| 摘要 |
A coating agent for preventing nonspecific adsorption of a substance, which comprises a water-soluble copolymer (P) comprising a repeating unit (A) represented by the following formula (1): wherein R0 represents a hydrogen atom or a methyl group and X represents a group represented by the following formula (1a): wherein R1 and R2 independently represent a hydrogen atom or unsubstituted or substituted an alkyl group having from 1 to 8 carbon atoms or formula (1b): wherein R3 and R4 independently represent a single bond, substituted or unsubstituted methylene or substituted or unsubstituted divalent alkylene group having from 2 to 7 carbon atoms wherein total of the number of carbon atoms of R3 and R4 is from 4 to 10, and Y represents any one of a single bond, O and S; a repeating unit (B) represented by the following formula (2): wherein R5 represents a hydrogen atom or a methyl group and Z represents an organic group containing at least one aldo group or keto group; and a hydrazide compound (H) comprising at least two hydrazino groups per one molecule.
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