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1. 发明专利

JPH0638992A MATERIAL FOR TREATMENT OF PARADENTAL DISEASE 失效
公开(公告)号：JPH0638992A
公开(公告)日：1994-02-15
申请号：JP20714892
申请日：1992-07-10
申请人： TAKI CHEMICAL , YOKOTA MAKOTO
发明人： YOKOTA MAKOTO , KUBOTA KOZO , OKADA TAKAO , NAGAOKA YOICHI
IPC分类号： A61C19/06 , A61K6/00 , A61K31/765 , A61P1/02
摘要： PURPOSE:To obtain a material for treatment of paradental diseases useful for the regeneration of periodontal cells with excellence in softness, storage stability and adhesiveness. CONSTITUTION:A polymer of lactic acid or a copolymer of lactic acid and glycolic acid having a number average molecular weight range of 10,000-90,000 is mixed with triethyl citrate in a range if 10-40wt.% based on the polymer to obtain a periodental material. The material has softness, storage property and adhesiveness suitable for treatment of paradental diseases thereby enabling the regeneration of a periodontal tissue better.

2. 发明专利

JPH0940766A METHOD FOR REMOVING CATALYST FROM LACTIC ACID POLYMER 失效
公开(公告)号：JPH0940766A
公开(公告)日：1997-02-10
申请号：JP20997495
申请日：1995-07-25
申请人： TAKI CHEMICAL
发明人： NAGAOKA YOICHI , MIKI SHUICHI , OKADA TAKAO
IPC分类号： C08G63/08 , C08G63/90 , C08G63/91
摘要： PROBLEM TO BE SOLVED: To remove a catalyst from a high-molecular weight lactic acid polymer to thereby obtain a lactic acid polymer having high safety and scarcely undergoing thermal decomposition and thermal deterioration, by treating the polymer by immersing in a solution comprising a mixture of a specified organic solvent and an organic acid. SOLUTION: A lactic acid polymer having a viscosity-average molecular weight of at least 100,000 is treated by immersing in a solution comprising a mixture of an organic solvent and an organic acid. Satisfactory organic solvents used comprise those which are miscible with the acid and do not dissolve the polymer, and the examples thereof include esters such as methyl and ethyl acetates, ketones such as acetone and methyl ethyl ketone, and alcohols such as methanol and ethanol, among which ethyl acetate and actone are preferable in particular. Examples of the acid to be mixed with the organic solvent include monofunctional or polyfunctional organic acids, such as lactic, acetic and citric acids, among which lactic acid is preferable in particular. It is desirable that the weight ratio of the organic solvent to the organic acid in the mixture is (50 to 95):(50 to 5). The immersion time is about 5-24hr.

3. 发明专利

JP2001163691A COATED GRANULAR FERTILIZER AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001163691A
公开(公告)日：2001-06-19
申请号：JP35252999
申请日：1999-12-13
申请人： TAKI CHEMICAL
发明人： NAGAOKA YOICHI , OKADA TAKAO , MIKI SHUICHI
IPC分类号： C05G3/00 , C09D175/04
摘要： PROBLEM TO BE SOLVED: To obtain a coated fertilizer, elution of which is accurately regulated, and to obtain its manufacturing method. SOLUTION: Fertilizing effect adjusting type coated granular fertilizer, which is coated with a coating material consisting essentially of a carnauba wax and a polyurethane resin produced by a reaction of an oil modified alkyd resin and diphenylmethane diisocyanate and/or tolylenediisocyanate, is provided.

4. 发明专利

JPH0539347A BIODEGRADABLE POLYMER 失效
公开(公告)号：JPH0539347A
公开(公告)日：1993-02-19
申请号：JP22097091
申请日：1991-08-05
申请人： TAKI CHEMICAL
发明人： FUKUZAKI HIRONOBU , OKADA TAKAO , NAGAOKA YOICHI
IPC分类号： C08G63/06 , C08G63/78 , C08L101/16
摘要： PURPOSE:To produce a biodegradable polymer which gives preparations excellent in sustained release properties when combined, as a biodegradable base material, with various drugs. CONSTITUTION:The objective polymer having a number-average mol.wt. of 3,000 or lower is prepd. by the direct polycondensation of lactic acid and/or glycolic acid in the presence of a sugar alcohol in an amt. of 1-15wt.% based on the amt. of the lactic and/or glycolic acid.

5. 发明专利

JPH04249527A POLYMER 失效
公开(公告)号：JPH04249527A
公开(公告)日：1992-09-04
申请号：JP41641690
申请日：1990-12-28
申请人： TAKI CHEMICAL
发明人： OKADA TAKAO , NAGAOKA YOICHI
IPC分类号： A61L27/00 , C08G63/06
摘要： PURPOSE:To prevent the mol.wt. decrease on thermal melting of a polymer or copolymer of lactic acid and/or glycolic acid. CONSTITUTION:A polymer or copolymer having a mol.wt. of 10,000 or higher and prepd. from lactic acid and/or glycolic acid is reacted with a calcium salt of a higher fatty acid, etc., to give a calcium salt of the polymer or copolymer contg. calcium in an equivalent ratio to calcium contained in the polymer or copolymer before the reaction of 0.1-4.0. The prepd. polymer salt causes little decrease in mol.wt. on thermal melting during molding and is used as prosthetic material in organism, etc.

