Coating film
AssigneeDaikin Industries, Ltd.
InventorsHiroki YAMAGUCHI, Kensuke MOHARA, Gregory TORTISSIER, Masamichi MORITA
Life of this patent
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Abstract
An object, of the present invention is to provide a new liquid-repellent coating film. This object can be achieved by a coating film that has a fluorine content of less than 1 wt %, a water contact angle (droplet: 2 μL) of 115° or more, and a water contact angle of 300° or more after surface friction with a PET film (under a load of 100 gf/cm2; 1500 reciprocations); and that satisfies at least one of the following regarding surface roughness indices: (a) an average surface roughness Ra of 1.6 μm or more; and (b) a Wenzel roughness factor of 1.2 or more.
Claims30
A coating film having
- a fluorine content of less than 1 wt %,
- a water contact angle (droplet:
- 2 μL) of 115° or more, and
- a water contact angle of 100° or more after surface friction with a PET film (under a load of 100 gf/cm2;
- 1500 reciprocations), and
- satisfying at least one of the following regarding surface roughness indices:
- (a) an average surface roughness Ra of 1.6 μm or more;
- and
- (b) a Wenzel roughness factor of 1.2 or more.
A composition comprising
- (A) at least one modified fine particle
- comprising
- a core fine particle and
- one or more polymerizable groups (a) on the surface of the particle,
- and not containing fluorine;
- and
- (Bs) at least one compound containing one polymerizable group (b) in the molecule, and not containing fluorine.
A composition comprising a polymer containing structural units derived from
- (A) at least one modified fine particle comprising a core fine particle and one or more polymerizable groups (a) on the surface of the particle, and not containing fluorine;
- and
- (Bs) at least one compound containing one polymerizable group (b) in the molecule, and not containing fluorine.
A kit comprising
- (A) at least one modified fine particle comprising a core fine particle and one or more polymerizable groups (a) on the surface of the particle, and not containing fluorine;
- and
- (Bs) at least one compound containing one or more polymerizable groups (b) in the molecule, and not containing fluorine;
- and further containing
- (Bm) at least one compound containing two or more polymerizable groups (b) in the molecule, and not containing fluorine, the compound (Bm) being disposed apart from the modified fine particle (A) and compound (Bs).
A method for subjecting an article to a liquid repellent treatment, comprising applying, to a part of the surface or to the entire surface of the article,
- (A) at least one modified fine particle comprising a core fine particle and one or more polymerizable groups (a) on the surface of the particle, and not containing fluorine;
- and
- (B) at least one compound containing one or more polymerizable groups (b) in the molecule, and not containing fluorine;
- or
- a reaction product of particle (A) and compound (B);
- and
- (Bm) at least one compound containing two or more polymerizable groups (b) in the molecule, and not containing fluorine.
A coating composition comprising at least one member selected from the group consisting of:
- (A) at least one modified fine particle comprising a core fine particle and one or more polymerizable groups (a) on the surface of the particle, and not containing fluorine;
- and
- (B) at least one compound containing one or more polymerizable groups (b) in the molecule, and not containing fluorine;
- or
- a reaction product of particle (A) and compound (B);
- and
- (Bm) at least one compound containing two or more polymerizable groups (b) in the molecule, and not containing fluorine.
A composition for liquid-repellent treatment comprising at least one member selected from the group consisting of:
- (A) at least one modified fine particle comprising a core fine particle and one or more polymerizable groups (a) on the surface of the particle, and not containing fluorine;
- and
- (B) at least one compound containing one or more polymerizable groups (b) in the molecule, and not containing fluorine;
- or
- a reaction product of particle (A) and compound (B);
- and
- (Bm) at least one compound containing two or more polymerizable groups (b) in the molecule, and not containing fluorine.
Dependencies are inferred from the claim text.