US 2003/0171481 A1 · Polyolefin wax for coating material, printing ink composition, ethylene polymer composition dispersion and use thereof

Abstract

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 μm to 20 μm wherein the relation between a particle diameter a (μm), in which the weight ratio of the large particle diameter side in weight particle-size distribution is 10%, and a particle diameter b (μm), 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/m3) as measured by the density gradient tube method satisfies the equation 0.501×D-366≧Tc. A printing ink composition the polyolefin wax and an liquid dispersion containing particles of an ethylene polymer composition are also set forth.

Claims9

Dependent claims

A Polyolefin wax (B) for a coating material, characterized by comprising an ethylene (co)polymer (A), wherein the number-average molecular weight (Mn) is within the range of from 400 to 5000 as measured by gel permeation chromatography (GPC), the volume-average particle diameter is in the range of from 0.3 μm to 20 μm, the relation between a particle diameter a (μm), in which the weight ratio of the large particle diameter side in weight particle-size distribution is 10%, and a particle diameter b (μm), in which the weight ratio of the small particle diameter side in weight particle size distribution is 10%, satisfies the following equation (I):

a/b≦4 (I),
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/m3)) as measured by the density gradient tube method satisfies the following equation (II):
0.501×D-366≧Tc (II).

An ethylene polymer composition aqueous dispersion, characterized by the fact that particles of an ethylene polymer composition comprise:

(A) an ethylene polymer which is an ethylene homopolymer or an ethylene/α-olefin copolymer, in which the number-average molecular weight (Mn) is within the range of from 400 to 8000 as measured by gel permeation chromatography (GPC), Mw/Mn is no greater than 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/m3)) as measured by the density gradient tube method satisfies the following equation (II):
0.501×D-366≧Tc (II),
and
(C) a modified ethylene polymer which is a modified ethylene polymer obtained by modifying an ethylene homopolymer or an ethylene/α-olefin copolymer with an unsaturated carboxylic acid or a derivative thereof or a sulfonate, in which the amount of the modification by the unsaturated carboxylic acid or the derivative thereof, defined by KOH titration, is from 30 to 100 mg KOH per 1 g of modified polymer, or the amount of modification by the sulfonate is from 0.1 to 50 mmol, in an amount of —SO3—, per 1 g of modified polymer,
are dispersed in water.

2 more elements

Dependencies are inferred from the claim text.

Polyolefin wax for coating material, printing ink composition, ethylene polymer composition dispersion and use thereof

Life of this patent

Polyolefin wax for coating material, printing ink composition, ethylene polymer composition dispersion and use thereof

Life of this patent

Abstract

Claims9