Patents by Inventor Shin To
Shin To 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).
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Patent number: 8575302Abstract: A composition which comprises polylactide and has excellent heat stability, color and hydrolytic resistance. The composition comprises (i) polylactide, (ii) a metal catalyst and (iii) a hypophosphorous acid-based deactivator or a metaphosphoric acid-based deactivator.Type: GrantFiled: October 4, 2006Date of Patent: November 5, 2013Assignees: Teijin Limited, Musashino Chemical Laboratory, Ltd.Inventors: Hirotaka Suzuki, Kiyotsuna Toyohara, Shin To
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Patent number: 8299148Abstract: An object of the present invention is to provide a fiber made of polylactic acid and having excellent strength, heat resistance and heat shrinkage resistance and a manufacturing method thereof. The present invention relates to the fiber is made of a composition which includes (i) poly(L-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component A), (ii) poly(D-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component B) and (iii) 0.01 to 5 parts by weight of a phosphate metal salt (component C) based on 100 parts by weight of the total of the components A and B and has a strength of 2.5 to 10 cN/dTex and a manufacturing method thereof.Type: GrantFiled: September 3, 2007Date of Patent: October 30, 2012Assignees: Teijin Limited, Musashino Chemical Laboratory, Ltd.Inventors: Midori Ikegame, Takaaki Matsuda, Shin To
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Patent number: 8163849Abstract: It is an object of the present invention to produce a polylactic acid having a high molecular weight such as a weight average molecular weight (Mw) of more than 100,000 from which only a stereocomplex crystal is grown even by repeating melting and crystallization. The present invention is a process of producing a polylactic acid, including the steps of: (i) obtaining a solid by kneading together poly(L-lactic acid) and poly(D-lactic acid) at a temperature of 160 to 225° C. and crystallizing the kneaded product; and (ii) melt kneading the obtained solid.Type: GrantFiled: February 6, 2008Date of Patent: April 24, 2012Assignee: Teijin LimitedInventors: Kiyotsuna Toyohara, Midori Ikegame, Hideki Yamane, Yoshiharu Kimura, Daisuke Masaki, Shin To
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Patent number: 8030382Abstract: It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).Type: GrantFiled: February 21, 2008Date of Patent: October 4, 2011Assignees: Teijin Limited, Musashino Chemical Laboratory, Ltd.Inventors: Kohei Endo, Hirotaka Suzuki, Takaaki Matsuda, Shin To
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Publication number: 20100120991Abstract: It is an object of the present invention to provide a composition comprising polylactic acid and having improved injection moldability and an injection molded product thereof. The object of the present invention is attained by a specific polylactic acid composition which meets the following requirements (a) to (g) at the same time: (a) it must have a weight average molecular weight of 70,000 to 700,000; (b) the total content of Sn atom, Ti atom, Al atom and Ca atom must be 3 to 20 ppm; (c) it must contain a P atom in an amount of 3 to 3,000 ppm; (d) the (total number of gram-atoms of Sn, Ti, Al and Ca)/(number of gram-atoms of P) value must be 0.01 to 5; (e) the content of a compound having a molecular weight of 150 or less must be not more than 0.2 wt %; (f) the COOH terminal group concentration must be not more than 30 equivalents/ton; and (g) the melt viscosity (P) at a melting temperature of 230° C. must satisfy the following expression (1): 10 Pa·s<P<100 Pa·s??(1).Type: ApplicationFiled: March 31, 2008Publication date: May 13, 2010Applicants: TEIJIN LIMITED, MUSASHINO CHEMICAL LABORATORY ,Inventors: Kiyotsuna Toyohara, Ryuji Nonokawa, Kohei Endo, Shin To
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Publication number: 20100093888Abstract: It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).Type: ApplicationFiled: February 21, 2008Publication date: April 15, 2010Applicants: TEIJIN LIMITED, MUSASHINO CHEMICAL LABORATORY, LTD.Inventors: Kohei Endo, Hirotaka Suzuki, Takaaki Matsuda, Shin To
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Publication number: 20100093889Abstract: An object of the present invention is to provide a composition containing polylactic acid and having improved blow moldability and a blow molded product thereof. The polylactic acid composition meets the following requirements (a) to (g) at the same time: (a) the weight average molecular weight must be 70,000 to 700,000; (b) the total content (metal content) of Sn atom, Ti atom, Al atom and Ca atom must be 3 to 20 ppm; (c) the content of P atom must be 3 to 3,000 ppm; (d) the (total number of gram-atoms of Sn, Ti, Al and Ca)/(number of gram-atoms of P) value must be 0.01 to 5; (e) the content of a compound having a molecular weight of 150 or less must be not more than 0.2 wt %; (f) the COOH terminal group concentration must be not more than 30 equivalents/ton; and (g) the following expressions (1) and (2) must be satisfied: 10 Pa·s<P<100 Pa·s??(1) 10 MPa<S??(2) (P is a melt viscosity at 230° C. and S is a stress at 150° C.).Type: ApplicationFiled: March 31, 2008Publication date: April 15, 2010Applicants: Teijin Limited, Musashino Chemical Laboratory, Ltd.Inventors: Kiyotsuna Toyohara, Ryuji Nonokawa, Kohei Endo, Midori Ikegame, Shin To
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Publication number: 20100056751Abstract: It is an object of the present invention to produce a polylactic acid having a high molecular weight such as a weight average molecular weight (Mw) of more than 100,000 from which only a stereocomplex crystal is grown even by repeating melting and crystallization. The present invention is a process of producing a polylactic acid, including the steps of: (i) obtaining a solid by kneading together poly(L-lactic acid) and poly(D-lactic acid) at a temperature of 160 to 225° C. and crystallizing the kneaded product; and (ii) melt kneading the obtained solid.Type: ApplicationFiled: February 6, 2008Publication date: March 4, 2010Inventors: Kiyotsuna Toyohara, Midori Ikegame, Hideki Yamane, Yoshiharu Kimura, Daisuke Masaki, Shin To
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Publication number: 20100004362Abstract: An object of the present invention is to provide a fiber made of polylactic acid and having excellent strength, heat resistance and heat shrinkage resistance and a manufacturing method thereof. The present invention relates to the fiber is made of a composition which comprises (i) poly(L-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component A), (ii) poly(D-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component B) and (iii) 0.01 to 5 parts by weight of a phosphate metal salt (component C) based on 100 parts by weight of the total of the components A and B and has a strength of 2.5 to 10 cN/dTex and a manufacturing method thereof.Type: ApplicationFiled: September 3, 2007Publication date: January 7, 2010Applicants: TEIJIN LIMITED, MUSASHINO CHEMICAL LABORATORY , LTD.Inventors: Midori Ikegame, Takaaki Matsuda, Shin To
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Publication number: 20090234094Abstract: A composition which comprises polylactide and has excellent heat stability, color and hydrolytic resistance. The composition comprises (i) polylactide, (ii) a metal catalyst and (iii) a hypophosphorous acid-based deactivator or a metaphosphoric acid-based deactivator.Type: ApplicationFiled: October 4, 2006Publication date: September 17, 2009Inventors: Hirotaka Suzuki, Kiyotsuna Toyohara, Shin To