Polybutadiene as well as rubber composition using the same...

Details Polybutadiene as well as rubber composition using the same... Polybutadiene as well as rubber composition using the same...

2011-04-05

2011-04-05

Teskin, Fred M (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S160000, C526S335000, C152S450000, C152S905000

Reexamination Certificate

active

07919571

ABSTRACT:
This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I):(1.74550-0.0151-0.04540.4292-0.0129-0.00700.3746)⁢(log10⁡(a/d)log10⁡(a/b)log10⁡(a/c))=(efg)(I)(wherein a is a mountain peak value around 1130 cm−1in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm−1, and c is a valley peak value around 911 cm−1, and d is a valley peak value around 736 cm−1) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)×100≧99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)×100≦0.

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