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    • 1. 发明授权
    • Preparation of polyphenylene ethers
    • 聚苯乙烯的制备
    • US5171825A
    • 1992-12-15
    • US695385
    • 1991-05-03
    • Carola Hedtmann-ReinBernhard CzaudernaMartina von DeessenKarl Hennig
    • Carola Hedtmann-ReinBernhard CzaudernaMartina von DeessenKarl Hennig
    • C08G65/38C08G65/44
    • C08G65/44
    • A process for preparing polyphenylene ethers from monohydric phenols which have alkyl substituents in both ortho positions and possibly also in one meta position but not in the para position, by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst and of an electrically conducting compound which counteracts the electrostatic charge in the reaction mixture, in organic solution, comprises using as electrically conducting compound a salt of a carboxamide derivative of the formula I ##STR1## or mixtures of such salts, where R.sup.1 is a saturated or singly or multiply unsaturated aliphatic group which can have a terminal phenyl group and which contains a total of 8-30 carbon atoms, it also being possible for these carbon atoms to be interrupted by isolated oxygen atoms,R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl,A is an aliphatic, araliphatic or cycloaliphatic or aromatic bridge of up to 10 carbon atoms,n and m are each 1 to 3,Q.sup..sym. is ammonium, an alkali metal cation or the equivalent of an alkaline earth metal cation or a cation of a metal of groups IVb to VIIb of the periodic table.
    • 在氧化催化剂存在下,通过与含氧气体的氧化偶联和电化学反应,由一元酚制备聚苯醚的方法,它们在邻位和可能还在一个间位而不是在对位具有烷基取代基 在有机溶液中抵抗反应混合物中的静电荷的导电化合物包括使用式I的羧酰胺衍生物或其混合物作为导电化合物的盐或其混合物,其中R1是饱和或单独或 可以具有末端苯基并且含有总共8-30个碳原子的多重不饱和脂族基团,这些碳原子也可以被分离的氧原子中断,R2是氢或C1-C4-烷基,A 是至多10个碳原子的脂族,芳脂或脂环族或芳族桥,n和m各自为1至3,Q(+)为铵,碱金属阳离子 或当量的碱金属阳离子或元素周期表IVb至VIIb族金属的阳离子。
    • 8. 发明授权
    • Method for producing polybutadiene latex with an optimized thermal current profile
    • 具有优化的热电流分布的聚丁二烯胶乳的生产方法
    • US06852797B2
    • 2005-02-08
    • US10257717
    • 2001-04-24
    • Sabine OepenMichael BreulmannNorbert GüntherbergKlaus-Dieter HungenbergNorbert NiessnerBernhard CzaudernaWil Duijzings
    • Sabine OepenMichael BreulmannNorbert GüntherbergKlaus-Dieter HungenbergNorbert NiessnerBernhard CzaudernaWil Duijzings
    • C08F2/22C08F2/32C08F236/06C08F279/02C08F279/04
    • C08F279/02C08F236/06Y10S525/942C08F2/22
    • A polybutadiene latex is prepared by a process in which butadiene is polymerized by free radical emulsion polymerization in the presence of initiator and, if required, dispersants and further conventional assistants, the polymerization being carried out in the presence of reactive comonomers in such a way that the heat flow of 43 watt/kg solids content of the polymerization mixture is not exceeded. Owing to the presence of reactive comonomers, the reaction rate at the beginning of the reaction is increased, with the result that an overall flatter heat flow profile is obtained. A preferred reactive comonomer is styrene. Preferably, the process is carried out by a semi-batch procedure in which (a) in a first stage, a portion of butadiene and at least one portion of reactive comonomer in the form of an aqueous emulsion are initially taken with a thermal polymerization initiator and, if required, dispersants and further conventional assistants and the polymerization is initiated, (b) in a second stage, the remaining amount of butadiene and, if required, the remaining amount of reactive comonomer are added undiluted or in the form of an aqueous emulsion, if required with dispersants and, if required, further conventional assistants, as a feed.
