| 摘要 |
A polyolefin wax for a coating material which includes an ethylene (co)polymer having a number-average molecular weight within the range of from 400 to 5000 as measured by gel permeation chromatography. The polyolefin wax has a volume average particle diameter in the range of from 0.3 mum to 20 mum wherein the relation between a particle diameter a (mum), in which the weight ratio of the large particle diameter side in weight particle-size distribution is 10%, and a particle diameter b (mum), in which the weight ratio of the small particle diameter side in weight particle size distribution is 10%, satisfies the a/b<=4 and the relation between the crystallization temperature Tc (° C.), measured at a cooling rate of 2° C./min) as measured by differential scanning calorimetry (DSC) and the density D (kg/m<3>) as measured by the density gradient tube method satisfies the equation 0.501xD-366>=Tc. A printing ink composition the polyolefin wax and an liquid dispersion containing particles of an ethylene polymer composition are also set forth.
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