| 摘要 |
The invention comprises an adhesion promoter for a printing ink and a printi ng ink comprising the adhesion promoter. The adhesion promoter comprises the product of reacting together (a) a solution of a polymer or synthetic resin (b) a sulphonic acid or a derivative of a sulphonic acid, and (c) a metal compound selected from one or more of the group consisting of a metal halide , metal alkoxide, metal halo-alkoxide or a condensed metal alkoxide, wherein t he metal is selected from titanium or zirconium.
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