Crystal modification of C.I. Pigment Yellow 16

Details Crystal modification of C.I. Pigment Yellow 16 Crystal modification of C.I. Pigment Yellow 16

1992-10-29

1993-11-30

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

106493, 106494, 534746, 534748, C09B 33153

Patent

active

052661105

ABSTRACT:
The invention relates to three new crystal modifications (.gamma., .delta., .epsilon. modification) of C.I. Pigment Yellow 16 ##STR1## having their characteristic reflections in the X-ray diffraction spectrum. The new crystal modifications are prepared by heat treatment of the known .alpha. or .beta. modification in selected organic solvents.

REFERENCES:
patent: 4048152 (1977-09-01), Ribka et al.

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