The Goodyear Tire & Rubber Company
Functionalized polymer, rubber composition and pneumatic tire

Abstract:

The present invention is directed to a functionalized elastomer comprising the reaction product of a living anionic elastomeric polymer and a polymerization terminator of formula I ##STR00001## where X is Cl, Br, or I; m is an integer from 0 to 2, n is an integer from 1 to 3, with the proviso that n+m=3; R.sup.1, R.sup.2 are independently C1 to C18 alkyl, aryl, or a combination thereof, or R.sup.1, R.sup.2 are independently --SiR.sub.3 where R is independently alkyl, aryl, alkoxy, or disubstituted amino, or R.sup.1 and R.sup.2 taken together with their common nitrogen atom and optionally a sulfur or oxygen heteroatom to form a five to eight membered ring; R.sup.3 is hydrogen, or C1 to C18 alkyl, aryl, or a combination thereof, or R.sup.3 is --SiR.sub.3 where R is independently alkyl, aryl, alkoxy, or disubstituted amino, or R.sup.3 is --R.sup.6--R.sup.7, where R.sup.6 is C1 to C3 alkanediyl and R.sup.7 is selected from the following structures --S--Z, --N(R.sup.8)(R.sup.9), --O(Y), or Si(OR.sup.10).sub.3, where R.sup.8 and R.sup.9 are independently C1 to C18 alkyl, aryl, or a combination thereof, Y and Z are independently selected from the group consisting of methoxymethyl, tetrahydropyranyl, tetrahydrothiopyranyl, tetrahydrofuranyl, tert-butyl, allyl, 1-ethoxyethyl, benzyl, triphenylmethyl, triethylsilyl, triisopropylsilyl, trimethylsilyl, tert-butyl dimethyl silyl, tert-butyl diphenyl silyl, and isopropyldimethylsilyl, and R.sup.10 are independently C1 to C4 alkyl; or when m=1, the polymerization terminator may have the formula II ##STR00002## where R.sup.4, R.sup.5 are independently C1 to C18 alkyl, aryl, or a combination thereof, or R.sup.4, R.sup.5 are independently --SiR.sub.3 where R is independently alkyl, aryl, alkoxy, or disubstituted amino, X and R.sup.3 are as defined previously, and k is an integer from 0 to 10.