公开(公告)号：US20160046556A1

公开(公告)日：2016-02-18

申请号：US14924018

申请日：2015-10-27

申请人： Joachim KNEBEL ,  Ralf MERBACH ,  Guido PROTZMANN ,  Klaus GOTTMANN ,  John HIRSH ,  Gerold SCHMITT ,  Dieter TESSMER ,  Wilhelm KARNBROCK ,  Wolfgang KLESSE ,  Volker KERSCHER

发明人： Joachim KNEBEL ,  Ralf MERBACH ,  Guido PROTZMANN ,  Klaus GOTTMANN ,  John HIRSH ,  Gerold SCHMITT ,  Dieter TESSMER ,  Wilhelm KARNBROCK ,  Wolfgang KLESSE ,  Volker KERSCHER

IPC分类号： C07C67/03

CPC分类号： C07C67/03 ,  C08F20/18 ,  C08F120/12 ,  C07C69/54

摘要： Process for preparing (meth)acrylates of the formula (I) CH2═C(R1)—CO—O—R2   (I) in which R1 is hydrogen or methyl and R2 is a saturated or unsaturated, linear or branched, aliphatic or cyclic alkyl radical having 6 to 22 carbon atoms, or a (C6-C14)-aryl-(C1-C8)-alkyl radical; by reacting a (meth)acrylate of the formula II CH2═C(R1)—CO—OR3   (II) with an alcohol of the formula (III) HO—R2   (III) in the presence of an amount of a suitable catalyst which catalyses the reaction and of an amount of a phenolic polymerization inhibitor or a combination of two or more phenolic polymerization inhibitors which is sufficient to inhibit undesired polymerization; the reaction being undertaken with input or introduction into the reaction mixture resulting from the reaction of an amount of oxygen or of an oxygenous gas mixture sufficient to inhibit undesired polymerization, and the process is characterized in that the specific total oxygen input is less than or equal to 1.0 1/kg, measured in litres of oxygen per kilogram of (meth)acrylate of the formula (I), where the volume of oxygen introduced is calculated at a temperature of 25° C. and a pressure of 101 325 pascal. The resulting (meth)acrylates can surprisingly be processed to particularly high molecular weight emulsion polymers which are, for example, outstandingly suitable for use as flow resistance reducers in mineral oil extraction.

摘要翻译： 制备式（I）的（甲基）丙烯酸酯的方法，其中R 1是氢或甲基，R 2是饱和或不饱和的，直链或支链的脂族或环状的 具有6至22个碳原子的烷基或（C 6 -C 14） - 芳基 - （C 1 -C 8） - 烷基; 通过使式II CH 2 = C（R 1）-CO-OR 3（II）的（甲基）丙烯酸酯与式（III）的醇HO-R 2（III）在一定量的合适的催化剂存在下反应， 催化反应和一定量的酚聚合抑制剂或两种或多种酚聚合抑制剂的组合，其足以抑制不期望的聚合; 反应是通过输入或引入反应混合物中进行的，所述反应混合物是由一定量的氧气或足够抑制不期望的聚合的氧气混合物的反应而产生的，并且该方法的特征在于，具体的总氧气输入量小于或等于 至1.01 / kg，以公斤式（I）的（甲基）丙烯酸酯计，氧气的导入量在25℃的温度和压力为101 325帕斯卡时计算。 所得到的（甲基）丙烯酸酯可以令人惊奇地加工成特别高分子量的乳液聚合物，例如非常适合用作矿物油提取中的阻流剂。