CS239736B1 - Optically brightening agent for restoring the whiteness of old stiffening curtains - Google Patents

Abstract

A household care product for washed curtains, consisting of 10 to 70% by weight of polyethylene glycol with a molecular weight of 600 to 6,000, up to JO% of glycerin, another alcohol with at least 2 hydroxyl groups or liquid polyglycols, 10 to 80% ethanol or isopropanol, up to 30% water, 0.2 to 10% optical brightener and up to 2% perfume.

Description

Curtains turn yellow and gray over time and it is therefore desirable to restore their original snow-white appearance. At present, they are predominantly made of synthetic material (polyamide and polyester fibers), in which bleaching is poorly effective as the aging process takes place throughout the mass.

Optical brightening is ineffective under household washing conditions. It is therefore desirable to have an optical brightening process that can also be applied in the home.

The problem can be solved when the optical brightener in solution is stretched onto the excipient, which is then impregnated with the curtain. This also achieves the desired stiffening effect.

For this purpose, polyvinyl acetate is used in the GDR - Wofena - Gardinenpflege product.

In BE - Pat. No. 821,550 discloses natural starch, Mg- and / or Ca-soaps of fatty acids and carboxymethyl starch.

DAS Pat. No. 2,834,224 proposes polyvinyl alcohol, acrylamide polymers, ester copolymers and modified polyvinyl alcohols.

In DAS - Pat. 2,256,194 are still proposed mixed cellulose esters.

It has now been found that both starch and its derivatives as well as carboxymethyl cellulose in various modifications can be used as excipients. However, a much higher effect is achieved with polyethylene glycol and polyhydric alcohols.

SUMMARY OF THE INVENTION The present invention relates to a composition for restoring the whiteness of old curtains with a mild stiffening effect consisting of 10 to 70% by weight of polyethylene glycol per mole. wt. 600 to 6000, up to 30% glycerin, another alcohol having 2 or more hydroxyl groups or liquid polyglycols, 10 to 80% ethanol or isopropanol; water, 0.2 to 10% of an optical brightener such as Rylux PRS-supra or similar OZP, up to 2% of a suitable perfume.

The composition according to the invention is on a different raw material basis than the prior art compositions. The brightening effect is higher and can therefore be applied at a lower concentration than the prior art compositions.

Compared to the foreign composition we had, the same brightening effect was achieved when the composition according to the invention was applied at a concentration 5 times lower than the comparable product.

The product is perfectly washable and the impregnation can be restored to its original extent after each wash. The polyethylene glycol film which is the carrier of the optical brightener is colorless and perfectly translucent, so that only the brightening effect of the optical brightener is optically applied.

To illustrate the invention, the following examples are provided:

Recipe no.

50.0 wt.

5.0 wt.

42.0 wt.

2.6 wt. 0.4 wt.

pplyethylene glycol mol. Synthetic alcohol glycerine

OZP / Rylux PRS - supra of suitable perfume

000

Recipe δ. 2: 35.0 wt. polyethylene glycol mol. wt. 1,500 8.0 wt. polyethylene glycol mol. wt. 300

55.0 wt. synthetic alcohol 1.4% wt. OZP / By lux PRS - supra 0.6% wt. suitable perfume

Recipe 2. 3 · '55.0% wt. polyethylene glycol mol. wt. 1,000 6.0 wt. glycerine

34.0 wt. synthetic alcohol 4.2% wt. OZP / Rylux PRS - supra 0.8% wt. suitable perfume '

PEG is charged to the reaction vessel. Rylux is mixed with glycerine to a homogeneous suspension. This suspension is added to the present PEG. The drier is heated on a water bath until a homogeneous solution is formed. After removal from the bath and cooling to 60 ° C, alcohol is added under stirring and the last perfume is added. After homogenization, the solution is filtered at 30-35 ° C. There shall be no loss of alcohol during filtration.

For use, the composition is dissolved in lukewarm water in a ratio of 1:20 to 1:50, depending on the desired brightening effect. Washed and drained, still damp curtains are impregnated in this bath for about 10 minutes while moving. The curtains then hang without sucking.

Claims (1)

SUBJECT OF THE INVENTION An ophthalmic brightener composition for old stiffening curtains comprising from about 10% to about 70% polyethylene glycol having a molecular weight of from about 600% to about 6,000% to about 30% glycerol, another alcohol having at least two hydroxyl groups, or liquid polyglycol. 10 to 80% ethanol or isopropanol, up to 30% water, 0.2 to 10% optical brightener and up to 2% perfume.