| 摘要 |
An amorphous hydroxy- terminated poly(haloalkylene ethers) a resulting from the mixture of: A. a hydroxyl-containing material containing from 1 to 6 hydroxyl groups, B. a haloalkylene oxide, and C. a novel two component catalyst system comprising: (i) HF or HBF4; and (ii) a polyvalent tin compound having the formula: <IMAGE> in which g is 0 or 1; R<5> and R<6> independently represent a saturated or unsaturated aliphatic hydrocarbyl group containing 1 to 10 carbon atoms or an aromatic hydrocarbyl group containing 1 to 10 carbon atoms; R<7> represents an oxygen atom or a saturated or unsaturated aliphatic hydrocarbyl group containing 1 to 10 carbon atoms or an aromatic hydrocarbyl group containing 1 to 10 carbon atoms; provided that when R<7> is oxygen then g is 0; and R<8> represents a fluorine atom, an acyloxy group containing less than 10 carbon atoms, a saturated aliphatic hydrocarbyl group containing from 1 to 10 carbon atoms or <IMAGE> provided than when R<5>, R<6> and R<7> are each saturated aliphatic hydrocarbyl groups then R<8> represents a fluorine atom, an acyloxy group containing less than 10 carbon atoms or <IMAGE> |
