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US 3,937,666 AGranted
Use of thioindigo for obtaining fluorescent dyeings in polyvinyl chloride
AssigneeHoechst Aktiengesellschaft
InventorsHugo Schafer, Erwin Janousch
Life of this patent
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Abstract
A process for the fluorescent dyeing of polyvinyl chloride which consists in incorporating thioindigo into a composition consisting essentially of polyvinyl chloride, and the fluorescent dyed polyvinyl chloride composition thus produced.
Claims2
A fluorescent dyed polyvinyl chloride homopolymer composition consisting essentially of solid polyvinyl chloride homopolymer and an amount of unsubstituted thioindigo sufficient to effect fluorescence.
Dependencies are inferred from the claim text.