Blacks for Plastics

Unlike other pigments, carbon black used in plastics processing not only yields coloristic effects but also modifies the electrical properties, provides heat and UV resistance, and may act as a filler to modify mechanical properties. 

Tinting of Plastics. Carbon black is used in large amounts for the black and gray tinting of plastics, including polyethylene, polypropylene, polyfvinyl chloride) 

Black concentrations of 0.5-2% are required for full-tone tinting. For crystal-clear plastics, the addition of up to 1 % carbon black is generally sufficient. Plastics with marked intrinsic color (e.g., ABS) are tinted with blacks of higher tinting strength at concentrations of 1-2%. Transparent tints have black contents of 0.02-0.2%. 

Most of the carbon black used in the plastics industry is produced by the furnace black process (see Section 4.4.1). Fine furnace blacks often appear more bluish than coarse ones in incident light (full-tone tinting) but more brownish in transmitted light (transparent tinting) and in gray tints. By controlling the conditions of black manufacture, however, substantial shifts in hue can be achieved. Bluish carbon blacks are commonly preferred because of the impression of greater color depth. 

Blacks for the tinting of products used for food packaging and storage must comply with relevant legal provisions. 

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Pigment Blacks for Plastics, Degussa Technical Bulletin No. 40, Frankfurt am Main (1998). 

Dispersion of Carbon Black for Plastics, Inks, Coatings, and Other Special Applications. 

Black Pearls . [Cabot] Pelleted carbon black for plastics, coatings. 

Accorsi J and Romero E (1995) Special Carbon Black for Plastics. Plastics Engineering 29-32... 

Accorsi, J.V. and Romero, E. (1995) Special carbon blacks for plastics. Plastics... 

Cabot Corp. CABOT Special Blacks for Plastics fContinued1 ... 

U.S. consumption of carbon black in 1988 by various market sectors is shown in Table 6. About 90% of total consumption is in the mbber industry and 69% for tires. About 10% is consumed for other automotive products and 11% for mbber products unrelated to the automotive industry. The automotive industry accounts for 79% of consumption. Pigment appHcations account for about 10% of consumption, most of this for plastics and printing inks. Western Europe consumes 74% in tires and other automotive products and almost 20% in other industrial mbber products. Pigment appHcations in Western Europe and Japan are 5—6% of consumption. 

Chrome Iron Nickel Black, pigment for plastics, 7 369t... 

Copper Chromate Black, pigment for plastics, 7 369t Copper chromite, molecular formula, properties, and uses, 6 563t Copper chromite black spinel, formula and DCMA number, 7 348t Copper citrate, molecular formula, 6V638t Copper compounds, 7 767-783 analytical methods, 7 773-776 economic aspects, 7 773 health and safety factors, 7 776 properties and manufacture, 7 768-773 uses, 7 776-780... 

Iron blacks, 79 401-402 Iron blast furnace, 76 141-143 Iron Blue, pigment for plastics, 7 370t Iron blue pigments, 79 407 Iron(II) bromide, 74 539 Iron(III) bromide, 74 539-540 Iron brown hematite, formula and DCMA number, 7 347t Iron browns, 79 402 Iron carbide, 4 649t, 690—692 lattice, 4 652... 

Iron-carbon phase diagram, 76 196-197 Iron castings, tellurium in, 24 424 Iron(II) chloride, 74 538 Iron(III) chloride, 74 539 Iron(III) chloride hexahydrate, 74 539 Iron(II) chloride tetrahydrate, 74 538 Iron Chromate Black, pigment for plastics, 7 369t... 

IRON COBALT CHROMITE BLACK, PIGMENT FOR PLASTICS... 

Of the 10% of carbon black used for nonrubber applications, about 35% is used for plastics, 30% for printing inks, 10% coating, and 5% for paper. In plastics, carbon black... 

Relatively coarse-grained oxidized gas blacks with high volatiles contents are especially suitable for plastics with good electrical insulation (e.g., cable sheathing compounds, plastics for high-frequency welding, toners). 

The term carbon black describes a group of industrial carbons created through the partial combustion or the thermal decomposition of hydrocarbons. Carbon black is unique in that it possesses the smallest particle size and highest oil absorption among the commercially available pigments for plastics. These characteristics help explain carbon black s excellent color strength, cost-effectiveness, and ultraviolet (UV) performance and place it as the most widely used black pigment for thermoplastic applications. 

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