in which 

Ar2 represents an aromatic ring, in which a substituent other than -(A-B) groups may further be introduced, 

p is an integer of 1 or greater, 

A represents a single bond or any one, or a combination of two or more members selected from among an alkylene group, -0-, -S-, ----C(=0)-, -C(=0)0 -, -S(=0)-, -S(=0)2-and -OS (=0)2-, 

B represents a group containing an aliphatic group hav- ing 3 or more carbon atoms, 

provided that when pis 2 or greater, a plurality of-(A-B) groups may be identical to or different from each other, and 

* * * * * 

