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    • 92. 发明授权
    • Triazine derivative, process for preparing the same and herbicide using
the same
    • 三嗪衍生物,其制备方法和使用其的除草剂
    • US5529977A
    • 1996-06-25
    • US326830
    • 1994-10-21
    • Katsumasa HaradaTakaaki AbeYuji AkiyoshiAkio MatsushitaMikio KojimaIkuo ShiraishiKaoru YamamotoTakashi Hayama
    • Katsumasa HaradaTakaaki AbeYuji AkiyoshiAkio MatsushitaMikio KojimaIkuo ShiraishiKaoru YamamotoTakashi Hayama
    • A01N43/54A01N43/66C07D239/60C07D251/30C07D251/38C07D521/00C07D251/34C07D251/16C07D403/12
    • C07D231/12A01N43/54A01N43/66C07D233/56C07D239/60C07D249/08C07D251/30C07D251/38
    • Disclosed are a pyrimidine or triazine compound represented by the following formula (I): ##STR1## wherein R.sup.1 represents cyano group, a halogen atom, hydroxy group or --O--R.sup.7 where R.sup.7 represents a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a halo-lower alkyl group or a cyano-lower alkyl group; R.sup.2 represents hydrogen atom or a lower alkyl group; R.sup.3 represents hydrogen atom or a lower alkyl group; R.sup.4 represents a 1-imidazolyl group, --NHSO.sub.2 --R.sup.8 where R.sup.8 represents a lower alkyl group or a phenyl group which may have a substituent, hydroxy group, a lower alkoxy group or a benzyloxy group when Z is nitrogen atom; or a 1-imidazolyl group, --NHSO.sub.2 --R.sup.8 where R.sup.8 has the same meaning as defined above, hydroxy group, OK, a lower alkoxy group which may have a substituent, a lower alkenyloxy group, a lower alkynyloxy group, a cycloalkoxy group which may have a substituent, a phenoxy group, a benzyloxy group, a lower alkylthio group, a phenylthio group or an alkylsulfonylamino group when Z is --CH.dbd. group; R.sup.5 represents a lower alkoxy group; R.sup.6 represents a lower alkoxy group or a lower alkyl group; X represents oxygen atom or sulfur atom; and Z represents nitrogen atom or --CH.dbd. group.processes for preparing the same and a herbicide containing the same as an active ingredient(s).
    • 公开了由下式(I)表示的嘧啶或三嗪化合物:其中R 1表示氰基,卤素原子,羟基或-O-R 7,其中R 7表示低级烷基,低级烯基 基,低级炔基,卤代低级烷基或氰基 - 低级烷基; R2表示氢原子或低级烷基; R3表示氢原子或低级烷基; R 4表示当Z为氮原子时,可以具有取代基,羟基,低级烷氧基或苄氧基的低级烷基或苯基,-NHSO 2 -R 8, 或1-咪唑基,-NHSO 2 -R 8,其中R8具有与上述相同的含义,羟基,OK,可具有取代基的低级烷氧基,低级链烯氧基,低级炔氧基,环烷氧基 当Z为-CH =基团时,可具有取代基,苯氧基,苄氧基,低级烷硫基,苯硫基或烷基磺酰基氨基; R5代表低级烷氧基; R6代表低级烷氧基或低级烷基; X表示氧原子或硫原子; Z表示氮原子或-CH =基团。 其制备方法和含有其作为活性成分的除草剂。
    • 95. 发明授权
    • Process for producing polyoxymethylene copolymer having reduced amount
of unstable terminal groups
    • 具有减少量的不稳定末端基团的聚甲醛共聚物的制备方法
    • US5344911A
    • 1994-09-06
    • US26130
    • 1993-03-05
    • Kaoru YamamotoNagayoshi MaedaMakoto KamiyaToshiro MuraoGerhard ReuschelDietrich Fleischer
    • Kaoru YamamotoNagayoshi MaedaMakoto KamiyaToshiro MuraoGerhard ReuschelDietrich Fleischer
    • C08G2/10C08G2/28C08G4/00C08G6/00
    • C08G2/28C08G2/10
