Patent ID: 8715889
Filing Date: 2014-05-06
Classification: C08G,G03F,G03H,G11B,Y10T

Abstract:
1. A polyurethane composition suitable for printing comprising A) a polyisocyanate component, which comprises an NCO-terminated polyurethane prepolymer, wherein said NCO-terminated polyurethane prepolymer comprises NCO groups that are primarily aliphatically bonded and wherein said NCO-terminated polyurethane prepolymer is based on a hydroxy-functional compound having an OH functionality in the range of from 1.6 to 2.05; B) an isocyanate-reactive polyetherpolyol; C) a urethane acrylate and/or urethane methacrylate having at least one aromatic structural unit and a refractive index of greater than 1.50 at 405 nm, wherein said urethane acrylate and/or urethane methacrylate is free of NCO groups and OH groups; D) a free radical stabilizer; E) a photoinitiator comprising a borate salt and one or more dyes having absorption bands which at least partly cover the spectral range of from 400 to 800 nm; F) optionally a catalyst; and G) one or more auxiliaries and/or additives comprising a polyester-modified polydimethylsiloxane, a fluorine-modified polymer, a foam-destroying polysiloxane, a hydrophobic solid, a hydrophobic emulsifier, a polyether-modified polymethylalkylsiloxane, a non-ionic polyacrylate copolymer, or mixtures thereof.