The principle of pigmented carbon black, how to understand the indicators of pigmented carbon black?

The importance of carbon black dispersion.

Pigments must be dispersed to the state of fine particles in line with optical properties during application, and carbon black is one of the most difficult pigments to disperse, so the quality of carbon black dispersion will directly affect the blackness, hue and hiding ability of carbon black, and directly affect the final use effect of users.

Carbon black dispersion equipment.

Carbon black shape Dispersion equipment.

Powdered three-roller machine, mill, garden disc disperser, extruder, high-speed mixer.

Granular internal mixer, double roller machine, ball mill, sand mill.

The dispersion process of carbon black is mainly influenced by three factors.

a) The essential characteristics of carbon black: the original particle size, structure and various groups on the surface of carbon black will have a great impact on dispersion. In general, carbon black has a small original particle size, low structure, low volatile content, and is difficult to disperse, but vice versa.

b) User's formulation: The user's formulation, binder, solvent and resin properties will significantly affect the final dispersion of carbon black, especially the choice of resin for carbon black.

c) Dispersion equipment: The dispersion effect of different dispersion equipment under the same conditions is completely different. The correct selection of dispersion equipment is something that users must pay attention to.

Pigment carbon black plays an important role in products by taking advantage of its small particle size, strong tinting strength, strong blackness and hiding power.

The indexes of pigmented carbon black include particle size, specific surface area, DBP oil absorption value, tinting strength, volatile matter, pH value, hue, heating loss, density, blackness and other indicators.

1. Particle size: It represents the original particle size of carbon black, which is the average value of a certain number of particle sizes, and has nothing to do with the state of carbon black, that is, whether the carbon black is in granular form or powder form, it has no effect on the particle size of carbon black. Pigment carbon black can be divided into high-pigment carbon black, medium-pigmented carbon black and low-pigment carbon black according to different particle sizes.

2. Specific surface area: represents the surface area of each gram of carbon black, which can be measured by low-temperature nitrogen adsorption or iodine adsorption, and the unit is m2 g.

Fourth, tinting strength: can also be called tinting strength, is one of the important indicators of pigment carbon black, indicating the level of carbon black dyeing ability, generally speaking, the higher the sliding tinting strength of carbon black, the stronger the covering performance.

6. pH value: indicates the acidity and alkalinity of carbon black, and the general furnace carbon black is alkaline, and the pH value can be reduced and the volatile matter can be increased.

7. Hue: The hue of pigment carbon black is blue and yellow, and the color of the product can be adjusted, which is an important indicator of high-end pigment carbon tung black.

8. Heating reduction: represents the moisture content of carbon black at a certain temperature.

9. Density: refers to the weight of carbon black per unit volume, and the unit is g l.

Carbon black is:

Fine particles formed after incomplete combustion of coal, oil, biomass fuels, etc. When carbon black enters the atmosphere, it absorbs sunlight and reduces the amount of solar radiation reaching the ground.

The function is: mainly used as a reinforcing agent and filler for rubber, its consumption is about half of the rubber consumption, and the carbon black for rubber accounts for 94 of the total carbon black, of which about 60 is used in tire manufacturing. In addition, it is also used as a colorant for inks, coatings and plastics, as well as an ultraviolet shielding agent for plastic products. It is also an important additive in many other products, such as electrodes, dry batteries, resistors, explosives, cosmetics and polishing pastes.

Carbon and graphite materials are non-metallic solid materials dominated by carbon elements, in which carbon materials are basically composed of non-graphitic carbon, and graphite materials are basically composed of graphitic carbon. For the sake of simplicity, carbon and graphite materials are also sometimes referred to collectively as carbon materials (or carbon materials).

Carbon black is an important industrial raw material. It is a product of petrochemical oil, heavy oil, coal tar and so on. It is a light and fluffy black powder or granule.

However, there is also silica, scientific name: silicon dioxide.

Hope it helps, thank you!

Carbon black is a fine powder produced by incomplete combustion of carbon-containing raw materials (mainly petroleum). It is a pure black fine-grained or powdery substance. The depth of color, the fineness of the particles, and the specific gravity vary depending on the raw materials used and the manufacturing method.

Carbon black is insoluble in water, acid, alkali; It can be burned in the air and becomes carbon dioxide. The main component of carbon black is the element carbon, which also contains small amounts of hydrogen, oxygen, sulfur, ash, tar and water.

