Brochure: Carbon Additives for Polymer Compounds - Timcal Graphite

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Typical applicaTions for Ensaco® conducTivE carbon black 14 Rubber Carbon black is one of the main ingredients of any rubber compound. Conductive carbon blacks are before all carbon blacks, to be mixed and handled as any other reinforcing or semireinforcing carbon black. They are high structure materials bulky by nature. Although the common carbon blacks are conductive by nature and impart also conductivity to the compounds when used in sufficiently high loading, conductive carbon blacks have the advantage to reach conductivities at lower loading and are often used to give the final boost to a compound already filled with other carbon blacks. As carbon black structure is the parameter determining the conductivity, structure being an additive property, the combinations of conductive and normal black can be predicted. Specifications of rubber compounds being usually quite complex and conductivity being only one of the numerous physical requirements, the use of carbon black blends is very often the only solution. In some specific cases, especially in special polymers, it occurs that the conductive carbon black is used by its own in order to maintain mechanical properties and processing at a good level. ENSACO® carbon blacks are, quite close to furnace blacks as far as the reinforcing activity is concerned. Especially the low surface area carbon blacks, grades 150, 250 and 260, are, due to their very easy dispersion, quite performing in most rubber compounds. ENSACO® 350 is also used in some compounds where small additions are required. A few conductive applications: • belt cover compounds; • flooring; • conveyer belts; • hoses for fuel, for conveying of powders, etc.; • cylinder coating; • shoe soles; • seals. ENSACO® 150 and 250 are also used in non conducting applications where the compounder can take profit of the low surface area and high structure of those blacks: • low hysteresis with relatively high hardness; • good thermal aging; • very good tear strength; • very good dispersion, very good mechanical performance at thin layer. A few non-conductive applications: • antivibration systems; • textile coating; • membranes; • articles exposed to chipping and chunking. In the following pages there are some of the results of experimental work carried out on EN- SACO® Conductive Carbon Blacks in different rubber compounds. The data shown here are given as orientation and are valid for the particular formulations and sample preparation technique mentioned. Results in other polymers, full studies and publications are available upon request.
nBR ConduCTIvE HoSE CoMpound A B Compound EnSACo® 250 Compound n-472 NBR NT 3945 100 100 ENSACO® 250 25 N-472 25 N-550 40 40 ZnO 4 4 Stearic acid 0.5 0.5 DOP 30 30 Sulphur 0.4 0.4 Methyl Thuads 2 2 Amax 2 2 By courtesy of Bayer ConduCTIvE CR ConvEYoR BELT CovER CoMpound A B Compound EnSACo® 250 Compound n-472 Bayprene 610 (CR) 100 100 Buna CB 10 2 2 MgO Powder 4 4 N-472 30 ENSACO® 250 30 Vulkanox DDA 1.5 1.5 Vulkanox 4020 0.5 0.5 Ingralen 450 15 15 ZnO Powder 5 5 Rhenogran ETU-80 0.2 0.2 Stearic acid 0.5 0.5 By courtesy of Bayer A B Compound EnSACo® 250 Compound n-472 t90% (min) 11.46 11.37 Mooney ML (1+4) at 100° C 45.7 47.2 vulcanizate data unaged at RT Shore A Hardness 70.9 72.2 Stress-strain Elongation at break (%) 339 311 Tensile Strength (MPa) 13.8 14.8 Modulus 100% (MPa) 3.9 4.6 Modulus 300% (MPa) 8.6 10.3 Modulus 500% (MPa) 12.6 14.4 Resistivity (Ohm.cm) 79 360 Tear Strength (N/mm) 32.4 31.8 A B Compound EnSACo® 250 Compound n-472 dispersion Rating dIk 86.8 85.8 t90% (min) 20.7 21.8 Mooney ML(1+4) at 100°C 62 64 vulcanizate data unaged at RT Shore A hardness 62 64 Stress-strain Elongation at break (%) 676 540 Tensile Strength (MPa) 23.4 22.4 Modulus 50% (MPa) 1.2 1.4 Modulus 100% (MPa) 2.4 2.7 Modulus 300% (MPa) 9.2 11.5 Modulus 500% (MPa) 16.1 20.6 Compression Set 24h at 70°C (%) 18 19 Resistivity (Ohm.cm) 100 800 15 Typical applicaTions for Ensaco® conducTivE carbon black
Page 1 and 2: Carbon Additives for Polymer Compou
Page 3 and 4: Contents EnSACo® Conductive Carbon
Page 5 and 6: Introduction to TIMREX® Graphite a
Page 7 and 8: EnSACo® Conductive Carbon Black fo
Page 9 and 10: EnSACo® Conductive Carbon Black TI
Page 11 and 12: EnSACo® ConduCTIvE CARBon BLACkS I
Page 13: EnSACo® ConduCTIvE CARBon BLACkS I
Page 17 and 18: power cables and accessories Conduc
Page 19 and 20: Incorporation of graphite powder in
Page 21 and 22: InFLuEnCE oF TIMREX®GRApHITE And C
Page 23 and 24: THERMALLY ConduCTIvE poLYMERS Therm

Brochure: Carbon Additives for Polymer Compounds - Timcal Graphite

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