EDISON, NJ—A new "Super Black #34-81107" paste colorant for flexible urethane foam is 4 to 6 times stronger than traditional carbon black colorants at equivalent viscosities, says Thomas Loschiavo, marketing manager of Ferro's Liquid Coatings and Dispersions Division.

The strength of the new colorant reportedly equals that of dyes, making unnecessary the practice of "bumping" carbon black colorants with dyes to achieve intense black coloration.

The Super Black colorant is comprised of 35 to 40 percent solids by weight (versus 10 to 12 percent solids for conventional carbon black colorants) and a totally reactive polyether polyol resin vehicle. Proprietary processing reduces pigment agglomerates to individual particles, which are reportedly smaller and distribute more uniformly over urethane foam cells than do pigments of conventional carbon black colorants. The resulting increase in tinctorial strength, coupled with 190 to 300 percent higher pigment loadings, can reduce typical letdowns of 3.0 pph using conventional blacks, to 0.5 pph using the Super Black colorant at equivalent levels of jetness. To achieve intense black coloration without the addition of dyes, letdowns of 5.0 pph are recommended.

The new colorant is said to reduce coloring cost by approximately 50 percent.

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