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    MOLDED ITEM OF THERMOPLASTIC RESIN CAPABLE OF BREAKING MICROORGANISM AND MANUFACTURE THEREOF
    5.
    发明专利
    MOLDED ITEM OF THERMOPLASTIC RESIN CAPABLE OF BREAKING MICROORGANISM AND MANUFACTURE THEREOF 失效

    公开(公告)号：JPH04182112A

    公开(公告)日：1992-06-29

    申请号：JP28131790

    申请日：1990-10-19

    Applicant: AGENCY IND SCIENCE TECHN ,  JSP CORP

    Inventor： TOKIWA YUTAKA ,  IWAMOTO AKIRA ,  TAKEDA KIYOSHI

    IPC: C08J5/00 ,  B29C47/00 ,  B29K67/00 ,  C08L67/00 ,  C08L67/04 ,  C08L101/00 ,  C08L101/16

    Abstract: PURPOSE:To obtain a molded item of resin capable of breaking microorganism and also having excellent mechanical property and secondary workability by using aliphatic polyester resin as matrix resin and mixing and dispersing thermoplastic resin in said matrix at a predetermined ratio. CONSTITUTION:Aliphatic polyester resins are polycondensation product of polyhydric carboxylic acid and polyhydric alcohol, polycondensation product of hydroxy acid and ring-opening polymerization product of lactone, which are hydrolyzed by the action of lipase. Thermoplastic resins are those of olefin, styrene, vinyl, acryl, amide, etc. A mixture of 25-60wt.% of said aliphatic polyester and 75-40wt.% of thermoplastic resins is extruded under conditions satisfying the formulas I, II. Extrusion is difficult to perform where etaA =10 and molded items wherein polyester resin is used as matrix cannot be obtained where etaB/etaA

    MICROORGANISM-DECOMPOSABLE PLASTIC MOLDING AND PREPARATION THEREOF
    6.
    发明专利
    MICROORGANISM-DECOMPOSABLE PLASTIC MOLDING AND PREPARATION THEREOF 失效

    公开(公告)号：JPH03157450A

    公开(公告)日：1991-07-05

    申请号：JP29576589

    申请日：1989-11-14

    Applicant: AGENCY IND SCIENCE TECHN ,  JSP CORP

    Inventor： TOKIWA YUTAKA ,  IWAMOTO AKIRA ,  TAKEDA KIYOSHI

    IPC: B29C47/00 ,  B29K67/00 ,  C08G63/08 ,  C08G63/78 ,  C08J5/00 ,  C08L67/00 ,  C08L67/04 ,  C08L101/16

    Abstract: PURPOSE:To prepare a plastic molding capable of being perfectly decomposed with microorganism by molding a kneaded product prepared by thermally melting and mixing polycaprolactone with poly beta-hydroxybutyric acid in the presence of a catalyst into a desired shape. CONSTITUTION:A kneaded product prepared by thermally melting and mixing (A) 90-20wt.%, preferably 80-30wt.%, of polycaprolactone having a number- average mol.wt. of 1000-120000, preferably 10000-100000, with (B) 10-80wt.%, preferably 20-70wt.%, of poly beta-hydroxybutyric acid having a number-average mol.wt. of 10000-1000000, preferably 20000-200000, in the presence of (C) a catalyst (e.g. anhydrous zinc acetate) capable of copolymerizing the having A and B in an amount of 0.05-5wt.%, preferably 0.1-1wt.%, based on the total amount of the components A and B and containing the copolymer of caprolactone and beta-hydroxybutyric acid as a compatibilizing agent is molded into a desired shape to provide a microorganism-decomposable plastic molding.

    SEMI-CONTINUOUS DECOMPOSITION OF RUBBER WITH MICROORGANISM
    7.
    发明专利
    SEMI-CONTINUOUS DECOMPOSITION OF RUBBER WITH MICROORGANISM 失效

