| 摘要 |
1301726 1,3-Diolefin-vinylaromatic compound block copolymerization FARBENFABRIKEN BAYER AG 30 July 1970 [2 Aug 1969] 36833/70 Addition to 1218147 Heading C3P Block copolymers are obtained by continuously feeding a separately prepared mixture of 1,3-diolefin, vinyl aromatic compound and a polymer of 1,3-diolefin containing catalyst (organolithium) residues to a self-cleaning twinshaft or multiple-shaft screw extruder. In examples, butadiene and styrene are copolymerized in the presence of n-butyl lithium, and the reaction terminated with stearic acid/2,6-dit-butylparacresol. |
