A process for the continuous production of an .epsilon.-caprolactone polymer characterized by including heating an .epsilon.-caprolactone under reduced pressure or in an inert gas stream to volatilize the unreacted .epsilon.-caprolactone from the polymer and cooling the vapor phase part containing the matter volatilized to thereby recover the unreacted .epsilon.-caprolactone, wherein the amount of the .epsilon.-caprolactone to be recovered is regulated to larger than 5 times by weight the amount of caprolactone dimer.

 
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< Polyalkenyl ether resin

> Process for preparing optically active 3-(methylamino)-1-(2-thienyl) propan-1-ol and intermediates for preparation

> Bifunctional phenylene ether oligomer, its derivatives, its use and process for the production thereof
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