Patent ID: 6984711

Claim:
A method for producing a cyclic polysulfide having the formula (I): wherein x is an integer of 2 to 6, n is an integer of 1 to 15, and R indicates a substituted or unsubstituted C 2 to C 18 alkylene group or a substituted or unsubstituted C 2 to C 18 alkylene group containing an oxyalkylene group comprising: reacting a dihalogen compound having the formula X—R—X, wherein X independently indicates a halogen atom, and R indicates a substituted or unsubstituted C 2 to C 18 alkylene group or a substituted or unsubstituted C 2 to C 18 alkylene group containing an oxyalkylene group and an alkali metal polysulfide having the formula M 2 S x , wherein M indicates an alkali metal and x is an integer of 2 to 6 by a two-phase system in a incompatible mixed solvent of a hydrophilic and lypophilic solvent.