Article having coating on substrate, coating composition, and coating method
AssigneesEssilor International (Compagnie Generale d'Optique), Nikon Corporation
InventorYukiko Katayama
Life of this patent
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Abstract
Provided is a coating technology additionally excellent in, for example, water repellency, oil repellency, and ease of dirt removal. An article having a coating on a substrate, in which the coating contains: (a) a polyhedral oligomeric silsesquioxane; and (b) an acrylate polymer having a structural unit represented by the following general formula (II): where Ra represents a hydrogen atom or a methyl group, Rf represents —CH2—(CF2)q—CF3 or —CH(CF3)2, and q represents an integer of 0 to 8.
Claims13
An article having a coating on a substrate, wherein the coating comprises:
- (a) a polyhedral oligomeric silsesquioxane;
- and
- (b) an acrylate polymer having a structural unit represented by the following general formula (II):
- where Ra represents a hydrogen atom or a methyl group, Rf represents —CH2—(CF2)q—CF3 or —CH(CF3)2, and q represents an integer of 0 to 8,
- wherein the coating comprises the polyhedral oligomeric silsesquioxane at least in the following proportion X:
- the proportion X refers to, in “profile where as the proportion of the polyhedral oligomeric silsesquioxane increases, a liquid droplet sliding angle on a surface of a coating film decreases or temporarily increases and then decreases, but a change in the decrease gradually becomes smailler,” a proportion at a starting point at which the change becomes smaller.
A coating composition, comprising:
- (a) a polyhedral oligomeric silsesquioxane represented by the general formula (I);
- (b) an acrylate polymer having a structural unit represented by the general formula (II);
- and
- (c) a solvent for dissolving the polyhedral oligomeric silsesquioxane and the acrylate polymer:
- where R represents —(CH2)2—(CF2)p—CF3, and p represents an integer of 0 to 9;
- where Ra represents a hydrogen atom or a methyl group, Rf represents —CH2—(CF2)q—CF3 or —CH(CF3)2, and q represents an integer of 0 to 8,
- wherein the coating comprises the polyhedral oligomeric silsesquioxane at least in the following proportion X:
- the proportion X refers to, in “profile where as the proportion of the polyhedral oligomeric silsesquioxane increases, a liquid droplet sliding angle on a surface of a coating film decreases or temporarily increases and then decreases, but a change in the decrease gradually becomes smailler,” a proportion at a starting point at which the change becomes smaller.
Dependencies are inferred from the claim text.