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1895 条记录 (耗时 0.018 秒)

    PRODUCTION OF POLYVINYLAMINE POWDER
    94.
    发明专利
    PRODUCTION OF POLYVINYLAMINE POWDER 失效

    公开(公告)号：JPH07118333A

    公开(公告)日：1995-05-09

    申请号：JP26222293

    申请日：1993-10-20

    申请人： MITSUBISHI CHEM CORP

    发明人： SAWAYAMA SHIGERU ,  MORI KOJI ,  UENO NOBUHIKO

    IPC分类号： C08F6/12 ,  C08F6/00 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02

    摘要： PURPOSE:To produce a powder of free polyvinylamine efficiently by a relatively simple and convenient process by adding an excess amt. of a basic compd. to an aq. soln. of polyvinylamine or its salt and separating the resulting deposit from the soln. CONSTITUTION:A powder of free polyvinylamine with a high purity hardly attainable by the conventional process is efficiently produced by adding an excess amt. of a basic compd. (e.g. NaOH) to an aq. soln. of polyvinylamine (usually one obtd. by hydrolyzing an N-vinylformamide or N-vinylacetamide polymer or by the Hofmann reaction of polyacrylamide) or its salt and separating the resulting deposit from the soln.

    HYDROPHILIC TACKY AGENT COMPOSITION
    99.
    发明专利
    HYDROPHILIC TACKY AGENT COMPOSITION 失效

    公开(公告)号：JPH06346041A

    公开(公告)日：1994-12-20

    申请号：JP13869093

    申请日：1993-06-10

    申请人： SHOWA DENKO KK

    发明人： ISHII TETSUYA ,  ECHIGO KEIKO ,  YAMAGUCHI TETSUHIKO

    IPC分类号： C08F220/06 ,  C08F26/00 ,  C08F220/04 ,  C08F226/02 ,  C08K5/05 ,  C08L31/02 ,  C08L31/04 ,  C09J137/00 ,  C09J139/02

    摘要： PURPOSE:To obtain the subject composition having no reduction in physical properties such as adhesion, tack and retaining power with time of a tacky agent even in the presence of a salt, an alcohol and an aqueous liquid, readily peelable with water in the case of removing a bonded material, capable of cleanly removing the tacky agent without leaving the tacky agent on a material to be bonded, having no irritation and high safety in bonding to the skin. CONSTITUTION:A hydrophilic tacky agent composition consists essentially of a mixture substantially obtained by blending an N-vinylacetamide polymer or copolymer with a polyhydric alcohol in the weight ratio of 70:30 to 40:60.

    NEW PERFLUOROPOLYMER
    100.
    发明专利
    NEW PERFLUOROPOLYMER 失效

    公开(公告)号：JPH06340710A

    公开(公告)日：1994-12-13

    申请号：JP15126893

    申请日：1993-05-28

    申请人： ASAHI GLASS CO LTD

    发明人： WATAKABE ATSUSHI ,  MIYAKE HARUHISA

    IPC分类号： C08F8/48 ,  C08F16/14 ,  C08F16/28 ,  C08F16/32 ,  C08F26/00 ,  C08F226/06

    摘要： PURPOSE:To provide a new perfluoropolymer cross-linked in a high density, high in thermal distortion temperature and having a high elastic modulus at high temperatures by trimerizing the cyano group of a perfluorovinyl ether compound having a cyano group and subsequently polymerizing the vinyl ether group of the trimerization product. CONSTITUTION:A cyano group-having perfluoro compound of the formula (R is 1-15C perfluoroalkylene group or perfluorooxyalkylene group) (e.g. perfluoro-4- oxa-6-heptenonitrile) is put in an autoclave, and reacted in the presence of copper powder at 150 deg.C for 3 days to trimerize the cyano group of the compound of the formula (triazine ring formation reaction). The produced perfluorovinyl ether group-having triazine derivative is subjected to the radical polymerization of its vinyl group in the presence of a radical polymerization initiator such as diisopropyl perfluorodicarbonate to provide the objective perfluoropolymer cross-linked in a high density.