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    • 52. 发明申请
    • Method of emulsion polymerization
    • 乳液聚合方法
    • US20050020787A1
    • 2005-01-27
    • US10922179
    • 2004-08-19
    • Huub AertJoan VermeerschEtienne ThilloJos Huybrechts
    • Huub AertJoan VermeerschEtienne ThilloJos Huybrechts
    • C08F2/00C08F2/22C08F2/24C08F2/38
    • C08F2/24C08F2/22C08F2/38
    • A method has been disclosed of preparing ultrafine hydrophobic latex particles of polymers and copolymers by free radical emulsion polymerization in a water-based system, making use therefor, in order to polymerize or copolymerize monomers or monomer mixtures respectively, of at least one compound selected from the group consisting of dimers and cobalt complexes, acting as a chain transfer agent (CTA), wherein said latex particles have an average particle size of less than 100 nm, being more than 10% lower than if prepared in the absence of said CTA, characterized in that said polymerization is conducted in a water-based reaction in the presence of a chain transfer agent and of a surfactant, wherein said surfactant is present in a concentration versus said monomer or monomer mixture of from 5 up to 25% by weight for a non-ionic surfactant or from 0.05 up to 10% by weight for an ionic surfactant, more particularly a surfactant in a concentration below twice its critical micelle concentration.
    • 已经公开了一种通过在水基体系中通过自由基乳液聚合制备聚合物和共聚物的超细疏水性胶乳颗粒的方法,其用途是分别使单体或单体混合物聚合或共聚至少一种选自 由二聚体和钴配合物组成的组,用作链转移剂(CTA),其中所述胶乳颗粒具有小于100nm的平均粒度,比不存在所述CTA时制备的胶乳颗粒小10%以上, 其特征在于所述聚合在链转移剂和表面活性剂的存在下在水基反应中进行,其中所述表面活性剂以相对于所述单体或单体混合物的浓度存在,其浓度为5至25重量%,用于 非离子表面活性剂或0.05至10重量%的离子表面活性剂,更特别是浓度低于其临界胶束浓度两倍的表面活性剂 ation。
    • 54. 发明授权
    • Continuous process for producing rubbery polymer
    • 生产橡胶聚合物的连续工艺
    • US6077903A
    • 2000-06-20
    • US076289
    • 1998-05-12
    • Hung Dang Ngoc
    • Hung Dang Ngoc
    • C08F2/00C08F2/24C08F2/26C08F220/18C08F265/04C08F283/00C08F285/00C08L51/00C08F267/00
    • C08F285/00C08F265/04C08F283/00C08L51/003
    • There is a need for polymers which are utilized in automotive interiors which offer increased heat and ultraviolet light resistance. It is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance. This invention discloses a continuous process for preparing a rubbery polymer which can be blended with polyvinyl chloride to make leathery compositions having good heat and ultraviolet light resistance. This technique involves utilizing a multiple continuous reactor system wherein a first phase monomer solution containing butyl acrylate, an acrylic monomer, acrylonitrile and a crosslinking agent is continuously charged into at least three initial reactors. To attain a small particle size, it is necessary to limit the solids content in each of these initial reactors. Then, a second phase monomer solution containing styrene, additional acrylonitrile and additional crosslinking agent is continuously charged into a subsequent reactor. This technique can also be utilized to synthesize core/shell or IPN structures by using multistage emulsion polymerization in which the first stage latex contains a majority of the butyl acrylate with a small latex particle size being obtained.
    • 需要用于汽车内部的聚合物,其提供增加的耐热和耐紫外线性。 对于用于汽车仪表和门板的皮肤化合物的聚合物,特别关键的是显示优异的耐热和耐紫外线性。 本发明公开了一种制备橡胶状聚合物的连续方法,该方法可与聚氯乙烯共混以制备具有良好耐热和耐紫外线性的革质组合物。 该技术涉及利用多连续反应器系统,其中将含有丙烯酸丁酯,丙烯酸单体,丙烯腈和交联剂的第一相单体溶液连续加入到至少三个初始反应器中。 为了获得小的粒径,必须限制这些初始反应器中的每一个中的固体含量。 然后,将含有苯乙烯,另外的丙烯腈和另外的交联剂的第二相单体溶液连续加入随后的反应器中。 该技术也可用于通过使用多阶段乳液聚合来合成核/壳或IPN结构,其中第一阶段胶乳含有大部分获得的胶乳粒度小的丙烯酸丁酯。
    • 55. 发明授权
    • Process for producing dispersions of water-soluble vinyl polymers and
stabilizer for carrying out the process
    • 用于生产水溶性乙烯基聚合物和稳定剂分散体的方法,用于进行该方法
    • US6075089A
    • 2000-06-13
    • US125181
    • 1998-10-05
    • Werner JaegerArvid ZimmermannMathias HahnVolker HildebrandtKarl Heinz Reichert
    • Werner JaegerArvid ZimmermannMathias HahnVolker HildebrandtKarl Heinz Reichert
    • B01F17/34C08F2/10C08F2/24C08F283/06C08K5/06C08F2/16C08L39/00
    • C08F283/06C08F2/10
    • The present invention concerns a process for producing dispersions of watsoluble vinyl polymers and a stabilizer for carrying out this process. Such water-soluble, particularly cationic vinyl polymers, are employed on a large scale as process expediters for carrying out, for instance, separating processes in water treatment or waste-water purification, respectively, in the paper, coal and ore industries, in oil production or also in the food stuff industry, among others, for floculation, coagulation, retention or dewatering. According to the present invention, water-soluble vinyl polymers are homo- or copolymerized in the presence of a dispersion stabilizer of the invention. The stabilizer consists of a graft copolymer whose backbone is formed by polyethylene oxide and its grafted branches of cationic vinyl monomers. Among others, cationic, hydrophobically modified vinyl monomers can be advantageously employed. Copolymerizations can be carried out between cationic or non-ionic hydrophobically modified vinyl polymers and cationic or non-ionic, non-hydrophobically modified vinyl polymers.
    • PCT No.PCT / DE97 / 00288 Sec。 371日期:1998年10月5日 102(e)日期1998年10月5日PCT提交1997年2月10日PCT公布。 公开号WO97 / 30094 日期:1997年8月21日本发明涉及一种水溶性乙烯基聚合物的分散体的制造方法及其制造方法。 大量使用这种水溶性,特别是阳离子乙烯基聚合物作为工艺加速器,用于在纸,煤和矿石工业,油中分别进行水处理或废水净化中的分离过程 生产或在食品行业,其中包括絮凝,凝结,保留或脱水。 根据本发明,水溶性乙烯基聚合物在本发明的分散稳定剂的存在下是均聚的或共聚合的。 稳定剂由接枝共聚物组成,其主链由聚环氧乙烷及其接枝的阳离子乙烯基单体分支形成。 其中,可以有利地使用阳离子,疏水改性的乙烯基单体。 可以在阳离子或非离子疏水改性的乙烯基聚合物和阳离子或非离子,非疏水改性的乙烯基聚合物之间进行共聚。