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    • 9. 发明申请
    • PROCESS FOR PREPARING (METH)ACRYLATES
    • 制备(甲基)丙烯酸酯的方法
    • US20100280205A1
    • 2010-11-04
    • US12745703
    • 2008-09-29
    • Joachim KnebelRalf MerbachGuido ProtzmannKlaus GottmannJohn HirshGerold SchmittDieter TessmerWilhelm KarnbrockWolfgang KlesseVolker Kerscher
    • Joachim KnebelRalf MerbachGuido ProtzmannKlaus GottmannJohn HirshGerold SchmittDieter TessmerWilhelm KarnbrockWolfgang KlesseVolker Kerscher
    • C08F120/12C07C69/54
    • C07C67/03C08F20/18C08F120/12C07C69/54
    • 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 l/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.
    • 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特定的总氧气输入量小于或等于 至1.0l / kg,以公斤式(I)的(甲基)丙烯酸酯计,氧气的导入量在25℃,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。
    • 10. 发明授权
    • Process for the preparation of macromers
    • 制备大分子单体的方法
    • US06388026B1
    • 2002-05-14
    • US08906141
    • 1997-08-05
    • J. David CampbellMichihiro KaaiDavid D. SchatzFouad Teymour
    • J. David CampbellMichihiro KaaiDavid D. SchatzFouad Teymour
    • C08F2018
    • C08F2/02C08F120/12
    • A process for preparing low molecular weight homomacromers and comacromers which includes (a) charging a reactor with (i) ethylenically unsaturated monomers selected from the group consisting of acrylic monomers or monoalkenyl aromatic monomers and (ii) if said ethylenically unsaturated monomer is not a thermally initiating monomer, a free radical polymerizable initiator, to form a polymerizable reaction charge. The reaction charge is heated during continuous mixing in the reactor to reaction temperature in the range from about 180° C. to about 500° C. for a residence time greater than 5 minutes to form the low molecular weight homomacromers or comacromers. If the residence time is 60 minutes or less, the reaction temperature is greater than 270° C. and if the reaction charge is a mixture of acrylic monomer and monoalkenyl monomer and the residence time is 60 minutes or less then the reaction temperature is greater than 310° C.
    • 一种制备低分子量同质异构体和共聚物的方法,其包括(a)向(i)选自丙烯酸单体或单链烯基芳族单体的烯键式不饱和单体和(ii)所述烯属不饱和单体不是热的 引发单体,自由基可聚合引发剂,形成可聚合反应的电荷。 将反应装料在反应器中连续混合期间加热至约180℃至约500℃范围内的反应温度,停留时间大于5分钟以形成低分子量同型异构体或可变光体。 如果停留时间为60分钟以下,则反应温度大于270℃,如果反应物为丙烯酸单体和单烯基单体的混合物,停留时间为60分钟以下,则反应温度大于 310℃