Cabot Corporation

Vijay R Tirumala

Anand Prakash

Gerald D Adler

Ralph E Dickinson

James A Belmont

Ping Zhang

Martin C Green

Meng-Jiao Wang

Michael D Morris

Ting Wang

Xuan Zhang

Elastomeric compositions are described which have at least one functionalized elastomer and at least one modified filler which has adsorbed and/or attached chemical groups, such as a triazole and/or pyrazole thereon, or other modified fillers which are also described. Methods are further described to improve hysteresis and/or abrasion resistance in elastomeric compositions containing a functionalized elastomer using the modified fillers of the present invention.

Elastomeric composites containing modified fillers and functionalized elastomers

Blends of elastomer composites with unfilled or less highly filled elastomer reduces hysteresis without compromising reinforcement. Hysteresis may also be reduced by adjusting the compounding method.

Elastomer composites, blends and methods for preparing same

A method of producing an elastomer composite. The method includes A) combining a first fluid comprising elastomer latex with a second fluid comprising particulate filler; B) causing the elastomer latex to coagulate, thereby forming masterbatch crumb; C) bringing the masterbatch crumb to a water content of about 1 weight percent to about 20 weight percent, thereby forming a de-watered coagulum; D) removing water from the de-watered coagulum by subjecting the dewatered coagulum to mechanical energy, thereby causing the dewatered coagulum to heat as a result of friction, while allowing the dewatered coagulum to achieve a temperature of about 130&#xb0; C. to about 190&#xb0; C., wherein water content is reduced to about 0.5% to about 3% and wherein substantially all of the decrease in water content is accomplished by evaporation, thereby producing a masticated masterbatch; and E) subjecting the masticated masterbatch to at least an additional 0.3 MJ/kg of mechanical energy while further reducing the water content.

Elastomer composite and method for producing it

Modified fillers are described which have adsorbed and/or attached chemical groups, such as a triazole and/or pyrazole thereon. Other modified fillers are also described. Elastomeric compositions containing the modified filler are further described, as well as methods to improve hysteresis and/or abrasion resistance in elastomeric compositions using the modified fillers of the present invention.

Modified fillers and elastomeric composites comprising same

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Waltham, MA, United States of America

Vijay R Tirumala