Patent ID: 11866600
Assignee: KAO CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method for forming a coating film, the method comprising:
1: applying a liquid composition I comprising a solvent A, a solvent B, and a polymer C to a base material; and
2: applying droplets of a liquid II comprising water to the liquid composition I on the base material as applied in the applying 1, wherein:
a boiling point of the solvent A is lower than 99° C., and a distance Ra of the Hansen solubility parameter of the solvent A to water as expressed by the following equation (1) is 36 or less,
a boiling point of the solvent B is 150° C. or higher, and a distance Ra of the Hansen solubility parameter of the solvent B to water as expressed by the following equation (1) is 40 or more,
the solvent B is compatible with the solvent A,
the polymer C is soluble in the solvent A but insoluble in the solvent B, and
an average diameter d of the droplets applied in the applying 2 is 0.01 μm or more and 50 μm or less,

Ra=(4×ΔD2+ΔP2+ΔH2)0.5  (1)

wherein,
ΔD is a difference of dispersing component in the Hansen solubility parameter between a solvent and water,
ΔP is a difference of polar component in the Hansen solubility parameter between a solvent and water, and
ΔH is a difference of hydrogen-binding component in the Hansen solubility parameter between a solvent and water.