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    • 4. 发明授权
    • Process for the preparation of vinylaromatic copolymer redispersion powders redispersible in water
    • 制备可再分散于水中的乙烯基芳族共聚物再分散粉末的方法
    • US06348532B1
    • 2002-02-19
    • US09592997
    • 2000-06-12
    • Theo Mayer
    • Theo Mayer
    • C08K509
    • C08F212/04
    • A process for the preparation of vinylaromatic copolymer redispersion powders redispersible in water is by free-radical emulsion polymerization of a comonomer mixture including (a) one or more vinylaromatic comonomers, (b) one or more 1,3-diene comonomers (b1) or one or more comonomers (b2) from the group including the alkyl esters having 1 to 8 C atoms of acrylic acid or methacrylic acid and (c) 0.1 to 10% by weight, based on the total weight of the comonomer mixture, of one or more comonomers from the group including the ethylenically unsaturated mono- or dicarboxylic acids or the anhydrides thereof, the ethylenically unsaturated carboxamides, the ethylenically unsaturated sulfonic acid compounds and in each case the salts thereof, and drying of the aqueous copolymer dispersion obtainable thereby. One or more hydroxycarboxylic acids or the salts thereof are added to the aqueous copolymer dispersion in an amount of 3 to 40% by weight, based on the total weight of copolymer, before or during the polymerization or before the drying.
    • 制备可再分散在水中的乙烯基芳族共聚物再分散粉末的方法是通过共聚单体混合物的自由基乳液聚合,包括(a)一种或多种乙烯基芳族共聚单体,(b)一种或多种1,3-二烯共聚单体(b1)或 一个或多个共聚单体(b2),其包括具有丙烯酸或甲基丙烯酸的1-8个碳原子的烷基酯和(c)基于共聚单体混合物总重量的0.1-10重量%的一种或多种共聚单体 包括烯键式不饱和单羧酸或二羧酸或其酸酐,烯键式不饱和羧酰​​胺,烯键式不饱和磺酸化合物和各种情况下其盐的更多共聚单体,以及由此得到的含水共聚物分散体的干燥。 在聚合前或聚合前或干燥前,将一种或多种羟基羧酸或其盐以基于共聚物总重量计为3〜40重量%的量加入含水共聚物分散体中。
    • 10. 发明授权
    • Vinylaromatic/1,3-diene copolymer stabilized with protective colloids as adhesives for porous substrates
    • 用保护胶体稳定的乙烯基芳烃/ 1,3-二烯共聚物作为多孔基材的粘合剂
    • US06656983B1
    • 2003-12-02
    • US09856538
    • 2001-08-01
    • Theo MayerThomas KohlerReinhard HarzschelHans-Peter WeitzelBernd Schilling
    • Theo MayerThomas KohlerReinhard HarzschelHans-Peter WeitzelBernd Schilling
    • C08L100
    • C09J125/10C08F236/10C08L2666/02C09J109/06
    • The invention provides mixed aromatic vinyl-1,3-diene polymers stabilized by a protective colloid and present in the form of aqueous polymer dispersions or polymer powders redispersible in water as adhesives for porous substrates. The polymer dispersions and the polymer powders are obtained by emulsion polymerization of a mixture containing: a) 20 to 80 percent by weight of one or more vinylaromatics; b) 19.9 to 79.9 percent by weight of one or more 1,3-dienes; c) 0.1 to 15 percent by weight of one or more comonomers from the group consisting of N-methylolacrylamide, N-methylolmethacrylamide and the N-(alkoxymethyl)-acrylamides and N-(alkoxymethyl)-methacrylamides with a C1 to C6-alkyl radical. The sum of the above percentages adds up to 100% by weight. Emulsion polymerization is carried out in the presence of one or more protective colloids and without emulsifiers, optionally followed by drying of the resulting aqueous polymer dispersion.
    • 本发明提供了由保护胶体稳定并以聚合物水分散体形式存在的混合芳族乙烯基-1,3-二烯聚合物或可再分散在水中的聚合物粉末作为多孔基材的粘合剂。 聚合物分散体和聚合物粉末通过混合物的乳液聚合获得,所述混合物包含:a)20至80重量%的一种或多种乙烯基芳烃; b)19.9至79.9重量%的一种或多种1,3-二烯; c)0.1至15重量%的来自由N-羟甲基丙烯酰胺,N-羟甲基甲基丙烯酰胺和N-(烷氧基甲基) - 丙烯酰胺和具有C 1至C 6 - 烷基的N-(烷氧基甲基) - 甲基丙烯酰胺组成的组中的一种或多种共聚单体 。 上述百分比的总和高达100重量%。 乳液聚合在一种或多种保护胶体和不含乳化剂的存在下进行,任选然后干燥所得的聚合物水分散体。