CS245082B1 - High-concentrated freshening means - Google Patents

Description

The invention relates to a highly concentrated liquid fabric softener with an antistatic and softening effect.

Fabric softeners improve the utility properties of fabrics, ie prevent the formation of electrostatic charge on textiles or allow faster removal, revitalize the appearance, soften the touch and facilitate washability in subsequent washes. They are generally applied in the last rinsing bath to wet washed laundry after removal of anionic surfactant residues from the wash liquor.

Commonly used fabric softeners generally comprise a quaternary ammonium compound of the dimethyldialkylammonium salt type, substituted imidazoline salts and the like and other additives (nonionic surfactant, optically brightener, colorant, perfume). A general disadvantage of said surfactants is their poor dispersibility in water and the formation of viscous gels even at lower concentrations. This property limits the surfactant concentration commonly used in commercial fabric softeners to 5 to 15% by weight.

The above-mentioned disadvantages are solved by a highly concentrated fabric softener with an antistatic and softening effect, characterized in that it contains 40 to 80% by weight of a synergistic mixture of quaternary ammonium salts of the general formulas

CH ₂ CH _from OH

R ¹ C00CH ₂ CH _o- R 'R ² & |

4- ⁽ °.)

X ~

WOCH.CHx-NR ² Ί (II) wherein R ¹ represents a saturated alkyl radical having 8 to 22 carbon atoms or an unsaturated analog thereof, R ^{2 a} methyl or ethyl group, X a methoxy methoxy or ethoxy sulfonyloxy group.

The above-mentioned surfactant (1j) imparts anti-toxic and softening effects to fabrics, the disadvantage is the aforementioned poor water dispersion and the formation of viscous gels.

Use of cationic " only " esters based on amino alcohol esters of formula (H) have been known since the early 1960s. Quaternary salts based on alkyl sulfates of amino alcohols are used. in recipes of Soviet and Polish fabric softeners; for example, Polish patent 116 056 covers the use of a mixture of tris (2-hydroxyethyl) methylammonium methosulfate with an oxyethylated fatty acid.

The aforementioned compound of formula II only imparts a slight antistatic treatment to the fabrics (reduction of the surface resistance of the fabrics by 0.5 to 1 order) and is not involved in fabric softening. However, it is pure water soluble in all proportions.

The above disadvantages of both types of quaternary salts eliminates the use of synergistic mixtures according to the invention in which the compound of formula I and II wherein R ^1, R ² and X are as defined above, are mixed in a ratio of 80: 20 to 20: 80, preferably 70: 30 to 50: 50 (the ratios are by weight).

A mixture of quaternary salts of formulas I and II where R ^1, R ² and X have the abovementioned meanings, can be easily prepared by partial transesterification of triglycerides with triethanolamine followed by quaternization of triethanolamine ester amine and unreacted dialkyl sulfate in an anhydrous environment.

The starting triglycerides can be used either original (untreated) or hydrogenated. Beef tallow, rapeseed or soybean oil may serve as examples.

The synergistic mixture of quaternary ammonium salts of formulas I and II according to the invention is diluted to adjust consistency to facilitate handling and filling on automatic filling lines with primary aliphatic alcohols (e.g. 2-propanol) or polyols (e.g. 1,2-propylene glycol) to a working concentration of 40 Up to 80% by weight, depending on the application, perfume, colorant and optically brightener are added.

Commonly used cationic surfactants can also be dissolved in the above solvents, but at a surfactant concentration substantially lower (e.g., a 70% solution of the substituted imidazoline salt in propylene glycol is pasty. When diluted with water gel formation or flocculation of the surfactant component in cold water.

The mixture according to the invention is comprised of a compound of the formula. II perfectly dispersible even in cold water and can be successfully applied as an aviage. in the last rinse cycle! without previous dilution.

The fabric softener may also be used as a textile fabric auxiliary.

The use of concentrated agents has other advantages: less packaging consumption, less storage space, less demands on goods transport (no water transport), less product volume and thus easier handling, less agent dosing.

A comparison of the properties of the individual components of the fabric softener composition with the synergistic composition of the examples and the commercial fabric softener composition is documented in the table.

The antistatic effect is evaluated according to the surface resistance of the treated fabrics. Surface resistance is determined on a TERALIN III teraohnnetter (Statron, GDR) supplemented with a stainless steel knife probe in the form of parallel 10 cm long blades spaced 0.7 cm apart. The measurement is carried out at a temperature of 20 to 22 ^{° C} and a relative humidity of 60 to 65%.

There is no objective method for evaluating the softening effect. The emollient effect is evaluated subjectively as described [Egan, R. R., J. Am. Oil. Chem. Soc. 55, 118 (1978)] by a group of 5 who evaluate the terry cloth in the palm of their hand and classify them in softness classes on a scale of 1 to 5, where 1 indicates the hardest cloth and 5 the softest.

