Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7147/28A
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IG Farbenindustrie AG
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IG Farbenindustrie AG
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Publication date
Application filed by IG Farbenindustrie AGfiledCriticalIG Farbenindustrie AG
Publication of GB287845ApublicationCriticalpatent/GB287845A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
287,845. I. G. Farbenindustrie Akt.- Ges. March 26, 1927, [Convention date]. Addition to 287,050. Benzanthrone dyes. - The 4: 5 : 8 : 9-dibenzpyrene-3 : 10-quinones of the parent Specification are converted into new vat dyes by treating with a halogen or halogenating agent in the presence or absence of a carrier. By the introduction of chlorine into the original dyestuff brighter tints are obtained, while brominating gives darker tints. In examples, the 4 : 5 : 8 : 9-dibenzpyrene- 3 : 10-quinone is dissolved in chlorsulphonic acid and treated (1) with chlorine in the presence of iodine and (2) with bromine ; the products dye cotton from the vat in reddish-orange and bluishred tints fast to chlorine and washing.
GB7147/28A1927-03-261928-03-07Manufacture of vat-dyestuffs of the pyrenequinone series
ExpiredGB287845A
(en)