| 摘要 |
<p>A jet ink composition curable by exposure to ultra violet and used in the method for producing visible indicia on substrates, such as glass, metals and polymers comprises (A) between 10 and 70% by weight of an epoxy resin selected from (i) diglycidyl ethers of bisphenol A, said resin being predominately the monomer thereof, (ii) polyepoxidized phenol of cresol novolacs, (iii) diepoxide ethers or esters having two epoxy cycloalkyl groups (iv) polyglycidyl ethers of polyhydric alcohols, and (v) combinations thereof, said epoxy resin and having an epoxy equivalent weight of less than 300; (B) 1 to 12% by weight of a photoinitiator capable of rapidly polymerizing the epoxy resins and of the type that provides a Lewis acid effective to initiate the polymerization reaction upon exposure to ultra-violet light (C) less than 2% by weight of pigment or dye that does not adversely affect during of said resins, and a solvent blend containing solvents selected from aliphatic alcohols of one to five carbon atoms, alkyl ketones of two to five carbon atoms, aromatic hydrocarbons of benzene, toluene and xylene, propylene carbonate, ethylene glycol ethers of 3 or 4 carbon atoms, and alkyl acetates of 2 to 4 carbon atoms. The method involves exposing deposited indicia to ultra violet light to cure the indicia within a tack free time of less than 30 seconds.</p> |
