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    • 3. 发明授权
    • Preparation of N-hydroxypyrazoles
    • N-羟基吡唑的制备
    • US4945167A
    • 1990-07-31
    • US367047
    • 1989-06-16
    • Ulf BausWolfgang ReutherErwin Hahn
    • Ulf BausWolfgang ReutherErwin Hahn
    • C07D231/12C07D231/16C07D521/00
    • C07D231/12C07D231/16C07D233/56C07D249/08
    • N-hydroxypyrazoles of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 may be identical or different and are each hydrogen or halogen, are prepared by a process in which a pyrazole of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 have the meanings stated for formula I, is reacted with an aliphatic or aromatic peroxocarboxylic acid, preferably in the presence of from 0 to 15 moles of an alkali metal hydroxide, alkaline earth metal hydroxide, alkali meteal carbonate or alkaline earth metal carbonate in such a way that the reaction temperature is from -5.degree. C. to 60.degree.C.The reaction can be carried out in water as a solvent or in a 2-phase system consisting of water and an inert organic solvent which is poorly miscible with water, in the presence or absence of a suitable phase transfer catalyst. The peroxocarboxylic acid can be prepared in the reaction mixture before the reaction from H.sub.2 O.sub.2 and an acyl halide or a carboxylic anhydride or can be used in the form of an alkali metal salt or alkaline earth metal salt.
    • 其中R 1,R 2和R 3可以相同或不同并且各自为氢或卤素的通式I(I)的N-羟基吡唑通过其中通式II的吡唑(IMAGE)( II)其中R 1,R 2和R 3具有式I所述的含义,与脂族或芳族过氧羧酸反应,优选在0至15摩尔碱金属氢氧化物,碱土金属氢氧化物,碱金属碳酸盐 或碱土金属碳酸盐,使得反应温度为-5℃至60℃。该反应可以在作为溶剂的水中或在由水和惰性有机物组成的2相体系中进行 在有或没有合适的相转移催化剂的情况下与水很难混溶的溶剂。 过氧化羧酸可以在与H 2 O 2和酰卤或羧酸酐反应之前在反应混合物中制备,或者可以以碱金属盐或碱土金属盐的形式使用。
    • 9. 发明授权
    • Modified melamine-formaldehyde resins
    • 改性三聚氰胺 - 甲醛树脂
    • US5939515A
    • 1999-08-17
    • US390
    • 1998-01-29
    • Erhard GuentherWolfgang Reuther
    • Erhard GuentherWolfgang Reuther
    • C07D251/18C08G14/09C08G14/10C08G12/30
    • C08G14/10C07D251/18
    • Condensation of products obtained by condensation of a mixture comprising(A) from 90 to 99.9 mol % of a mixture consisting essentially of(a) from 30 to 100 mol % of melamine and(b) from 0 to 70 mol % of a substituted melamine of the formula I ##STR1## where X, X' and X" are as defined in the specification, or mixtures of melamines I, and(c) from 1 to 70 mol %, based on (a)+(b), of a substituted triazine of the formula II ##STR2## where R", Z' and Z" are as defined in the specification, or mixtures of triazines II, and(B) from 0.1 to 10 mol %, based on (A) (a), (A) (b) and (B), of phenols which are unsubstituted or are substituted by radicals selected from the group consisting of C.sub.1 -C.sub.9 -alkyl and hydroxyl, C.sub.1 -C.sub.4 -alkanes substituted by two or three phenol groups, di(hydroxyphenyl)sulfones or mixtures of these phenols,withformaldehyde or formaldehyde-supplying compounds in a molar ratio of melamine, substituted melamine I and triazine II to formaldehyde within the range from 1:1.15 to 1:4.5, are useful for making molded articles.
    • PCT No.PCT / EP96 / 03352 Sec。 371日期1998年1月29日 102(e)1998年1月29日PCT PCT 1996年7月30日PCT公布。 公开号WO97 / 07149 日期1997年2月27日缩短由(A)90-99摩尔%的(A)30〜100摩尔%的三聚氰胺和(b)0〜70摩尔组成的混合物 基于(a)+(b)的式I的取代三聚氰胺的%,其中X,X'和X“如本说明书中所定义,或三聚氰胺I和(c)1至70摩尔%的混合物 ),其中R“,Z'和Z”如说明书中所定义的取代的三嗪或三嗪II和(B)的混合物为0.1-10mol%,基于(A) (a),(A)(b)和(B))未被取代或被选自C 1 -C 9 - 烷基和羟基的基团取代的酚,(C) 基团,二(羟基苯基)砜或这些酚的混合物与甲醛或甲醛供应化合物以三聚氰胺,取代的三聚氰胺I和三嗪II的摩尔比与1:1的甲醛反应。 15至1:4.5,可用于制造模塑制品。