Patents by Inventor Chihiro MAEDA
Chihiro MAEDA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10696843Abstract: Provided is a polyphenylene ether flame-retardant resin composition having excellent flame retardance and long-term flame retardance. The flame-retardant resin composition contains: (A) a resin including (A-1) a polyphenylene ether; and (B) a flame retardant. The (A-1) component has a content of 50 mass % or more when the flame-retardant resin composition minus ash content, corresponding to a residue obtained upon burning of the flame-retardant resin composition, is taken to be 100 mass %. A shaped article of 12.6 cm in length, 1.3 cm in width, and 1.6 mm in thickness formed from the flame-retardant resin composition exhibits a rate of change of chloroform-insoluble content of 15 mass % or less through aging in which the shaped article is left for 1,000 hours at 150° C. in an atmospheric air.Type: GrantFiled: October 3, 2016Date of Patent: June 30, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro Maeda, Mihoko Yamamoto, Akira Mitsui
-
Patent number: 10435508Abstract: Provided is a flame retardant resin composition excellent in flame retardance, and surface smoothness, appearance, flame retardance and electrical properties after a long-term thermal aging (e.g. 150° C., 500 hours) while maintaining mechanical and electrical properties. The disclosed flame retardant resin composition is a flame retardant resin composition containing a polyphenylene ether, in which, based on UL94 flammability test, an average burning time of a molded product having a length of 12.6 cm, a width of 1.3 cm and a thickness of 1.6 mm formed of the flame retardant resin composition before and after the aging processing in which the molded product is left to stand at 150° C. for 1000 hours under the atmospheric pressure is within 10 seconds, and a change rate of chloroform-insoluble component of the molded product before and after the aging processing is 15 mass % or less.Type: GrantFiled: October 3, 2017Date of Patent: October 8, 2019Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro Maeda, Mihoko Yamamoto, Akira Mitsui
-
Patent number: 10400103Abstract: The thermoplastic resin composition contains (A) a polyamide, (B) a polyphenylene ether, and (C) a compatibilizer. When the thermoplastic resin composition is molded into a specimen, a continuous phase containing the polyamide (A) and a dispersed phase containing the polyphenylene ether (B) are formed in the specimen, and E-20 represents a mean ellipticity of the dispersed phase in region I extending from a surface of the hinge portion to a depth of 20 ?m in the thickness direction, and E-mid represents a mean ellipticity of the dispersed phase in region II extending from a distance, measured along the thickness direction from the surface, equal to 48% of the thickness to a distance, measured along the thickness direction from the surface, equal to 52% of the thickness, the following formula (1) is satisfied: 4.0?(E-20)/(E-mid)??(1).Type: GrantFiled: December 5, 2016Date of Patent: September 3, 2019Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro Maeda, Yuo Umei, Mihoko Yamamoto
-
Publication number: 20190119492Abstract: Provided is a polyphenylene ether flame-retardant resin composition having excellent flame retardance and long-term flame retardance. The flame-retardant resin composition contains: (A) a resin including (A-1) a polyphenylene ether; and (B) a flame retardant. The (A-1) component has a content of 50 mass % or more when the flame-retardant resin composition minus ash content, corresponding to a residue obtained upon burning of the flame-retardant resin composition, is taken to be 100 mass %. A shaped article of 12.6 cm in length, 1.3 cm in width, and 1.6 mm in thickness formed from the flame-retardant resin composition exhibits a rate of change of chloroform-insoluble content of 15 mass % or less through aging in which the shaped article is left for 1,000 hours at 150° C. in an atmospheric air.Type: ApplicationFiled: October 3, 2016Publication date: April 25, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro MAEDA, Mihoko YAMAMOTO, Akira MITSUI
-
Publication number: 20180094102Abstract: Provided is a flame retardant resin composition excellent in flame retardance, and surface smoothness, appearance, flame retardance and electrical properties after a long-term thermal aging (e.g. 150° C., 500 hours) while maintaining mechanical and electrical properties. The disclosed flame retardant resin composition is a flame retardant resin composition containing a polyphenylene ether, in which, based on UL94 flammability test, an average burning time of a molded product having a length of 12.6 cm, a width of 1.3 cm and a thickness of 1.6 mm formed of the flame retardant resin composition before and after the aging processing in which the molded product is left to stand at 150° C. for 1000 hours under the atmospheric pressure is within 10 seconds, and a change rate of chloroform-insoluble component of the molded product before and after the aging processing is 15 mass % or less.Type: ApplicationFiled: October 3, 2017Publication date: April 5, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro MAEDA, Mihoko YAMAMOTO, Akira MITSUI
-
Publication number: 20180057685Abstract: Provided is a resin composition having excellent flame retardance, molding processability, and post-heat aging flame retardance. A flame-retardant resin composition contains: (A) a polyphenylene ether; (B) at least one thermoplastic resin selected from the group consisting of (B-1) a polystyrene resin, (B-2) a polyamide resin, (B-3) a polypropylene resin, and (B-4) a polyphenylene sulfide resin; and (C) a flame retardant. The (A) component has a content of less than 50 mass % when the flame-retardant resin composition minus ash content is taken to be 100 mass %. The flame-retardant resin composition has a flame retardance level of V-0 as measured by a UL 94 vertical burning test. A molded article formed from the flame-retardant resin composition exhibits a rate of change of chloroform-insoluble content of no greater than 15 mass % before and after being subjected to aging in which the molded article is left for 1,000 hours at 150° C. in an atmospheric environment.Type: ApplicationFiled: June 20, 2017Publication date: March 1, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro MAEDA, Mihoko YAMAMOTO, Akira MITSUI
-
Publication number: 20170166746Abstract: The thermoplastic resin composition contains (A) a polyamide, (B) a polyphenylene ether, and (C) a compatibilizer. When the thermoplastic resin composition is molded into a specimen, a continuous phase containing the polyamide (A) and a dispersed phase containing the polyphenylene ether (B) are formed in the specimen, and E-20 represents a mean ellipticity of the dispersed phase in region I extending from a surface of the hinge portion to a depth of 20 ?m in the thickness direction, and E-mid represents a mean ellipticity of the dispersed phase in region II extending from a distance, measured along the thickness direction from the surface, equal to 48% of the thickness to a distance, measured along the thickness direction from the surface, equal to 52% of the thickness, the following formula (1) is satisfied: 4.Type: ApplicationFiled: December 5, 2016Publication date: June 15, 2017Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro MAEDA, Yuo UMEI, Mihoko YAMAMOTO
-
Publication number: 20150183991Abstract: Provided is a flame-retardant thermoplastic resin composition including (A) a thermoplastic resin other than a polyphenylene ether, (B) polyphenylene ether, (C) at least one phosphinate selected from the group consisting of a phosphinate having a particular structure, a diphosphinate having a particular structure and a condensate thereof, and (D) at least one colorant selected from the group consisting of an organic pigment, an inorganic pigment and an organic dye, wherein a content of an iron element is less than 50 ppm on a mass basis.Type: ApplicationFiled: November 18, 2014Publication date: July 2, 2015Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Mihoko YAMAMOTO, Koichiro YOSHIDA, Shunichiro I, Chihiro MAEDA