Patent ID: 9133281
Filing Date: 2015-09-15
Classification: B60C,C08C,C08K,C08L

Abstract:
1. A method of preparing a rubber composition comprises: (A) providing a blend comprised of, based on parts by weight per 100 parts by weight rubber (phr): (B) functionalizing at least one of said diene-based elastomers containing said oxidative derived components with a functionalizing compound having a moiety capable of reacting with at least one of said oxidative derived components on said elastomer chain and another different moiety capable of reacting with hydroxyl groups on said precipitated silica by: wherein said functionalizing of said oxidative component containing elastomer(s) is conducted in the absence of compound(s) competing with said functionalization comprised of: (C) Followed by blending with said rubber composition containing said functionalized elastomer(s) at least one compound containing at least one of primary and secondary amine groups; wherein said functionalizing compound for functionalizing said diene-based elastomer is an organoaminoalkoxysilane comprised of the general structural formula (II): wherein R 1 , R 2 and R 3 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms, with the proviso that at least one of R 1 , R 2 and R 3 is an ethoxy radical; R 4 is an alkylene group which contains from 1 through 8 carbon atoms; and R 5 is selected from the group consisting of hydrogen and alkyl groups having from 1 to 15 carbon atoms.