| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid (meth)acrylic polymer having a higher polymerization degree and a polymerization ratio compared with conventional polymers. <P>SOLUTION: The polymer has a structural unit shown by formula (1), wherein the relationship between a gel part ratio G(%) obtained from a mass of parts insoluble in ethyl acetate and the weight average molecular weight Mw (10,000) is shown by the formula of Log (Mw)>Log 30-0.015 G, and in formula (1) R<SB>1</SB>is H or CH<SB>3</SB>, R<SB>2</SB>is CH<SB>3</SB>or C<SB>2</SB>H<SB>5</SB>, R<SB>3</SB>is H, CH<SB>3</SB>or C<SB>2</SB>H<SB>5</SB>and n is a natural number of 5-23. <P>COPYRIGHT: (C)2007,JPO&INPIT |
