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Polyvalent metal salts of 7-hydroxy-8- p-(phenylazo)phenylazo!-1, 3- naphthalenedisulfonic acid for dyeing fiberglass
Polyvalent metal salts of 7-hydroxy-8- p-(phenylazo)phenylazo!-1, 3- naphthalenedisulfonic acid for dyeing fiberglass
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机译:用于玻璃纤维染色的7-羟基-8-对-(苯基偶氮)苯基偶氮!-1,3-萘二磺酸的多价金属盐
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摘要
Dyes of the formula: ##STR1## WHEREIN M is a metal selected from the group consisting of calcium, barium, strontium, magnesium, chromium, manganese, iron, cobalt, nickel, copper, and zinc and wherein n is an integer selected from 2 and 3 are superior dyes for the dyeing of fiberglass in that they are resistant to crystal growth in dye pastes and recycle process water in the dyeing of fiberglass thus, in the spray dyeing of the fiberglass the dyes do not tend to clog the nozzle of the spraying device as do the corresponding salts of monovalent metals, such as the disodium and dipotassium salts.
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