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.

Ink compositions having modified pigments with high or low treatment levels

Abstract: Ink compositions having modified pigments with high or low treatment levels are described. Ink compositions having modified pigments with high treatment levels comprise 1) at least one liquid vehicle and 2) at least one modified pigment, wherein the modified pigment comprises at least one pigment having attached at least one organic group substituted with at least one anionic group, at least one anionizable group, or a mixture thereof, wherein the organic group is present at a treatment level of from about 4.5 to about 7.5 micromoles/m2 of the pigment used based on nitrogen surface area of the pigment. Ink compositions having modified pigments with low treatment levels comprise 1) at least one liquid vehicle and 2) at least one modified pigment, wherein the modified pigment comprises at least one pigment having attached at least one organic group substituted with at least one cationic group, at least one cationizable group, or a mixture thereof, wherein the organic group is present at a treatment level of from about 1 to about 4 micromoles/m2 of the pigment used based on nitrogen surface area of the pigment. The present invention further relates to methods for improving intercolor bleed properties of an ink, by using the above-described components in an ink.

Process for preparing xerogels

Abstract: of EP0658513The invention relates to a process for preparing modified SiO2 gels, known as "xerogels", and also to the xerogels thus prepared themselves and their use. The xerogels are prepared by acidifying an aqueous waterglass solution, polymerising the silicic acid thus formed by addition of a base to give an SiO2 gel, substantially washing the water from the gel using an organic solvent, reacting the gel with a silylation agent and then drying it at from -30 to 200 DEG C and at from 0.001 to 20 bar.

Comparing Soft Semicrystalline Polymer Nanocomposites Reinforced with Cellulose Nanocrystals and Fumed Silica

Abstract: This work compares solvent-cast poly(ethylene oxide) (PEO) nanocomposites reinforced with cellulose nanocrystals (CNCs) and fumed silica. Mechanical properties and crystallization behavior were investigated over a range of polymer molecular weights (10 000–100 000 g/mol) and particle loadings (1–10 wt %). Polymer adsorption to CNCs and fumed silica was found to alter PEO undercooling and inhibit crystal nucleation. Atomic force microscopy revealed PEO adsorbs to CNCs in a shish-kebab morphology that is readily incorporated into the crystalline domains of the polymer. Tensile testing and nanoindentation showed that Young’s modulus increased by more than 60% for CNC reinforced nanocomposites, and that the Halpin–Kardos model could effectively describe the mechanical properties. Fumed silica reinforced nanocomposites were fit to the Guth–Gold micromechanical model using effective particle volume fractions. Although only solvent-cast nanocomposites were investigated, this work provides new insight into the in...

A case study—combining incident investigation approaches to identify system-related root causes

Abstract: This case study demonstrates an effective incident investigation approach to identify system-related root causes. The premise is simple: “What people do makes sense to them at the time.” The approach combines human error concepts and human factors analyses. The combined approach helps define and eliminate “hindsight bias” (the investigator's bias that exists because of the known bad consequence). The case study's human error mistake was simple and straightforward; however, it failed to capture the role that previous decisions played in the incident. The team's original recommendation was to “be more careful next time.” However, a deeper process safety management system-related issue was uncovered by continuing the probe using the human error “root cause” as the starting point of the investigation. This is the point where the real systemic issues are found. This case study showed how poor communications between the different people involved with engineering design, contractor fabrication, equipment inspection, and subsequent site installation caused the incident. The final recommendation of the team was to link the separate management of change (MOC), prestartup safety review (PSSR), and mechanical integrity quality assurance-related efforts together, ensuring an inspection step for “replacement-in-kind.” In conclusion, the combined approach helps the team better understand the timing and conditions of the event, better understand why people make the decisions they make at the time the event unfolds, and ensures that systemic root causes are discovered so that more appropriate, system-related preventive measures are chosen and implemented. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

Asphalt cement and concrete compositions and filler compositions therefor

Abstract: There are provided improved asphalt cements and bituminous paving compositions containing certain reinforcing filler compositions which impart desirable properties thereto. The filler compositions of the invention are asphalt-dispersible pellets comprising certain carbon blacks which have been treated with certain non-volatile petroleum oils.