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    25.
    发明专利
    未知

    公开(公告)号：DE1206592B

    公开(公告)日：1965-12-09

    申请号：DEF0038618

    申请日：1962-12-20

    Applicant: HOECHST AG

    Inventor： BARTMANN DR WILHELM ,  BEERMANN DR CLAUS ,  EHMANN DR WERNER ,  ULMSCHNEIDER DR DIETER

    IPC: C08F2/18 ,  C08F2/20 ,  C08F2/22 ,  C08F4/00 ,  C08F271/00

    Abstract: Compounds having the formula in which R1 is hydrogen or CH3 and R2 is chlorine, C6H5, OOC.R3 or COOR4, R3 being hydrogen or a monovalent saturated aliphatic hydrocarbon radical containing 1-18 carbon atoms and R4 being a monovalent saturated aliphatic hydrocarbon radical containing 1-8 carbon atoms are polymerized by a free radical method in aqueous phase in the presence of a polymer or copolymer of an open chain N-vinyl-amide of formula in which R5 and R6 each represent hydrogen or a hydrocarbon radical containing 1-20 carbon atoms. The amount of polyvinyl amide dispersing agent may vary from 0.1 to 50% by weight of the water used and the polymeric products obtained are thus either polymer dispersions or graft copolymers. Exemplified monomers polymerized are vinyl acetate, vinyl acetate with dibutyl maleate, styrene, methyl methacrylate, ethyl acrylate, ethyl hexyl acrylate and ethyl hexyl acrylate with vinyl chloride in the presence of di-n-hexyl-azelate plasticizer. Other conventional surface-active agents and catalysts are exemplified.

    27.
    发明专利
    未知

    公开(公告)号：DE1091331B

    公开(公告)日：1960-10-20

    申请号：DEF0021407

    申请日：1956-10-12

    Applicant: HOECHST AG

    Inventor： BEERMANN DR CLAUS

    IPC: C08F2/00 ,  C08F4/42 ,  C08F36/04

    Abstract: Olefines are polymerized in a medium such as an aromatic or aliphatic hydrocarbon (optionally halogenated) using as catalyst a C1 to C6 alkyl titanium halide. Olefins specified are ethylene, propylene, butylene, isobutylene, octylene, butadiene, isoprene or mixtures thereof. Catalysts disclosed are monomethyl titanium trichloride, tribromide and triiodide, dimethyl titanium dichloride, and monoethyl and monoisobutyl titanium trichlorides. The catalyst may be prepared as specified in Specification 848,887 and may be purified before use with sodium chloride and/or diphenyl or dibenzyl ether, followed by distillation and recrystallization. Ethylene and/or catalyst may be added during the polymerization (see the examples). Specifications 799,392, 799,823 and 801,031 also are referred to.

    28.
    发明专利
    未知

    公开(公告)号：DE1026964B

    公开(公告)日：1958-03-27

    申请号：DEF0019076

    申请日：1955-12-16

    Applicant: HOECHST AG

    Inventor： BEERMANN DR CLAUS ,  BESTIAN DR HERBERT

    IPC: C08F2/00 ,  C08F4/42 ,  C08F36/04

    Abstract: Olefines are polymerized in a medium such as an aromatic or aliphatic hydrocarbon (optionally halogenated) using as catalyst a C1 to C6 alkyl titanium halide. Olefins specified are ethylene, propylene, butylene, isobutylene, octylene, butadiene, isoprene or mixtures thereof. Catalysts disclosed are monomethyl titanium trichloride, tribromide and triiodide, dimethyl titanium dichloride, and monoethyl and monoisobutyl titanium trichlorides. The catalyst may be prepared as specified in Specification 848,887 and may be purified before use with sodium chloride and/or diphenyl or dibenzyl ether, followed by distillation and recrystallization. Ethylene and/or catalyst may be added during the polymerization (see the examples). Specifications 799,392, 799,823 and 801,031 also are referred to.

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