vinyl alcohol copolymers containing cationic groups, which can be used in papermaking, and process for their preparation

PREPARED ON CATIONIC COPOLYMERS SOLUBLE IN WATER, INTERESTING TO INCREASE STRENGTH OF PAPER WHICH INCLUDE UNIT STATEMENT comonomers be represented by RESPECTIVELY FOLLOWING FORMS: (CF DRAWING IN BOPI) (CF DRAWING IN BOPI) wherein R is H or lower alkyl; B IS (CF DRAWING IN BOPI) ARE EACH INDEPENDENTLY I RENT LOWER ALKYL OR LOWER WITH A SUBSTITUTED; X IS A FORM CAPABLE ANION SALT WITH NITROGEN AMMONIA; AND RADICAL IS A LIE THAT THE ATOM OF NITROGEN CONTENT IN THE ATOM BA NITROGEN AMIDO.