ELABORATION PROCESS OF DECALCOMANIA, THEIR PRINTING MEANS AND LACQUERS

摘要

1. A process for the production of transfers, especially for the decoration of glass and glazed or unglazed objects of ceramic, metal or the like, in which a decoration of a ceramic pigment paste is applied by printing to a transfer backing paper a subsequently covered by a layer of lacquer, said layer of lacquer comprising monomeres of methycrylate and being hardened by UV-light, characterised in that a) printing media for preparing pigment pastes from ceramic pigments are used having the following composition : a1 ) prepolymers of acrylic polyesters 5 to 45% a2 ) mono-, di- and tri-functional acrylates 0 to 35% a3 ) polymethacrylates with a molecular weight between 95 000 and 150 000 15 to 50% a4 ) monomeres of methacrylates of average and higher molecular weight 20 to 55% a5 ) monomeric plasticisers 0 to 10% a6 ) polymeric plasticisers 0 to 10% a7 ) monomeric solutions of alkyd resins 0 to 15% a8 ) photoinitiator systems of the class consisting of ketals, acrylketones or benzophenones 1 to 5% the sum of components a2 + a5 + a6 + a7 amounting to at least 5% and the sum of all components a1 to a8 mounting to 100% ; b) the layer of lacquer has the following composition b1 ) prepolymeres of acrylic polyesters 5 to 40% b2 ) mono-, di- and trifunctional acrylates 0 to 25% b3 ) polymethacrylates with a molecular weight between 95 000 and 150 000 20 to 45% b4 ) monomeres of methacrylates of average and higher molecular weight 20 to 60% b5 ) monomeric plasticisers 0 to 10% b6 ) polymeric plasticisers 0 to 5% b7 ) monomeric solutions of alkyd resins 0 to 10% b8 ) photoinitiator systems of the classes consisting of ketals, acryl ketones or benzophenones 1 to 8% b9 ) saturated paraffin solution in monomeric methacrylate 0,5 to 3% b10 ) organic dyes soluble in the medium 0,01 to 0,05% b11 ) silicone oil 0,0 to 0,1% b12 ) antiblocking agent 0,0 to 0,1% the sum of components b2 + b5 + b6 + b7 + b9 + b10 + b11 + b12 amounting to at least 1% and the sum of all used components b1 to b12 amounting to 100% ; c) following to mixing a ceramic pigment with the printing medium according a) said printing medium is hardened by means of UV-radiation and in that following to applying a layer of lacquer according b) onto the hardened pigment layer said layer of lacquer also is hardened by means of UV-radiation.