JPH0519587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to aqueous liquid compositions of fluorescent whitening dyes.

"Conventional technology" Formula (1) (In formula (1), M represents sodium or potassium) 4,4'-bis(2-o-toluidino-4-morpholino-S-triazin-6-ylamino)stilbene-2,2'-disulfone For example, the sodium salt or potassium salt of an acid is
17616. This product is mainly added to detergents and used for the purpose of optically whitening the fibers at the same time as washing the fibers. Fluorescent brighteners are also used to increase the whiteness of detergents themselves. It is preferable that the fluorescent whitening agent is liquefied for the purpose of not creating dust during the process of blending the fluorescent whitening agent into the detergent, or to facilitate measurement and transportation.

Since the dye of formula (1) is extremely difficult to liquefy in water, for example, in Japanese Patent Publication No. 52-6299, the NaCl content contained in the dye product was reduced to 0.03 to 0.3% to increase the activity of polycarboxylic acid type polymers. A method of adding an agent and making it into fine particles by mechanical method, or Japanese Patent Publication No. 52-8852
In this method, a formalin cocondensate of cresol-sulfonic acid and naphtholsulfonic acid is added to the dye, and then the dye is made into fine particles by a mechanical method. Other commonly used nonionic surfactants such as polyoxyethylene alkyl ether,
Polyoxyethylene alkyl phenol ether (50 moles or less of added ethylene oxide), etc.
Alternatively, simply adding an anionic activator such as a formalin condensate of sodium β-naphthalenesulfonate or alkylbenzenesulfonate salts to the fluorescent whitening dye of formula (1) cannot produce a fluid aqueous liquefaction, and mechanical Processing is essential.

"Problems to be Solved by the Invention" It is desirable to develop a liquid composition of the fluorescent dye of formula (1) that maintains a sufficiently stable liquid state without mechanical treatment prior to blending into a detergent. It is rare.

"Means for Solving the Problems" The present inventors have conducted extensive studies to obtain a stable, thick, low-viscosity aqueous liquid composition of the fluorescent dye of formula (1), and as a result, have arrived at the present invention. It is. That is, the present invention is capable of producing low-viscosity fluorescent dyes of formula (1) without mechanical treatment by mixing the fluorescent dye of formula (1) with polyoxyethylene alkyl phenol ether having an ethylene oxide addition mole number of 50 or more. It is an aqueous liquid that is mixed into detergents and has an excellent chemical whitening effect on the detergent itself and fibers. In addition, since it is liquefied, there is no dust and it is easy to measure.
Easy to transport. It is completely surprising that the liquid composition of formula (1) can be obtained without mechanical treatment only when the number of moles of ethylene oxide added is 50 or more among polyoxyethylene alkyl penol ethers. This was completely unexpected from the known techniques as described above.

In the polyoxyethylene alkyl phenol ether used in the present invention, the alkyl has 7 to 10 carbon atoms, preferably 8 or 9 carbon atoms, and the number of moles of ethylene oxide added is 50 moles or more, and 70 to 100 moles. Moles are preferred.

The composition of the present invention can be prepared by simply adding polyoxyethylene alkyl phenol ether to the fluorescent dye of formula (1) and water in an amount of 0.1 to 30%, preferably 1 to 10% (wt%) of the composition. It can be obtained by a simple operation such as stirring until the

The fluorescent dye of formula (1) used above may be either a water-containing cake or a dry product, but a water-containing cake is usually used. Furthermore, the presence of salts in the water-containing cake produced by conventional methods does not pose an obstacle in preparing the composition of the present invention. Further, after mixing the fluorescent dye of formula (1) and polyoxyethylene alkyl phenol ether, a homomixer or the like may be used to accelerate liquefaction.

"Effects of the Invention" The aqueous liquid composition of the fluorescent dye of formula (1) of the present invention can be prepared without skipping the step of micronization by mechanical treatment, and this composition is stable over time. It also has a great chemical whitening effect on detergents and fibers when added to detergents.
In addition, since it is liquefied, it does not generate dust when added to detergents, and is easy to handle, such as measuring and transporting.

"Examples" The present invention will be specifically described below with reference to Examples.

Unless otherwise noted, parts refer to parts by weight.

Example 1 Water was added to a fluorescent dye of formula (1) in which M is Na, 467 parts of wet cake (containing 200 parts of dry product), and 40 parts of polyoxyethylene nonyl phenol ether with an added mole of ethylene oxide of 50 moles. the whole amount
The mixture was adjusted to 1000 parts and stirred uniformly to obtain an aqueous liquid.
This aqueous liquid had excellent properties such as low viscosity, no gelation, and no precipitation of crystals, and these physical properties were not impaired even after long-term storage.

Example 2 Wet cake containing 230 parts of dry powder of this dye
Water was added to 587 parts and 40 parts of polyoxyethylene nonyl phenol ether containing 100 moles of added ethylene oxide to make the total amount 1000 parts, and the mixture was uniformly stirred to obtain an aqueous liquid. This aqueous liquid was excellent in terms of viscosity, gelation, crystal sedimentation, etc., and these good physical properties were not impaired even after long-term storage.

Example 3 10 parts of polyoxyethylene nonyl phenol ether with an added mole of ethylene oxide of 85 moles was added to 990 parts of the reaction-completed liquid (containing 67 parts of dry product) containing the fluorescent dye of formula (1) in which M is Na. An aqueous liquid was obtained by uniform stirring. This aqueous liquid had excellent physical properties such as viscosity, gelation, and crystal precipitation.

Example 4 Fluorescent dye wetcake of formula (1) where M is K
470 parts (contains 200 parts of dry product), add water to 50 parts of polyoxyethylene octyl phenol ether with 60 moles of ethylene oxide added to make a total of 1000 parts.
1 part and mixed uniformly to obtain an aqueous liquid. This product had excellent physical properties such as viscosity, gelation, and crystal sedimentation, and these properties did not deteriorate even after long-term storage.

Application example 1 Add 80 parts of water to 100 parts of a detergent based on sodium alkylbenzene sulfonate, heat to make a slurry, add 2 parts of the aqueous liquid composition obtained in Example 1, mix well, and heat at 100°C to 120°C. By drying, it was possible to obtain a detergent with high base whiteness.

Application Example 2 An aqueous solution with a concentration of 3% was prepared using an alkylbenzenesulfonic acid-based detergent containing 1 part of the aqueous liquid composition obtained in Example 2, and a cotton gold cloth was placed in this aqueous solution at a bath ratio of 50:1. It was treated for 15 minutes, washed with water, and then dried. The cotton gold band that had been treated in this way had extremely high whiteness.

Comparative Example 1 Wetcake 436 of dye of formula (1) where M is Na
(Contains 174 parts of dry product), 40 parts of polyoxyethylene nonyl phenol ether with 35 moles of ethylene oxide added, water was added to make 1000 parts, and the mixture was stirred, but the liquid did not become homogeneous and had high viscosity and fluidity. It was solid with no grain.

Claims (1)

[Claims] 1 Sodium or potassium salt of 4,4'-bis(2-o-toluidino-4-morpholino-S-triazin-6-ylamino)stilbene-2,2'-disulfonic acid and 50 or more moles of ethylene oxide added An aqueous liquid fluorescent whitening dye composition containing polyoxyethylene alkyl phenol ether.