Coating composition
AssigneeDaikin Industries, Ltd.
InventorsHiromichi Momose, Hiroshi Torii, Seitaro Yamaguchi
Life of this patent
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Abstract
A coating composition which is an aqueous dispersion of a fluororesin particle (A) including a fluororesin, a resin particle (B) the decomposition and vaporization of which begin at a temperature not higher than a decomposition temperature of the fluororesin, and a nonionic surfactant (C) in an aqueous medium. The aqueous dispersion contains the resin particle (B) in an amount of 5 to 25 parts by mass based on 100 parts by mass of the fluororesin particle (A) and a fluorine-containing surfactant in an amount smaller than 500 ppm relative to the fluororesin particle (A).
Claims10
A coating composition which is an aqueous dispersion comprising, in an aqueous medium, a fluororesin particle (A) comprising a fluororesin, a resin particle (B) the decomposition and vaporization of which begin at a temperature not higher than a decomposition temperature of the fluororesin and a nonionic surfactant (C2) having an HLB value of not lower than 9.0 but not higher than 10.0 and
- represented by the general formula (II):
- Rb—O—A—H (II)
- wherein Rb represents a straight or branched, saturated or unsaturated acyclic aliphatic hydrocarbon group containing 10 to 14 carbon atoms or a saturated cycloaliphatic hydrocarbon group containing 10 to 14 carbon atoms and A represents a polyoxyalkylene chain consisting of 3 to 6 oxyethylene groups and 0 to 3 oxypropylene groups, and
- wherein the aqueous dispersion contains the resin particle (B) in an amount of 7% to 15% by mass relative to the fluororesin particle (A), the nonionic surfactant (C2) in an amount of 0.1% to 3% by mass relative to the fluororesin particles (A) and a fluorine-containing surfactant in an amount smaller than 100 ppm relative to the fluororesin particle (A).
A method of producing a coating composition,
- which comprises the step of admixing an aqueous dispersion comprising fluororesin particle (A) comprising a fluororesin, a nonionic surfactant (C1) having an HLB value exceeding 10.0 but not exceeding 16.0 and a fluorine-containing surfactant and having the fluorine-containing surfactant content lower than 100 ppm relative to the fluororesin particle (A), with
- a nonionic surfactant (C2) having an HLB value of not lower than 9.0 but not higher than 10.0 and represented by the general formula (II):
- Rb—O—A—H (II)
- wherein Rb represents a straight or branched, saturated or unsaturated acyclic aliphatic hydrocarbon group containing 10 to 14 carbon atoms or a saturated cycloaliphatic hydrocarbon group containing 10 to 14 carbon atoms and A represents a polyoxyalkylene chain consisting of 3 to 6 oxyethylene groups and 0 to 3 oxypropylene groups, and
- and a resin particle (B) the decomposition and vaporization of which begin at a temperature not higher than the decomposition temperature of the fluororesin,
- wherein the aqueous dispersion contains the nonionic surfactant (C1) in an amount of 0.1% to 10% by mass relative to the fluororesin particle (A),
- wherein the nonionic surfactant (C2) is incorporated in an amount of 0.1 to 3% by mass relative to the fluororesin particular (A), and
- wherein the resin particle (B) is incorporated in an amount of 7% to 15% by mass relative to the fluororesin particle (A).
Dependencies are inferred from the claim text.