Commercial carbon black should have certain specifications.

Carbon black is an important pigment second only to titanium dioxide, and the world consumes about 6 million tons of rubber carbon black every year, and about 250,000 tons of special carbon black for coloring and other purposes. The so-called special carbon black refers to its use in "coloring" or "conducting", rather than the reinforcement of rubber carbon black. Carbon black is manufactured using a precisely controlled production method that can form about 50 different varieties, including 30 varieties for the rubber industry.

Several typical parameters of pigmented carbon black.

Blackness (reflectivity) – Carbon black blackness is usually expressed in the form of data measured by a "reflectance tester", which in most cases also reflects the original particle size of the carbon black and is one of the important parameters to measure the carbon black market**. The lower the reflectivity, the higher the blackness of the carbon black and the smaller the particle size. Vice versa.

Volatile matter - the number of oxygen-containing groups carried on the surface of carbon black, which reflects the surface physical properties, electrochemical properties and application performance of carbon black, is also one of the important parameters to measure the carbon black market**.

Structure—Carbon black structure is a representation of the degree of branching formed by carbon black microparticle aggregates, which indicates the degree of voids within the carbon black. It is usually expressed as the oil absorption value (DBP absorption value).

Schematic diagram of the relationship between high and low structure carbon black and application performance.

Appearance: Black fine powder.

Ash specific surface area 200 600m2 g

pH 2-8

Heating reduction 4%.

Tinting strength 120%.

Pigment carbon black is a kind of black pigment, which is now widely used in the market, mainly with coloring, anti-aging, conductive and other functions. Now the use of Xinyuan pigment carbon black in different industries is classified in detail;

Sealants: special for automotive sealants, special sealants for building sealants, special sealants for ships, special sealants for containers, special for industrial sealants, waterproof sealants, hot melt adhesives, insulating glass sealants, pigmented carbon black insulating glass butyl adhesives, neutral mildew silicone sealants, copper sealants, polyurethane sealants, neutral glass sealants, sealant strips, acid silicone sealants, butyl sealants.

Color paste: black synthetic leather color paste, printing color paste, water-based color paste, papermaking color paste, apple bag paper, PVC color paste, PU color paste, oil color paste.

Masterbatch: pigment carbon black (for EVA foaming of shoe materials), special for pigmented carbon black halogen-free cable material, (special for plastic foaming) pigment carbon black, pigmented carbon black blown film masterbatch, pigmented carbon black plastic masterbatch, pigmented carbon black PVC cable material, pigmented carbon black PVC rubber particles, pigmented carbon black polyester masterbatch, pigmented carbon black high gloss blue masterbatch, pigmented carbon black chemical fiber masterbatch, pigmented carbon black staple fiber masterbatch, pigmented carbon black calendered film, pigmented carbon black PE cable material.

Inks: high-pigment carbon black all-in-one ink, high-pigment carbon black ink ink, pigmented carbon black plastic woven bag ink, pigmented carbon black plastic ink, pigmented carbon black plastic composite ink, pigmented carbon black plastic gravure ink, pigmented carbon black gravure ink, pigmented carbon black screen printing ink, coatings: pigmented carbon black metal coatings, pigmented carbon black plastic coatings, pigmented carbon black automotive coatings, pigmented carbon black marine coatings.

Paints: pigmented carbon black motorcycle paint, automobile paint, pigmented carbon black high-temperature resistant paint, pigmented carbon black epoxy floor paint, pigmented carbon black anticorrosive paint, pigmented carbon black insulating paint, pigmented carbon black heat-resistant paint, pigmented carbon black alkyd paint, pigmented carbon black weather-resistant coating, etc.

Special carbon black and building materials: high-pigment carbon black environmental protection carbon black pencil lead, compound fertilizer pigment carbon black, pigment carbon black refractory materials, pigmented carbon black concrete foam board, ultra-fine pigment carbon black, water-soluble pigment carbon black, pigment carbon black environmental protection carbon black, pigment carbon black high temperature resistant carbon black, pigment carbon black insulating carbon black, high-gloss blue pigment carbon black, pigment carbon black artificial leather, pigmented carbon black cement joints, pigmented carbon black cosmetic mascara.

