abstract |
The invention relates to a silicone-polyether copolymer which has the formula X g [Z y Y o ] c , wherein each X represents an independently selected silicone moiety having a particular structure, each Y represents an independently selected polyether moiety, each Z represents an independently selected siloxane moiety, the index c is from 1 to 150, the index g is> 1, and each index j and o are independently> 0 and <2, provided that j + o = 2 in each indicated fraction by the index c. The invention also relates to a process for preparing the silicone-polyether copolymer, and comprises reacting a polyether compound, a chain extended organosilicon compound, and a terminal styling organosilicon compound in the presence of a hydrosilylation catalyst. The invention also relates to a sealant, the sealant comprising the silicone-polyether copolymer and a condensation reaction catalyst. |