会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明专利
    • POLYURETHANE AND MOLDED ARTICLE COMPRISING THE SAME
    • CA2161824A1
    • 1996-05-17
    • CA2161824
    • 1995-10-31
    • KURARAY CO
    • OSHITA TATUYANAKAYAMA KIMIOISHIGURO MICHIHIROHIRAI KOJISUZUKI SHIGEAKIYOSHIMURA NORIAKI
    • C07C45/50C07C47/12C07C51/235C08G18/08C08G18/42C08G18/66C08G63/16C07C69/34C07C55/21
    • The present invention provides a polyurethane comprising a polyester diol component, an organic diisocyanate component and .a chain extender component, 30 mole % or more of dicarboxylic acid units constituting said polyester diol being units from 3,8-dimethyldecanedioic acid unit and/or units from 3,7-dimethyldecanedioic acid unit, said polyester diol having a number-average molecular weight of 500 to 6000; a molded article comprising the same; a polyurethane fiber comprising the same; and said polyester diol. The present invention provides-a process for producing a dimethyldecanedioic acid represented by the general formula (II) HOOC-CH2-CH(CH3)-CH2-CH2-CH2-CH(A)-CH(B)-CH2-COOH (II) wherein either of A and B represents a methyl group and the rest represents a hydrogen atom, which comprises oxidizing a dimethyldecanedial represented by the general formula (I) OHC-CH2-CH(CH3)-CH2-CH2-CH2-CH(A)-CH(B)-CH2-CHO (I) wherein either of. A and B represents a methyl group and the rest represents a hydrogen atom. The present invention provides a dimethyldecanedial represented by the general formula (I). Furthermore, the present invention provides a process for producinq a dimethyldecanedial represented by the general formula (I), comprising hydroformylating a diolefin represented by the general formula (III) CH2=C(CH3)-CH2-CH2-CH2-CH(A)-CH(B)=CH2 (III) wherein either of A and B represents a methyl group and the rest represents a hydrogen atom. The polyurethane of the present invention is superior in various properties such as resistance to hydrolysis, heat resistance, resistance to hot water, cold resistance, fungal resistance and mechanical performances e.g., strength at break and elongation at break, as well as injection moldability. The polyurethane fiber of the present invention is superior in heat resistance, resistance to hot water, cold resistance and resistance to hydrolysis, and is dyeable under high-temperature and high-pressure conditions. Furthermore, it is superior, after dyeing, in tensile strength and elongation, elastic recovery, fungal resistance, resistance to chlorine and color fastness. The dimethyldecanedial of the present invention is useful as a raw material of production of the dimethyldecanedioic acid represented by the general formula (II). Furthermore, the polyester diol containing the dimethyldecanedioic acid as a dicarboxylic acid component, shows excellent resistance to hydrolysis and is useful as a raw material for producing high-performance polyurethanes.
    • 6. 发明专利
    • DE3781425T2
    • 1993-04-01
    • DE3781425
    • 1987-02-18
    • KURARAY CO
    • OTERA JUNZOSUZUKI SHIGEAKIONISHI TAKASHIFUJITA YOSHIJI
    • C07C45/27C07C45/28C07C45/56C07C47/21C07C69/145
    • A process for preparing α,β-unsaturated aldehydes of the general formula (I)in which R', R 2 and R" are independently a hydrogen atom, or an alkyl or alkenyl group with or without being substituted with a lower acyloxy group. The aldehyde of the general formula (I) is prepared by reaction between an allylic chloride of the following general formula (Ila)in which R 1 , R 2 and R 3 have, respectively, the same meanings as defined above, and an amide oxide selected from the group consisting of tri(lower alkyl)amine N-oxides of the formula,in which R 4 represents a lower alkyl group having from 2 to 4 carbon atoms, and N-lower alkylmorpholine N-oxides of the following formulain which R 5 represents a lower alkyl group having from 1 to 4 carbon atoms. Alternatively, the aldehyde of the formula (I) is obtained by reaction between an allylic chloride of the following general formula (IIb)in which R 1 , R 2 and R 3 have, respectively, the same meanings as defined above, and an amine oxide selected from the group consisting of tri(lower alkyl)amine N-oxides of the formula,in which R 4 has the same meaning as defined above, and N-lower alkylmorpholine N-oxides of the following formulain which R 5 has the same meaning as defined above, in the presence of an alkali metal iodide or a copper halide.