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    • 4. 发明授权
    • Suspending agent-containing slurry for suspension polymerization
    • 用于悬浮聚合的含悬浮剂的浆料
    • US5889285A
    • 1999-03-30
    • US609614
    • 1996-03-01
    • Mitsushi MurataTsunenori TakahashiYukio Kato
    • Mitsushi MurataTsunenori TakahashiYukio Kato
    • C08F2/20B01F17/00C08F2/18
    • B01F17/005B01F17/0007B01F17/0028B01F17/0042B01F17/0057B01F17/0064B01F17/0085C08F2/18
    • A suspending agent-containing slurry is disclosed which comprises a dispersant and a particulate suspending agent having a particle size distribution in which the particle diameter at weight-cumulative 95%, from the minimum particle size, is 1 .mu.m or smaller. A method for efficiently producing the suspending agent-containing slurry is also disclosed. A process for suspension polymerization by use of the suspending agent-containing slurry is further disclosed. The slurry not only has such an excellent suspending ability in suspension polymerization that it enables the production of vinyl polymer beads having a narrow bead size distribution, but also is capable of retaining this ability over long and of exhibiting the same ability even when it has a high concentration. The suspension polymerization process enables vinyl polymer beads having a narrow bead size distribution to be produced efficiently due to the use of the slurry.
    • 公开了一种含悬浮剂的浆料,其包含分散剂和粒度分布的颗粒状悬浮剂,其中粒径从最小颗粒尺寸的重量累积95%为1μm或更小。 还公开了一种有效生产含悬浮剂的浆料的方法。 进一步公开了通过使用含悬浮剂的浆料进行悬浮聚合的方法。 该浆料不仅在悬浮聚合中具有优异的悬浮能力,能够制造具有窄珠粒度分布的乙烯基聚合物珠粒,而且能够长时间保持该能力,并且即使具有相同的能力也能表现出相同的能力 高浓度 悬浮聚合方法使得能够由于使用浆料而有效地制备具有窄珠粒度分布的乙烯基聚合物珠粒。
    • 7. 发明授权
    • Expandable ABS resin beads and process for producing the same
    • 可膨胀的ABS树脂珠及其制造方法
    • US5837740A
    • 1998-11-17
    • US531603
    • 1995-09-21
    • Kenji HaraguchiTakanori SuzukiYoshinari Itoh
    • Kenji HaraguchiTakanori SuzukiYoshinari Itoh
    • C08J9/18
    • C08J9/18C08J2355/02Y10T428/249989Y10T428/2998
    • Expandable ABS resin beads containing a volatile blowing agent are disclosed which have an internal-water content of 5% by weight or lower and, when expanded in an expansion ratio of 30, give expanded beads each having a non-expanded surface layer having a thickness of not more than 50 .mu.m. A process for producing the expandable ABS resin beads is also disclosed which comprises dispersing ABS resin beads into an aqueous medium in a closed vessel and impregnating a volatile blowing agent into the ABS resin beads, said aqueous medium containing an electrolyte at least during the impregnation of the volatile blowing agent, with the concentration of the electrolyte in the aqueous medium being from 0.01 to 2 mol/l. The expandable resin beads are capable of giving an expanded molded article excellent in chemical resistance and toughness and especially in surface appearance and heat resistance.
    • 公开了含有挥发性发泡剂的可发性ABS树脂珠,其内含水量为5重量%以下,当以30的发泡倍率膨胀时,得到各自具有非发泡表面层的发泡珠,其厚度为 不超过50亩。 还公开了一种用于生产可膨胀ABS树脂珠粒的方法,其包括将ABS树脂珠粒分散在密闭容器中的水性介质中,并将挥发性发泡剂浸渍到ABS树脂珠粒中,所述水性介质至少在浸渍期间含有电解质 挥发性发泡剂,水介质中电解质的浓度为0.01〜2mol / l。 可膨胀树脂珠能够赋予耐化学性和韧性优异,特别是表面外观和耐热性优异的发泡成型体。
    • 8. 发明授权
    • Expandable styrene resin beads and process for producing the same
    • 可发性苯乙烯树脂珠及其制造方法
    • US5693683A
    • 1997-12-02
    • US699823
    • 1996-08-19
    • Hiroki ShinozakiMasayuki TanakaYonezo UedaTakanori Suzuki
    • Hiroki ShinozakiMasayuki TanakaYonezo UedaTakanori Suzuki
    • C08F2/18C08F12/00C08J9/00C08J9/20
    • C08J9/0061C08J9/20C08J2325/00C08J2433/00
    • 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.
    • 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。