ACRYLONITRILE-BASED POLYMER AND ITS PRODUCING METHOD

    公开(公告)号:JP2002161114A

    公开(公告)日:2002-06-04

    申请号:JP2000360738

    申请日:2000-11-28

    Abstract: PROBLEM TO BE SOLVED: To provide a PAN-based polymer suitable for industrial production, which has a narrow molecular weight distribution, good stretchability and a good balance of mechanical properties, processability and production cost, and its producing method. SOLUTION: The PAN-based polymer of the present invention is featured by Mw of 10,000-400,000 and Mw/Mn of 1.3-2.0, and the method for producing the PAN-based polymer is featured by adding 0.001-1 mol% of a potential stable radical source based on total vinyl monomers of the copolymerization system.

    COMPLEX
    12.
    发明专利
    COMPLEX 失效

    公开(公告)号:JP2002003270A

    公开(公告)日:2002-01-09

    申请号:JP2000178269

    申请日:2000-06-14

    Abstract: PROBLEM TO BE SOLVED: To provide a complex for a fiber-reinforced fireproof composite material having good fire resistance, light weight, strength, durability, moldability, and good balance for degree of selective freedom of reinforcing fiber substances, which are very difficult to realize in with the prior art, and especially used for construction, civil engineering, and transportation. SOLUTION: The complex becomes fiber-reinforced composite materials by curing matrix materials, which comprise the essential components [A] alkali silicates, [B] calcium silicate having average particle diameter 0.1-10 μm without hydration activity under room temperature and normal pressure, and [C] water.

    (E)-7-DECENE-4-OLIDE AND PERFUME COMPOSITION CONTAINING THE SAME

    公开(公告)号:JPH07118254A

    公开(公告)日:1995-05-09

    申请号:JP29111993

    申请日:1993-10-18

    Abstract: PURPOSE:To obtain a novel (E)-7-decene-4-olide useful as a perfume composition having a green feeling, perfume characteristics such as milk-like, butter-like, fruit-like or jasmine-like fragrance, swelling and sweetness. CONSTITUTION:Air in a four-necked flask is replaced with nitrogen and the flask is charged with methyl 4-oxobutyrate and dried tetrahydrofuran. The reactor is cooled with ice and a solution of (E)-3-hexenylmagnesium bromide in tetrahydrofuran is dripped into the reactor, stirred for two hours under cooling with ice and mixed with a saturated aqueous solution of ammonium chloride to separate an organic layer. The organic layer is washed with water and a saturated aqueous solution of salt, dried with anhydrous sodium sulfate, and the solvent is distilled away. The residue is subjected to vacuum distillation to give the new (E)-7-decene-olide exhibited by the formula, useful for a perfume composition, suitable as various compounding materials, and having a green feeling, perfume characteristics such as milk-like, butter-like, fruit-like or jasmine-like fragrance, swelling and sweetness.

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