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    1.
    发明专利
    未知

    公开(公告)号：DE2444118A1

    公开(公告)日：1976-04-01

    申请号：DE2444118

    申请日：1974-09-14

    Applicant: BASF AG

    Inventor： WERTHER HEINZ-ULRICH DIPL CHEM ,  WIGGER AUGUST DIPL CHEM DR ,  ELZER ALBERT DIPL PHYS DR ,  ZUERGER MANFRED ,  RICHTER PETER DIPL CHEM DR

    IPC: G03F7/00 ,  G03F7/09 ,  G03F7/095 ,  G03F7/11

    Abstract: The invention relates to relief plates for flexographic printing comprising a relatively soft elastomeric base (U) having a modulus of elasticity of from 10 to 200 kg/cm2 and a thickness of from 0.5 to 6 mm and, firmly bonded thereto, a thin, relatively hard, difficultly soluble intermediate layer Z having a modulus of elasticity of from 1 x 103 to 2.1 x 106 kg/cm2 and a thickness of from 5 to 500 mu and, firmly bonded to said intermediate layer Z, a relief layer P' consisting of a photocrosslinked elastomeric mixture having a modulus of elasticity of from 30 to 2000 kg/cm2 and a thickness of from 200 to 300 mu , the modulus of elasticity of the photocrosslinked relief layer P' being the same as or higher than that of the base U and the neutral surface of the relief plate lying in or near the intermediate layer Z. The invention also relates to photosensitive laminates for the production of such plates.

    9.
    发明专利
    未知

    公开(公告)号：DE2443786A1

    公开(公告)日：1976-04-01

    申请号：DE2443786

    申请日：1974-09-13

    Applicant: BASF AG

    Inventor： BARZYNSKI HELMUT DIPL CHEM DR ,  LENZ WERNER DIPL CHEM DR ,  WERTHER HEINZ-ULRICH DIPL CHEM ,  HARTMANN HEINRICH DIPL CHEM DR ,  LEHNER AUGUST ING GRAD ,  STUTZ HERBERT DIPL CHEM DR ,  HOFFMANN GERHARD DIPL CHEM DR

    IPC: C08F299/00 ,  C08F2/50 ,  C08F290/00 ,  C08F299/06 ,  C08G18/67 ,  G03F7/032 ,  G03F7/038 ,  G03F7/02

    Abstract: 1519059 Photo-crosslinkable polyurethane composition BASF AG 12 Sept 1975 [13 Sept 1974] 37561/75 Heading C3V A photo-crosslinkable composition comprises a photoinitiator and a mixture of the following materials in the proportions:-(A) from 40 to 80% by weight of an olefinically unsaturated isocyanate group-free polyurethane which has a molecular weight of from 400 to 10,000 and which has been manufactured by reaction of (A1) a polyester having a hydroxyl number of 100 to 300 and derived from a C2 to C8-saturated polyhydric aliphatic alcohol and a C4 to C8- saturated dicarboxylic acid, or an ester forming derivative of such dicarboxylic acid, at least 50 mole per cent of such polyester-forming materials being saturated aliphatic compounds with (A2) a C6 to C36-polyisocyanate and (A3) a monoacrylate or monomethacrylate of a C2 to C10- aliphatic diol and (B) from 60 to 20% by weight of a C6 to C8-N-vinyl lactam-monomer or a mixture of at least 20% by weight thereof with at least one comonomer, or with a reaction product prepared from (A2) and (A3). Examples are given in which (a) an adipic acid/phthalicanhydride/1,2 -propylene glycol/1,1,1-trimethylolpropane polyester is reacted with hexamethylene diisocyanate and 2-hydroxypropyl acrylate, the product being mixed with N- vinylpyrrolidone and benzoin methyl ether, applied to a substrate and exposed image-wise to UV light to form a relief printing plate; (b) as (a) except that a monomer mixture (B) of N - vinylpyrrolidone, 1 - hydroxypropyl acrylate, 2 - hydroxypropyl acrylate and acrylamide is used; (c) a polyester as in (a) is reacted with isophorone diisocyanate, 2-hydroxypropyl acrylate and, optionally, 1 - hydroxypropyl acrylate, mixed with N-vinylpyrrolidone or a mixture thereof with 2-hydroxypropylacrylate and acrylamide, and used as in (a), using benzoin isopropyl, or methyl ether as initiator.

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