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    • 34. 发明授权
    • Phase transfer process with catalyst recovery
    • 催化剂回收相转移过程
    • US06300431B1
    • 2001-10-09
    • US09466520
    • 1999-12-17
    • Hsien-Chang WangChia Shian CheeW. S. Winston Ho
    • Hsien-Chang WangChia Shian CheeW. S. Winston Ho
    • C08F208
    • B01D61/362B01J14/00B01J19/2475
    • A process for catalytic recovery in a phase transfer process wherein heterogeneous reactions in a liquid-liquid two phase reaction systems using a phase transfer catalyst is improved by separating the two liquid phases with a membrane which retains the catalyst while passing the aqueous polar liquid thereby allowing easy recovery of the phase transfer catalyst. The reaction is carried out between reactants selectively soluble in the different phases, one of the reactants being transferred into the other phase by means of a phase transfer catalyst which is soluble in said polar liquid phase with the one reactant. The phases are separated after completion of the reactions by adding water to the two-phase reaction system to dissolve out the polar liquid phase containing the phase transfer catalyst into an aqueous phase. Further, the phase transfer catalyst is separated from the polar liquid phase by passing the aqueous polar liquid phase through a membrane that retains the transfer catalyst while passing the polar liquid.
    • 在相转移过程中催化回收的方法,其中使用相转移催化剂的液 - 液两相反应体系中的非均相反应通过用保留催化剂的膜分离两个液相而改善,所述膜通过极性极性液体从而允许 容易回收相转移催化剂。 该反应在选择性溶于不同相的反应物之间进行,其中一种反应物通过相转移催化剂转移到另一相中,所述相转移催化剂可溶于所述极性液相中的一种反应物。 通过向两相反应体系中加入水以将含有相转移催化剂的极性液相溶出到水相中,在反应完成后分离各相。 此外,通过使极性液相通过保持转移催化剂的膜,同时通过极性液体,将相转移催化剂与极性液相分离。
    • 39. 发明授权
    • Intervulcanized elastomer blends
    • 互相硫化弹性体共混物
    • US5473017A
    • 1995-12-05
    • US305547
    • 1994-09-14
    • Hsien-Chang Wang
    • Hsien-Chang Wang
    • C08K3/22B60C1/00C08C19/20C08F8/00C08K5/14C08K5/40C08L7/00C08L9/00C08L11/00C08L21/00C08L23/16C08L23/20C08L23/22C08L23/26C08L13/00
    • C08L21/00B60C1/0008C08L23/22C08L23/26Y10S525/912
    • Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an isobutylene/para-methylstyrene copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.
    • 具有改进的固化效率的硫化组合物通过烯属不饱和二烯烃聚合物如天然或合成橡胶和饱和或低不饱和聚合物如异丁烯/对甲基苯乙烯共聚物的混合物的自由基固化来制备,所述异丁烯/对甲基苯乙烯共聚物含有垂饰于 聚合物链。 这些官能团含有与取代基α,β的烯属或乙烯基双键,其活化与二烯烃聚合物的自由基加成反应的双键。 优选的功能包括由以下结构表示的苄酯官能团:其中R2和R3独立地选自氢或C1至C6烷基,R4选自氢,C1至C28烷基,芳基或C2至C28烯基。