Rubber blacks

Rubber Reinforcing filler in tires and mechanical rubber components 

Plastics Black and gray pigmentation, tinting, UV protection, conductivity, conductor coatings 

Paper Black and gray pigmentation, conductivity, decorative and photo-protective papers 

Power Carbon brushes, electrodes, battery cells 

Metal reduction, compounds Metal smelting, friction compound 

ASTM No. Iodine adsorption mg/g DBP absorption ml/100 g Use in natural and synthetic rubber 

N115 160 113 Tire treads, rubber goods with high abrasion resistance (also as blend with N220 and N330 and N326) 

N121 121 132 Tire treads for high performance passenger cars 

N125 117 104 Tire treads for trucks, off-road tires 

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Poiyurelhane raw rubber + black Polyurethane casting rubber Natural rubber + black Nitrile rubber + black... 

NR-butadiene rubber black sidewall compound. They are reported as particularly valuable for use in light-colored stocks. 

SHOES SHOWER RUBBER BLACK W/CROSS STRAP ADULT SZ LARGE 725 6532014697520 PG 57.60 ... 

Ingredient Red Rubber Gray Rubber Gray Rubber Black Rubber... 

Other pigment blacks and the rubber blacks are compacted by granulation. Two processes are used dry and wet pelletization. Dry pelletization is a simple, energysaving method, but it does not work with all types of carbon black. It is mainly used for color blacks. Dry pelletization is carried out in rotating drums, where the powdery carbon black rolls to form small spheres. 

Table 30 lists furnace rubber blacks which are currently used and their main application fields. 

According to the ASTM classification (ASTM D 1765 and D 2516), rubber blacks are characterized by one letter and three digits. The former shows the influence of... 

Table 32. Classification of rubber blacks according to ASTM D 1765 and ASTM D 2516...

In 1995, approximately 6 to 6.5 x 106 t of carbon black were produced. Production capacities were estimated at the same time to be 8 x 106 t/a (Table 34). The annual growth rate, on the average 7.9% per year between 1965 and 1975 in the United States, has decreased substantially, primarily in respect of rubber blacks due to longer tire life and the fact that the car market is reaching a saturation. Therefore, the future growth rate of the carbon black market is expected to be rather limited and will not exceed 1 to 2 % per year. 

The N 300 series is characterized by a wide variety of rubber blacks, covering about 10 different types. As mentioned above, fme-particle active blacks are used for rubber components that need to withstand significant levels of mechanical stress, e.g. tire treads. Semi-active blacks, on the other hand, are used in the tire carcass but also in technical rubber components, from screen and door seals to floor mats. Tires also contain other special carbon blacks, for instance, so-called adhesion blacks for improving radial steel belt adhesion, conductive blacks or inactive blacks for higher filler load rates [4.26]. 

Carbon blacks can be classified according to application sector as rubber blacks, dye or pigment blacks and special blacks. The most important and largest consumer of carbon... 

Important physical characteristics for rubber blacks are, in addition to the average particle size, the DPB (dibutyl phthalate) absorption, which increases with increasing structure (agglomeration of primary particles), and the specific (nitrogen) surface area, which increases with decreasing particle size and increasing porosity of the primary particles, (see Table 5.7-7). 

Colma SL Sealant Nemours Sika Chemical Co. propylene rubber — black color Self leveling, gray color 26.0 C... 

Pliskin and Tokita70 developed a technique which makes it possible to separate what they term truly adsorbed rubber from other insoluble gel in rubber/black mixes. This presumably includes very highly convoluted material and lightly cross-linked elastomer resulting from a variety of causes. They then analyse their results to estimate the thickness of the layers of various elastomers adsorbed onto carbon black. 

Physical properties Chemigum SL gum stock Natural rubber Cold rubber black tread... 

Resin, (Phenolic - Urea) (Series Of Additives) g 631-2799 Rubber, Black h 631-0404... 

As particle size grows, the specific surface area of the carbon blacks diminishes. A distinction is made between active rubber blacks with a specific area from 70 to 150 mVg, which are commonly used in the production of tire treads, and semi-active blacks, used for tire carcasses, which have a specific surface area of 15 to 70 mVg. Inactive carbon blacks have a specific surface area of <15 mVg they are commonly used as fillers in the production of industrial rubber goods. 

SBRS1606 Styrene-butadiene rubber black masterbatch, 52 pphr N330, 10 pphr oil... 

SBRS1808 styrene butadiene rubber, black masterbatch, 75 pphr N330, 50 pphr oil... 

The lampblack process is one of the oldest commercial processes, in which the fuel is burned in a pan beneath a fume hood lined with refractory bricks and cooled process gases containing carbon black are cooled and filtered. The process is used today for standard grades of pigment and rubber black they have coarse primary particles and broad distribution of sizes from 60 to over 200 pm. Despite development of alternatives, it has not yet been possible to replace these grades in their specific applications. 

Carbon blacks have been classified by their production process, by their production feedstocks such as acetylene blacks, by their application field, such as rubber blacks, color blacks, electric conductive blacks, and by properties of end-use... 

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