The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2005
Filed:
May. 20, 2003
Takahiro Hayashi, Osaka, JP;
Kenkichi Tanaka, Ikeda, JP;
Hiroshi Kobayashi, Settsu, JP;
Jun Fukuzawa, Settsu, JP;
Syunji Kurihara, Settsu, JP;
Takahiro Hayashi, Osaka, JP;
Kenkichi Tanaka, Ikeda, JP;
Hiroshi Kobayashi, Settsu, JP;
Jun Fukuzawa, Settsu, JP;
Syunji Kurihara, Settsu, JP;
Kaneka Corporation, Osaka, JP;
Abstract
An extruded styrene resin foam which is produced by using a blowing agent imposing a reduced load on the environment and has outstandingly excellent thermal insulating property and flame retardant property adapted for construction use. The foam is obtained by extrusion-foaming of a styrene resin and characterized by containing at least, one or more of saturated hydrocarbons having 3 to 5 carbon atoms as a blowing agent, and containing (A) a halogenated flame retardant, and (B) at least one compound selected from the group consisting of phosphorus type flame retardants containing nitrogen atom in a molecule; tetrazole compounds; specific nitrogen-containing compounds; metal borates; boron oxides; phosphoric acid ester compounds, and having a cell structure constituting the foam wherein a cell anisotropic ratio k, which is defined by the formula: k=a/(a×b×c)wherein, in sections of the foam, a (mm) is an average cell size in the thickness direction, b (mm) is an average cell size in the transverse direction and c (mm) is an average cell size in the longitudinal direction, satisfies the relationship: k≦1.1, and a satisfies the relationship: 0.05≦a≦0.30, and the method for producing the same.