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In the case of containing a silicon atom, the hydrophobic resin (HR) is preferably a resin having, as a silicon atom› containing partial structure, an alkylsilyl structure (prefer- ably a trialkylsilyl group) or a cyclic siloxane structure. 

The alkylsilyl structure or cyclic siloxane structure specifi› cally includes, for example, the groups represented by the following formulae (CS-1) to (CS-3): 

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In formulae (CS-1) to (CS-3), each ofR$_{12 }$to R$_{26 }$indepen› dently represents a linear or branched alkyl group (preferably having a carbon number of 1 to 20) or a cycloalkyl group (preferably having a carbon number of 3 to 20). 

Each of L$_{3 }$ to L$_{5 }$ represents a single bond or a divalent linking group. The divalent linking group includes a single group or a combination of two or more groups, selected from the group consisting of an alkylene group, a phenylene group, an ether group, a thioether group, a carbonyl group, an ester group, an amide group, a urethane group and a urea group. 

n represents an integer of 1 to 5. n is preferably an integer of2 to 4. 

Specific examples of the repeating unit having a group represented by formulae (CS-1) to (CS-3) are illustrated below, but the present invention is not limited thereto. In specific examples, X$_{1 }$ represents a hydrogen atom, ----CH$_{3}$ , -F or --CF 3 • 