Untreated cloths and cloths treated with dimethyldistearylammonium chloride, which have an excellent softening effect, classified in softness class 5, are chosen as reference standards.

The table below shows that a significant reduction in viscosity is achieved by using the synergistic mixture <according to Example 1 against the surfactant of formula I alone, while maintaining antistatic and softening effects.

The synergism of the mixture of the compounds of formulas I and II was also verified on the model mixtures according to example 2. It has been shown that even at a ratio of the components of formulas I and II of 50:50 (said ratio by weight) the excellent antistatic and softening effect of the quaternary ammonium salt .

i ·> <·

TABLE

Properties of quaternary salts of formulas I and II and their synergistic mixtures

Sample A quaternary salt (I) (according to Example 1) _ 0.4

60% solution in PG -> I 1,5 quaternary salt (II) i '0,4' (according to example 1) - ₍ 1,5 fabric softener '0,4 (according to example 1): II = 70 : 30 1.5

80% solution in PG fabric softener 0.4 (model, blend according to example 2) 1.5

I: II = 50:50

80% solution in PG fabric softener 0.4 (according to Ex. 2) I: II = 50: 50 1.5

70% solution in PA commercial fabric softener 0.4

60% solution in H2O, 1,5 untreated fabric (.

DOG FALL C D 3,6.10 ¹⁰ 6.1. l £ tt « 1.4 4 4,2.10 ⁸ 8,7.10f 4.1. ΙΟΙ ² 1.3. 1012 0.09 1 3.2. 10 ¹² 1.1. IOI ² 2,7.1Ό ¹⁰ 6,2.101 » 0.39 4 5,4.10 ⁸ 2.6. ΙΟ ¹⁰ 2.1. 101 « 8,3.101 « 0.38 4 4,9.10 ⁸ 3, -2.101 » 4,6.101 » 7,9.101 » 0.14 5—4 3.5. 10 ⁸ 3,4.1O ¹⁰ 3.0 .101 « 9.3. 101 « 0.02 5 2,9.10 « 1,6.101 » 1.5. 10 ¹³ 8,0.1012 - • T

where it represents

A concentration (g 100% active substance per .1 liter solution)

B surface resistance of fabrics (Ohm)

C dynamic viscosity at 25 ° C (Pa s)

D omak

PG 2-propylene glycol PA 2-propanol

Note: the percentages given and the ratios of quaternary salts I and II are by weight.

The following examples illustrate the preparation and composition of a concentrated liquid fabric softener composition having an antistatic and softening effect according to the invention.

Example 1

8,000 kg of a mixture of bis (2-hydroxyethyl) -2-acyloxyethylmethylammonium methoxysulfate (I), where acyl is a residue of rapeseed fatty acids, and tris (2-hydroxyethyl) methylammonium methoxysulfate (II) in a 10 m ³ reactor equipped with a stirrer ratio of components I: II 70: 30 (the ratio is by weight). 1,940 kg of 1,2-propylene glycol was added to the mixture and stirred for 2 hours. Finally, mix 60 kg of perfume. A highly concentrated softener (80% by weight) suitable for rinsing in automatic washing machines is obtained. Detailed specification of the device is in the table.

Example 2

In the same manner as in Example 1, 7,000 kg of a mixture of bis (2-hydroxyethyl) -2-acyloxyethyl-ethylammonium ethoxysulfate (1j), wherein acyl is a soybean oil fatty acid residue, and tris (2-hydroxyethyljethylammonium ethoxysulfate (II) in a ratio of II 50:50 (weight ratio) 2,910 kg of 2-propanol, 80 kg of perfume, 10 kg of optic brightener and 0.1 kg of dye are added to the mixture, after 2 hours of mixing, 10,000 kg of concentrated luxury fabric softener are obtained. device, the specification of which is given in the table.

Claims (1)

Highly concentrated fabric softener with antistatic and softening effect, characterized in that it contains 40 to 80% OF THE INVENTION i by weight of a synergistic mixture of quaternary ammonium salts of the general formulas ch ₂ ch ₂ oh r ¹ cooch ₂ cm ^ A - r ² CH 2 Cl 2 OH (OCH ₂ CH _from OH H ₍ CH ₂ CH ₂ N) R ^x (II) in which R ¹ denotes a saturated alkyl radical of 8 to 22 carbon atoms or an unsaturated analog thereof, R ² denotes an alkyl radical of 1 or 2 carbon atoms and X a methoxy-ethoxy-ethoxy-sulfonyloxy group; a ratio of the components of formulas I: II of 80: 20 to 20: 80, preferably 70: 30 to 50:50, wherein said ratios are by weight, and the fabric softener adds to 100% by weight. primary aliphatic alcohols, for example 2-propanol, or polyols, for example 1,2-propylene glycol.