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    • 2. 发明授权
    • Method of manufacturing rubber modified styrene resins
    • 制备橡胶改性苯乙烯树脂的方法
    • US4378452A
    • 1983-03-29
    • US269011
    • 1981-07-01
    • Mune IwamotoNorifumi ItoYuzuru IshidaTetsuyuki Matsubara
    • Mune IwamotoNorifumi ItoYuzuru IshidaTetsuyuki Matsubara
    • C08F2/00C08F2/02C08F2/04C08F279/00C08F279/02
    • C08F279/02
    • A method of manufacturing rubber modified styrene resins comprising the 1st step of polymerizing a styrene monomer in the presence of a butadiene polymer and an organic peroxide at the ratio of 100 parts by weight, 3 to 15 parts by weight and 0 to 0.01 parts by weight respectively until the polymerization yield of the styrene monomer becomes 2 to 5 time more than the weight of the butadiene polymer, and the 2nd step of polymerizing the full amount of polymer mixture from the 1st step and 0 to 200 parts by weight of the fresh styrene monomer in the presence of 0.01 to 0.9 parts by weight of the organic peroxide until the polymerization yield of the styrene monomer becomes at least 1.5 times more than that of the 1st step. The molded product of the resin thus obtained shows an improved impact strength at the portions wherein polystyrene molecule orientation tends to occur.
    • PCT No.PCT / JP80 / 00270 Sec。 371日期1981年7月1日 102(e)日期1981年5月27日PCT提交1980年10月30日PCT公布。 出版物WO81 / 01291 日本公开1981年5月14日。一种制造橡胶改性苯乙烯树脂的方法,包括在100重量份比例为3〜15重量份的丁二烯聚合物和有机过氧化物存在下,使苯乙烯单体聚合的第1工序, 0至0.01重量份,直到苯乙烯单体的聚合产率比丁二烯聚合物的重量高2至5倍,第2步将聚合物混合物从第1步和0至200份聚合 的新鲜苯乙烯单体,在0.01至0.9重量份的有机过氧化物存在下,直到苯乙烯单体的聚合产率变得比第一步的至少1.5倍。 由此获得的树脂的模塑制品在聚苯乙烯分子取向倾向于发生的部分显示改善的冲击强度。
    • 8. 发明授权
    • Anionically-polymerized-rubber-modified styrene copolymers
    • 阴离子聚合橡胶改性苯乙烯共聚物
    • US4972024A
    • 1990-11-20
    • US224329
    • 1988-07-26
    • Mune IwamotoNorifumi ItoKazuo SugazakiTetsuyuki MatsubaraToshihiko AndoYasuo Furuta
    • Mune IwamotoNorifumi ItoKazuo SugazakiTetsuyuki MatsubaraToshihiko AndoYasuo Furuta
    • C08F279/04C08F287/00C08F297/04
    • C08F287/00C08F279/04C08F297/04
    • Disclosed herein is a rubber-modified styrene copolymer which contains as an impact strength modifier a rubbery polymer having a viscosity of 2-250 centipoises as measured at 25.degree. C. as a 5 wt. % styrene solution and a styrene insoluble content lower than 0.1 wt. %, produced by anionic polymerization and dispersed in a continuous phase of a styrene-acrylonitrile copolymer. The rubbery polymer contains small particles of the same styrene-acrylonitrile copolymer occluded in the form of cells. The areas of particles in each of which the maximum cell diameter is smaller than 0.1 .mu.m are at least 40% of the area of all the particles of the rubbery polymer and the volume average particle size of these particles is 0.1-0.4 .mu.m. The weight ratio of the monomers in the styrene-acrylonitrile copolymer is 90/10.gtoreq.styrene/acrylonitrile.gtoreq.55/45. Per 100 parts by weight of the copolymer, the proportions of polymers having a molecular weight greater than 1,000,000 is smaller than 0.5 part by weight while the proportion of polymers having a molecular weight greater than 1,200,000 is smaller than 0.01 part by weight.
    • 本文公开了一种橡胶改性苯乙烯共聚物,其包含作为冲击强度改性剂的橡胶状聚合物,其粘度为2550厘泊,在25℃下测量为5重量% %苯乙烯溶液和低于0.1重量%的苯乙烯不溶物含量。 %,通过阴离子聚合制备并分散在苯乙烯 - 丙烯腈共聚物的连续相中。 橡胶状聚合物含有以细胞形式封闭的相同苯乙烯 - 丙烯腈共聚物的小颗粒。 最大电池直径小于0.1μm的颗粒面积至少为橡胶状聚合物颗粒面积的40%,这些颗粒的体积平均粒径为0.1-0.4μm。 苯乙烯 - 丙烯腈共聚物中单体的重量比为90/10> / =苯乙烯/丙烯腈> / = 55/45。 每100重量份共聚物,分子量大于1,000,000的聚合物的比例小于0.5重量份,而分子量大于1,200,000的聚合物的比例小于0.01重量份。