Method of improving pigment fluorescence
AssigneeCiba Specialty Chemicals Corporation
InventorsIain Frank Fraser, Sharon Kathleen Wilson, Ian Alexander Macpherson
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Abstract
A process for the preparation of organic pigments with enhanced fluorescence, which process comprises treating said pigments with a surfactant, and to the fluorescent organic pigments obtained by said process. The pigments according to the present invention can be used in marking applications, wherein durable fluorescence is required.
Claims12
A process for the preparation of C.I. Pigment Yellow 14 with enhanced fluorescence, which process comprises treating the pigment with the surfactant N,N-dimethylcocoamine during synthesis of the pigment.
A process for the preparation of C.I. Pigment Yellow 63 with enhanced fluorescence, which process comprises treating the pigment with the surfactant N,N-dimethylcocoamine during synthesis of the pigment.
A process for the preparation of C.I. Pigment Orange 16 with enhanced fluorescence, which process comprises treating the pigment with the surfactant N,N-dimethylcocoamine during synthesis of the pigment.
Dependencies are inferred from the claim text.