prov:value
| - The cationic water-soluble prepolymers that are particularly suitable for use in this invention are addition-type polymers prepared from ethylenically unsaturated cationic monomers having the formulas (I), (II), (III), (IV), (V) and (VI) below. ##STR10## In formula (I), R1 is hydrogen or methyl, R2 is hydrogen or a C1 -C4 alkyl such as methyl, ethyl, propyl, or butyl; R3 is hydrogen, ##STR11## whe
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