    公开(公告)号：JPH0276575A

    公开(公告)日：1990-03-15

    申请号：JP22884488

    申请日：1988-09-14

    Applicant: AGENCY IND SCIENCE TECHN ,  FUJI LATEX CO

    Inventor： DOI AKIO ,  TAKEDA KIYOSHI ,  SUZUKI TOMOO ,  KAJIKAWA SHINICHI

    IPC: C12N1/20 ,  B09B3/00 ,  C08J11/10 ,  C08L7/00 ,  C12R1/01 ,  C12R1/365

    Abstract: PURPOSE:To enable the highly efficient and massive treatment of an isoprenic rubber by semi-continuously decomposing the isoprenic rubber with rubber- decomposing microorganisms belonging to the genus Nocardia or Rhodococcus under a non-sterilizing condition. CONSTITUTION:A reaction vessel provided with a ventilating equipment and/or a stirrer and with equipments for controlling the temperature and pH thereof, such as a jar fomenter for culturing microorganisms is charged with a nitrogen source, a phosphorus source, etc., as additive sources except the rubber according to an ordinary culturing method of aerobic microorganisms and subsequently maintained at a temperature of approximately 30 deg.C and at a pH of approximately 7. The wastes of an isoprenic rubber such as natural rubber are semi- continuously added in a load amount of 0.17-0.7g/l.day under a non-sterilizing condition and decomposed while culturing rubber-decomposing microorganisms belonging to the genus Nocardia or Rhodococcus. Since the rubber-decomposing ability of the microorganisms can be maintained even after operated for a long period, the method can be expected to be widely utilized as a readily controllable, biologically decomposing treatment method.

    PRODUCTION ENHANCEMENT OF MICROBIAL FLOCCULANT
    8.
    发明专利
    PRODUCTION ENHANCEMENT OF MICROBIAL FLOCCULANT 失效

    公开(公告)号：JPS62195289A

    公开(公告)日：1987-08-28

    申请号：JP3602386

    申请日：1986-02-20

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： KURANE RYUICHIRO ,  TAKEDA KIYOSHI ,  SUZUKI TOMOO

    IPC: C02F11/14 ,  B01D21/01 ,  C12P1/06 ,  C12R1/365

    Abstract: PURPOSE:To produce a flocculant excellent in both environmental protection and safety with a high efficiency, by selecting a specific cultivation pH and air flow rate and cultivating a microorganism of the grenus Nocardia and having flocculating ability. CONSTITUTION:A microorganism of the genus Nocardia having the ability to produce a flocculant represented by Nocardia restrictus KR-I-3 (FERM-P No.4169) is cultivated. In the process, an organic nitrogen source containing at least one selected from yeat extract, casamino acid and peptone is added to a culture medium and the initial pH is adjusted to a neutral - alkaline region. The air flow ratio to the culture fluid is limited to

    METHOD FOR DECOMPOSING HARD RUBBER PRODUCT
    9.
    发明专利
    METHOD FOR DECOMPOSING HARD RUBBER PRODUCT 失效

    公开(公告)号：JPH09194624A

    公开(公告)日：1997-07-29

    申请号：JP880796

    申请日：1996-01-23

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： DOI AKIO ,  TAKEDA KIYOSHI ,  TOKIWA YUTAKA

    IPC: C12N1/20 ,  C08J11/06 ,  C08J11/18 ,  C12P1/04 ,  C12R1/365 ,  C12S99/00

    Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently decomposing a hard rubber product, particularly a tire having a high natural rubber content by conducting treatment with a microorganism belonging to a particular genus in the presence of a soft rubber product. SOLUTION: A hard rubber product is treated with a microorganism belonging to the genus Nocardia in the presence of a soft rubber. Microorganisms belonging to the genus Nocardia include Nocardia NR-35A (stipulation number FERM P-7266 with National Institute of Bioscience and Human-Technology, Agency of Industrial Science &Technology). Soft rubber products as a substrate for growing of rubber degrading bacteria include natural and synthetic isoprene rubber products. Hard rubber products include tires. Regarding degradative reaction conditions, e.g. culture media usable herein include one containing a rubber as the substrate for the microorganism and, in addition, inorg. salts, containing such as nitrogen and phosphorus. The reaction may be conducted under the conditions of a temp. of 20 to 37 deg.C and a pH value of 6.0 to 8.0.

    DECOMPOSITION OF ISOPRENE RUBBER BY MICROORGANISM
    10.
    发明专利
    DECOMPOSITION OF ISOPRENE RUBBER BY MICROORGANISM 失效

    公开(公告)号：JPH0196230A

    公开(公告)日：1989-04-14

    申请号：JP25505687

    申请日：1987-10-09

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： DOI AKIO ,  TAKEDA KIYOSHI ,  SUZUKI TOMOO

    IPC: C12N1/20 ,  C08J11/04 ,  C12R1/64

    Abstract: PURPOSE:To easily recover decomposed liquid of an isoprene rubber without causing side reactions, using an agent exhibiting strong rubber-decomposition activity, by contacting an isoprene rubber with cultured cell of a specific microorganism belonging to genus Xanthomonas or filtrate of cultured product, etc. CONSTITUTION:An isoprene rubber is decomposed by culturing a microbial strain belonging to genus Xanthomonas and capable of decomposing isoprene rubber and contacting an isoprene rubber with the cultured cell, filtrate of cultured product or their treated product. The microbial strain is preferably Xanthomonas NR-35Y (FERM 9640).

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