Fluorescent whitening agent formulation
AssigneeCiba Specialty Chemicals Corporation
InventorsPeter Rohringer, Marc Roger Grienenberger
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Abstract
There is described a liquid preparation comprising: a) 10 to 40 % by weight of the fluorescent whitening agent having the formula: ##STR1## wherein M is hydrogen, an alkali metal, ammonium or magnesium; b) 10 to 85% by weight of polyethylene glycol having a mean molecular weight in the range of from 150 to 500; c) 0 to 75% by weight of water; and d) 0 to 20% by weight of one or more auxiliary compounds; each based on the total weight of the liquid preparation. The new formulation is suitable for the fluorescent whitening of paper or detergents, and is stable over a wide range of temperature.
Claims14
A liquid preparation consisting essentially of
- a) 10 to 40% by weight of the fluorescent whitening agent having the formula:
- ##STR3## wherein M is hydrogen, an alkali metal, ammonium or magnesium;
- b) 20 to 70% by weight of polyethylene glycol having a mean molecular weight in the range of from 150 to 500;
- c) 10 to 30% by weight of water;
- and
- d) 0 to 15% by weight in total of one or more auxiliary compounds selected from the group consisting of dispersing agents, protective colloids, solvents for protective colloids, antifreezes, stabilizers, perfuming agents and suquestering agents;
- each based on the total weight of the liquid preparation.
Dependencies are inferred from the claim text.