The present invention generally relates to a method for preparing a carbon black of high resistivity through the surface treatment of the carbon black which exhibits conductivity, and a carbon black prepared by this method.

Disclosed is an impurity removal and modification method for pyrolysis carbon black of waste tires, the method comprising: dispersing pyrolysis carbon black of waste tires in an alkali solution of potassium ferrate; adding hypohalite; leaving to stand for layering; and performing centrifugation and washing on a lower-layer slurry to obtain a stably dispersed pyrolysis carbon black/water suspension. This modification method can be operated simply and easily; and by means of the method, ash in pyrolysis carbon black of waste tires can be effectively removed, and the pyrolysis carbon black is then stably dispersed in water. In addition, the modification method is low in production cost, and is green and environmentally friendly, and a waste liquid thereof can be recycled.

Non-ASTM low hysteresis carbon blacks chemically treated, and surface coated with a compound comprising at least one amine group and at least one thiol group, and/or di- and/or polysulfidic linkage. When compared with a standard ASTM grade compound, the disclosed surface modified low hysteresis carbon black compound shows improved rolling resistance, wet traction, and DIN abrasion, comparable to silica compounds.

The present invention is to provide a surface-modified nanodiamond having excellent affinity for an organic solvent and a resin and having high dispersibility in an organic solvent and in a resin. The surface-modified nanodiamond according to an embodiment of the present invention has a structure in which a surface of a nanodiamond particle is modified by a group represented by Formula (1) below. In Formula (1), R.sup.1 represents an aliphatic hydrocarbon group having 6 or more carbons. R.sup.2 and R.sup.3 may be the same or different and are each a hydrogen atom, an aliphatic hydrocarbon group having from 1 to 3 carbons, or a group represented by Formula (2) below. ##STR00001##

Non-ASTM low hysteresis carbon blacks chemically treated, and surface coated with a compound comprising at least one amine group and at least one thiol group, and/or di- and/or polysulfidic linkage. When compared with a standard ASTM grade compound, the disclosed surface modified low hysteresis carbon black compound shows improved rolling resistance, wet traction, and DIN abrasion, comparable to silica compounds.

A bifunctional plant growth promoter and methods of preparing the plant growth promoter. The plant growth promoter comprises nano carbon black modified with carboxyl groups referred to as “carbon black acid”. The nano carbon black has a structure forming a first functional part of the plant growth promoter and the carboxyl groups form a second functional part of the plant growth promoter. The plant growth promoter has an average particle size in a size range of 5 nm to 200 nm and a mass fraction of carboxyl groups in a mass fraction range of 5% to 25%.

The present disclosure provides a solid carbon black material including an oxidized carbon black having a pH of greater than 7, compositions including such solid carbon black material and a polymer component as well as articles made therefrom. The disclosure also concerns a method for manufacturing said solid carbon black material. The solid carbon black material is particularly useful for obtaining rubber compounds with low hysteresis, e.g. for the production of energy-saving tires, with enhanced curing rates compared to the use of conventional oxidized carbon blacks.

High jetness carbon black compositions using carriers to improve dispersion and maintain good masstone and undertone properties.

Non-ASTM low hysteresis carbon blacks chemically treated, and surface coated with a compound comprising at least one amine group and at least one thiol group, and/or di- and/or polysulfidic linkage. When compared with a standard ASTM grade compound, the disclosed surface modified low hysteresis carbon black compound shows improved rolling resistance, wet traction, and DIN abrasion, comparable to silica compounds.

Pigmented masonry compositions are provided that include chemically treated carbon black pigments having attached an organic group including an ionic or an ionizable group, the ionic or ionizable group being present at a level from 1.0 to 3.0 μmol/m.sup.2. The compositions exhibit excellent color consistency and jetness and provide consistent color after long term exposure to high levels of moisture.