WITH A TOTAL AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1200 TO ABOUT 1500 OR (2) A MIXTURE F REACTIVE HYDROGEN-CONTAINING MATERIALS COMPRISING IN THE RANGE OF FROM ABOUT 30 TO ABOUT 100 WEIGHT PERCENT POLYTETRAMETHYLENE ETHER GYLCOLS HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 800 TO ABOUT 2200 AND CORRESPONDINGLY IN THE RANGE OF UP TO ABOUT 70 WEIGHT PERCENT OF POLYESTER POLYOLS HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 800 OT ABOUT 2200 SELECTED FROM AT LEAST ONE OF (A) CAPROLACTONE POLYESTERS PREPARED FROM E-CAPROLACTONE AND GLYCOLS SELECTED FROM DIETHYLENE GLYCOL AND STRAIGHT CHAIN HYDROCARBON DIOLS CONTAINING 4 TO 6 CARBON ATOMS, (B) ADIPATES OF ADIPIC ACID AND STRAIGHT CHAIN ALIPHATIC HYDROCARBON DIOLS CONTAINING 4 TO 6 CARBON ATOMS AND (C) AZELATES OF AZELAIC ACID AND STRAIGHT CHAIN ALIPHATIC HYDROCARBONS DIOLS CONTAINING 4 TO 6 CARBON ATOMS WITH THE REQUIREMENTS THAT THE TOTAL AVERAGE MOLECULAR WEIGHT OF THE MIXTURE OF POLYETRAMETHYLENE ETHER GLYCOL AND POLYESTER POLYOL IS IN THE RANGE OF ABOUT 1300 TO ABOUT 1900, WHERE THE RATIO OF ISOCYANATO GROUPS OR THE DIIOCYANATE TO THE SUM OF HYDROXYL GROUPS OF THE POLYOLS IS FROM ABOUT 1.7 TO ABOUT 2.5, WHERE THE RATIO OF PRIMARY AMINO GROUPS OF THE DIAMINE TO EXCESS ISOCYANATO GROUPS OVER THE SUM OF HYDROXYL GROUPS OF THE POLYOLS IS IN THE RANGR OF ABOUT 0.6 TO ABOUT 1 WHERE THE ACID NUMBER OF THE POLYOLS IS LESS THAN ABOUT 1.
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