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.

Factors affecting the adsorption of stabilisers on to carbon black (flow micro-calorimetry studies): Part II : Hindered amine light stabilisers (HALS)

Abstract: The interaction of hindered piperidine light stabilisers (HALS) with carbon black has been examined using flow micro-calorimetry (FMC) and Fourier transform infrared spectroscopy (FTIR). Significant differences in both the overall adsorption activity and molar heats of probe adsorption are observed. Differences in adsorption behaviour between different types of carbon black were clearly evident and, as with a previous paper (see reference 1, in the latter paper, surface chemistry of the carbon blacks investigated is extensively analysed by XPS, FTIR, N2 BET adsorption and Karl–Fischer analysis), were mainly to be due to differences in carbon black surface chemistry. The specific surface area merely physically affected the level and heat of adsorption (per unit mass of carbon black). Variation in the degree of substitution of the piperidine amine is an important factor that is found to influence the adsorption activity of HALS, as well as the number of adsorption active and sterically accessible functional groups per HALS molecule. In some cases the adsorbed HALS could be detected by FTIR; shifts in absorption frequencies associated with both the adsorbate and the substrate yielded significant insight into the mode of adsorption of several of the HALS investigated.

Synthetic latex compositions and articles produced therefrom

Abstract: Synthetic latex compositions and articles produced therefrom having improved tear strength while minimizing the effect on modulus. The compositions include a synthetic rubber latex and fumed silica typically present in an amount ranging between 0.5% and 5.0% by weight of rubber solids. In a preferred embodiment, the fumed silica is introduced into the synthetic rubber latex as an aqueous dispersion of fumed silica.

Thermally responsive current regulating devices

Abstract: The present invention concerns thermally responsive current regulating devices comprising conductive polymeric compositions. Broadly, the devices of the invention comprise electrodes attached to a current controlling polymeric composition comprising a polymer and having dispersed therein the quantity of submicron sized particulate conductive filler. The electrical resistance of such devices varies substantially and reproducibly with variation in temperature through the glass transition temperature range of the polymeric constituent.

Comparison of polyethylene glycol adsorption to nanocellulose versus fumed silica in water

Abstract: The recent intensification of industrially produced cellulose nanocrystals (CNCs) and cellulose nanofibrils has positioned nanocelluloses as promising materials for many water-based products and applications. However, for nanocelluloses to move beyond solely an academic interest, a thorough understanding of their interaction with water-soluble polymers is needed. In this work, we address a conflicting trend in literature that suggests polyethylene glycol (PEG) adsorbs to CNC surfaces by comparing the adsorption behaviour of PEG with CNCs versus fumed silica. While PEG is known to have strong hydrogen bonding tendencies and holds water tightly, it is sometimes (we believe erroneously) presumed that PEG binds to cellulose through hydrogen bonding in aqueous media. To test this assumption, the adsorption of PEG to CNCs and fumed silica (both in the form of particle films and in aqueous dispersions) was examined using quartz crystal microbalance with dissipation, isothermal titration calorimetry, rheology and dynamic light scattering. For all PEG molecular weights (300–10,000 g/mol) and concentrations (100–10,000 ppm) tested, strong rapid adsorption was found with fumed silica, whereas no adsorption to CNCs was observed. We conclude that unlike silanols, the hydroxyl groups on the surface of CNCs do not readily hydrogen bond with the ether oxygen in the PEG backbone. As such, this work along with previous papermaking literature supports the opinion that PEG does not adsorb to cellulose surfaces.

Skim compounds incorporation low ash carbon blacks

Abstract: Fabric or wire skim compounds having low moisture absorption properties that comprise rubber and a carbon black having an ash content of less than or equal to 0.2 % by weight, preferably less than or equal to 0.1 %, by weight, a structure represented by DBP (dibutyl phthalate absorption) of 50-160 cubic centimeters per 100 gram (cc/100g), an Iodine Number (I2No.) of 10-180 milligrams per gram (mg/g), preferably 50-130 mg/g, and a Tint value of 30-140 %, preferably 60-140 %. More preferably, the carbon black is further characterized by having a CDBP of 40-120 cc/100g, preferably 50-120 cc/100g, and a CTAB level of 10-125 square meters per gram (m2/g), preferably 60-125 m2/g. Also disclosed are reinforcing materials coated with skim compounds of the present invention.