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    • 7. 发明公开
    • POLYCHLOROPRENE LATEX, POLYCHLOROPRENE LATEX COMPOSITION, AND MOLDED ARTICLE
    • 聚氯丁烯胶乳,聚氯丁烯胶乳组合物和成型制品
    • EP2824121A1
    • 2015-01-14
    • EP13755519.9
    • 2013-03-01
    • Denki Kagaku Kogyo Kabushiki Kaisha
    • OTSUKA HidehitoSUNADA KiyoshiMOCHIZUKI KenjiSHIRAIWA Toru
    • C08F36/18C08L11/02
    • C08F236/18C08C1/15C08F36/18C08F136/18C08L11/02C08F2/26
    • An object of the present invention is to provide a polychloroprene latex with improved rubber coagulability that gives a film superior in strength by dip molding, a polychloroprene latex composition, and a molded article.
      The polychloroprene latex is prepared by polymerization of 2-chloro-1,3-butadiene alone or by polymerization of raw monomers at least containing 2-chloro-1,3-butadiene and 2,3-dichloro1,3-butadiene and has a precipitation rate of 5 to 40%, as calculated according to Equation (I). In Equation (I), A is the mass (g) of the dry product, which is obtained by adding 50 ml of saturated aqueous solution of calcium hydroxide at 23°C to 50 g of a latex having a solid matter concentration adjusted to 45 to 65 mass % at a liquid temperature of 23°C over 2 minutes, filtering and collecting the generated precipitate with a 80-mesh wire mesh, and drying the precipitate at 110°C for 3 hours; B is the mass of the latex before the dropwise addition (50 g); and C is the solid matter concentration (mass %) of the latex before the dropwise addition. Precipitation rate % = A B × C 100 × 100
    • 本发明的目的在于提供一种通过浸渍成型而得到强度优异的膜的橡胶凝固性提高的聚氯丁二烯胶乳,聚氯丁二烯胶乳组合物以及成型品。 聚氯丁二烯胶乳通过单独聚合2-氯-1,3-丁二烯或通过聚合至少含有2-氯-1,3-丁二烯和2,3-二氯-1,3-丁二烯的原料单体并具有沉淀 按照等式(I)计算的5至40%的比率。 在式(I)中,A是干产物的质量(g),其通过将50ml的氢氧化钙的饱和水溶液在23℃下加入到50g固体物质浓度调节至45 在23℃的液温下用2分钟滴加至65质量%,用80目的金属丝网过滤收集生成的沉淀物,在110℃下干燥3小时后, B是滴加前的胶乳质量(50g); C是滴加前的胶乳的固体成分浓度(质量%)。 沉淀率(%)= AB×C100×100