Preparation method of copolymer

Details Preparation method of copolymer Preparation method of copolymer

2007-07-24

2007-07-24

Rabago, Roberto (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S342000, C525S359300, C525S375000, C525S379000, C526S340000

Reexamination Certificate

active

10940264

ABSTRACT:
The present invention provides a method for preparing a copolymer useful for the manufacture of tires by coupling the ends of a living polymer obtained from copolymerization of a diene monomer and a vinyl aromatic monomer in the presence of an organolithium catalyst and a hydrocarbon solvent with a multi-reactive polysiloxane compound and then modifying the remaining uncoupled ends of the polymer with an amine compound. The use of the copolymer thus obtained for the fabrication of tires improves the affinity to silica as well as carbon black used as a reinforcing material and provides enhanced properties required for tires, such as increased wet traction, reduced rolling resistance, and increased tread wear.

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Quirk et al., Carbonation of Polymeric Organolithium Compounds: Effects of Chain End Structure, Journal of Polymer Science: Part A: Polymer Chemistry, vol. 30, pp. 2349-2355, 1992.

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