| 摘要 |
<p>Monoethylenically unsaturated quaternary monomers of the formula <CHEM> wherein R<1> is a (C1 - C4) straight chain alkyl group optionally hydroxy-substituted, n is 0 or 1, R<2> is H or OH, R<3> is an alkenoxy group containing an allyl group or a carbalkenoxy group containing a double bond functionally equivalent to an isolated terminal double bond, X is halo and Y is an anion may be readily polymerisable with vinyl acetate to provide latices capable of low energy cure. The invention embraces addition polymers of such monomers and methods of producing both the monomers and the polymers. The monomers and polymers are stable at acid pH values. At alkaline pH values they become self-reactive, the polymers crosslink slowly even at room temperature, with the crosslinking increasing rapidly on heating. The polymers are useful, inter alia, as wet-strength agents in the making of paper.</p> |
