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    24.
    发明专利
    未知

    公开(公告)号：DE59301142D1

    公开(公告)日：1996-01-25

    申请号：DE59301142

    申请日：1993-05-05

    Applicant: HOECHST AG

    Inventor： WEHNER SUSANNE ,  KLIMA HEINZ ,  HOENEL MICHAEL DR ,  ZIEGLER PETER DR ,  WALZ GERD DR

    IPC: C08L63/00 ,  C08G59/28 ,  C09D5/44 ,  C09D175/00 ,  C09D175/04 ,  C25D13/06

    Abstract: Electrocoating bath containing a urethane of the formula R1-NHCOO-R2 where R1 is alkyl or a group of the formula B1-NH-B2-[X-B3]n-, R2 is a group of the formulae -(C2H4O)y-R1 and -(C3H7O) y-R or of the formula R is C1-C18-alkyl, Y is from zero to 4, B1 is hydrogen, alkyl or a group of the formula -COOR2, B2 and B3 can be identical or different and each is C2-C14-alkylene, n is an integer from 0 to 5, preferably from 0 to 2, X is -O-, -S-, -NH- or @N-(C1-C4)-alkyl, R3 is hydrogen or alkyl, alkenyl, hydroxyalkyl, phenyl or alkylphenyl, R4 and R5 can be identical or different and each is hydrogen or C1-C4-alkyl, and A is a direct bond or one of the groups -O-, -CH2O- or -CH2OCO-. The presence of these urethanes in the electrocoating bath reduces the number of surface defects in galvanised surfaces.

    25.
    发明专利
    未知

    公开(公告)号：DE4327493A1

    公开(公告)日：1995-02-23

    申请号：DE4327493

    申请日：1993-08-16

    Applicant: HOECHST AG

    Inventor： PFEIL ARMIN DR ,  HOENEL MICHAEL DR ,  OBERRESSL PAUL ,  DREISCHHOFF DIETER ,  PETRI STEFAN

    IPC: C08L51/08 ,  C08F2/44 ,  C08F283/00 ,  C08F283/10 ,  C08G59/04 ,  C08G59/06 ,  C08J3/03 ,  C08L63/00 ,  C08L71/02 ,  C08K5/09 ,  C08G59/14 ,  C08G59/42 ,  C08J3/24 ,  C09D163/00 ,  B65D25/14

    Abstract: 1. Aqueous epoxy resin dispersions containing (A) an epoxy resin which is a product of the condensation of (A-1) from 50 to 95 % by weight, preferably from 55 to 85 % by weight, of one or more epoxide compound(s) containing at least two epoxide groups per molecule and having an epoxide equivalent weight of from 100 to 2000 g/mol, (A-2) from 5 to 50 % by weight, preferably from 15 to 45 % by weight, of an aromatic polyol and (A-3) from 0 to 25 % by weight, preferably from 0 to 10 % by weight, of modifying compounds containing at least two epoxide reactive groups, (B) a dispersant comprising (B-1) a product of the condensation of a polyol having an average molecular weight of (Mw) of from 200 to 20,000 g/mol and an epoxide compound containing on average at least two epoxide groups per molecule and having an epoxide equivalent weight of from 100 to 10,000 g/mol and (B-2) optionally further, preferably nonionic surfactants, (C) the polymer, prepared in this dispersion, of ethylenically unsaturated monomers capable of free-radical polymerisation or copolymerisation, (D) a curing agent for the epoxy resin (A) and (E) optionally conventional additives and catalysts. These aqueous epoxy resin dispersions are suitable for the production of coatings, in particular for the internal coatings of beverage cans and preserve cans.

    27.
    发明专利
    未知

    公开(公告)号：DE58908087D1

    公开(公告)日：1994-09-01

    申请号：DE58908087

    申请日：1989-03-21

    Applicant: HOECHST AG

    Inventor： HOENEL MICHAEL DR ,  FINKE MANFRED DR ,  WALZ GERD DR ,  ZIEGLER PETER DR

    IPC: C08G18/32 ,  C08G18/38 ,  C08G18/64 ,  C08G18/80 ,  C09D5/44 ,  C09D175/00 ,  C09D175/04

    Abstract: Curing agents (A) for isocyanate-curable resins (B) which have an amine number of from 20 to 150 mg of KOH/g, a maximum OH number of 20 mg KOH/g and contain, per molecule, at least two capped isocyanate groups which are reactive under the curing conditions, are obtained by reacting A) an amine which contains at least one ss-hydroxyalkyl group per molecule, as an OH number of from 100 to 1200 mg KOH/g and an amine number of from 100 to 1200 mg of KOH/g and optionally also contains NHCO groups, optionally blended with another OH- and/or NH-functional compound, with B) a partially capped polyisocyanate, optionally blended with an at least bifunctional, OH- and/or NH-reactive compound. These curing agents, if necessary after neutralisation, are readily dispersible in aqueous systems and frequently have a stability-increasing action in water-borne paint formulations.

    28.
    发明专利
    未知

    公开(公告)号：DE3787459D1

    公开(公告)日：1993-10-21

    申请号：DE3787459

    申请日：1987-12-21

    Applicant: HOECHST AG

    Inventor： BRINDOEPKE GERHARD DR ,  HOENEL MICHAEL DR

    IPC: C08F8/30 ,  C08F8/32 ,  C08F20/26 ,  C08F20/28 ,  C08G18/67 ,  C09D5/44 ,  C09D201/02

    Abstract: Non-crosslinked reaction products of compounds (A) which contain structural units carrying 1,3-dioxolan-2-one groups in random distribution and compounds (B) which contain at least one primary aliphatic or cycloaliphatic amino group and additionally at least one further basic amino group. These reaction products are suitable, if appropriate together with conventional curing agents, especially as binders for coatings, above all electrodip coatings.

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