METHOD FOR PRODUCING RADIATION-CURABLE URETHANE (METH)ACRYLATES

    公开(公告)号:US20170327626A1

    公开(公告)日:2017-11-16

    申请号:US15520863

    申请日:2015-10-16

    Applicant: BASF SE

    Abstract: Disclosed are urethane (meth)acrylates obtainable by implementation of the following steps: (r1) partially reacting an alkoxylated polyol (A) with (meth)acrylic acid (B) in the presence of at least one esterification catalyst (C) and at least one polymerization inhibitor (D) and also, optionally, of a solvent (E) that forms an azeotrope with water, (o1) optionally removing at least some of the water formed in r1) from the reaction mixture, it being possible for o1) to take place during and/or after r1), (o2) optionally neutralizing the reaction mixture, (o3) if a solvent (E) has been used, optionally removing this solvent by distillation and/or (o4) stripping with a gas which is inert under the reaction conditions, (r2) reacting the reaction mixture obtained after the last of the above reaction steps with a compound (G) containing at least two epoxy groups, optionally in the presence of a catalyst (H), and (r3) reacting the reaction mixture from (r2) with at least one polyisocyanate (J) and at least one hydroxyalkyl (meth)acrylate (K) and optionally with at least one further compound (M) which contains one or more isocyanate-reactive groups, in the presence of a catalyst (L), with the proviso that the catalyst (L) used in step (r3) is a bismuth-containing catalyst.

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