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Philip Arthur Newton
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22,818. Newton, P. A., [Farbenfabriken vorm. F. Bayer & Co.]. Oct. 16. Samples furnished under Section 2 of Patents &c. Act, 1907. Dyes, artificial.-Dye-stuffs of the phthalein series which dye mordanted fibres fast clear-red shades are produced by condensing amino-m-oxybenzoylbenzoic acids substituted in the amino group, or their homologues, with 1:2:4-trihydroxybenzene or its triacetate. On treatment with dehydrating - agents, green mordant dye-stuffs result, which can also be directly produced by treating a mixture of the above-mentioned acids with 1 : 2: 4-trihydroxybenzene or its triacetate, with dehydrating-agents. In an example the production of a red, and of the corresponding green dye, is described from diethylamino-m-oxybenzoylbenzoic acid. The properties of the green dyestuffs produced from the diethylamino-, ethylbenzylamino, monoethylamino-, and p-tolylaminoderivatives are described. Some of the red dyestuffs when treated with fuming sulphuric acid, to convert them into green dye-stuffs, are simultaneously sulphonated, the sulphonated products being more soluble than the unsulphonated dyestuffs.
GB190722818D1907-10-161907-10-16Manufacture and Production of New Dyestuffs of the Phthalein Series Dyeing on a Mordant
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