申请人:THE GOODYEAR TIRE & RUBBER COMPANY
公开号:EP0106779A2
公开(公告)日:1984-04-25
The present invention discloses an aqueous polymerization medium comprising (1) a catalyst composition which contains (a) an organometallic compound and (b) a transition metal compound wherein said catalyst composition is microencapsulated in a polyene product; and (2) water. This invention also discloses an aqueous polymerization medium comprising (1) a catalyst composition which is prepared by dissolving in an inert organic solvent containing at least one polyene (a) a transition metal compound, and (b) an organometallic compound; and (2) water. This aqueous polymerization medium is very useful in the polymerization of unsaturated hydrocarbon monomers. It is of greatest value in the polymerization of conjugated diolefin monomers into stereo-regulated polymers. This invention reveals a very useful process for producing polybutadiene composed essentially of syndiotactic 1,2-polybutadiene in an aqueous medium comprising polymerizing 1,3-butadiene in said aqueous medium in the presence of (1) a catalyst composition microencapsulated in a polyene product which contains (a) at least one cobalt compound selected from the group consisting of (i) ß-diketone complexes of cobalt, (ii) ß-keto acid ester complexes of cobalt, (iii) cobalt salts of organic carboxylic acids having 6 to 15 carbon atoms, and (iv) complexes of halogenated cobalt compounds of the formula CoXn, wherein X represents a halogen atom and n represents 2 or 3, with an organic compound selected from the group consisting of tertiary amine alcohols, tertiary phosphines, ketones and N,N-dialkylamides, and (b) at least one organoaluminum compound of the formula AIR3, wherein R represents a hydrocarbon radical of 1 to 6 carbon atoms; and (2) carbon disulfide.
本发明公开了一种水性聚合介质,其包含(1)催化剂组合物,该催化剂组合物包含(a)有机金属化合物和(b)过渡金属化合物,其中所述催化剂组合物被微囊化在聚烯产品中;以及(2)水。本发明还公开了一种水性聚合介质,该介质包含(1)催化剂组合物,该催化剂组合物是通过将(a)过渡金属化合物和(b)有机金属化合物溶解在含有至少一种聚烯的惰性有机溶剂中制备的;和(2)水。这种水性聚合介质对不饱和烃类单体的聚合非常有用。在将共轭二烯烃单体聚合成立体调节聚合物方面,它的价值最大。本发明揭示了一种非常有用的在水介质中生产主要由对位 1,2-聚丁二烯组成的聚 丁二烯的工艺,该工艺包括在所述水介质中,在以下物质存在的情况下聚合 1,3-丁二烯:(1) 微囊化在聚烯产品中的催化剂组合物,该催化剂组合物含有 (a) 至少一种选自以下组别的钴化合物:(i) β-二酮钴络合物,(ii) β-酮酸钴酯络合物,(iii) 钴盐,(iv) β-二酮钴络合物,(v) β-酮酸钴络合物,(viii) β-酮酸钴络合物、(iii) 具有 6 至 15 个碳原子的有机羧酸的钴盐,以及 (iv) 式 CoXn(其中 X 代表卤素原子,n 代表 2 或 3)的卤代钴化合物与选自由叔胺 醇、叔膦、酮和 N,N-二烷基酰胺组成的有机化合物的络合物;以及 (b) 至少一种式 AIR3(其中 R 代表具有 1 至 6 个碳原子的烃基)的有机铝化合物;(2) 二硫化碳。