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    PREPARATION OF MODIFIED WOOD
    92.
    发明专利
    PREPARATION OF MODIFIED WOOD 失效

    公开(公告)号：JPH01306202A

    公开(公告)日：1989-12-11

    申请号：JP13665988

    申请日：1988-06-04

    Applicant: OKURA INDUSTRIAL CO LTD

    Inventor： MATSUDA HIDEAKI ,  MURAKAMI KOICHI ,  UEDA MINORU

    IPC: B27K3/15 ,  B27K5/00

    Abstract: PURPOSE:To improve dimensional stability and resistance to climate, by impregnating a wood with a reactive solution consisting of polybasic acid anhydride and epoxy compound, then separating excess reactive solution, and thereafter heating the wood at a specified temperature by means of high frequency to add alternately the polybasic acid anhydride and the epoxy compound to the hydroxyl group of the wood. CONSTITUTION:A wood is impregnated with a reactive solution consisting of polybasic acid anhydride and epoxy compound, then excess reactive solution is separated from the wood impregnated with a reactive solution, the excess reactive solution as not used to impregnate the wood during the impregnation step, and thereafter the wood is heated at 40-160 deg.C by means of high frequency to add alternately the polybasic acid anhydride and the epoxy compound to the hydroxyl group which is a component existing in the wood. In such a way a chemical decoration is successfully performed from the inside of the wood. In such manner, as the reactive solution itself, which is used to impregnate the wood, generates heat, the wood is heated from its inside,it can be uniformly modified and the reaction time can be shortened due to a very high thermal efficiency.

    PRODUCTION OF MOLDED CELLULOSIC MATERIAL
    97.
    发明专利
    PRODUCTION OF MOLDED CELLULOSIC MATERIAL 失效

    公开(公告)号：JPS60141759A

    公开(公告)日：1985-07-26

    申请号：JP24897683

    申请日：1983-12-29

    Applicant: OKURA INDUSTRIAL CO LTD

    Inventor： MIYOSHI NORIYUKI ,  MATSUDA HIDEAKI ,  UEDA MINORU

    IPC: B32B15/08 ,  C08B13/00 ,  C08G59/00 ,  C08G59/42 ,  C08J5/00 ,  C08K5/09 ,  C08L63/00 ,  C08L97/00

    Abstract: PURPOSE:To manufacture a beautiful molded article having the appearance of plastic article, economically from waste materials such as rice straw, bagasse, etc. without leaving the shape of the raw materials, by adding a polybasic acid anhydride and an epoxy-containing compound to dried cellulosic material, and hot-pressing the mixture. CONSTITUTION:Dried cellulosic material is mixed with a polybasic acid anhydride and a compound containing two or more epoxy groups in the molecule, stirred thoroughly, and hot-pressed to obtain the objective article. The cellulosic material is prepared by crushing waste paper, rice straw, chaff, etc. to small pieces, and drying to a water-content of

    PRODUCTION OF CELLULOSIC MATERIAL CONTAINING CARBOXYL GROUP
    98.
    发明专利
    PRODUCTION OF CELLULOSIC MATERIAL CONTAINING CARBOXYL GROUP 失效

    公开(公告)号：JPS60137901A

    公开(公告)日：1985-07-22

    申请号：JP24469483

    申请日：1983-12-27

    Applicant: OKURA INDUSTRIAL CO LTD

    Inventor： UEDA MINORU ,  MATSUDA HIDEAKI ,  MIYOSHI NORIYUKI

    IPC: C08B3/12

    Abstract: PURPOSE:To dried cellulosic material is esterified by effecting its reaction with a polybasic acid anhydride at a specific temperature in the absence of any solvent to achieve low-cost production of the titled material which is suitably used as a construction material or parts for industrial purposes through simplified process. CONSTITUTION:A dried cellulosic material such as rice plant straw, wheat straw or used paper is combined with a polybasic acid anhydride such as maleic anhydride, preferably in a desired amount, when needed, in the presence of a catalyst such as sodium carbonate to effect the reaction over 60 deg.C, preferably below 200 deg.C under stirring and the objective esterified material is obtained.

    MANUFACTURE OF ESTERIFIED WOOD
    99.
    发明专利
    MANUFACTURE OF ESTERIFIED WOOD 失效

    公开(公告)号：JPS58148747A

    公开(公告)日：1983-09-03

    申请号：JP3171782

    申请日：1982-03-02

    Applicant: OKURA INDUSTRIAL CO LTD

    Inventor： UEDA MINORU ,  MATSUDA TERUAKI ,  HARA MASANORI ,  MURAKAMI KOUICHI

    IPC: B27K5/00 ,  B27N1/00 ,  C08H8/00

    Abstract: PURPOSE:To promote smooth esterifying reaction and to introduce carboxyl groups by a method wherein polybasic anhydride is reacted on a small wooden piece in aprotic polarsolvent in the presence of basic catalyst to esterify hydroxyl groups in wood. CONSTITUTION:Small wooden pieces such as wooden fibers, wooden chips, fined wood, etc. are dried. Polybasic anhydride such as maleic anhydride, succinic anhydride, etc. is dissolved in aprotic polar solvent such as dimethylamide, dimethylsulfoxide, etc. to prepare polybasic anhydride density solution of 40% or more. After basic catalyst such as dimethyl benzilic amine, pyridine etc. is dissolved in the above solution, this solution is added to the above-mentioned small pieces of wood so that the pieces are dipped and reacted. The reaction is performed at room temperature -200 deg.C. As the reaction goes on, the anhydroxy group in the wood causes esterifying reaction with polybasic anhydride to introduce carboxyl group in wooden fibers.

    FIREERESISTING DECORATIVE SHEET OF WOOD
    100.
    发明专利
    FIREERESISTING DECORATIVE SHEET OF WOOD 失效

    公开(公告)号：JPS54153887A

    公开(公告)日：1979-12-04

    申请号：JP6316378

    申请日：1978-05-25

    Applicant: OKURA INDUSTRIAL CO LTD

    Inventor： UEDA MINORU ,  HARA MASANORI

    IPC: B32B19/00 ,  B32B21/04

    Abstract: PURPOSE:A decorative sheet of wood that is prepared by providing a fire-resisting layer containing a foaming fire-resisting coating and an inorganic powder on a base sheet of wood and applying a facing material thereon, thus giving fire-resisting properties even to the final articles including the same. CONSTITUTION:On the surface of base plate of wood 1, is coated a foaming fireresisting coating composition containing a flame retarder, a foaming agent, a carbonization agent, a binder, a curing agent, etc., in an amount of 500-1500 g/m to form the foaming fire-resisting coating layer 2. Fire-resisting coating layer 3 is formed by coating a fire-resisting coating containing an inorganic powder as that of calcium hydroxide or aluminum hydroxide and a thermosetting and/or thermoplastic resin as vehicle in an amount of over 80 g/m . Finally, after the fire-resisting layer is smoothened, facing material 5 is applied thereupon using an adhesive 4.

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