Pigment carbon black is one of the carbon black series, which mainly plays a coloring role in products.

Mainly used for: color paste coatings, paint inks, plastics, silicone rubbers, automobile tires, inks, leather, etc.

1.One of the uses of carbon black in the plastic industry is to prevent ultraviolet light aging, because carbon black has high absorbance, so it can effectively prevent plastic from being exposed to sunlight and photooxidative degradation. The roles of carbon black as a UV light stabilizer in plastics are:

Convert light energy into heat energy; Protects plastic surfaces from radiation of a certain wavelength; Interception of atomic clusters produces an anti-aging effect, thereby preventing catalytic degradation. Ultraviolet light is particularly harmful to polyolefins, and tests have shown that a certain fineness of carbon black can achieve perfect UV shielding when the concentration is 2%.

2.The protection of carbon black from UV aging of plastics depends on the particle size, structure and surface chemistry of the carbon black.

3.When the particle size of carbon black is small, due to the increase of surface area, its light absorption or shading ability increases, so the ultraviolet protection effect is enhanced, but the particle size is less than 20nm, and its protective effect tends to the same level, because when the particle size is too small, the reverse scattering decreases, and the light that continues forward will threaten the stability of the polymer.

4.The structure is low, that is, when the aggregate size is small, the protective effect on the polymer will be enhanced due to the small geometric volume of the aggregate, which is also the reason why the carbon black with a lower structure is blacker.

5.There are many oxygen-containing groups on the surface of carbon black, that is, when the volatile content is high, the genes generated during the decomposition of the polymer can be eliminated, so the protective effect is also enhanced.

Pigment: carbon black, motorcycle paint, automobile paint, pigment carbon black, PVC cable material. Special carbon black and building materials, butyl sealant, pigment carbon black environmental protection carbon black, high pigment carbon black ink ink, pigment carbon black blown film masterbatch, polyurethane sealant, pigment carbon black high gloss blue color masterbatch: high pigment carbon black environmental protection carbon black pencil lead, acid silicone sealant, printing paste.

Inks, pigmented carbon black plastic composite inks, pigmented carbon black marine coatings; Sealant, mainly colored, pigmented carbon black automotive coatings, special marine sealants, pigmented carbon black plastic inks, pigmented carbon black heat-resistant paints: pigmented carbon black (for shoe material EVA foaming), pigmented carbon black alkyd paint, PVC colorant, now widely used in the market, pigmented carbon black high-temperature resistant carbon black, pigmented carbon black screen printing ink, neutral glass sealant, conductive and other functions, pigmented carbon black epoxy floor paint. Now the use of Xinyuan pigment carbon black in different industries is classified in detail, water-soluble pigment carbon black, pigmented carbon black insulating paint, sealant strips, pigmented carbon black PE cable materials, pigmented carbon black plastic masterbatch

High pigment carbon black integrated machine ink, pigment carbon black calendered film, pigment carbon black PVC pvc particles: special for automotive sealant, pigment carbon black for compound fertilizer: pigmented carbon black metal coatings, pigmented carbon black artificial leather, pigmented carbon black chemical fiber masterbatch, insulating glass sealant, pigmented carbon black halogen-free cable material, pigmented carbon black plastic coatings, pigmented carbon black plastic gravure ink, pigmented carbon black insulating glass butyl glue, hot melt adhesive, PU color paste, neutral mildew anti-mildew silicone sealant, ultra-fine pigment carbon black, Pigmented carbon black for anticorrosive paint, pigmented carbon black for refractories, (special for plastic foaming) pigmented carbon black.

Masterbatch, pigmented carbon black weather-resistant coatings, etc., oil-based colorant, pigmented carbon black cement joints, container sealants, building sealants, water-based colorants, industrial sealants, pigmented carbon black cosmetic mascara. Color paste, apple bag paper, pigment carbon black polyester masterbatch, pigment carbon black plastic woven bag ink pigment carbon black is a black pigment, pigment carbon black staple fiber masterbatch, pigment carbon black gravure ink, pigment carbon black high temperature resistant paint, pigment carbon black concrete foam board, coatings. Paints, anti-aging:

Black synthetic leather color paste, high gloss blue pigment carbon black, waterproof sealant, copper sealant, papermaking color paste, pigment carbon black insulating carbon black.