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62 条记录 (耗时 0.013 秒)

    Polymerization of epoxides with dihydrocarbon zinc pre-reacted with a polyhydric phenol
    3.
    发明授权
    Polymerization of epoxides with dihydrocarbon zinc pre-reacted with a polyhydric phenol 失效
    环氧化物与用多羟基苯酚预反应的二氢化锌的聚合

    公开(公告)号：US3657158A

    公开(公告)日：1972-04-18

    申请号：US3657158D

    申请日：1970-03-25

    申请人： HERCULES INC

    发明人： VANDENBERG EDWIN J

    IPC分类号： C08G65/12 ,  C08G23/06 ,  C08G23/14

    CPC分类号： C08G65/12

    摘要： OXIRANES ARE POLYMERIZED USING AS THE CATALYST THE PRODUCT OBTAINED BY REACTING A DIHYDROCARBON ZINC COMPOUND, SUCH AS DIETHYLZINC, WITH A POLYHYDRIC PHENOL SUCH AS RESORCINOL OR PYROGALLOL, IN A MOLAR RATIO OF POLYHYDRIC PHENOL TO ZINC COMPOUND OF FROM ABOUT 0.2:1 TO ABOUT 1.2:1. HIGHER MOLECULAR WEIGHT POLYMERS AND/OR HIGHER YIELDS OF POLYMERS ARE OBTAINED THAN WHEN THE DIHYDROCARBON ZINC COMPOUND IS USED WITHOUT PRE-REACTING IT WITH THE POLYHYDRIC PHENOL.

    Polyethers containing azidomethyl side chains
    4.
    发明授权
    Polyethers containing azidomethyl side chains 失效
    含有三甲基乙酰胺链的聚醚

    公开(公告)号：US3645917A

    公开(公告)日：1972-02-29

    申请号：US3645917D

    申请日：1970-02-25

    申请人： HERCULES INC

    发明人： VANDENBERG EDWIN J

    IPC分类号： C08G65/325 ,  C08G23/06

    CPC分类号： C08G65/325

    摘要： HIGH MOLECULAR WEIGHT POLYETHERS ARE PROVIDED THAT CONTAIN AZIDOMETHYL GROUPS PENDANT FROM THE MAIN POLYMER BACKBONE. THESE POLYMERS ARE CHARACTERIZED BY CONTAINING FROM 0.2 TO 100% OF AZIDOMETHYL ETHYLENE OXIDE REPEATING UNITS. THEY ARE PREPARED BY REACTING A POLYMER OF AN EPIHALOHYDRIN WITH A METAL AZIDE. THE AZIDOMETHYL POLYETHERS CAN BE CROSS-LINKED BY HEATING AT LOW TEMPERATURE (UNDER 100*C.)

    Catalyst and method for the polymerization of ethylene oxide
    5.
    发明授权
    Catalyst and method for the polymerization of ethylene oxide 失效
    乙烯氧化物聚合的催化剂和方法

    公开(公告)号：US3624008A

    公开(公告)日：1971-11-30

    申请号：US3624008D

    申请日：1969-06-30

    申请人： BASF WYANDOTTE CORP

    发明人： DAMUSIS ADOLFAS

    IPC分类号： C08G65/00 ,  C08F4/50 ,  C08G65/02 ,  C08G65/26 ,  C08G23/14 ,  C08G23/06

    CPC分类号： C08G65/2651 ,  C08G65/266

    摘要： A novel catalytic system comprising (a) a divalent alkaline earth metal, (b) anhydrous ammonia and (c) an organic dioxide is used to polymerize ethylene oxide to hard, granulated polymers having a final average molecular weight of from about 1 million to 10 million. The polymers are prepared by contacting the ethylene oxide with a suspension comprising the catalyst system and a nonsolvent for the polymer, thereby forming low-molecular weight polymers which are then built up by the addition thereto of further amounts of the oxide.

    Vulcanization of halogen containing elastomers with thioalkanoic acids and their salts and uncured and cured products thereof
    10.
    发明授权
    Vulcanization of halogen containing elastomers with thioalkanoic acids and their salts and uncured and cured products thereof 失效
    包含弹性体的卤素与硫代酸及其盐及其固化产物及其固化产物的组合

    公开(公告)号：US3732174A

    公开(公告)日：1973-05-08

    申请号：US3732174D

    申请日：1972-02-07

    申请人： GOODRICH CO B F

    发明人： NICHOLAS P

    IPC分类号： C08L71/03 ,  C08G23/06

    CPC分类号： C08L71/03 ,  C08L2666/22

    摘要： A NEW METHOD FOR VULCANIZING EPIHALOHYDRINE ELASTOMERS EMPLOYS, AS ESSENTIAL VULCANIZATION INGREDIENTS, (1) A THIOALKANOIC ACID OR ITS METAL SALTS SUCH AS THIODIPROPIONIC ACIDS, METHYLENE-BIS-THIOPROPIONIC ACID, THIODIACETIC ACID AND MERCAPTOACETIC ACID OR THE CORRESPONDING SODIUM OR LEAD SALTS, AND (2) A TERTIARY AMINE, PARTICULARLY THE COMPOUND 1,4-DIAZA (2.2.2) BICYCLOOCTAE. HEN THE ACID FORM OF INGREDIENT (1) IS EMPLOYED IT IS NECESSARY TO ADD A THIRD COMPONENT WHICH IS A METAL BASE COMPOUND SUCH AS AN ALKALI METAL CARBOXYLATE, LEAD OXIDE, ETC. WHEN A METAL SALT OF A THIOALKANOIC ACID INGREDIENT (1) SUCH AS DISODIUM THIODIPROPIONATE IS EMPLOYED THE THIRD COMPONENT IS UNNECESSARY. THE VULCANIZING SYSTEM POVIDES VERY FAST AND ADJUSTABLE CURE CYCLES PRODUCING VULCANIZATES OF LOW ODOR AND OF EXCELLENT PHYSICAL PROPERTIES.