6. 发明专利

JPH11256016A RESIN COMPOSITION FOR FIXING LEAD 失效
公开(公告)号：JPH11256016A
公开(公告)日：1999-09-21
申请号：JP8031198
申请日：1998-03-11
申请人： TAKI CHEMICAL
发明人： NAGAOKA YOICHI , OKADA TAKAO , FUJIYAMA TAKASHI
IPC分类号： A61N1/05 , C08G63/06 , C08L67/04
摘要： PROBLEM TO BE SOLVED: To obtain a resin composition which is the most suitable for fixing intracorporeally embedded leads by using a lactic acid/ε-caprolactone copolymer having specified mechanical strengths and degradability attributable to its solubility in a phosphate-buffered physiological saline. SOLUTION: There is provided a resin composition comprising a copolymer comprising 60-90 mol.% lactic acid and 10-40 mol.% ε-caprolactone, having a tensile strength of 0.1-10kgf/m , satisfying the relationships: 100-43t+5.0 t [wherein R is the rate of change in a number-average molecular weight as measured in a phosphate-buffered physiological saline at 37 deg.C; t (week) is in the range: 3 [wherein t(week) is in the range: 4

7. 发明专利

JPH02232226A WATER-ABSORPTIVE RESIN 失效
公开(公告)号：JPH02232226A
公开(公告)日：1990-09-14
申请号：JP5468189
申请日：1989-03-06
申请人： TAKI CHEMICAL
发明人： NAGAOKA YOICHI , OKADA TAKAO
IPC分类号： C08G65/32
摘要： PURPOSE:To obtain the title resin having an excellent water-absorptivity and an excellent water retentivity for an aqueous liquid of a high salt concentration and being useful as a water-retentive agent for use in agriculture, horticulture and industry and an agent for improving the liquid absorptivity of a sanitary material by reacting polyethylene glycol with a specified carboxylic acid. CONSTITUTION:Polyethylene glycol desirably of an MW of 200-3000 is reacted with a carboxylic acid selected from among maleic acid, tartaric acid, citric acid, aconitic acid and trimellitic acid in a molar ratio of the former to the latter in a range of desirably 0.5-10.

8. 发明专利

JPH0632862A MICROBIALLY DEGRADABLE POLYURETHANE CUSHIONING MATERIAL 失效
公开(公告)号：JPH0632862A
公开(公告)日：1994-02-08
申请号：JP20861692
申请日：1992-07-14
申请人： NIPPON POLYURETHANE KOGYO KK , RENGO CO LTD , TAKI CHEMICAL
发明人： SAKOTA NAOICHI , KAWAMURA RYUSUKE , MASAOKA SATOSHI , OKADA TAKAO , NAGAOKA YOICHI , FUKUZAKI HIRONOBU , KUNISHIGE NOBORU , SUZUKI SEIKI , OBUCHI MASAO
IPC分类号： C08G18/42 , C08G18/48 , C08G18/76 , C08G101/00 , C08J9/02
摘要： PURPOSE:To obtain the subject cushioning material, excellent in cushioning and compression characteristics and useful as automotive seats, etc., without deteriorating the natural environment by reacting polymethylene polyphenylene polyisocyanate with a specific polyol and a foaming agent, etc. CONSTITUTION:The objective cushioning material is obtained by reacting (A) polymethylene polyphenylene polyisocyanate with (B) a polyol having COCH (CH3)-O group in the molecule such as polylactic acid polyol, (C) a foaming agent such as butane and, as necessary, (D) a catalyst and a foam stabilizer. Furthermore, the mixing molar ratio of the components (A) to (B) is preferably within the range of 0.7-1.2 and the foaming agent is used in an amount of preferably 0.1-20 pts.wt. based on 100 pts.wt. component (B).

9. 发明专利

JPH0549692A BLANK MATERIAL FOR TREATING PARADENTAL DISEASE 失效
公开(公告)号：JPH0549692A
公开(公告)日：1993-03-02
申请号：JP23746591
申请日：1991-08-23
申请人： TAKI CHEMICAL , YOKOTA MAKOTO
发明人： YOKOTA MAKOTO , KUBOTA KOZO , OKADA TAKAO , NAGAOKA YOICHI
IPC分类号： A61C19/06 , A61K9/70 , A61K47/34 , A61L27/00 , C08K5/05 , C08L67/00 , C08L67/04
摘要： PURPOSE:To obtain the blank material for treating paradental diseases useful for regeneration of the paradentium broken by the paradental diseases. CONSTITUTION:The blank material consisting of a component contg. alcohol in a (co)polymer of latic acid and/or glycolic acid is obtd. and this blank material is used by being packed into the endodecomposable membrane and teeth, by which the adhesion of the membrane is improved and, therefore, the paradentium is well regenerated.

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