Patent ID: 8580867

Claim:
Vulcanizable rubber mixture which comprises at least one polymer functionalized at least at one chain end (terminally) for binding to fillers, at least one filler and, optionally, additives, wherein the amount of terminally functionalized polymers in the rubber mixture amounts to from 10 to 100 phr and comprises a polymer or a mixture of polymers according to the following particulars: a) said functionalized polymer can be represented by the formula F1-A-F2; or, b) alternatively, said mixture of functionalized polymers is a mixture of a) with an astral or radial coupling product of F1-A-units, coupled by a multivalent coupling agent; wherein F1 represents a terminal functionalization of the polymeric chain, and represents pyrrolidinyl; F2 represents a terminal functionalization different from F1 and wherein F2 is a functional group chosen from the following list, the degree of functionalization, based on the weight of the elastomer(s), being from 30% to 100%: silyl, silanol or siloxane groups inclusive of, in each case attached to the polymer chain with or without a spacer, polysiloxane groups and siloxane and polysiloxane groups comprising amino groups represented by the structures: —SiH 2 (OH), —Si(R 1 ) 2 (OH), —SiH(OH) 2 , —SiR 1 (OH) 2 , —Si(OH) 3 , —(SiR 1 R 2 O) x —R 3 , where x is the number of repetitive units and is from 1 to 500, R 1 and R 2 are identical or different, linear or branched, cycloalkyl, aryl, alkylaryl, aralkyl or vinyl groups, in each case having 1 to 20 carbon atoms, and R 3 is H, as well as siloxane groups that comprise amine groups, represented by the formula -A1-Si-(A2-N((H) k (R 1 ) (2-k) )) y (OR 1 ) z (R 4 ) 3-(y+z) , where: k can vary from 0 to 2, y can vary from 1 to 3, and z can vary from 0 to 2, 0≦y+z≦3, provided that R 1 and R 2 are identical or different, and can be alkyl, linear or branched, cycloalkyl, aryl, alkylaryl, aralkyl or vinyl groups, in each case having 1 to 20 carbon atoms, and mononuclear aryl groups, R 4 is H or alkyl, linear or branched, in each case having 1 to 20 carbon atoms, or a mononuclear aryl group, and A1 and A2 are chains of up to 12 carbon atoms, linear or branched; and A represents the polymeric chain of a polymer formed by the copolymerization between one or more conjugated dienes with one or more aromatic vinyl monomers.