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    • 5. 发明授权
    • Method for controlling a polymerization rate of styrene resins
    • 苯乙烯树脂聚合速度控制方法
    • US5665833A
    • 1997-09-09
    • US683197
    • 1996-07-18
    • Hiroto MukaiyamaHayato Kihara
    • Hiroto MukaiyamaHayato Kihara
    • C08F4/32C08F12/08
    • C08F12/08
    • The method for controlling a polymerization rate, in a continuous radical polymerization of mainly styrene monomer using a complete mixing type reactor, without substantially changing an average molecular weight of a polymer formed, comprising the steps of: (a) keeping a polymerization temperature substantially constant at t(.degree.C.), (b) setting a feeding rate of the styrene monomer to A times larger rate than that in a polymerization conducted in the absence of a radical polymerization initiator, and (c) controlling an amount of the radical polymerization initiator added in the range of from (0.1/n).times.10.sup.-3 to (2.0/n).times.10.sup.-3 mol per 1 liter of the monomer, n being a number of radical generating functional groups present in one molecule of the radical polymerization initiator, such that a polymer concentration x satisfy the mathematical expression: x.gtoreq.0.3t+6.multidot.(A-1)+12 and that x be kept substantially constant, wherein A represents a ratio of a polymerization rate after being controlled to a rate of polymerization conducted in the absent of the radical polymerization initiator. The method can easily and as desired control the polymerization rate using any desired radical polymerization initiator.
    • 在主要使用完全混合型反应器的苯乙烯单体的连续自由基聚合中基本上不改变形成的聚合物的平均分子量的方法来控制聚合速率的方法,包括以下步骤:(a)保持聚合温度基本上恒定 在t(℃)下,(b)将苯乙烯单体的进料速率设定为不存在自由基聚合引发剂时所进行的聚合反应的A倍,和(c)控制自由基聚合的量 引发剂以每1升单体为(0.1 / n)×10-3至(2.0 / n)×10-3mol的范围内添加,n为存在于自由基聚合引发剂的一个分子中的自由基产生官能团数 ,使得聚合物浓度x满足数学表达式:x> / = 0.3t + 6x(A-1)+12,并且x保持基本上恒定,其中A表示控制后的聚合速率与 在没有自由基聚合引发剂的情况下进行的聚合速率。 该方法可以容易且按需要使用任何所需的自由基聚合引发剂控制聚合速率。
    • 6. 发明授权
    • Styrenic resin composition and injection- and extrusion-molded articles
    • 苯乙烯树脂组合物和注射和挤出成型制品
    • US5534580A
    • 1996-07-09
    • US334330
    • 1994-11-04
    • Shinichi MitsuiHayato KiharaShuji Yoshimi
    • Shinichi MitsuiHayato KiharaShuji Yoshimi
    • C08K3/00C08L25/02C08L25/04C08K3/32
    • C08K3/0033C08L25/04C08L2205/02C08L25/02
    • Disclosed are a styrenic resin composition comprising (a) a styrenic resin having a weight average molecular weight of 100,000 to 2,000,000 and (b) a finely divided particulate inorganic or organic substance, the inorganic substance having a refractive index of 1.5-2.0 and an average particle diameter of 0.1-20 .mu.m, and the organic substance having a refractive index of 1.5-2.0 and an average particle diameter of 0.1-20 .mu.m and not having a glass transition temperature in a temperature range of 90.degree. C. or below, said particulate inorganic or organic substance accounting for 0.002 to 1 weight % based on the styrenic resin composition, as well as an injection-molded article prepared by molding the styrenic resin composition, and an extrusion-molded article comprising the styrenic resin composition in an amount of at least 50 weight %.
    • 公开了一种苯乙烯树脂组合物,其包含(a)重均分子量为100,000至2,000,000的苯乙烯树脂和(b)细碎的无机或有机物质,所述无机物质的折射率为1.5-2.0,平均 粒径为0.1-20μm,有机物折射率为1.5-2.0,平均粒径为0.1-20μm,玻璃化转变温度在90℃以下的温度范围内 所述颗粒状无机或有机物质相对于苯乙烯类树脂组合物为0.002〜1重量%,以及通过将苯乙烯系树脂组合物成型而制备的注射成型品,以及含有苯乙烯系树脂组合物的挤出成型品 至少50重量%。
    • 8. 发明授权
    • Rubber-modified styrenic resin composition and molded article thereof
    • 橡胶改性苯乙烯树脂组合物及其成型品
    • US06660806B1
    • 2003-12-09
    • US09458959
    • 1999-12-10
    • Shuji YoshimiHayato KiharaTakahiro Ishii
    • Shuji YoshimiHayato KiharaTakahiro Ishii
    • C08F27901
    • C08L51/04C08L23/08C08L83/04C08L2666/04C08L2666/02
    • A rubber-modified styrenic resin composition comprising (A) 100 wt. parts of a rubber-modified styrenic resin which contains 10 to 35 wt. % of soft component particles having an average particle size of 0.1 to 0.5 &mgr;m, where said soft component particles have a single occlusion structure comprising a core part which consists of a single continuous phase of a styrenic resin and a shell part which comprises a rubber polymer and occludes said core part, and (B) 0.1 to 10 wt. parts of a polymer having a solubility parameter (SP) of 8.45 to 8.70 and having no aromatic vinyl compound unit therein. This composition has excellent plane impact strength and gloss properties, as well as moldability and other physical properties, and satisfies properties required for exterior materials, wrapping materials and molded foam articles.
