公开(公告)号：DE59813077D1

公开(公告)日：2006-02-09

申请号：DE59813077

申请日：1998-09-21

Applicant: BASF AG

Inventor： SCHWALM DR ,  KOENIGER DR ,  PAULUS DR ,  REICH DR ,  BECK DR ,  LOKAI DR ,  MENZEL KLAUS

IPC: B05D3/06 ,  B05D7/14 ,  C08F290/06 ,  C08G18/10 ,  C08G18/12 ,  C08G18/67 ,  C08G18/72 ,  C08G18/73 ,  C08G18/78 ,  C08G18/79 ,  C08G18/81 ,  C09D5/00 ,  C09D175/04 ,  C09D175/16

Abstract: Radiation-curable urethane prepolymers are made from a mixture in which the isocyanate component contains two different trifunctional isocyanates or one tri- and one di-functional isocyanate, or the unsaturated polyol component contains at least two different unsaturated compounds with reactive hydroxyl groups and possibly other hydroxy compounds. A process for the production of radiation-curable, urethane group-containing prepolymers (PU) comprises reacting an isocyanate component (A) containing trifunctional isocyanate(s) (A1) and optionally difunctional isocyanate(s) (A2) with a polyol component (B) containing unsaturated compound(s) with at least one reactive hydroxyl group (B1) and optionally other OH group-containing compounds (B2), in which either (A) contains two different compounds (A1) or one (A1) and one (A2), or component (B) contains at least two different compounds (B1). Independent claims are also included for the following: (1) radiation-curable urethane prepolymers obtained by this process; (2) radiation-curable preparations containing prepolymers (PU) as above and possibly conventional additives etc.; (3) a process for coating substrates by applying PU or preparations containing PU to the substrate, removing any solvent; and hardening with UV or electron beam radiation; (4) coated substrates obtained by this process.