Improvements in or relating to stilbene-cyanuric compounds

摘要

The invention comprises compounds of the formula wherein M represents hydrogen or an alkali metal, n is 1 or 2, X and 7 each represent hydrogen, methyl or ethyl and Z represents a -CH2COOM group or a CH2CH2-SO3M group. They may be prepared by condensing approximately one mole of 4,41-diaminostilbene - 2,21 - disulphonic acid with approximately 2 moles of cyanuric chloride and the product thereof condensed with 2 moles of a phenolsulphonic acid or alkali metal salt thereof and then with 2 moles of either taurine, N-methyl taurine, N-ethyltaurine, glycine, N-methyl glycine or N-ethylglycine or by methods wherein the order of the above condensations differs from that stated above.ALSO:Cellulosic and keratinous materials and nylon are treated with brightening agents of the general formula wherein M represents hydrogen or an alkali metal, n is 1 or 2, X and Y each represent hydrogen, methyl or ethyl and 2 represents a -CH2COOM group or a -CH2CH2SO3M group. In an Example cotton is treated with an aqueous solution of 4,41-bis [4-(N-methyl-N-2- -sulphoethylamino)-6-p sulphophenoxy-s-triazine- -2-ylamino] -2,21-stilbenedisulphonate and an aqueous suspension of a cationic synthetic softening agent. Other examples relate to the incorporation of said brightening compound in a clay coating of paper and, together with rosin size, in a bleached sulphite paper pulp prior to paper making. Specified keratinous materials are wool and casein.ALSO:Clay coatings on paper contain brightening agents of the general formula wherein M represents hydrogen or an alkali metal, n is 1 or 2, X and Y each represent hydrogen, methyl or ethyl and Z represents a -CH2COOM group or a -CH2CH2SO3M group. In an example a coating composition was made consisting of 80 g. clay, 20 g. calcium carbonate, 4 g. of a commercially available latex and 66,3 c.c. of a casein solution, which solution was made by mixing 166 g. casein, 47,7 c.c. conc. ammonium hydroxide and water to 1 l. The composition was diluted with water to 250 g. and 1 g. of sodium 4,41-bis[4-(N-methyl- N -2-sulphoethylamino)-6- p -sulphophenoxy-s-triazine-2-ylamino]-2,21-stilbene disulphonate added prior to coating paper with 20% by weight of the final formulation.