Irgacure 184 1-Hydroxy-cyclohexyl-phenyl-ketone 947-19-3 Ciba Photoinitiator Acrylic/Acrylate Resins Polyurethane Coatings >> UV / Radiation Curing IRGACURE 184 is a highly efficient non-yellowing photoinitiator which is used to initiate the photopolymerisation of chemically unsaturated prepolymers - e.g. acrylates - in combination with mono- or multifunctional vinyl monomers. IRGACURE 184 may be used after adequate testing for applications such as UV curable clear coatings based on acrylates for paper, metal and plastic materials. IRGACURE 184 is especially recommended when UV coatings are required to exhibit only minimal yellowing even after prolonged exposure to sunlight. Yellowing of urethane acrylate systems for outdoor applications, directly exposed to sunlight may be further reduced by adding Ciba’ hindered amine light stabilizer TINUVIN Ò 292. QLWLDWRU Non-yellowing photoinitiator which is used to initiate the photopolymerisation of chemically unsaturated prepolymers - e.g. acrylates - in combination with mono- or multifunctional vinyl monomers. May be used for applications such as UV curable clear coatings based on acrylates for paper, metal and plastic materials. Recommended when UV coatings are required to exhibit only minimal yellowing even after prolonged exposure to sunlight. Yellowing of urethane acrylate systems for outdoor applications, directly exposed to sunlight may be further reduced by adding hindered amine light stabilizer. Recommended usage level: 2.0-4.0% for 5 - 20 mm film thickness, 1.0-3.0% for 20 - 200 mm film thickness .