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    POLYMETALLOCARBOSILANE, AND PROCESS FOR ITS PRODUCTION
    2.
    发明专利
    POLYMETALLOCARBOSILANE, AND PROCESS FOR ITS PRODUCTION 未知

    公开(公告)号：CA1154032A

    公开(公告)日：1983-09-20

    申请号：CA365146

    申请日：1980-11-20

    Applicant: UBE INDUSTRIES

    Inventor： YAJIMA SEISHI ,  OKAMURA KIYOHITO ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

    IPC: C01B31/30 ,  C04B35/571 ,  C08G77/58 ,  C08G77/60

    Abstract: A polymetallocarbosilane having a number average molecular weight of 700 to 100,000 derived from a polycarbosilane having a number average molecular weight of 200 to 10,000 and containing a main-chain skeleton represented mainly by the general formula wherein R represents a hydrogen atom, a lower alkyl group or a phenyl group, andan organometallic compound represented by the general formula MX4 wherein M represents Ti or Zr, and X represents an alkoxy group having 1 to 20 carbon atoms, a phenoxy group or an acetylacetoxy group, at least one of the silicon atoms of the polymetallocarbosilane being bonded to the metal atom (M) through an oxygen atom, the ratio of the total number of the structural units ?Si-CH2? to the total nunnber of the structural units ?M-O? in the polymetallocarbosilane being in the range of from 2:1 to 200:1; and a process for production thereof. Molded articles obtained by firing the polymetallocarbosilane exhibit excellent mechanical properties and oxidation resistance at high temper-atures.

    INORGANIC FIBER-REINFORCED CERAMIC COMPOSITE MATERIAL
    3.
    发明专利
    INORGANIC FIBER-REINFORCED CERAMIC COMPOSITE MATERIAL 未知

    公开(公告)号：CA1225667A

    公开(公告)日：1987-08-18

    申请号：CA479773

    申请日：1985-04-23

    Applicant: UBE INDUSTRIES

    Inventor： YAMAMURA TAKEMI ,  TOKUSE MASAHIRO ,  WAKU YOSHIHARU

    IPC: C03C14/00 ,  C04B35/80

    Abstract: of the Invention: An inorganic fiber-reinforced ceramic composite material comprising a matrix of a ceramic and inorganic fibers as a reinforcing material, characterized in that (a) the inorganic fibers are specified inorgnic fibers containing silicon, either titanium or zirconium, carbon and oxygen, (b) the ceramic is at least one material selected from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite and specified inorganic materials containing silicon, either titanium or zirconium, carbon and oxygen, (c) the inorganic fibers have an initial reaction degradation speed of not more than 0.35 kg/mm2.sec-1 and a tenacity reduction ratio of not more than 40 % during the production of the composite material, (d) the composite material has a critical stress intensity factor about 2 to 7 times as high as that of said matrix alone, and (e) the composite material has a bending strength reduction ratio, measured by a thermal shock fracture resistance measuring method, of not more than about 10 % after it is heat-treated in air at 800 to 1300 .degree.C, immediately then dipped in water at room temperature, and then dried.

    SINTERED CERAMIC BODY AND PROCESS FOR PRODUCTION THEREOF
    4.
    发明专利
    SINTERED CERAMIC BODY AND PROCESS FOR PRODUCTION THEREOF 未知

    公开(公告)号：DE3164100D1

    公开(公告)日：1984-07-19

    申请号：DE3164100

    申请日：1981-03-25

    Applicant: UBE INDUSTRIES

    Inventor： YAJIMA SEISHI TOHOKU DAIGAKU S ,  OKAMURA KIYOHITO TOHOKU DAIGAK ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

    IPC: C04B35/571 ,  C04B35/63 ,  C08G77/398 ,  C04B35/56 ,  C01B31/30 ,  C08G81/00

    Abstract: A process for producing a sintered ceramic body, which comprises heating a semi-inorganic block copolymer at a temperature of from 500 DEG to 2300 DEG C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases, said copolymer comprising polycarbosilane blocks having a main-chain skeleton composed mainly of carbosilane units of the formula (Si-CH2) and zirconoxane units of the formula (Zr-O); and shaping the heated product, and simultaneously with, or after, the shaping of the heated product, sintering the shaped product at a temperature of from 800 DEG C. to 2300 DEG C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases; and a sintered ceramic body consisting substantially of Si, Zr and C and optionally of O, said sintered body being composed substantially of (1) an amorphous material consisting substantially of Si, Zr and C and optionally of O, or (2) an aggregate consisting subtantially of ultrafine crystalline particles of beta -SiC, ZrC, a solid solution of beta -SiC and ZrC and ZrC1-x wherein O

    ORGANOMETALLIC SILOXANE BLOCK COPOLYMERS AND PREPARATION THEREOF
    10.
    发明专利
    ORGANOMETALLIC SILOXANE BLOCK COPOLYMERS AND PREPARATION THEREOF 未知

    公开(公告)号：CA1151792A

    公开(公告)日：1983-08-09

    申请号：CA355008

    申请日：1980-06-27

    Applicant: UBE INDUSTRIES

    Inventor： YAJIMA SEISHI ,  OKAMURA KIYOHITO ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

    IPC: C01B31/30 ,  C04B35/571 ,  C08G77/42 ,  C08G77/58 ,  C08L83/10

    Abstract: A process for producing an organometallic copolymer composed of a polycarbosilane portion and a polymetallosiloxane portion crosslinked with each other, which comprises reacting (1) a polycarbosilane having a main chain skeleton composed mainly of carbosilane units of the formula ?Si-CH2?, with (2) a polymetallosiloxan having a main chain skeleton composed of metalloxane units of the formula ?M-O? wherein M represents Ti or Zr and siloxane units of the formula ?Si-O?, in an organic solvent in an inert atmosphere thereby to bond at least some of the silicon atoms of said polycarbosilane to at least some of the metal atoms M and/or silicon atoms of said polymetallosiloxane through an oxygen atom; and the organometallic copolymer obtained by the aforesaid process.

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