公开(公告)号：US4340723A

公开(公告)日：1982-07-20

申请号：US218452

申请日：1980-12-19

申请人： Wilhelmus G. Duyzings ,  Jozef L. M. van der Loos ,  Jan Tijssen

发明人： Wilhelmus G. Duyzings ,  Jozef L. M. van der Loos ,  Jan Tijssen

IPC分类号： C08F6/00 ,  C08F6/06 ,  C08F6/22

CPC分类号： C08F6/22

摘要： An improved process for the preparation of copolymers of .alpha.-methylstyrene and other co-monomers such as acrylonitrile styrene, methyl methacrylate and the like, wherein a substantially water-immiscible softener is employed, particularly prior to coagulation of the latex formed of the copolymer, whereby an improved product of higher bulk density and easier to employ in a subsequent processing is obtained.

摘要翻译： 用于制备α-甲基苯乙烯和其它共聚单体如丙烯腈苯乙烯，甲基丙烯酸甲酯等的共聚物的改进方法，其中使用基本上与水不混溶的软化剂，特别是在由共聚物形成的胶乳凝结之前， 从而获得了在随后的处理中更高体积密度和更易于使用的改进的产品。

公开(公告)号：US4404323A

公开(公告)日：1983-09-13

申请号：US276637

申请日：1981-06-23

申请人： Jozef L. M. van der Loos ,  Jan Tijssen

发明人： Jozef L. M. van der Loos ,  Jan Tijssen

IPC分类号： C08L55/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L25/00 ,  C08L25/16 ,  C08L33/00 ,  C08L33/02 ,  C08L51/00 ,  C08L51/02 ,  C08L51/04 ,  C08L55/02 ,  C08L101/00

CPC分类号： C08L25/16 ,  C08L51/04 ,  C08L55/02

摘要： The invention relates to a heat resistant polymer composition based on one or more graft copolymers of styrene and acrylonitrile on a rubber and a copolymer of .alpha.-methylstyrene and acrylonitrile.This composition comprises:A. A graft copolymer obtained by polymerizing 50-80 parts by weight of a monomer mixture consisting of20-40% by weight of acrylonitrile,50-80% by weight of styrene and0-30% by weight of one or more other monomers in the presence of 20-50 parts by weight of rubber (in respect of 100 parts by weight of graft copolymer) andB. a copolymer of .alpha.-methylstyrene and acrylonitrile obtained by polymerizing a mixture of 60-80 parts by weight of .alpha.-methylstyrene and 20-40 parts by weight of acrylonitrile, of which copolymer the spiral flow length (S) is at least 65 and the flow index (V) 45 at most, and the ratio between spiral flow length and the flow index is at least 3.0, and in which polymer composition 35 to 80% by weight of copolymer of .alpha.-methylstyrene and acrylonitrile is present.

摘要翻译： 本发明涉及一种基于一种或多种苯乙烯和丙烯腈在橡胶上的接枝共聚物和α-甲基苯乙烯与丙烯腈的共聚物的耐热聚合物组合物。 该组合物包含：A.通过聚合50-80重量份的由20-40重量％的丙烯腈，50-80重量％的苯乙烯和0-30重量％的丙烯酸酯组成的单体混合物而获得的接枝共聚物 或更多的其它单体，在20-50重量份的橡胶（相对于100重量份的接枝共聚物）的存在下，B是α-甲基苯乙烯和丙烯腈的共聚物，其通过将60-80份的混合物 α-甲基苯乙烯的重量和20-40重量份的丙烯腈，其共聚物的螺旋流动长度（S）至多为65，流动指数（V）为45以下，螺旋流动长度与流量之比 指数为3.0以上，聚合物组合物为α-甲基苯乙烯与丙烯腈共聚物的35〜80重量％。

公开(公告)号：US4536556A

公开(公告)日：1985-08-20

申请号：US548769

申请日：1983-11-04

申请人： Jan Tijssen ,  Jozef L. M. van der Loos

发明人： Jan Tijssen ,  Jozef L. M. van der Loos

IPC分类号： C08F212/12 ,  C08F212/10

CPC分类号： C08F212/12

摘要： An improved process for the preparation of heat resistant copolymers of an alpha-methylstyrene and acrylonitrile by polymerization thereof in aqueous emulsion, and in the presence of a free-radical-supplying compound and a chain-transfer agent. The polymerization reaction is insufficiently cooled to remove all of the released reaction heat, and in combination therewith the polymerization is conducted at a temperature of the aqueous emulsion maintained at a level of at most 110.degree., while further maintaining the mean rate of temperature increase per hour, v, at a value of at most 60.degree. C. per hour, wherein v is determined by the formula: ##EQU1## in which: T.sub.m =maximum temperature of the aqueous emulsion (.degree.C.),T.sub.o =temperature of the aqueous emulsion at the start of the polymerization (.degree.C.)t.sub.m =time in hours at which T.sub.m is reached, andt.sub.o =time in hours at which the polymerization is started whereby the rate of monomer conversion is maximized.

摘要翻译： 一种改进的α-甲基苯乙烯和丙烯腈的耐热共聚物的制备方法，其通过在水乳液中的聚合，以及在自由基供体化合物和链转移剂的存在下进行。 聚合反应不充分冷却以除去所有释放的反应热，并且与此相结合，聚合在水乳液的温度下保持在至多110℃的水平，同时进一步保持每平均温度升高 小时，v至多为60℃/小时，其中v由下式确定：其中：Tm =水乳液的最高温度（℃），To =温度 聚合开始时的水性乳液（℃）tm =达到Tm的时间（小时），以及=以聚合开始的时间（以小时为单位），由此单体转化率最大化。