| abstract |
The present invention relates to silicon-modified vinyl acetate ethylene copolymers, and to emulsions, articles of manufacture and cementitious waterproofing compositions based on the copolymers. The silicon-modified vinyl acetate ethylene copolymer comprises: (i) 60 wt% to 95 wt% vinyl acetate units; (ii) 0.1 wt% to 35 wt% ethylene units; and (iii) 0.1 wt% to 5 wt% of units derived from a silicon compound of formula (I); wherein R 1 is a terminally unsaturated alkenyl group; and R 2 , R 3 and R 4 are each independently selected from hydrogen, alkyl, substituted alkyl, heteroalkane group, substituted heteroalkyl, cyclyl, substituted cyclyl, heterocyclyl, substituted heterocyclyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl , and wherein the silicon content bound to the silicon-modified vinyl acetate ethylene copolymer is 0.06 wt % to 0.29 wt %. |