摘要:
Anionic polymerization process for preparing impact-modified polystyrene, by 1) preparing a rubber solution from diene monomers or from diene monomers and styrene monomers by anionic solution polymerization, using an organyllithium compound, 2) adding sufficient organylaluminum compound to give an Al/Li molar ratio >1 (or in the case of dialkylaluminum phenolates >0.5), 3) adding styrene monomer, and 4) adding sufficient organyllithium compound, or organyllithium compound and organylaluminum compound, to make the Al/Li molar ratio
摘要:
The present invention relates to mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S1-B1-S2 and (II) S3-B2-S4, where S1 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 40,000 to 100,000 g/mol, each of S2, S3 and S4 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 5,000 to 20,000 g/mol, each of B1 and B2 is a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with numberaverage molar mass Mn in the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.
摘要翻译:本发明涉及包含由乙烯基芳族单体和结构式(I)的二烯制备的线性嵌段共聚物的混合物,其中R 1,R 2,R 2, 和(II)S 3 -S 2 -S S 4,其中S 1是一个制成的块 来自具有40,000至100,000g / mol的数均分子量M N n N的乙烯基芳族单体,S 2,S 3, 和S 4是由数均分子量M 2 N 2以上的乙烯基芳族单体制成的嵌段,其数量为5,000〜20,000g / mol,B 1 和B 2是由二烯制成的嵌段或由二烯制成的共聚物嵌段和数均分子量M N n N的乙烯基芳族单体在15,000至 40,000g / mol,嵌段共聚物(I)/(II)的比例在0.6〜2的范围内。
摘要:
The invention relates to anionically polymerized impact polystyrene which is characterized in that it has a melt volume flow rate MVR of at least 8 cm3/10 min which is measured in accordance with EN ISO 1133 at a test temperature of 200°C. and with a nominal load of 5 kg.
摘要翻译:本发明涉及阴离子聚合的抗冲聚苯乙烯,其特征在于其具有至少8cm 3 / 10min的熔体体积流量MVR,其在试验温度下根据EN ISO 1133测量 为200°C。 标称负荷为5公斤。
摘要:
In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl, at least one magnesium organyl and at least one aluminum organyl. The invention also provides an initiator composition for carrying out the process.
摘要:
Disclosed are a process for the preparation of an initiator composition comprising an alkali metal organyl and an aluminum organyl and a process for the polymerization of anionically polymerizable monomers.