A process for preparation of coupled, block-free polymerisates based on conjugated dienes useful in the preparation of damping materials, e,g, tires and tire components, e.g. tire treads or side walls

摘要

A process for preparation of coupled, block-free polymerisates based on conjugated dienes or copolymerisates based on conjugated dienes and vinyl aromatic compounds by anionic polymerization in an inert organic medium with an Li compound as initiator, using an alcoholate as microstructure regulator and randomizer is new. A process for preparation of coupled, block-free polymerisates based on conjugated dienes or copolymerisates based on conjugated diens and vinyl aromatic compounds by anionic polymerization in an inert organic medium with an Li compound as initiator, using an alcoholate as microstructure regulator and randomizer, where the alcoholate has the formula M1-O-R: or R-O-M2-O-R: M1 = K or Na, M2 = Ca or Mg, R = alkyl, aryl, aralkyl or a hydrocarbon containing oxygen or nitrogen, and the alcoholate is selected from about 13 compounds, e.g. ethylene glycol butyl ether, N,N-dimethylethanolamine, 2-(2-dimethylaminoethyl)-methylaminoethanol, tetrahydrofurfuryl alcohol, 2-hydroxymethyl-1,3-dioxolane, N-(2-hydroxyethyl)-morpholine. An Independent claim is included for a polymerisate obtained as above.