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    PHOTOPOLYMERISABLE COMPOSITIONS
    1.
    发明专利
    PHOTOPOLYMERISABLE COMPOSITIONS 未知

    公开(公告)号：AU534701B2

    公开(公告)日：1984-02-09

    申请号：AU6348880

    申请日：1980-10-17

    Applicant: BASF AG

    Inventor： HEINZ GERHARD ,  RICHTER PETER ,  MONG-JON JUN

    IPC: C08F2/00 ,  C08F2/48 ,  C08F16/12 ,  C08F16/14 ,  C08F20/10 ,  C08F20/18 ,  C08F287/00 ,  C08F297/00 ,  C08F297/04 ,  C08L53/02 ,  G03F7/033 ,  C09J7/02 ,  G03C1/68 ,  G03F7/10

    Abstract: Photopolymerizable compositions based on an elastomeric styrene-diene block polymer, one or more photopolymerizable olefinically unsaturated monomers and one or more photopolymerization initiators exhibit improved properties if they contain, as an essential constituent, an elastomeric block copolymer of the general structure A-B-C, where A is a thermoplastic, non-elastomeric polymer block based on styrene compounds and having a second order transition point above +25 DEG C., B is an elastomeric polymer block based on butadiene and/or isoprene and having a second order transition point below -20 DEG C. and C is a polymer block, different from B, having a second order transition point of from -30 DEG C. to +15 DEG C., C being either a homopolymer or copolymer block based on butadiene or isoprene or a random copolymer block based on conjugated dienes and styrene compounds. The photopolymerizable compositions may be used, inter alia, for the production of photo-curable adhesives, resilient and flexible sheet material and, in particular, flexographic relief printing plates.

    PHOTOPOLYMERIZABLE COMPOSITIONS AND PHOTO-CURABLE ELEMENTS MADE THEREFROM
    2.
    发明专利
    PHOTOPOLYMERIZABLE COMPOSITIONS AND PHOTO-CURABLE ELEMENTS MADE THEREFROM 未知

    公开(公告)号：CA1152247A

    公开(公告)日：1983-08-16

    申请号：CA362514

    申请日：1980-10-16

    Applicant: BASF AG

    Inventor： HEINZ GERHARD ,  RICHTER PETER ,  JUN MONG-JON

    IPC: C08F2/00 ,  C08F2/48 ,  C08F16/12 ,  C08F16/14 ,  C08F20/10 ,  C08F20/18 ,  C08F287/00 ,  C08F297/00 ,  C08F297/04 ,  C08L53/02 ,  G03F7/033 ,  G03C1/68

    Abstract: O.Z. 0050/034095 PHOTOPOLMYERIZABLE COMPOSITIONS AND PHOTO-CURABLE ELEMENTS MADE THEREFROM Photopolymerizable compositions based on an elastomeric styrene-diene block polymer, one or more photopolymerizable olefinically unsaturated monomers and one or more photopolymerization initiators exhibit improved properties if they contain, as an essential-constituent, an elastomeric block copolymer of the general structure A-B-C, where A is a thermoplastic, non-elastomeric polymer block based on styrene compounds and having a second order transition point above +25.degree.C, B is an elastomeric polymer block based on butadiene and/or isoprene and having a second order transit1on point below -20.degree.C and C is a polymer block, different from B, having a second order transition point of from - 30.degree.C to + 15.degree.C, C being either a homopolymer or copolymer block based on butadiene or isoprene or a random copolymer block based on conjugated dienes and styrene compounds. The photopolymerizable compositions may be used, inter alia, for the production of photo-curable adhesives, resillent and flexible sheet material and, in particular, flexographic relief printing plates.

    PREPARATION OF BRANCHED BLOCK COPOLYMERS
    4.
    发明专利
    PREPARATION OF BRANCHED BLOCK COPOLYMERS 未知

    公开(公告)号：CA1180840A

    公开(公告)日：1985-01-08

    申请号：CA383818

    申请日：1981-08-13

    Applicant: BASF AG

    Inventor： HEINZ GERHARD ,  SCHMITT BURGHARD ,  DORN INGO H ,  GAUSEPOHL HERMANN ,  GERBERDING KARL ,  JUNG RUDOLF H ,  MITTNACHT HANS ,  POEHRT JUERGEN ,  WITTMER PAUL

    IPC: C08F297/04 ,  C08G81/02

    Abstract: of the disclosure: A process for the preparation of branched block copolymers of from 60 to 95 % by weight of a monovinyl-aromatic monomer and from 40 to 5 % by weight of a conjugated diene by polymerizing the monomers in an inert solvent in the presence of a monolithiumhydrocarbon as the initiator, wherein, in a first process stage (a), from 50 to 80, or where necessary at most 90, % by weight of the total amount of monovinyl-aromatic compound are polymerized to virtually complete conversion in the presence of a relatively small amount of the monolithium-hydrocarbon. This stage is carried out by starting with from 30 to 70 % by weight of the vinylaromatic monomer and adding from 70 to 30 % by weight in the feed, during the polymerization, in such a way that the polymerization temperature, which at the start of the polymerization is from 30 to 40.degree.C, is kept at from 45 to 70.degree.C, with use of reflux cooling. After all the monomer feed has been added the reaction temperature is lowered to 30- 40.degree.C by evaporative cooling. In a second process stage (b), an additional amount of initiator is added to the reaction solution, after which from 1 to 30 % by weight of the total amount of monovinyl-aromatic monomer can be added, the sum of the amounts of monovinylaromatic monomer added in the first and second process stages being at most 90 % by weight of the total amount of monovinyl-aromatic monomer. The monovinyl-aromatic monomer added in the second process stage is polymerized to virtually complete conversion, employing the temperature profile described for stage (a). In process stage (c), the remainder of the monovinyl-aromatic monomer and all of the conjugated diene are added, at least predominantly in the form of a mixture, and polymerized so that the reaction temperature does not rise above 90 - 110.degree.C. Finally, after virtually complete conversion of the monomers, and preferably without prior cooling, a suitable liquid polyfunctional coupling agent is run in undiluted and the mixture of the linear block copolymers obtained, which still contain active terminal lithium-carbon bonds, is coupled, with stirring, to form branched block copolymers. The products prepared according to the invention are used for injection molding.

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