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1.发明授权Expandable styrene resin beads and suspension-polymerization process for producing the same 失效可发性苯乙烯树脂珠及其制备的悬浮聚合方法
公开(公告)号：US5616413A
公开(公告)日：1997-04-01
申请号：US421244
申请日：1995-04-13
申请人： Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
发明人： Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
CPC分类号： C08J9/18 , C08F12/08 , C08J9/16 , C08J2325/00 , Y10T428/2982
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，其当膨胀至20g / l的堆积密度时，得到预发泡珠粒，其中沿着从珠粒表面到深度为0.2的半径的那些表面部分存在细胞数目 距离表面的mm为3至20 / mm，沿半径范围从胎圈表面到胎圈中心1mm的深度内部存在的细胞数量为每毫米10个或更大， 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。
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公开(公告)号：US5693683A
公开(公告)日：1997-12-02
申请号：US699823
申请日：1996-08-19
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.sup.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，其中存在于从珠粒表面到沿径向方向0.1mm深度的区域中的空隙数不超过每mm 2 100个， 大约是珠的中心。 还公开了通过悬浮聚合制备可发性苯乙烯树脂珠的方法，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中，其中碱 过硫酸的金属盐或铵盐以相对于水性介质为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不需要老化，并且当预扩展时，细胞状态几乎没有变化，即几乎不受储存条件影响的可发性苯乙烯树脂珠。
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3.发明授权Suspension-polymerization process for producing expandable styrene resin beads 失效用于生产可发性苯乙烯树脂珠的悬浮聚合方法
公开(公告)号：US5739221A
公开(公告)日：1998-04-14
申请号：US643010
申请日：1996-05-03
申请人： Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
发明人： Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
CPC分类号： C08J9/18 , C08F12/08 , C08J9/16 , C08J2325/00 , Y10T428/2982
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 to the bead center is 10 or larger per mm, the number of 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，其当膨胀至20g / l的堆积密度时，得到预发泡珠粒，其中沿着从珠粒表面到深度为0.2的半径的那些表面部分存在细胞数目 距离表面的mm为3至20 / mm，并且珠中心为每mm 10mm或更大，沿着半径的内部部分存在的细胞数目，其距离珠粒表面的1mm的深度 珠的中心距离为10mm或更大，沿着所述表面部分存在的细胞数小于沿着所述内部部分存在的细胞的数量。
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