Cabot Corporation

About: Cabot Corporation is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Carbon black & Carbon. The organization has 1279 authors who have published 1399 publications receiving 36736 citations.

Methods of making a particle having an attached stable free radical

Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: wherein Ar represents an aromatic group; R 1 represents a bond, an arylene group, an alkylene group, wherein R 4 is an alkyl or alkylene group or an aryl or arylene group; R 2 and R 3 , which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR 5 , —NHR 5 , —NR 5 R 5 , or —SR 5 , wherein R 5 , which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical. Also disclosed is a modified particle or aggregate having attached a group having the formula: wherein CoupA represents a Si-containing group, a Ti-containing group, or a Zr-containing group; R 8 and R 9 , which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR 10 , —NHR 10 , —NR 10 R 10 , or —SR 10 , wherein R 10 represents an alkyl group or an aryl group; SFR represents a stable free radical; and n is an integer of from 1 to 3. A modified particle having an attached —SFR or —X—SFR is additionally disclosed. Also, modified particles with attached polymers are also disclosed as well as methods of making the modified particles.

Dispersions comprising modified pigments

Abstract: The present invention describes a dispersion comprising a vehicle and a modified pigment. The modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between 5.0 and 11.0 Inkjet ink compositions and an inkjet consumable set are also disclosed.

Modified colored pigments and ink jet inks containing them

Abstract: A modified colored pigment is described which comprises colored pigment having attached at least one organic group. The organic group comprises a) at least one aromatic group or a C1-C12 alkyl group and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group. The aromatic group or the C1-C12 alkyl group of the organic group is directly attached to the pigment and the organic group is present at a treatment level of from about 0.10 to about 4.0 micromoles/m2 of the carbon used based on nitrogen surface area of thecarbon. Also described are aqueous and non-aqueous inks and coatings and ink jet ink compositions containing the modified colored pigment. A method to increase the flow of an ink, as measured by glass plate flow, by incorporating the modified colored pigment as part of the ink is also disclosed as well as a method to improve the waterfastness of a print imaged by an ink composition. Also, other ink jet ink compositions are described which comprise an aqueous or non-aqueous vehicle and a colored pigment having attached an organic group having the formula: Ar-R1 (I) or Ar'R3R2 (II) wherein Ar is an aromatic group and Ar' is an aromatic group. As shown in formula (I), Ar is substituted with at least one group R1. As shown in formula (II), Ar' is substituted with at least one group R2 and at least one group R3. R1 is an aromatic or aliphatic group containing a hydrophobic group and at least one hydrophilic group. R2 is a hydrophilic group and R3 is an aromatic or aliphatic group containing a hydrophobic group, wherein the organic group is present at a treatment level of from about 0.10 micromoles/m2 to about 5.0 micromoles/m2 pigment, and wherein an image generated from the ink jet ink composition is waterfast. Lastly, non-aqeuous ink and coating formulations are described which contain an appropriate solvent and a modified colored pigment comprising pigment having attached at least one organic group, wherein the organic group comprises a) at least one aromatic group or C?1?-C12 alkyl group, and b) at least one ionic group, at least one ionizable group, or a mixture of an ionic group and an ionizable group, wherein the organic group is present in any amount.

Mesoporous carbon black and processes for making same

Abstract: The invention is directed to processes for increasing the surface area of a carbon black starting material and for forming mesoporous carbon black. The process includes the step of contacting a carbon black starting material having a first BET nitrogen surface area with an oxidant in a fluidized bed under conditions effective to form a carbon black product having a second BET nitrogen surface area greater than the first BET nitrogen surface area. The invention is also directed to carbon black product formed by this process.

Carbon foams and methods of making the same

Abstract: A method of making carbon foam is described which involves pyrolizing a mixture containing at least one pyrolizable substance and at least one unpyrolizable material and then removing the unpyrolizable material to obtain the carbon foam. Carbon foam made by this process is also described. Incorporating the carbon foam in a variety of end use applications including electrodes, thermal insulation material, polymers, and the like is also described.