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AssigneeCabot Corporation
InventorsTheis F. Clarke, Thomas E. McElwain, Patricia A. Hubbard, Michael Zhang
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A method of making a particulate carbon product includes: introducing to a reactor a first carbon black forming feedstock and combining the first carbon black-forming feedstock with a stream of hot gases to form a precursor comprising a reaction stream and a particulate comprising at least 98% carbon black; introducing reclaimed carbon particles to the precursor to form a blended stream of the carbon black and the reclaimed carbon particles in the reaction stream; introducing a second feedstock to the blended stream wherein at least a portion of the particulate in the blended stream becomes carbon-coated particles, thereby forming a particulate carbon product comprising the carbon-coated particles; and recovering the particulate carbon product.
A method of making a particulate carbon product comprising:
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A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C as measured by energy dispersive x-ray spectroscopy (EDS) (Si/C (EDS)) and a ratio Si/C as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) satisfy Si/C (XPS)÷Si/C (EDS) of at most 1, and a tensile stress at 300% strain of an elastomer composite comprising 40-60 phr of the particulate carbon product is at least 95% as great as the tensile stress at 300% strain of an elastomer composite prepared in the same manner and with the same formulation but with N330 carbon black substituted for the particulate carbon product.
A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C as measured by energy dispersive x-ray spectroscopy (EDS) (Si/C (EDS)) and a ratio Si/C as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) satisfy Si/C (XPS)÷Si/C (EDS) from 0.1 to 1.
A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) is from 0.2% to 1%.
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A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) is at most 1%, wherein a tensile stress at 300% strain of an elastomer composite comprising 40-60 phr of the particulate carbon product is at least 95% as great as the tensile stress at 300% strain of an elastomer composite prepared in the same manner and with the same formulation but with ASTM N330 carbon black substituted for the particulate carbon product.
A particulate carbon product comprising carbon-coated reclaimed carbon, wherein, in comparison to a vulcanizate containing an equivalent amount of ASTM N330 type carbon black and that is compounded and vulcanized in the same manner, a vulcanizate containing 40-60 phr of the particulate carbon product has a log (base 10) resistivity from 105 to 125% as great and a tensile stress at 300% strain at least 95% as great.
A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a vulcanizate containing 40-60 phr of the particulate carbon product has a log (base 10) resistivity from 55% to 85% as great and a tensile stress at 300% strain that is at least 35% greater than the tensile stress at 300% strain of a vulcanizate prepared in the same manner and with the same formulation but with the uncoated reclaimed carbon substituted for the particulate carbon product.
A particulate carbon product comprising carbon-coated reclaimed carbon, wherein a vulcanizate containing 40-60 phr of the particulate carbon product has a log (base 10) resistivity from 55% to 85% as great and a tensile stress at 300% strain that is at least 35% greater than the tensile stress at 300% strain of a vulcanizate prepared in the same manner and with the same formulation but with a reclaimed carbon that has not been carbon-coated substituted for the particulate carbon product.
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A vulcanized elastomer composite comprising at least one elastomer and 40-60 phr of a particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C of the particulate carbon product as measured by energy dispersive x-ray spectroscopy (EDS) (Si/C (EDS)) and a ratio Si/C as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) satisfy Si/C (XPS)+Si/C (EDS) of at most 1, and a tensile stress at 300% strain of the elastomer composite is at least 95% as great as the tensile stress at 300% strain of a vulcanized elastomer composite prepared in the same manner and with the same formulation but with N330 carbon black substituted for the particulate carbon product.
A vulcanized elastomer composite comprising at least one elastomer and 40-60 phr of a particulate carbon product comprising carbon-coated reclaimed carbon, wherein a ratio Si/C of the particulate carbon product as measured by x-ray photoelectron spectroscopy (XPS) (Si/C (XPS)) is at most 1%, and a tensile stress at 300% strain of the elastomer composite is at least 95% as great as the tensile stress at 300% strain of a vulcanized elastomer composite prepared in the same manner and with the same formulation but with ASTM N330 carbon black substituted for the particulate carbon product.
A vulcanized elastomer composite comprising at least one elastomer and 40-60 phr of a particulate carbon product comprising carbon-coated reclaimed carbon, wherein, in comparison to a vulcanizate containing an equivalent amount of ASTM N330 type carbon black and that is compounded and vulcanized in the same manner, the vulcanized elastomer composite has a log (base 10) resistivity from 105 to 125% as great and a tensile stress at 300% strain at least 95% as great.
A vulcanized elastomer composite comprising at least one elastomer and 40-60 phr of a particulate carbon product comprising carbon-coated reclaimed carbon, wherein the vulcanized elastomer composite has a log (base 10) resistivity from 55% to 85% as great and a tensile stress at 300% strain that is at least 35% greater than the tensile stress at 300% strain of a vulcanized elastomer composite prepared in the same manner and with the same formulation but with the uncoated reclaimed carbon substituted for the particulate carbon product.
A vulcanized elastomer composite comprising at least one elastomer and 40-60 phr of a particulate carbon product comprising carbon-coated reclaimed carbon, wherein the vulcanized elastomer composite has a log (base 10) resistivity from 55% to 85% as great, and a tensile stress at 300% strain that is at least 35% greater than the tensile stress at 300% strain of a vulcanized elastomer composite prepared in the same manner and with the same formulation but with a reclaimed carbon that has not been carbon coated substituted for the particulate carbon product.
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Dependencies are inferred from the claim text.