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    • 3. 发明授权
    • Process for making fire-retardant polyurethane foam using crude 4,4,4-trichloro-1,2-epoxybutane
    • 使用原料4,4,4-三氯-1,2-环氧丁烷制备阻燃聚氨酯泡沫的方法
    • US3847844A
    • 1974-11-12
    • US40863773
    • 1973-10-23
    • OLIN CORP
    • POLAK RFUZESI SLAPKIN M
    • C07D303/08C08G18/50C08G65/22C08G22/46C08G22/16
    • C07D303/08C08G18/5009C08G65/223
    • 1. IN PROCESS FOR PREPARING A POLYURETHANE FOAM BY REACTING A POLYETHER POLYOL WITH AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A REACTION CATALYST AND A FOAMING AGENT, SAID POLYETHER POLYOL COMPRISING THE PRODUCT OF REACTING 4,4,4, - TRICHLORO -1,2- EPOSYBUTANE WITH A MIXTURE OF (1) DEXTROSE AND (2) WATER, A POLYHYDRIC ALIPHATIC ALCOHOL OR A MIXTURE OF WATER AND A POLYHYDRIC ALIPHATIC ALCOHOL, THE IMPROVEMENT WHICH COMPRISES USING SAID EPOXYBUTANE AS A CRUDE MATERIAL HAVING NO MORE THAN ABOUT 5% BY WEIGHT OF VOLATILE COMPONENTS AND CONTAINING FROM ABOUT 15 TO ABOUT ABOUR 42% BY WEIGHT OF IMPURITIES AND CORRESPONDINGLY FROM ABOUT 85 TO ABOUT 58% OF SAID EPOXYBUTANE, SAID CRUDE EPOXYBUTANE BEING PREPARED BY A PROXESS CONSISTING ESSENTIALLY OF (A) REACTING, AT A TEMPERATURE FROM ABOUT 35 TO ABOUT 62* C., 4,4,4-TRICHLORO-2-HALOBUTANOL WITH AN AQUEOUS SOLUTION AF AN ALKALI METAL HYDROXIDE OR AN ALKALINE EARTH METAL HYDROXIDE, SAID AQUEOUS SOLUTION BEING EMPLOYED IN A SUFFICIENT PROPORTION TO PROVIDE AT LEAST A STOICIOMETRIC AMOUNT OF HYDROXIDE WHICH IS REQUIRED TO REACT WITH SAID 4,4,4, - TRICHLORO -2HALOGUTANOL, THEREBY FORMING A TWO-PHASE REACTION PRODUCT MIXTURE, NAMELY, AN AQUEOUS PHASE AND A NON-AQUEOUS PHASE CONTAINING SAID CRUDE EPOXYBUTANE, AND (B) SEPARATING SAID TWO PHASES AND RECOVERING SAID CRUDE EPOXYBUTANE.