Dispersible carbonblack pellets
AssigneeCabot Corporation
InventorsJameel Menashi, Robert C. Reid
Life of this patent
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Abstract
The disclosure relates to carbon black pellets containing 10 to less than 48 weight % organic compound, formed by agglomerating a carbon black with an organic compound having specified characteristics. Also disclosed is the use of such pellets as a masterbatch or a concentrate.
Claims19
A carbon black pellet comprising carbon black having a FDBP value less than or equal to 92 cc/100 g carbon as determined at ASTM D 2414 and 10 to less than 48% by weight of an organic compound or a mixture of organic compounds, said pellet having been formed by agglomeration at a temperature above the melting point of the organic compound or mixture of organic compounds in the absence of water, wherein the organic compound or mixture of organic compounds has the following characteristics:
- a) a melting point of at least 25.degree. C.,
- b) when molten and at the agglomeration temperature employed, exhibits less than 5% decomposition or degradation,
- c) when molten and at the agglomeration temperature employed, exhibits a viscosity below 2 Pa.multidot.s at a shear rate of 10 s.sup.-1 and
- d) when molten, wets the carbon black.
A process for preparing a carbon black pellet comprising carbon black having a FDBP value less than or equal to 92 cc/100 g carbon as determined by ASTM D-2414 and 10 to less than 48% by weight of an organic compound or a mixture of organic compounds, comprising agglomerating a carbon black with an organic compound or mixture of organic compounds at a temperature above the melting point of the organic compound or mixture of organic compounds in the absence of water, wherein the organic compound or mixture of organic compounds has the following characteristics:
- a) a melting point of at least 25.degree. C.;
- b) when molten and at the agglomeration temperature employed, exhibits less than 5% decomposition or degradation,
- c) when molten and at the agglomeration temperature employed, exhibits a viscosity below 2 Pa.multidot..s at a shear rate of 10 S.sup.-1 and
- d) when molten, wets the carbon black.
A process for preparing a carbon black pellet comprising carbon black and 10 to less than 48% by weight of an organic compound or a mixture of organic compounds, comprising agglomerating a carbon black with an organic compound or mixture of organic compounds at a temperature above the melting point of the organic compound or mixture of organic compounds in the absence of water, wherein the organic compound or mixture of organic compounds has the following characteristics:
- a) a melting point of at least 25.degree. C.;
- b) when molten and at the agglomeration temperature employed, exhibits less than 5% decomposition or degradation,
- c) when molten and at the agglomeration temperature employed, exhibits a viscosity below 2 Pa.multidot.s at a shear rate of 10 S.sup.-1, and
- wherein the pellet is formed by dry pelletization in a rotating drum.
Dependencies are inferred from the claim text.