    • 聚丁二烯胶乳是通过一种方法制备的,其中丁二烯在引发剂存在下通过自由基乳液聚合聚合,如果需要的话,通过分散剂和其它常规助剂,聚合反应在反应性共聚单体的存在下进行,使得 不超过聚合混合物的43瓦特/千克固体含量的热流。 由于反应性共聚单体的存在,反应开始时的反应速率增加,结果得到整体平坦的热流分布。 优选的反应性共聚单体是苯乙烯。 优选地,该方法通过半间歇方法进行,其中(a)在第一阶段中,一部分丁二烯和至少一部分水性乳液形式的反应性共聚单体最初用热聚合引发剂 并且如果需要,分散剂和其它常规助剂并开始聚合,(b)在第二阶段中,剩余量的丁二烯和如果需要的话,反应性共聚单体的剩余量未稀释或以水性形式加入 乳液,如果需要与分散剂,并且如果需要,作为进料的其它常规助剂。
    • 9. 发明授权
    • Method for producing caoutchouc particles
    • 橡胶颗粒的制备
    • US06723774B2
    • 2004-04-20
    • US10221080
    • 2002-09-10
    • Norbert GüntherbergBernhard CzaudernaMichael BreulmannSabine OepenWil DuijzingsNorbert Niessner
    • Norbert GüntherbergBernhard CzaudernaMichael BreulmannSabine OepenWil DuijzingsNorbert Niessner
    • C08F3600
    • C08F36/04Y10S525/902C08F2/24
    • The invention relates to a method for producing caoutchouc particles (K) by means of emulsion polymerisation in the presence of an emulsifier and a polymerisation initiator. Said particles contain A) 80 to 100 wt. % of one or more conjugated diene monomers (A) in relation to (K) and B) 0 to 20 wt. % of one or more monoethylenically unsaturated comonomers (B) in relation to (K) in the polymerised form. The inventive method is characterised in that 1) a mixture (M1) containing water and an emulsifier is provided, 2) a mixture (M2) containing one or more monomers in the monomer or polymerised form selected from styrole, &agr;-methylstyrole, butadiene, n-butylacrylate, MMA and acrylnitrile and optionally comonomers is added, 3) polymerisation of the obtained mixture starts in the presence of a polymerisation initiator at temperature of 5 to 95° C., 4) a mixture (M3) containing 0 to 100 wt. % of the comonomers (B) in relation to (B) and 0 to 25 wt. % of the diene monomers (A) in relation to (A) is added, 5) a mixture (M4) containing the (remaining) diene monomers (A) and the (remaining) comonomers (B) is proportioned and polymerised and 6) polymerisation is terminated when there is conversion of more than 90 and less than 95% in relation to the sum of the monomers.
    • 本发明涉及一种在乳化剂和聚合引发剂存在下,通过乳液聚合来生产酚醛树脂颗粒(K)的方法。 所述颗粒包含A)80至100重量% 一个或多个共轭二烯单体(A)相对于(K)和B)的%为0-20重量% %的一种或多种单烯属不饱和共聚单体(B)相对于聚合形式的(K)。 本发明的方法的特征在于:1)提供含有水和乳化剂的混合物(M1),2)含有一种或多种选自苯乙烯,α-甲基苯甲醛,丁二烯的单体或聚合形式的单体的混合物(M2) 丙烯酸正丁酯,MMA和丙烯腈和任选的共聚单体; 3)所得混合物的聚合在聚合引发剂存在下开始,温度为5至95℃,4)含有0-100重量份的混合物 。 共聚单体(B)的相对于(B)和0-25重量% 加入相对于(A)的二烯单体(A)的%,5)含有(剩余的)二烯单体(A)和(剩余的)共聚单体(B)的混合物(M4)成比例和聚合,和6) 当相对于单体的总和转化率大于90且小于95%时,聚合终止。