content_image/932745.jpg content_image/932746.jpg content_image/932747.jpg content_image/932748.jpg content_image/932749.jpg
<img src='content_image/932745.jpg'>

<img src='content_image/932746.jpg'>

Preferred examples of the carboxylic acid groups- containing monomer represented by the general formula (5) are as follows. 

<img src='content_image/932747.jpg'>

Preferred examples of the carboxylic acid groups› containing monomer represented by the general formula (6) are as follows. 

<img src='content_image/932748.jpg'>

<img src='content_image/932749.jpg'>

