Patent ID: 6696504
Filing Date: 2004-02-24
Classification: C08J,Y10S

Abstract:
A method for producing an extruded styrene resin foam, comprising heat-melting, and kneading a styrene resin, introducing a blowing agent into the styrene resin under pressure and conducting extrusion foaming, wherein the blowing agent consists essentially of 40% by weight or more and 65% by weight or less, based on the whole amount of the blowing agent, of at least one ether selected from the group consisting of dimethyl ether, methyl ethyl ether and diethyl ether, and 35% by weight or more and 60% by weight or less, based on the whole amount of the blowing agent, of at least one saturated hydrocarbon selected from the group consisting of saturated hydrocarbons having 3 to 5 carbon atoms.