FLUORINATED BLOCK COPOLYMER AND PROCESS FOR ITS PRODUCTION, AND SURFACE TREATMENT AGENT

摘要

A fluorinated block copolymer having Rf groups with at most 6 carbon atoms, and a surface treatment agent containing such a copolymer, whereby a coating film excellent in both static liquid repellency and dynamic liquid repellency can be formed. The fluorinated block copolymer comprises a fluorinated moiety (A) having units (a) derived from a specific fluorinated monomer and a non-fluorinated moiety (B) having units (b) derived from a non-fluorinated monomer, wherein to all units, the proportion of the above units (a) is from 15 to 40 mol %, and the proportion of the above units (b) is from 60 to 85 mol %; a process for its production; and a surface treatment agent containing the fluorinated block copolymer.

主权项

1. A fluorinated block copolymer comprising a fluorinated moiety (A) having units (a) derived from a monomer represented by the following formula (1) and a non-fluorinated moiety (B) having units (b) derived from a non-fluorinated monomer, of which a homopolymer would have a glass transition temperature of at least 30° C., wherein to all units, the proportion of the above units (a) is from 15 to 40 mol %, and the proportion of the above units (b) is from 60 to 85 mol %:in the formula (1), Y is a C1-4 aliphatic group, and R is a C4-6 linear or branched fluoroalkyl group.