Patent ID: 6841648

Claim:
Polymers which are modified by functional end groups and are based on conjugated dienes or on conjugated dienes and vinylaromtic compounds, and have an average molecular weight (Mw) of greater than 10,000 g/mol, a molecular weight distribution (Mn/Mw) of 1.3 to 5 and have functional end groups which are derived from compounds of the formula (I) wherein R 1 and R 2 are identical or different and represent hydrogen, or represent linear or branched alkyl groups having 1 to 15 carbon atoms, or represent aryl groups having 6 to 10 carbon atoms, or represent cycloalkyl groups having 5 to 10 carbon atoms, or represent aralkyl groups having 1 to 4 carbon atoms in the alkyl part and 6 to 10 carbon atoms in the aryl part, or wherein R 1 and R 2 , together with the nitrogen atom, form a heterocyclic ring which contains 2 to 10 carbon atoms, and in addition can also be interrupted by 1 to 3 heteroatoms of the third to seventh main group of the periodic table of the elements, such as nitrogen, oxygen or sulfur, or from compounds of the formula (II) wherein R 3 to R 7 are identical or different and represent hydrogen, linear or branched alkyl groups having 1 to 15 carbon atoms, aryl groups having 6 to 10 carbon atoms, cycloalkyl groups having 5 to 10 carbon atoms or aralkyl groups having 1 to 4 carbon atoms in the alkyl part and 6 to 10 carbon atoms in the aryl part, or wherein R 3 to R 7 represent the radical and n, m, o, p independently of one another represent the numbers 1 to 12, the content of functional end groups being 40 to 100 mol %, based on the total number of polymer chains present.