Patent ID: 7056958

Claim:
A method of producing black-colored polyurethane foam article comprising the steps of (a) providing a polyol composition; (b) providing an isocyanate composition, wherein at least one of the group consisting of the polyol composition and the isocyanate composition comprises a black colorant formulation comprising at least one black coloring agent and at least one discrete toner compound independent of the black coloring agent; wherein said toner compound comprises a triphenylmethane chromophore exhibiting at least one absorption peak and a λ max between 560 and 610 nm within said article; (c) optionally providing a composition comprising at least one black coloring agent and at least one discrete toner compound independent of the black coloring agent; wherein said toner compound comprises a triphenylmethane chromophore exhibiting at least one absorption peak and a λ max between 560 and 610 nm within said article; and (d) reacting each composition of steps “a”, “b”, and, if present “c” together in the presence of a catalyst to form said polyurethane foam; wherein the cumulative mass of said at least one toner compound provided in steps “a”, “b”, and, if present “c” is not more than 6% of the cumulative mass of said at least one black coloring agent in steps “a”, “b”, and, if present “c”.