    • Processes for producing a polyoxymethylene copolymer includes forming a crude polyoxymethylene copolymer by subjecting a reaction system containing trioxane, a cyclic ether or cyclic formal comonomer, and a catalyst (e.g., boron trifluoride or a coordination compound thereof) to copolymerization reaction conditions. During copolymerization, both the total content of impurities and catalyst in the copolymerization reaction system are adjusted. In this regard, the impurities content (i.e., those compounds which form unstable end groups in the polyoxymethylene copolymer and/or those compounds having a chain-terminating or chain-transfer function) in the copolymerization reaction system is adjusted to 1.times.10.sup.-2 mole percent or less based on the total monomer amount, while the the content of the catalyst in the copolymerization reaction system to between 1.times.10.sup.-3 to 1.times.10.sup.-2 mole percent based on the total monomer amount. Immediately after copolymerization has been completed, the crude polyoxymethylene copolymer is quenched to a temperature of 45.degree. C. or less within 30 seconds after completion of copolymerization. Quenching of the crude polyoxymethylene copolymer is preferably simultaneously accompanied by deactivation of the catalyst by bringing the crude polyoxymethylene copolymer immediately following completion of copolymerization into contact with a cold liquid which contains a catalyst deactivator.
    • 用于制备聚甲醛共聚物的方法包括通过使含有三恶烷,环醚或环状形式共聚单体的反应体系和催化剂(例如三氟化硼或其配位化合物)进行共聚反应条件来形成粗聚甲醛共聚物。 在共聚过程中,调节共聚反应体系中杂质和催化剂的总含量。 在这方面,将共聚反应体系中的杂质含量(即,在聚甲醛共聚物中形成不稳定端基的那些化合物和/或具有链终止或链转移功能的那些化合物)调节至1×10 -2摩尔% 或更少,而共聚反应体系中催化剂的含量相对于总单体量为1×10 -3〜1×10 -2摩尔%。 共聚完成后立即将聚甲醛共聚物在共聚完成后30秒钟内淬火至45℃以下。 粗聚甲醛共聚物的淬火优选同时伴随着催化剂的失活,使粗聚甲醛共聚物在完成共聚后立即与含有催化剂失活剂的冷液接触。
    • 96. 发明授权
    • Process for preparing cyclic polyoxymethylene
    • 制备环状聚甲基乙烯的方法
    • US5248762A
    • 1993-09-28
    • US844583
    • 1992-03-30
    • Kaoru YamamotoToshio Shiwaku
    • Kaoru YamamotoToshio Shiwaku
    • C08G2/28C08G2/30C08G2/36
    • C08G2/28C08G2/36
    • Cyclic polyoxymethylene having a number-average molecular weight of 500 to 5,000 is obtained by solid state cyclization reaction of an alkalidegradative linear oxymethylene homopolymer in the presence of a medium containing a cationic catalyst.The cyclization is effected at 10.degree. to 150.degree. C. for 1 to 500 minutes in an organic liquid medium.The reaction mixture obtained by the cyclization is treated with an alkaline medium to hydrolyze and remove away unreacted linear polyoxymethylene homopolymer, and isolate the cyclic polyoxymethylene.The product has a sharp molecular weight distribution and is useful as a resin improver.
    • PCT No.PCT / JP91 / 01089第 371日期:1992年3月30日 102(e)1992年3月30日PCT PCT 1991年8月15日PCT公布。 出版物WO92 / 03487 日本1993年3月5日。数均分子量为500〜5000的环氧聚甲醛是通过碱处理线性甲醛均聚物在含有阳离子催化剂的介质存在下的固相环化反应得到的。 在有机液体介质中,在10℃至150℃下进行1至500分钟的环化。 通过环化得到的反应混合物用碱性介质处理以水解和除去未反应的线性聚甲醛均聚物,并分离出环状聚甲醛。 该产品具有尖锐的分子量分布,可用作树脂改良剂。