Pigment dispersions and pigmented products

摘要

Pigmented cellulose acetate filaments are produced by mixing a dispersion of titanium dioxide in a carboxylate ester of a polyhydric alcohol with cellulose acetate and a solvent for cellulose acetate. The resulting dispersion of titanium dioxide in a solution of cellulose acetate is dry spun to produce pigmented cellulose acetate filaments. In a preferred titanium dioxide dispersion for use in the process, the titanium dioxide is dispersed in a polyhydric alcohol ester of a monocarboxylic acid having up to 6 carbon atoms, for example glycerol triacetate. The pigmented filaments can be used in cigarette filters.