| 摘要 |
The invention provides a printing ink composition comprising a pigment or pigment preparation, a thermoplastic resin, water, a water-soluble solvent, and, as inhibitor for preventing the foaming of a foamable material containing a blowing agent, an azole of the formula <IMAGE> wherein A is a benzene or naphthalene radical, X is a nitrogen atom or the <IMAGE> group, wherein R is a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, R1 is an alkyl or alkenyl group, each of 1 to 20 carbon atoms, a hydroxyalkyl group of 2 to 20 carbon atoms, an alkoxyalkyl or cyanoalkyl group, each of 3 to 20 carbon atoms, a cycloalkyl group of 5 to 12 carbon atoms, or a phenalkyl group of 7 to 9 carbon atoms, R2 has the same meaning as R1 and can in addition be hydrogen, or R1 and R2, together with the nitrogen atom to which they are attached, form a heterocyclic ring. The inhibitors employed in the printing ink compositions of this invention have the advantage that they do not require a pH regulator, i.e. they can also be used for printing inks having a pH lower than 8, and have the further advantage that they can be more easily incorporated in printing ink compositions, have a better compatibility with aqueous acrylic resins, a better stability in PVC latices, have less influence on the viscosity and have a lower toxicity than aminotriazoles. |
