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    PRODUCTION OF CYCLIC POLYSILOXANE
    31.
    发明专利
    PRODUCTION OF CYCLIC POLYSILOXANE 失效

    公开(公告)号：JPH07316166A

    公开(公告)日：1995-12-05

    申请号：JP13494494

    申请日：1994-05-25

    Applicant: TORAY INDUSTRIES ,  DOW CORNING TORAY SILICONE

    Inventor： AIZAWA HIDEYUKI ,  WATANABE TETSUYA ,  NAGAI YOSHIYUKI

    IPC: B01J27/13 ,  C07B61/00 ,  C07F7/21

    Abstract: PURPOSE:To efficiently and stably obtain a cyclic polysiloxane on an industrial scale in a high yield by keeping the amount of low-boiling point impurities in a Sin-containing cyclic polysiloxane as a raw material below a specified value in the case of hydrosilyl reaction with a platinum catalyst. CONSTITUTION:Firstly, the content of the low-boiling point impurities in a SiH-containing polysiloxane of the formula [R is a univalent hydrocarbon free from an aliphatic multiple bond; (m) is a positive integer; (n) is 0 or a positive integer; (m)+(n)=4-8], (e.g. heptamethylcyclotetrasiloxane) as a raw material is reduced to

    PRODUCTION OF FINE SPHERICAL SILICONE PARTICLES
    32.
    发明专利
    PRODUCTION OF FINE SPHERICAL SILICONE PARTICLES 失效

    公开(公告)号：JPH06279589A

    公开(公告)日：1994-10-04

    申请号：JP6820293

    申请日：1993-03-26

    Applicant: TORAY INDUSTRIES

    Inventor： AIZAWA HIDEYUKI ,  WATANABE TETSUYA

    IPC: C08G77/32 ,  C08J3/14

    Abstract: PURPOSE:To produce fine spherical silicone particles having a narrow particle size distribution by using a hydrocarbon-substd. organopolysiloxane which is an inexpensive starting material. CONSTITUTION:An organopolysiloxane comprising constituent units of [R SiO3/2] or constituent units of [R SiO3/2] and [R 2SiO] and/or [SiO2], and represented by the average compositional formula: R jR kSiOI (wherein R and R each stand for a group selected from the group consisting of 1-4C alkyl groups, 2-4C alkenyl groups, and a phenyl group; j and k are respective no. of 0 to 1.4, provided that j +k=0.6 to 1.4; and l is a no. of 1.3 to 1.7, provided that 2l+j+k=4) is dissolved in an aq.soln. of an alkali hydroxide, followed by removal of cations by an ion exchange method. The soln. thus obtained is subjected to gelation at 50 deg.C or above and a pH of 10 or above to obtain the fine spherical silicone particles having an average particle size of 0.1 to 20mum.

    PRODUCTION OF SPHERICAL FINE SILICONE PARTICLE
    33.
    发明专利
    PRODUCTION OF SPHERICAL FINE SILICONE PARTICLE 失效

    公开(公告)号：JPH0488023A

    公开(公告)日：1992-03-19

    申请号：JP20294590

    申请日：1990-07-30

    Applicant: TORAY INDUSTRIES

    Inventor： WATANABE TETSUYA ,  AIZAWA HIDEYUKI ,  NAGAI YOSHIYUKI

    IPC: C08G77/06

    Abstract: PURPOSE:To obtain the subject fine particles, having an extremely narrow particle size distribution, excellent in water repellency, heat resistance and slippery characteristics and useful as cosmetics, etc., by stirring a methyltrialkoxysilane, etc., and water, preparing a homogeneous solution and then adding an alkali thereto. CONSTITUTION:A methyltrialkoxysilane (e.g. methyltrimethoxysilane) or a partially hydrolyzed condensate thereof or both are hydrolyzed and condensed to produce spherical fine silicone particles (preferably having

    PREPARATION OF AMINOOSCHIFF BASE
    35.
    发明专利
    PREPARATION OF AMINOOSCHIFF BASE 失效

    公开(公告)号：JPS54125654A

    公开(公告)日：1979-09-29

    申请号：JP3029678

    申请日：1978-03-16

    Applicant: TORAY INDUSTRIES

    Inventor： SETSUDA TSUTOMU ,  AIZAWA HIDEYUKI ,  KIMURA TAKESHI

    IPC: C07D223/04 ,  C07D207/20 ,  C07D211/70

    Abstract: PURPOSE:To obtain the title compound useful as an intermediate for the synthesis of high polymers in high yield readily in a short time, by dry distillation of epsilon-caprolactam, its ring opening polymer, or epsilon-aminocaproic acid in the presence of LiOH in a specific temperature range. CONSTITUTION:epsilon-Caprolactam, its ring opening polymer nylon 6, or epsilon-aminocaproic acid is dried up by distillation in the presence of LiOH(a strong basic decarboxylating agent) at 300-400 deg.C while distilling the reaction product amino- Schiff base. The LiOH is used in a molar amount of 1 to 2.5 times that of carbonyl groups in the raw material, and preferably monohydrate. USE:An intermediate of raw materials, e.g. alpha, omega-undecamethylenediamine, for the synthesis of high polymers.

    PREPARATION OF LITHIUM AMINOALKANECARBOXYLATE
    36.
    发明专利
    PREPARATION OF LITHIUM AMINOALKANECARBOXYLATE 失效

    公开(公告)号：JPS54125612A

    公开(公告)日：1979-09-29

    申请号：JP3029878

    申请日：1978-03-16

    Applicant: TORAY INDUSTRIES

    Inventor： SETSUDA TSUTOMU ,  AIZAWA HIDEYUKI ,  KIMURA TAKESHI

    IPC: C07C227/00 ,  C07C67/00 ,  C07C227/18 ,  C07C229/08 ,  C09D5/00

    Abstract: PURPOSE:To obtain the title compound, useful as a raw material of amino Schiff salt (polymeric material), by heating a mixture of an aqueous or alcoholic solution of omega-aminoalkanecarboxylic acid and lithium carbonate, thereby effecting the neutralization with the weak base. CONSTITUTION:A mixture of an aqueous solution or alcoholic solution (C1-4 lower alcohol) of omega-aminoalkanecarboxylic acid, e.g. epsilon-aminocaproic acid, gamma-aminobutylic acid etc., and lithum carbonate is heated at >= 65 deg.C to prepare lithium salt of omega- aminoalkanecarboxylic acid of formula I. The lithium carbonate is preferably used in an amount of >= 0.5 mol to 1 mol of the starting material.

    PRODUCTION OF SPHERICAL FINE SILICONE PARTICLE
    40.
    发明专利
    PRODUCTION OF SPHERICAL FINE SILICONE PARTICLE 失效

    公开(公告)号：JPH0488022A

    公开(公告)日：1992-03-19

    申请号：JP20294490

    申请日：1990-07-30

    Applicant: TORAY INDUSTRIES

    Inventor： WATANABE TETSUYA ,  AIZAWA HIDEYUKI ,  NAGAI YOSHIYUKI

    IPC: C08G77/06

    Abstract: PURPOSE:To obtain the subject fine particles of shape close to true spheres and useful as cosmetics, etc., in a short time according to simple operation by respectively specifying the pH of an aqueous solution of an alkali and the amount of a methyltrialkoxysilane added. CONSTITUTION:(A) A methyltrialkoxysilane or a partial hydrolyzate condensate thereof or both are added into (B) an aqueous solution of an alkali (e.g. caustic soda), hydrolyzed and condensed. In the process, the pH of the component (B) is regulated to 10-13 and the amount of the component (A) added is

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