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US 6,713,636 B2Granted
Thloxanthone dyes with improved solubility and a method of preparing 2-oxybenzanthrones as intermediate materials for making of these dyes
Assignee3M Innovative Properties Company
InventorsViktor Mihailovich Shershukov, Alexander Nikolayevich Artukhov
Life of this patent
Estimating the term…
Abstract
The invention relates to new thioxanthone compounds having utility as fluorescent dyes and processes for their manufacture.
Claims5
A compound of the thioxanthone series with improved solubility of the general formula
- wherein R1 is a straight chain alkyl group having from 6 to 22 carbon atoms;
- R2, R3 and R4 are each, independently, hydrogen or alkyl having from 1 to 4 carbon atoms.
A compound, being 6-(n-octyloxy)-14H-anthra(2,1,9-mna)thio-xanthene-14-one.
Dependencies are inferred from the claim text.