CS256525B1 - Defoam and bleach mixture - Google Patents

Abstract

The essence of the defoaming and whitening mixture is the content of 30 to 70% of nonionic surfactant, 0 to 40% of higher fatty acids, 10 to 40% of a mixture of branched olefins and 0.5 to 10% of optical brighteners. The main advantages of defoaming and whitening mixtures are to ensure low foaming of washing and finishing baths in a wide range of temperatures, unlimited shelf life, higher defoaming effect of the mixture compared to its individual components and further in bleaching of powdery substrates and acceleration and increase of brightening effects.

Description

BACKGROUND OF THE INVENTION The present invention relates to antifoaming and bleaching compositions used to reduce foaming of laundry detergents and refining baths either by direct application or as part of laundry or textile auxiliaries. '

The vast majority of detergent and finishing processes require the use of low-foaming baths for technological reasons.

For this reason, suds control agents are added to the laundry and textile auxiliaries, either directly as part of the composition or additionally when applied. Such suds regulators are known and used, for example, soaps of higher saturated fatty acids, higher alcohols, waxes, oils, special nonionic surfactants, melamine derivatives, alkyl phosphoric acid esters, branched olefin silicone antifoams. The bleaching of the treated fabrics is provided by the application of optically brightening agents admixed with the formulation or added directly to the bath.

All of the antifoam agents known to date perform their function separately and only partially. These disadvantages also have the most commonly used soaps and silicones. For example, higher saturated fatty acid soaps are good antifoams even at operating temperatures above 60 ° C, high-performance silicone antifoams are very costly and their stability in storage and in an alkaline environment is not resolved.

Said method of technological application of optically brightening agents often results in a negative coloring of the powder substrates due to their intense color and slows down the brightening process in the bath, which can only occur after dissolution; an optically brightening agent.

The nature of the antifoam and bleaching compositions used to reduce the foaming of washing and quenching baths is that it contains 30 to 70% nonionic surfactants based on oxyethylated fatty alcohols or oxyethylated monoethanolamides of fatty acids or oxyethylene oxypropylene block copolymers or mixtures thereof, 10 to 40% saturated fatty acids Ο θ ^ to C _22, 10-40% of a mixture of branched olefins of carbon number Cg to C ^ _o having a molecular weight from 450 to 1,190 with an average of 1 to 1.5 double bonds per molecule and 0.5 to 10% optically brightening agents.

The main advantages of the antifoam and bleaching composition are to ensure low foaming in washing and refining processes over a wide temperature range, in unlimited shelf life, in a higher antifoam effect of the blend over its individual components, and in bleaching powder substrates as well as accelerating and enhancing brightening effects.

Examples

1. A heated boiler equipped with a stirrer is charged with 46.8% of C ₁₀ to C ₁₀ fatty alcohol with 10 moles of oxyethylene and heated to 55-6 ° C. Was then added 3.2% optical brightener based on coumarin and gradually under stirring 15% saturated fatty acid C to C _{1 g 22nd} After complete dissolution, 35% of a branched olefin mixture having a molecular weight of over 560 is finally mixed.

2. A heated boiler equipped with a stirrer is charged with% of monoethanolamide of rape fatty acids with 10 moles of exyetylene and heated to 55 ° C. Then was added 3.2% of a mixture of optical brighteners based on stilbene derivatives and, while stirred with a Ni slowly sprinkled into the mixture of 25% saturated fatty acids Ο θ ^ to ^C 22 '

AND

After complete dissolution, 13.8% of a mixture of branched olefins having a molecular weight of over 560 is gradually mixed.

... ^f ,

Both examples provide an effective antifoam and bleaching composition applicable to both detergent and refinement compositions and baths.

The efficacy of the antifoam and bleaching compositions is characterized by the following table, indicating the change in the foaming and whiteness levels of a conventional commercial detergent when the various antifoams are mixed with a comparable amount of optically brighteners. .

The foaming was monitored in a Phllco-Pord automatic washing machine with a load of 1.5 kg of clean towels and a detergent concentration of 5 gl ^-1 . Maximum foam height in cm at different temperatures when using detergent indicated as 100%. 100% bleach was labeled for the optical remission of the original detergent detected on the Elrephoroat DFC 5 using a D 65 xenon lamp »

- 4 Table,

1. detergent without addition

2. detergent + 1% ointment soap. of C 1 -C 9 acids

2a.dto this after 9 months of storage

3. Detergent + 1% branched olefin mixture

3a.ditto after 9 months of storage

4. detergent + 1% oxyethylated fatty alcohol (C ₁₈ , 4 moles OE)

4A.This after 9 meters storage

5 * detergent _in + 1% silicone antifoam

5a.ditto after 9 months of storage

6. detergent + 1% of the composition of Example 1

6a.ditto after 9 months of storage

7. detergent + 1% of the composition of Example 2

7A.This after 9 months of storage

Foaming power -% whiteness · ° C 60 ° C 90 ° C 100 ALIGN! 100 ALIGN! 100 ALIGN! 100 ALIGN! 100 ALIGN! 80 60 ioo ioo 80 60 ioo 60 70 80 120 60 70 80 120 80 90 100 ALIGN! Í25 80 90 100 ALIGN! 125 0 5 20 May 105 50 80 100 ALIGN! 105 30 25 60 140 30 25 60 140 60 40 30 150 60 40 30 150

Claims (1)

Anti-foaming and bleaching composition for reducing foaming of washing and quenching baths, characterized in that it contains 30 to 70% non-ionic surfactant based on oxyethylated fatty alcohols or oxyethylated fatty acid monoethanolamides or oxyethylene-oxypropylene block copolymers or mixtures thereof, 10 to 40% saturated fatty acids acids of Ο θ to Cg ₂ , 10 to 40% of a mixture of branched olefins having a carbon number of Cg to ΟΟ θ with a molecular weight of 450 to 1190 with an average content of 1 to 1.5 double bonds per molecule and 0.5 to 10% optically brightening agents. * ·