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Silicones are used by tlie textile industry priiiiarily to iiiipnrt durable water repellency and a unique, soft hand to fabrics. To perinit silicone water repellency to better witlistaiitl the severe ~a(inderiiig conclitions to diicIi cotton textiles are noriiia~~y subjected, a bifunctiotial coupling agent ~v a s synthesized for use with stantlard textile einulsions. This silosane polymer contains siloxaiie-reactive and cellulose-reactive groups whicli give it the potential of reaction with both the silicone water repellent film and tlie cotton surface. Its effect is apparent in the greater Iauiitlering durability of the properties imparted to the cottoii by the silicone. The use of the coupling agent in silicone waterrepellent systems for cotton is illustrated by data from laboratory and coiiiiiiercial finishing plant trials.

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