Patent ID: 7329696
Filing Date: 2008-02-12
Classification: C08J

Abstract:
1. An aqueous dispersion comprising particles of at least one resin selected from the group consisting of a polyaddition resin, a polycondensation resin, an addition condensation resin, a ring-opening-polymerization resin and an addition polymerization resin; wherein the particles exhibit at least two peaks in a particle diameter distribution curve; at least one peak of the peaks comprises at least one resin selected from the group consisting of a polyaddition resin, a polycondensation resin, an addition condensation resin and a ring-opening-polymerization resin; the aqueous dispersion satisfies one or both of the following (i) and (ii): (i) wherein in a particle diameter distribution curve for the aqueous dispersion, a highest peak (P1) and a second highest peak (P2) exhibit the particle distribution curved exhibits the following properties: a ratio of a particle diameter corresponding to a maxima of (P1) to a particle diameter corresponding to a maxima of (P2) is in a range of 2/1 to 100/1; a ratio of a particle count value at a maximum height of (P1) to a particle count value at a maximum height of (P2) is in a range of 1/1 to 10/1, (P1) and (P2) have a peak variation coefficient of a peak of 0.1 to 150%, (P1) and (P2) have a skewness of −10 to 10 and (P1) and (P2) have a kurtosis of 0 to 10, and (ii) if a concentration range of an aqueous dispersion is 20 to 70% by weight, the aqueous dispersion satisfies the following relation equation (1) having a coefficient A of −2 to 0 and a constant item B of 1 to 5: wherein η0 and η represent a Brookfield viscosity (mPa·s, 25° C.) of water and the aqueous dispersion having a resin concentration of φ% by weight.