Abstract: The present disclosure provides a novel and practical alcohol and derivatives thereof which have more industrial value than existing petrochemical raw materials. The present disclosure further provides ethanol, characterized in that a peak in gas chromatography measured by gas chromatograph mass spectrometry (GC/MS) has at least one peak with a retention time selected from (A) a peak of 5 minutes 25 seconds to 5 minutes 35 seconds and two peaks of 2 minutes 55 seconds to 3 minutes 5 seconds; (B) a peak of 12 minutes 30 seconds to 12 minutes 40 seconds; (C) a peak of 6 minutes 36 seconds to 6 minutes 45 seconds; and (D) a peak of 15 minutes 00 seconds to 15 minutes 15 seconds.

Abstract: The present invention relates to an extruded styrenic resin foam and a method for producing the same, wherein a base resin composing the extruded styrenic resin foam is a styrenic resin mixture of a styrene-(meth)acrylic ester copolymer, or a combination of a styrene-(meth)acrylic ester copolymer and polymethyl methacrylate, and a styrenic resin except the styrene-(meth)acrylic ester copolymer, and the styrenic resin mixture contains a (meth)acrylic ester component at a ratio of 4 to 45% by weight with reference to the styrenic resin mixture. The present invention provides an extruded styrenic resin foam having an apparent density of 20 to 60 kg/m3, a thickness of 10 to 150 mm, and a low thermal conductivity, and keeping excellent heat insulation performance over a long period of time and flame retardancy, even when the styrenic resin extruded foam is foamed using a blowing agent having an ozone depleting potential of 0 (zero) and a low global warming potential.

Abstract: The present invention relates to an extruded styrenic resin foam and a method for producing the same, wherein a base resin composing the extruded styrenic resin foam is a styrenic resin mixture of a styrene-(meth)acrylic ester copolymer, or a combination of a styrene-(meth)acrylic ester copolymer and polymethyl methacrylate, and a styrenic resin except the styrene-(meth)acrylic ester copolymer, and the styrenic resin mixture contains a (meth)acrylic ester component at a ratio of 4 to 45% by weight with reference to the styrenic resin mixture. The present invention provides an extruded styrenic resin foam having an apparent density of 20 to 60 kg/m3, a thickness of 10 to 150 mm, and a low thermal conductivity, and keeping excellent heat insulation performance over a long period of time and flame retardancy, even when the styrenic resin extruded foam is foamed using a blowing agent having an ozone depleting potential of 0 (zero) and a low global warming potential.

Abstract: A process for an extruded resin foam, comprising extruding a foamable composition comprising a melted polystyrene resin and a physical blowing agent through a die to obtain a polystyrene resin foam having a thickness of at least 10 mm and a transverse cross-sectional area of at least 50 cm2, wherein said extrusion is performed so that the ratio Mz/Mn of a Z average molecular weight Mz of the polystyrene resin foam to a number average molecular weight Mn of the polystyrene resin foam, each measured by gel permeation chromatography, is 8.0 or more.

Abstract: Description is made of an open cell polystyrene resin foam having a content of organic volatile matters of less than 100 ppm. The open cell foam is suitable as a core material for a sound insulating material or a vacuum heat insulating material. The open cell foam can be produced by melt-kneading a polystyrene resin having a content of organic volatile matters of 100 ppm or higher together with water in an extruder, sucking out the organic volatile matters as an azeotrope with water through a vent, injecting a blowing agent and kneading the injected mixture, and extruding the mixture into a lower pressure area to cause the resin to foam.

Abstract: A method for production of an extruded, polystyrene-based foam plate wherein a polystyrene-based resin is heated and kneaded together with a blowing agent, a flame retardant and a nucleating agent in an extruder to obtain a foamable molten composition, and the foamable molten composition is extruded through a die attached to an end of the extruder into a lower pressure zone. The blowing agent comprises not smaller than 25% by weight but not greater than 65% by weight, based on the total weight of the blowing agent, of an isobutane-containing saturated hydrocarbon; not smaller than 5% by weight but not greater than 70% by weight, based on the total weight of the blowing agent, of a dimethyl ether-containing ether; not smaller than 5% by weight but not greater than 55% by weight, based on the total weight of the blowing agent, of carbon dioxide; and 0–25% by weight, based on the total weight of the blowing agent, of other blowing agent components.

Abstract: A process for an extruded resin foam, comprising extruding a foamable composition comprising a melted polystyrene resin and a physical blowing agent through a die to obtain a polystyrene resin foam having a thickness of at least 10 mm and a transverse cross-sectional area of at least 50 cm2, wherein said extrusion is performed so that the ratio Mz/Mn of a Z average molecular weight Mz of the polystyrene resin foam to a number average molecular weight Mn of the polystyrene resin foam, each measured by gel permeation chromatography, is 8.0 or more.

Abstract: Description is made of an open cell polystyrene resin foam having a content of organic volatile matters of less than 100 ppm. The open cell foam is suitable as a core material for a sound insulating material or a vacuum heat insulating material.

Abstract: A method for production of an extruded, polystyrene-based foam plate wherein a polystyrene-based resin is heated and kneaded together with a blowing agent, a flame retardant and a nucleating agent in an extruder to obtain a foamable molten composition, and the foamable molten composition is extruded through a die attached to an end of the extruder into a lower pressure zone. The blowing agent comprises not smaller than 25% by weight but not greater than 65% by weight, based on the total weight of the blowing agent, of an isobutane-containing saturated hydrocarbon; not smaller than 5% by weight but not greater than 70% by weight, based on the total weight of the blowing agent, of a dimethyl ether-containing ether; not smaller than 5% by weight but not greater than 55% by weight, based on the total weight of the blowing agent, of carbon dioxide; and 0-25% by weight, based on the total weight of the blowing agent, of other blowing agent components.