Precipitation polymerization of {60 -methylstyrene
    1.
    发明授权
    Precipitation polymerization of {60 -methylstyrene 失效
    {60-甲基苯乙烯的降解聚合

    公开(公告)号:US3687924A

    公开(公告)日:1972-08-29

    申请号:US3687924D

    申请日:1969-12-05

    Applicant: HOECHST AG

    CPC classification number: C08F12/12 C08F2/38 C08F2/42

    Abstract: The present invention relates to a process for precipitation polymerization of Alpha -methylstyrene in a hydrocarbon medium in which poly- Alpha -methylstyrene is insoluble or only little soluble. The polymerization is initiated by a finely divided alkali metal which is used together with certain phosphoric acid amides or ethers or mixtures thereof as polymerization accelerators.

    Abstract translation: 本发明涉及α-甲基苯乙烯在其中聚-α-甲基苯乙烯不溶或很少溶解的烃介质中的沉淀聚合方法。 聚合是由细分的碱金属引发的,该碱金属与某些磷酸酰胺或其醚或其混合物一起用作聚合促进剂。

    Compositions which comprise polymerised trifluoro-chlorethylene

    公开(公告)号:GB724742A

    公开(公告)日:1955-02-23

    申请号:GB1615853

    申请日:1953-06-11

    Applicant: HOECHST AG

    Abstract: Compositions suitable for coating and for the manufacture of films comprise polytrifluorochlorethylene which may be dissolved in a solvent, and a hydroaromatic hydrocarbon of the cyclopentane, cyclohexane, menthane, camphane, pinane, or diterpene series which contains at least one carbon-carbon double bond and at least one alkyl, alkylene or alkylidene radical. Specified hydrocarbons are dipentene, dicyclopentadiene, beta-pinene, camphene, vinyl-cyclohexene, methyl-cyclohexene, phellandrene, terpinolene, and methyl-cyclohexadiene. Solvents mentioned are 1 : 2 : 3-trifluoro - pentachloropropane and o - chlorobenzotrifluoride. Films may be made by spraying solutions on to an aluminium foil and subsequently removing the foil by dissolving it with dilute hydrochloric acid.

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