| 摘要 |
Storage-stable conc. free-flowing aq. dispersion compsn. comprises (a) 2.5-50 wt.% of at least 1 colorless carbonless duplicating dyestuff precursor (I); (b)0.1-30 wt.% of at least 1 surface active agent (II); and (c)water. (I) is a phthalide, phenothiazine, fluoran, arylsulphonyl methane, furo-pyridinone or amphoteric. Compsn. further comprises (1) up to 10 wt.% (di)ethylene glycol, propylene glycol and/or ethylene glycol monoethyl ether; and/or (2) up to 3 wt.% triethanolamine, Na carbonate and/or K carbonate. Pref. the dyestuff precursors are phthalides contg. 33-38% 3,3-bis(4-dimethyl aminophenyl)-6-dimethyl-amino phthalide, 7-10 wt.% Na salt of N-cyclohexyl-N-palmitoyl tartrate and water.
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