Chlorinated polyether and polyurethane obtained therefrom

A process for producing a chlorinated polyether, the process comprising conducting ring-opening polymerization of a chlorinated epoxy compound represented by the following formula (3) in the presence of an acid catalyst in the range of 1×10−5 to 0.1 mol per mol of the chlorinated epoxy compound represented by the formula (3) using as a polymerization initiator an active hydrogen-containing compound which is at least one selected from the group consisting of ethylene glycol, propylene glycol, glycerol, pentaerythritol and sorbitol;

• wherein the amount of polymerization initiator provides 0.02 to 1.5 mol of active hydrogen per mol of the chlorinated epoxy compound represented by the formula (3),
• wherein the acid catalyst is selected from the group consisting of a boron halide compound and an organoboron compound, and
• the chlorinated polyether consists of:
• repeating units of a chlorinated-ether residue represented by the following formula (1) and a chlorinated-ether residue represented by the following formula (2);
• residue units derived from said polymerization initiator;
• and
• hydroxyl groups at the ends of the chlorinated polyether;
• wherein a molar ratio of the chlorinated-ether residue represented by the following formula (1) to the chlorinated-ether residue represented by the following formula (2) is from 20/80 to 80/20,