Crystal growth modifiers for perylene pigments

Details Crystal growth modifiers for perylene pigments Crystal growth modifiers for perylene pigments

1996-05-13

1998-05-19

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106493, 106494, 106498, 546 37, C09B 4800

Patent

active

057530300

ABSTRACT:
This invention relates to pigment compositions prepared by precipitating a blend of (a) about 60 to about 95 percent by weight of a perylene pigment having the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl; and (b) about 5 to about 40 percent by weight of a polycyclic aromatic compound containg at least 5 aromatic rings wherein at least one ring is substituted with at least one keto group.

REFERENCES:
patent: 3877935 (1975-04-01), Regensburger et al.
patent: 4432796 (1984-02-01), Santimauro
patent: 4655845 (1987-04-01), Spietschka et al.
patent: 4882254 (1989-11-01), Loufty et al.
patent: 5453151 (1995-09-01), Babler
patent: 5518539 (1996-05-01), Hao et al.
W. Herbst and K. Hunger, Industrial Organic Pigments (New York: VCH Publishers, 1993) (month unavailable) pp. 9, 447-463, 467-475, 501-505, 509-511.
H. Zollinger, Color Chemistry (New York: VCH Verlagsgessellschaft, 1991), month unavailable) pp. 225, 227-228, 236-240, 296-298.
The Chemistry of Synthetic Dyes and Pigments, ed. H.A. Lubs (Malabar, Florida: Robert E. Kriegar Publishing Company, 1955) (month unavailable) pp. 444-446, 481-482.

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