    • 橡胶改性苯乙烯树脂组合物,其包含(A)100重量% 橡胶改性苯乙烯树脂的一部分,其含有10〜35重量% %的平均粒径为0.1〜0.5μm的软组分颗粒,其中所述软组分颗粒具有包含由单一连续相的苯乙烯树脂组成的核心部分和包含橡胶聚合物的壳部分的单一闭塞结构 并封闭所述核心部分,(B)0.1〜10wt。 部分溶解度参数(SP)为8.45〜8.70的聚合物,其中没有芳族乙烯基化合物单元。 该组合物具有优异的平面冲击强度和光泽性能,以及成型性等物理性能,并且满足外部材料,包装材料和模塑泡沫制品所需的性能。
    • 9. 发明授权
    • Process for producing styrene base polymer
    • 制备苯乙烯基聚合物的方法
    • US5783646A
    • 1998-07-21
    • US899641
    • 1997-07-24
    • Hayato KiharaMasayuki Fujita
    • Hayato KiharaMasayuki Fujita
    • C08F2/02C08F2/38C08F12/08C08F2/00
    • C08F2/38C08F12/08
    • A styrene base polymer superior and well-balanced in mechanical strength and fluidity and also superior in heat resistance is industrially advantageously produced by a radical polymerization process comprising; (a) subjecting styrene or a styrene compound and a radical scavenger to thermal polymerization, (1) a concentration of the radical scavenger to styrene or the styrene compound being from 3.0.times.10.sup.-3 to 5.0.times.10.sup.-2 mol %, and (2) a polymerization temperature ranging from 100.degree. C. to 140.degree. C., provided that the concentration of the radical scavenger (C) and the polymerization temperature (T) satisfy the following formula, 100C +0.088T.ltoreq.13.8, and (b) continuing the polymerization to a polymerization conversion of from 40 to 85%.
    • 在机械强度和流动性方面优异且平衡良好且耐热性优异的苯乙烯基聚合物在工业上有利地通过自由基聚合方法制备,所述方法包括: (a)使苯乙烯或苯乙烯化合物和自由基清除剂进行热聚合,(1)自由基清除剂对苯乙烯或苯乙烯化合物的浓度为3.0×10 -3至5.0×10 -2摩尔%,和(2) 聚合温度范围为100℃至140℃,条件是自由基清除剂(C)和聚合温度(T)的浓度满足下式:100℃+0.088T≤13.8,和(b )继续聚合至40至85%的聚合转化率。
    • 10. 发明授权
    • Rubber-modified styrenci resin composition and molded article thereof
    • 橡胶改性苯乙烯树脂组合物及其成型体
    • US6020428A
    • 2000-02-01
    • US656014
    • 1996-05-24
    • Shuji YoshimiHayato KiharaTakahiro Ishii
    • Shuji YoshimiHayato KiharaTakahiro Ishii
    • C08L23/08C08L51/04C08L83/04C08L25/04
    • C08L51/04C08L23/08C08L83/04
    • A rubber-modified styrenic resin composition comprising (A) 100 wt. parts of a rubber-modified styrenic resin which contains 10 to 35 wt. % of soft component particles having an average particle size of 0.1 to 0.5 .mu.m, where said soft component particles have a single occlusion structure comprising a core part which consists of a single continuous phase of a styrenic resin and a shell part which comprises a rubber polymer and occludes said core part, and (B) 0.1 to 10 wt. parts of a polymer having a solubility parameter (SP) of 8.45 to 8.70 and having no aromatic vinyl compound unit therein. This composition has excellent plane impact strength and gloss properties as well as moldability and other physical properties, and satisfies properties required for exterior materials, wrapping materials and molded foam articles.
    • 橡胶改性苯乙烯树脂组合物,其包含(A)100重量% 橡胶改性苯乙烯树脂的一部分,其含有10〜35重量% %的平均粒度为0.1〜0.5μm的软成分颗粒,其中所述软组分颗粒具有单一的闭塞结构,其包括由单一连续相的苯乙烯树脂组成的芯部分和包含橡胶的壳部分 聚合物并封闭所述核心部分,和(B)0.1至10wt。 部分溶解度参数(SP)为8.45〜8.70的聚合物,其中没有芳族乙烯基化合物单元。 该组合物具有优异的平面冲击强度和光泽性以及成型性等物理性能,并且满足外部材料,包装材料和模塑泡沫制品所需的性能。