CS206349B1 - Liquid cleaning aims for the hard surfaces - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a hard surface cleaning liquid composition. In hard powdered form, the hard surface cleaning composition typically contains an abrasive component such as silica, pumice, calcium carbonate, ground glass, carborundum, and the like. Swiss Patent No. 420451 discloses, for example, the requirement that all suspended particles pass through a sieve with a mesh size of 104 µm and 80% of the particles through a sieve with mesh size of 53 µm. insoluble abrasive material having a different hardness can be selected depending on the purpose. In addition to the insoluble particles, these cleaning agents contain surface-reducing agents and wetting insoluble particles n dissolving grease and removing impurities. e.g., ionic and aeionic surfactants such as soaps, substituted benzenesulfonates (U.S. Patent Application No. 1,767855, British Patent No. 1,411463 and Japanese Patent No. 77409), fatty acid sulfates (Belgian Patent No. 832713) or Jbjich sodium and potassium salts, as well as ethylene oxide condensates, etc. Very often, inorganic salts such as sodium or potassium carbonate, phosphates, ammonium salts or hydroxides are also used (Swiss Patent No. 578045). Most of these formulations also contain additional ingredients such as antibacterials, bleaching agents, sequestering agents and fragrance compositions.

In the case of a liquid detergent, the particles must be insoluble in a stable suspension. This is achieved by means of high molecular weight substances such as synthetic oelulose derivatives of a certain degree of substitution (German Patent Nos. 420450 and 420451) or natural saliva (Japanese patent application). However, a mild increase in viscosity is often not sufficient to ensure the stability of the suspended particles, but too high a viscosity is detrimental to the application properties. Modified clays and bantonite are preferred (Swedish Patent No. 7,409703, published German patent application no. 2,448502) which, after swelling in water, impart thixotropic properties to the suspension at a rate of

206 349 shear deformation not only by the function of the tangential stress but also by the duration of the stress. The auxiliary used are substances such as kaolin or colloidal silicon dioxide, which binds some of its surface with its surface. Tests have shown that the suspension of insoluble part is colloidal although silica, finely ground calcium carbonate or silica sand with 16 bentonite exhibits thixotropic properties, the viscosity of the suspension is not high enough to remain stable for an unlimited period of time.

The above-mentioned drawbacks are eliminated with the detergent composition according to the invention which comprises 0.5 to 1.0 parts by weight of sodium bentonite to 40 to 60 milligrams of sodium per 100 g of bentonite, further 3.0 to 7.0% by weight. parts of colloidal silicon dioxide, 6.0 to 10.0 parts by weight of coconut diethanolamide having a fatty acid / diethanolamide ratio of 2 to 30.0 to 50.0 parts by weight of water-insoluble substances such as calcium carbonate or alkaline aluminum silicate. or silica, 0.1 to 0.3 parts by weight of an antibacterial additive which is dlhydroxi-hexa-chloro-diphenylmethane or carboxy-pentadeoyl-triaethylammonium bromide or 2-bromo-2-nitro-propanediol 1,3 or 50 Other aqueous lauryl- dimethyl benzylammonium chloride and 30.0 to 60.0 parts by weight of water.This suspension has unlimited stability of the suspended part while maintaining sufficient fluidity of the composition which is This is due to the thixotropy of the suspension, the measure of which is represented by a rheogram (see FIG. 1), expressing the relationship between the tangential stress and the shear rate.

Of the substances which were found to be suitable for increasing the viscosity without disturbing the desired rheological properties of the suspension, coconut diethanolamide in an amount of 6 to 10% based on the weight of snspsnse was found to be most suitable. Using this surfactant, the bentonite concentration could be reduced to a value of 0.5-1.0 µm, depending on the insoluble abrasive particles used, as shown in the examples below.

Preferred is the use of a natrified bentonite which contains 40 to 60 milligrams of sodium per 100 g of bentonite. As has been shown, the suspensions with the bentonite to be treated are more stable for a longer time than when using bentonite without Stispehse-free bentonite. The combination of colloidal silicon dioxide, alumino-soda-barium silicate, natrified bentonite and coconut diethanolamide provides a suspension of unlimited duration.

The size of the insoluble part in the suspension is determined by the limit values t 0.5% the part has a size in the range of 0; 4 and < 5 > and a minimum of 60 part is passed through a 0.04 mm sieve. 2 shows the amount of particles in the mesh which pass through a sieve of mesh size in mm.

Example 1

To 10.0 parts by weight of water, 0.6 parts by weight of natri- fied bentonite is introduced and, after proper mixing, does not stand for 24 hours. 43.0 parts by weight of water, 0.2 parts by weight of dihydroxy-hexachlorodiphenylmethane and 0% by weight are added. To this suspension, 34.0 parts by weight of calcium carbonate according to fiSK 721252 and particle sizes are added to the suspension, with constant stirring and in small portions. 0,5 mm,

5.0 parts by weight of colloidal silica and 1.0 parts by weight of titanium dioxide. The mixture is perfectly homogenized and passed through a 0.5 mm sieve.

Example 2

To 20.0 parts by weight of water, 0.8 parts by weight of natri- fied bentonite is introduced and mixed. After 24 hours, 20.0 parts by weight of water, 0.2 parts by weight of lauryl-dimethyl-benzylammonium chloride and 0.2 parts by weight of bentonite are added. After stirring, 10.0 parts by weight of coconut diethanolamide were added. With constant stirring, 42.0 parts by weight of sodium potassium potassium silicate and 7.0 parts by weight of colloidal silica were added to the mixture. pushes through the alto with a mesh size of 0.5 mm.

The rheological properties of the masses are shown in the reogrameoh in Fig. 1, where the mass curves of Example 1 are shown with a dotted line and the mass curves of Example 2 with a solid line.

Curve 2.1 is the first measurement from low to high

Curve 2.2 is an instantaneous measurement from higher D _y to lower

Curve 2.3 is measured after 1 hour at rest from low D _y to higher

Curve 2.4 is an instantaneous measurement from higher D _y to lower.

Claims (1)

SUBJECT OF THE INVENTION Liquid hard surface cleaning agent in the form of a liquid stable suspension based on water-insoluble abrasive particles, clay and fatty acid alkanolamide, characterized in that it contains 0.5 to 1.0 parts by weight of sodium bentonite with 40 to 60 milligrams of sodium per 100 g of bentonite, 3.0 to 7.0 parts by weight of colloidal silicon dioxide, 6.0 to 10.0 parts by weight of coconut diethanolamide having a molar ratio of fatty acid to diethanolamide of 1: 2, 30.0 to 50.0 parts by weight of water-insoluble abrasive particles, such as calcium carbonate or silicon dioxide, or alkaline sodium-potassium potassium silicate, the particle size of which is aax. 0.5 mm and at least 60% of the particles pass through a 0.04 mm sieve, 0.1 to 0.3 parts by weight of an antibacterial additive such as dihydroxi-hexachlorodiphenylmethane or carbozypentadecyl-trimethylaaonium bromide or a 50% aqueous lauryl solution dimethyl benzylammonium chloride, and 30.0 to 60.0 parts by weight of water.