US 11,866,600 B2
Method for forming coating film
Teruyuki Fukuda, Wakayama (JP)
Assigned to KAO CORPORATION, Tokyo (JP)
Appl. No. 17/311,066
Filed by KAO CORPORATION, Tokyo (JP)
PCT Filed Nov. 22, 2019, PCT No. PCT/JP2019/045886
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/116215, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-230171 (JP), filed on Dec. 7, 2018.
Prior Publication US 2022/0041882 A1, Feb. 10, 2022
Int. Cl. C09D 11/54 (2014.01); B41M 7/00 (2006.01); C09D 11/033 (2014.01); C09D 11/102 (2014.01); C09D 11/107 (2014.01); C09D 11/30 (2014.01)
CPC C09D 11/54 (2013.01) [B41M 7/0027 (2013.01); C09D 11/033 (2013.01); C09D 11/102 (2013.01); C09D 11/107 (2013.01); C09D 11/30 (2013.01)] 20 Claims
OG exemplary drawing
 
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.