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    PHOTOPOLYMERIZABLE MIXTURES AND PHOTOCURABLE ELEMENTS MADE THEREFROM
    2.
    发明专利
    PHOTOPOLYMERIZABLE MIXTURES AND PHOTOCURABLE ELEMENTS MADE THEREFROM 未知

    公开(公告)号：DE3061513D1

    公开(公告)日：1983-02-03

    申请号：DE3061513

    申请日：1980-10-10

    Applicant: BASF AG

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

    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 ,  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.

    6.
    发明专利
    未知

    公开(公告)号：DE2259360A1

    公开(公告)日：1974-06-12

    申请号：DE2259360

    申请日：1972-12-04

    Applicant: BASF AG

    Inventor： VOLKERT OTTO DR ,  WIGGER AUGUST DR ,  ZUERGER MANFRED ,  RICHTER PETER DR

    IPC: C08F299/00 ,  B05D3/06 ,  C08F283/00 ,  C08F290/00 ,  C08G18/00 ,  C08G18/63 ,  C08J5/18 ,  C08G22/04 ,  C09D3/72

    Abstract: 1450906 Polyurethane layers; photopolymerizing unsaturated monomers BASF AG 3 Dec 1973 [4 Dec 1972] 55919/73 Headings C3R and C3P Polyurethane layers are prepared by adding a compatible monomer having at least two photocross-linkable C-C multiple bonds or a compatible monomer mixture comprising at least 50% by weight of one of such monomers and not more than 50% by weight of a photopolymerizable monoethylenically unsaturated monomer, and optionally also a photopolymerization initiator, to a liquid polyurethane elastomer forming reaction mixture comprising (A) (i) a polyether, polyester, hydroxypolyether urethane or hydroxypolyester urethane or a mixture thereof with a polyalcohol and/or a diamino and (ii) a diisocyanate or (B) (i) a prepolymer of a hydroxyl compound as defined in (A) and a diisocyanate and (ii) a polyester, polyether, hydroxypolyester urethane, hydroxypolyetherurethane, polyhydric alcohol, or diamine or a mixture of two or more thereof, the resulting mixture containing a major amount of the polyurethane elastomer-forming reaction mixture, applying the resulting mixture to a substrate to form a layer, irradiating the layer with electromagnetic radiation of wavelength less than 0À7 Ám to effect photocrosslinking of the monomer(s) and gelling of the layer and thermally curing the so-treated layer. The layer is suitably formed on a continuously moving substrate and has a thickness of from 0À2 to 5 mm. Conventional polyurethane elastomer-forming reactants are used. The monomer having at least two C-C multiple bonds is preferably an olefinically poly-unsaturated carboxylate, for example a diester of a C 2-6 aliphatic diol and acrylic or methacrylic acid, a triester of a C 3-10 aliphatic triol and acrylic or methacrylic acid, a divinyl ester of a C 2-8 dicarboxylic acid, a diallyl ester of a C 2-8 dicarboxylic acid and a vinyl ester or allyl ester of a C 3-5 olefinically unsaturated monocarboxylic acid. The unsaturated monomers are preferably used in amounts not exceeding 10% weight of the reaction mixture.

    9.
    发明专利
    未知

    公开(公告)号：DE2301175A1

    公开(公告)日：1974-08-01

    申请号：DE2301175

    申请日：1973-01-11

    Applicant: BASF AG

    Inventor： RICHTER PETER DR ,  WIGGER AUGUST DR ,  ELZER ALBERT DR ,  VOLKERT OTTO DR

    IPC: C08F283/00 ,  G03F7/00 ,  G03F7/035 ,  G03F7/11

    Abstract: 1454191 Presensitized flexographic printing plates BASF AG 10 Jan 1974 [11 Jan 1973] 01168/74 Heading G2C A presensitized plate comprises a base, a non- photocrosslinkable elastomeric polymer intermediate layer 0À1-6 mm thick (i) having a Shore A hardness of 15-70 which is at least 20 below the Shore A hardness of the photocrosslinkable layer (below) in photocrosslinked state, (ii) being insoluble in the developer (below) and (iii) being bonded to the base, and a photocrosslinkable layer comprising a photoinitiator-containing photocrosslinkable material which comprises one or more polymers having in admixture therewith one or more photocrosslinkable monomers compatible with the polymer(s) and having one or more C-C multiple bonds 0À1-6 mm thick having the following features: (i) all or a major proportion by weight of its content of the polymer(s) consists of a polyurethane elastomer soluble in a developer and produced using one or more aliphatic polyisocyanates, (ii) the Shore A hardness of its material when photocrosslinked is 50-90 and (iii) it is bonded to the intermediate layer above. The photocrosslinkable layer may comprise 70-90 wt. per cent of the polymer(s) and 10-30 wt. per cent of the monomer(s), based on the weight of polymer(s) plus monomer(s). The base may be flexible or rigid, may or may not reflect actinic exposing radiation and may be steel, aluminium or polyester. The intermediate layer may comprise natural rubber, styrene-butadiene rubber, polybutadiene rubber, butadiene-acrylonitrile rubber, elastomeric ethylene-propylene copolymer, elastomeric propylene oxide polymer, silicone rubber, polysulphide rubber (see Example 4), elastomeric vinylidene fluoride - hexafluoropropylene copolymer, nitrile rubber (see Example 5) or polyurethane (see Examples 1-3) which may be derived from an aromatic diisocyanate e.g. toluylenediisocyanate. The photocrosslinkable layer may contain a dye e.g. Zapon Fast Black (see Example 4). After exposure and development the relief printing plate produced may be re-exposed for 10 minutes before it is dried for 20 minutes at 70‹C in a freshair dryer (see Examples 2, 4 and 5). Reference by way of disclaimer is made to 201/74.

    10.
    发明专利
    未知

    公开(公告)号：DE3765942D1

    公开(公告)日：1990-12-13

    申请号：DE3765942

    申请日：1987-01-20

    Applicant: BASF AG

    Inventor： RICHTER PETER DR ,  HOFFMANN GERHARD DR ,  BRONSTERT KLAUS DR ,  MUELLER WOLFGANG DR ,  GERBERDING KARL DR

    IPC: G03F7/038 ,  C08F2/48 ,  C08F2/50 ,  C08L53/00 ,  C08L53/02 ,  C09D153/00 ,  C09J153/00 ,  G03F7/032 ,  G03F7/033

    Abstract: The mixtures crosslinkable by photopolymerisation are based on binders, photopolymerisable monomers compatible therewith, photoinitiators and inhibitors of thermally initiated polymerisation and contain, as the binder, polymers of the formula I … … in which the variables and the indices are defined as follows:… Pol = radical of a block copolymer prepared by sequential anionic polymerisation of conjugated dienes and vinylaromatics, R = a vicinal alkanediyl group,… R = a divalent hydrocarbon group having 2 to 20 carbon atoms,… X = an acid anion group,… M = a metal cation, metal cation complex or cation of an amine,… a = an integer from 1 to 10 and… n = an integer from 1 to 10.

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