Abstract:
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.
Abstract:
PROBLEM TO BE SOLVED: To provide a vulcanized elastomer composite.SOLUTION: A vulcanized wet mix elastomer composite includes at least one carbon black having a CDBP value of at least about 65 mL/100 g, for exampleThe vulcanized wet mix elastomer composite exhibits a ratio of T300 to T100 that is 17% higher than the same ratio for a vulcanized dry mix elastomer composite having the same composition. A vulcanized elastomer composite exhibits a ratio of T300 to T100 of at least 5.5 and includes particulate filler dispersed in elastomer, wherein the particulate filler includes at least about 40 phr of at least one carbon black having an STSA value from 165 to 205 m/g and having a CDBP value from about 85 to 110 mL/100 g. The invention is a wet mix elastomer composite consisting essentially of carbon black dispersed in natural rubber. When the wet mix elastomer composite is processed according to CTV method A, the resulting vulcanized wet mix elastomer composite exhibits a resistivity having a natural logarithm that is at least 10% higher than that for a crosslinked dry mix elastomer composite having the same composition and prepared using CTV comparative method A.
Abstract:
M?langes composites d'?lastom?res comprenant des ?lastom?res non charg?s ou faiblement charg?s r?duisant l'hyst?r?se sans compromettre le renforcement. L'hyst?r?se peut ?galement ?tre r?duite en ajustant le proc?d? de mise en ?uvre.
Abstract:
Sont décrites des charges modifiées qui ont sur celles-ci des groupes chimiques adsorbés et/ou rattachés, tels qu'un triazole et/ou un pyrazole. D'autres charges modifiées sont aussi décrites. Sont en outre décrits des compositions d'élastomère contenant la charge modifiée, ainsi que des procédés pour améliorer l'hystérésis et/ou la résistance à l'abrasion dans des compositions d'élastomère par utilisation des charges modifiées de la présente invention.
Abstract:
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.
Abstract:
A method of producing an elastomer composite. The method includes A) combining a first fluid comprising elastomer latex with a second fluid comprising particulate filter; B) causing the elastomer latex to coagulate, thereby forming masterbatch crumb; C) bringing the masterbatch crumb to a water content about 1 weight percent to about 20 weight percent, thereby forming a dewatered coagulum; D) removing water from the dewatered 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*C to about 190*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.
Abstract:
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.