Synthesis of High cis-1,4-BR with Neodymium for the Manufacture of Tires

Table 4

Composition of blends for tires.

Composition/PHR	Blend 1	Blend 2	Blend 3	Blend 4	Blend 5
SBR	34.308	22.300	19.899	22.300	22.300
NdBR 1	0	12.008	14.409	0	0
NdBR 2	0	0	0	12.008	0
NdBR 3	0	0	0	0	12.008
IRB 6	18.28	18.28	18.28	18.28	18.28
Zinc oxide	1.098	1.098	1.098	1.098	1.098
Stearic acid	0.367	0.367	0.367	0.367	0.367
Sulfur	0.638	0.638	0.638	0.638	0.638
TBBS	0.309	0.309	0.309	0.309	0.309
Total/g	55.000	55.000	55.000	55.000	55.000

Except for Blend 3, polybutadienes represent 35% by weight of the total polymer.
In Blend 3 42% was added by weight of polybutadiene to total of the polymer.