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1. 发明公开

EP0761729A1 Expandable styrene resin beads and process for producing the same 失效
标题翻译： AufschäumbareStyrolharzpartikel und Verfahren zu ihrer Herstellung
公开(公告)号：EP0761729A1
公开(公告)日：1997-03-12
申请号：EP96114148.8
申请日：1996-09-04
申请人： Mitsubishi Chemical BASF Company Limited
发明人： Shinozaki, Hiroki , Tanaka, Masayuki , Ueda, Yonezo , Suzuki, Takanori
IPC分类号： C08J9/20
CPC分类号： C08J9/0061 , C08J9/20 , C08J2325/00 , C08J2433/00
摘要： An expandable styrene resin bead containing voids therein, wherein the number of the voids present in the area from the surface of the bead to a depth of 0.1 mm along the radial direction is not more than 100 per mm 2 as counted on a cross section passing through approximately the center of the bead. A process for producing expandable styrene resin beads by suspension polymerization is also disclosed in which a styrene monomer is suspended in an aqueous medium in the presence of an initiator and a suspending agent, and a blowing agent is incorporated into polymer beads produced, wherein an alkali metal salt or ammonium salt of persulfuric acid is added to the reaction system in an amount of 0.5 to 30 ppm based on the aqueous medium while the degree of conversion of said monomer is in the range of from 0 to 30%, and an electrolyte is added to the reaction system in a concentration of 0.02 to 5.0 mol/l based on the aqueous medium when the degree of conversion is 30% or higher. The expandable styrene resin bead does not require aging and, when pre-expanded, show little variation in the state of the cells, i.e., expandable styrene resin beads which hardly undergo influences of storage conditions.
摘要翻译：在其中含有空隙的可膨胀苯乙烯树脂珠粒，其中存在于从珠粒表面到沿径向方向的0.1mm深度的区域中的空隙的数量不大于每十二进制100个/ mm 2 穿过珠的中心的部分。还公开了通过悬浮聚合制备可发性苯乙烯树脂珠粒的方法，其中在引发剂和悬浮剂存在下将苯乙烯单体悬浮在水性介质中，并将发泡剂引入所制备的聚合物珠粒中，其中碱相对于水性介质，过硫酸的金属盐或铵盐以0.5〜30ppm的量添加到反应体系中，而所述单体的转化率为0〜30％，电解质为当转化率为30％以上时，基于水性介质，以0.02〜5.0mol / l的浓度添加到反应体系中。可发性苯乙烯树脂珠粒不需要老化，并且当预扩展时，细胞状态几乎不发生变化，即几乎不受储存条件影响的可发性苯乙烯树脂珠粒。

2. 发明公开

EP0683198A1 Expandable styrene resin beads and suspension-polymerization process for producing the same 失效
标题翻译： AufschäumbareStyrolharzpartikel und Suspensionspolymerisationsverfahren zu ihrer Herstellung。
公开(公告)号：EP0683198A1
公开(公告)日：1995-11-22
申请号：EP95106171.2
申请日：1995-04-25
申请人： Mitsubishi Chemical BASF Company Limited
发明人： Shinozaki, Hiroki , Tanaka, Masayuki , Ueda, Yonezo
IPC分类号： C08J9/18 , C08J9/16 , C08F2/18
CPC分类号： C08J9/18 , C08F12/08 , C08J9/16 , C08J2325/00 , Y10T428/2982 , C08F2/18
摘要： Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/ℓ, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.
摘要翻译：描述了可膨胀的苯乙烯树脂珠粒，当其膨胀至20g / l的堆积密度时，得到预发泡的珠粒，其中沿着从珠粒表面到深度为0.2的半径表面部分存在的细胞数目距离表面的mm为3至20 / mm，并且沿距离胎圈表面至珠珠中心1mm的深度的半径的内部部分存在的细胞数量为10或更大，沿着所述表面部分存在的细胞小于沿着所述内部部分存在的细胞的数量。

3. 发明授权

EP0761729B1 Expandable styrene resin beads and process for producing the same 失效
标题翻译：它们的制备可发泡性苯乙烯树脂颗粒和过程
公开(公告)号：EP0761729B1
公开(公告)日：2000-08-16
申请号：EP96114148.8
申请日：1996-09-04
申请人： Mitsubishi Chemical BASF Company Limited
发明人： Shinozaki, Hiroki , Tanaka, Masayuki , Ueda, Yonezo , Suzuki, Takanori
IPC分类号： C08J9/20
CPC分类号： C08J9/0061 , C08J9/20 , C08J2325/00 , C08J2433/00

4. 发明授权

EP0683198B1 Suspension polymerization process for producing expandable styrene resin beads 失效
标题翻译：对于发泡性苯乙烯系树脂粒子的制备悬浮聚合方法
公开(公告)号：EP0683198B1
公开(公告)日：2000-07-12
申请号：EP95106171.2
申请日：1995-04-25
申请人： Mitsubishi Chemical BASF Company Limited
发明人： Shinozaki, Hiroki , Tanaka, Masayuki , Ueda, Yonezo
IPC分类号： C08J9/18 , C08J9/16 , C08F2/18
CPC分类号： C08J9/18 , C08F12/08 , C08J9/16 , C08J2325/00 , Y10T428/2982 , C08F2/18

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