| abstract |
The present invention relates to a surface treatment agent containing a perfluoro(poly)ether group-containing compound represented by formula (A): Rf-(PFPE-Z 1 -Y-Z 2 ) n -R. In the formula, Rf represents an alkyl group having 1 to 16 carbon atoms that may be substituted by one or more fluorine atoms; PFPE is independently -(OC 6 F 12 ) a -(OC 5 F in each occurrence. 10 ) The group represented by b -(OC 4 F 8 ) c -(OC 3 F 6 ) d -(OC 2 F 4 ) e -(OCF 2 ) f -; Z 1 and Z 2 are each independently a single bond or a divalent organic group; Y independently represents a group containing at least one -O- in each occurrence; wherein, there is at least one structure in which two or more oxygen atoms are continuous in formula (A); n is an integer from 1 to 400; R is a hydrogen atom, a fluorine atom, -CF 2 -Cl, -COF, -COOH, -PFPE-Rf' or Rf';Rf' has the same meaning as Rf. |