Large sized carbon black particles to reduce needed mixing energy of high hardness, stiff tire compositions
OwnerJamie J. Mcnutt, Nicole L. Squire +1inventors
InventorsJAMIE J. MCNUTT, NICOLE L. SQUIRE, WILLIAM J. O'BRISKIE
Life of this patent
Estimating the term…
Abstract
A reinforced high viscosity rubber composition having improved processability such as reduced mixing cycles contains large sized particles of carbon black. The carbon black has low structure and a low DBP absorption number as well as a low iodine number. The rubber composition is useful in various tire rubber compositions such as those requiring a high viscosity, for example an apex rubber.
Claims17
A reinforced rubber composition, comprising:
- a high viscosity rubber, and large particles of carbon black, said carbon black particles having an iodine number of about 40 or less and a DBP absorption of about 65 or less.
A reinforced tire rubber composition, comprising:
- a rubber and an effective amount of large sized carbon black particles to reduce the Mooney of (ML1+4) viscosity of said rubber composition after blending but before cure.
A process for mixing a high viscosity tire rubber composition comprising the steps of:
- adding large sized carbon black particles to a rubber composition, said carbon black particles having a DBP absorption of from about 20 to about 65 and an iodine number of from about 3 to about 40;
- and
- mixing said large sized carbon black particles and said rubber in a reduced number of mixing stages than with normal sized carbon black to form a rubber composition having a Mooney viscosity ML1+4) of from about 30 to about 80.
Dependencies are inferred from the claim text.