| 摘要 |
PROBLEM TO BE SOLVED: To provide a new polyphosphoric acid having a plurality of living radical polymerization-initiating groups. SOLUTION: The polyphosphoric acid is expressed by formula [1] [A is a 1-10C alkyl chain or a 1-10C oxyethylene chain; B is a divalent organic group of -(C=O)-O-, -N(-H)-C(=O)- or -N(-H)-C(=O)-O-; R<SB>1</SB>is a 1-2C alkyl; X<SB>1</SB>is a halogen; R<SB>2</SB>is H or a 1-4C alkyl; and (m), (n), (p) and (q) are specified so as to together give a molecular weight of 1,000 to 50,000 to formula]. COPYRIGHT: (C)2005,JPO&NCIPI
|
