Reference : Radiation-curing binders and a process for their preparation
Patent : Patent
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
Radiation-curing binders and a process for their preparation
Weikard, Jan [ > > ]
Greszta-Franz, Dorota [ > > ]
Fischer, Wolfgang [ > > ]
Schmitz, Joerg [ > > ]
Mundstock, Holger [ > > ]
Detrembleur, Christophe mailto [> Bayer AG > > >]
JP 2006097021
DE200410043538 20040909
Bayer AG
C08F299/06; C08G18/67; C09D175/14; C09D4/00
C08G18/67B4; C08G18/78B4K; C08G18/79K; C08G18/80B3D; C08G18/81K3B2; C09D175/14; C09D175/16
[en] PROBLEM TO BE SOLVED: To provide a process for preparing a binder which contains (1) an allophanate group, (2) a group that reacts with an ethylenically unsaturated compound with polymerization on exposure to actinic radiation (radiation-curing group) and (3) optionally an NCO-reactive group; and to provide the binder obtained by the process. ; SOLUTION: The process comprises reacting at a temperature <=130[deg.]C, (A) one or more NCO-functional compounds containing uretdione groups with (B) one or more compounds that contain isocyanate-reactive groups and radiation-curing groups and then (C) with one or more saturated hydroxy-containing compounds other than (B), at least one of these compounds having an OH functionality of >=2, in the presence of (D) a catalyst containing one or more zinc compounds, the reaction with compounds (C) taking place at least proportionally with the formation of allophanate groups.

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