公开(公告)号：US5272214A

公开(公告)日：1993-12-21

申请号：US663793

申请日：1991-03-04

申请人： Sergio Custro ,  Elio Diani ,  Alessandro Zazzetta

发明人： Sergio Custro ,  Elio Diani ,  Alessandro Zazzetta

IPC分类号： C08F297/04 ,  C08G81/02 ,  C08L95/00 ,  C08L53/02

CPC分类号： C08G81/022 ,  C08F297/044 ,  C08L95/00

摘要： Radial and branched block copolymers show a structure: ##STR1## wherein: Z is a radical deriving from a tetrafunctional coupling agent;A is a polystyrene block;B is a polybutadiene blockm, n, p, q are either 1 or zero, with the condition that their sum is comprised within the range of from 1 to 4.Compositions of block copolymers comprise the hereinabove disclosed radial and branched block copolymers, blended with a two-block copolymer B-A, and an "A" homopolymer.The process for the preparation of said radial and branched block copolymers and of the related compositions is disclosed, and furthermore their use is disclosed in bituminous compositions, in order to improve the general characteristics of the bitumens.

摘要翻译： 径向和支化嵌段共聚物显示以下结构：其中：Z是衍生自四官能偶联剂的基团; A是聚苯乙烯块; B是聚丁二烯嵌段m，n，p，q是1或0，条件是它们的总和在1至4的范围内。嵌段共聚物的组合物包括上述公开的径向和支链嵌段共聚物，共混 与两嵌段共聚物BA和“A”均聚物。 公开了制备所述径向和支链嵌段共聚物和相关组合物的方法，此外，其用途在沥青组合物中公开，以改善沥青的一般特性。