CS270080B1 - Liquid enzymatic detergent with increased biological activity - Google Patents

Abstract

The solution relates to liquid enzymatic detergents and solves the problem of increasing their efficiency by ensuring high biological activity. The essence of high efficiency is the use of 4 to 35% by weight of nitrilotriacetic acid in the form of ethanolamine salts in addition to 5 to 70% by weight of anionic and nonionic surfactants, 1 to 60% by weight of solvents based on water, ethanol or propylene glycol and 0.001 to 15% by weight of special additives commonly used in detergent formulations. The main advantages of the invention lie in ensuring high enzymatic efficiency of liquid detergents with an economical dosage of the expensive enzyme;

Description

The present invention relates to liquid enzymatic detergents and seeks to increase their effectiveness by providing high biological activity.

While the content of alkaline proteases or amylases in detergents has become quite common in developed countries, liquid biologically active detergents successful on the market are a matter of recent times. Their complex development has resulted in a number of similar products almost simultaneously in the world's leading companies. The application of enzymes has brought the effectiveness of liquid detergents closer to traditional powder formulations, over which it has clear advantages in low energy consumption and higher bulk density.

The reason for the relatively late application of liquid enzymatic detergents was the long-term research dealing with ensuring sufficient activity and stability of the enzymatic component while its economic resistance in detergents. Experience from the production of powdered enzymatic products could not be fully applied, as the situation with the liquid form is completely different. Here it is necessary to take into account the higher amount of water and the content of surfactants, which complicates the stability of the product, resp. application. enzyme components for the washing efficiency corresponding to the applied enzymatic activity.

Stability during storage and high enzyme activity is partially solved in addition to increasing the dry matter content and decreasing the water content when applying solvents using special stabilizers, eg calcium chloride, phosphates, borax, formate, or using ethanolamine salts of anionic surfactants.

The effort for full long-term use of the inserted enzymatic activity, and thus ensuring high efficiency at the lowest possible economic costs, is solved by an always-specific recipe and there are significant differences between individual cases. However, even the most successful examples are not ideal. So far, it has not been possible to apply higher contents, i.e. above 2% by weight, of effective complexing agents without negative effects on the activity of the enzymes. It is the surfactant / complexing agent mixture that is the basis for the high efficiency of powder products. Particularly preferred are substances with high stability constants for calcium ions, e.g. nitrilotriacetic acid, which has a high washing efficiency, higher than other organic complexones of a similar type and additives used in the production of detergents. However, in the liquid form of alkaline detergents, the action of the sodium or potassium salts of nitrilotriacetic acid on the enzyme is very negative.

The invention of a liquid enzymatic detergent composition with increased biological activity composed of anionic and nonionic surfactants, alkaline proteases, solvents and special additives, characterized in that it contains 4 to 35% by weight of nitrilotriacetic acid saturated to the first to of mono- to triethanolamine, 5 to 70% by weight of anionic and nonionic surfactants, alkyl polyglycol ether sulphate or alkyl sulphate or alkylbenzenesulphonate or soap, or a two- to four-component mixture thereof in the form of sodium, potassium or mono- to triethanolamine salts or mixtures thereof, and 0 5 to 15% by weight of oxyethylened fatty alcohols, of the solvents it contains 1 to 60% by weight of water or ethanol or propylene glycol or their two- to three-component mixtures and special additives are 0.001 to 15% by weight of optical brighteners or enzyme stabilizers or substances stable turbidity of liquid compositions or two to five-component mixtures of these substances.

The main advantages of the invention are to ensure a high enzymatic efficiency of liquid detergents in an economical dosing of an expensive enzyme even with a significant content of an effective complexing agent. ’

Exemplary embodiments

By conventional manufacturing methods for preparing liquid detergents, liquid detergents having the composition shown in the table are prepared. The obtained compositions have a high washing efficiency due to the content of nitrilotriacetic acid and enzyme, the activity and storage stability of which is ensured by the use of ethanolamine salts of nitrilotriacetic acid.

CS 270 080 81

Raw material

Example No. 1 2 3

nitrilotriacetic acid monoethanolamine 10 6 25 30 20 diethanolamine 20 triethanolamine _; 10 3.5 sodium alkyl polyglycol ester sulfate 5 sodium alkyl sulfate 2 sodium alkylbenzenesulfonate 6 alkylbenzenesulfonane-diethanolamine salt 6 alkylbenzenesulfonane-monoethanolamine salt 6 oxyethylenated fatty alcohol 6 10 2 1 triethanolamine soap .20 5 monoethanolamine soap. 30 potassium soap 3 perfume 0.25 0.25 0.3 0.2 enzyme stabilizer / borax / 5 7 optically brightening agent based on stilbene 0.2 0.2 0.25 0.3 dye. 0.005 0.001 propylene glycol 3 5 ethanol 10 5 polystyrene based opacifier 1 alkaline protease with an activity of 400 thousand D.j./g. 0.8 1.0 0.7 0.65 water to 100

and Washing capacity / in V - standard soiling ' 40.2 37.8 48.3 51.1 Enzyme stability during storage / 6 months, laboratory conditions / 76 71 83 90

The effect of the invention is further demonstrated by a comparison of the effect of nitrilotriacetic acid on the washing efficiency of surfactants and enzyme (types and weight ratios according to Example 1) and the effect of different types of their trisalts on enzymatic activity and storage stability.

In both cases, the washing efficiency was determined according to the state testing laboratory No. 240. / Washing temperature - 60 ° C, water with a hardness of 1.78 mmol Ca ²⁺ . 1 “^, material-cotton, concentration of washing detergents - 2 gl ¹ t, enzymes + 0.5 gl ¹ nitrilotriacetic acid, dry matter content of samples for storage - 60% /.

CS 270 080 Bl

Washing capacity / in V Enzyme stability at standard soiling enzymatic contamination laboratory storage / in% / / 6 months, conditions Surfactant base 21.0 29.4 75 + NTA-sodium salt 39.8 41.3 52 + NTA-monoethanolamines salt 42.2 45.8 81 + NTA-diethanolamine salt 43.1 47.1 80 + NTA-triethanolamine salt 42.6 45.0 78

OBJECT OF THE INVENTION

Claims (4)

OBJECT OF THE INVENTION A liquid enzymatic detergent composition with enhanced biological activity, composed of anionic and nonionic surfactants, alkaline proteases, solvents and special additives, characterized in that it contains 4 to 35% by weight of nitrilotriacetic acid saturated in the first to third stages with mono to triethanolamine. 2. A liquid enzymatic detergent composition according to claim 1, characterized in that 5 to 70% by weight of anionic and nonionic surfactants are used in anionic and nonionic surfactants or alkylbenzenesulfonate or soap or a two- to four-component mixture thereof in the form of sodium, potassium or mono- to triethanolamine salts. or mixtures thereof and 0.5 to 15% by weight of oxyethylene fatty alcohols. 3. The liquid enzymatic detergent composition according to items 1, 2, characterized in that it contains 1 to 60% by weight of water or ethanol or propylene glycol or mixtures thereof in two of the solvents. 4. A liquid enzymatic composition according to items 1, 2, 3, characterized in that the special additives are 0.001 to 15% by weight of optical brighteners or enzyme stabilizers or substances ensuring a stable turbidity of the liquid compositions or two to five-component mixtures of these substances.