CS240376B1 - Liquid mixed nionic tenzide determined for washing and cleaning pastes - Google Patents

Description

The present invention relates to a mixed anionic surfactant intended primarily for the preparation of washing and cleaning pastes. '

Washing and cleaning pastes are technical mixtures of surfactants, mostly with an abrasive admixture of organic origin, eg sawdust or inorganic origin, eg pumice. In some cases, these formulations contain small amounts of adjuvants which either reduce adverse dermatological effects, e.g., thickeners, or have beneficial organoleptic properties, e.g., perfumes.

Specific requirements are placed on the surfactant component, which has a decisive influence on the physicochemical effects of the soil removal process. The surfactant must not have a negative effect on the skin, it must have favorable organoleptic properties (consistency, color, odor). The most common disadvantage of the surfactants used is their increase in efficiency at the expense of shifting the pH to a strongly alkaline region.

Liquid surfactants are most suitable for material handling, both by the surfactant manufacturer and the processor, allowing to further increase the abrasive component while maintaining the pasty consistency of the washing paste. The use of organic solvents to adjust the consistency of surfactants is another drawback of the liquid surfactants used. The choice of solvents which are dermatologically safe and non-flammable is considerably limited. In addition, the solvents used contribute much less than the surfactant component to the washing and cleaning performance.

It has now been found that the above-mentioned disadvantages are overcome by the liquid mixed anionic surfactant of the present invention, which is predominantly intended for the preparation of washing and cleaning pastes containing from 2 to 20% by weight of a sulfated aliphatic alcohol salt of the formula

R-O-SO ₅ "X + wherein R is alkyl, alkenyl, alkandienyl 8 to 20, preferably 12 to 18 carbon atoms in the chain, X ⁺ is a monovalent alkali metal cation or ammonium cation or ethanolamine cation, or mixtures thereof up to 30% of alkylarylsulfonic acid salts of the formula

R EHD-SO 3 X ⁺ wherein R is alkyl of 2 to 16, preferably 12 carbon atoms in the chain, X ⁺ is a monovalent alkali metal cation or ammonium cation or ethanolamine cation, preferably triethanolamine or mixtures thereof, and 12% salts of alkyl polyglycol ether sulfate of the general formula

R - (CH 2 CH 2 O) O-SO 3 -X + wherein R represents an alkyl, alkenyl of from 8 to 24, preferably. 12 to 15 carbon atoms in the chain, n is 2 to 10, preferably 2 to 6, and X ⁺ is a monovalent cation of an alkali metal, optionally an ammonium cation, or an ethanolamine cation, or mixtures thereof, with the possible addition,

0.2 to 5% of amphoteric surfactants based on alkyl betaines of the general formula

CHs

R = N ^{+ -} CH ² COOI

CH 2 wherein R represents alkyl, alkenyl, alkanedienyl of 8 to 20 carbon atoms in the chain and 40 to 89% of water.

An advantage of the mixed liquid anionic surfactant according to the invention is the high washing and cleaning ability compared to the surfactants produced so far, due to the action of the salts of alkyl sulfate, alkyl polyglycol ether sulfate and alkylarylsulfonates. Favorable dermatological. the effects are increased by the use of a higher proportion of ethanolamine salts. A further advantage of the inventive mixed surfactant is its fluid consistency at normal temperatures even without the addition of solvents, which has the advantage of eliminating the hazards associated with the processing of combustibles (ethanol, isopropyl alcohol, monopropylene glycol) at the manufacturer, during transport and at the processor. The fluidity at normal temperatures is maintained at the same content of active substances as the solvent types produced so far. Liquid consistency facilitates material handling at the manufacturer, shipper and processor, reduces energy handling requirements for material handling and, moreover, allows increased abrasive components in detergents and cleaners. In addition, amphoteric surfactants, e.g. In the examples below, a part or percentage is understood to mean all parts or percent by weight.

Example 1

A neutralization boiler, which is dyed with a stirrer and indirect cooling, is charged with 622 parts of an aqueous solution containing 40 parts of sodium hydroxide and 32 parts of triethanolamine. To the present solution is admixed sequentially or concurrently with 54 parts of the alkylsulfate from which the absorbed hydrogen chloride prepared by conventional sulfation of a mixed C12-18 aliphatic alcohol with the chlorosulfonic acid chain and 174 parts of dodecylbenzene sulfonic acid prepared by continuous sulfonation of dodecylbenzene with SO3 is blown. The maximum neutralization temperature is 60 ° C. After adjusting the pH to 7.5 to 8.5, the resulting semi-240376 boil is homogenized by mixing with 150 parts of a 30% aqueous solution of C12 to C18, sodium alkyl tetra-ethylene glycol ether sulfate.

1000 parts of a liquid mixed anionic surfactant are obtained which contains 65.5 why. water, with a favorable dermatological effect.

Example 2

A neutralization boiler equipped with a stirrer and indirect cooling is charged with 617 parts of an aqueous solution containing 20 parts of sodium hydroxide and 100 parts of a technical mixture of diethanolamine and triethanolamine containing 85% triethanolamine.

54 parts of the alkyl sulfate from which the absorbed hydrogen chloride prepared by the conventional method described in Example 1 and 174 parts of technical dodecylbenzene sulfoacid were blown were added to this present solution simultaneously or simultaneously. The maximum neutralization temperature is 60 ^° C after adjusting the pH to 7.4-8.6 and the semi-finished product is homogenized by mixing with 150 parts of a 30% aqueous solution of C 6 to C 18 alkyltetraethylene glycol ether sulfate and 5 parts of a 30% aqueous solution of lauryl betaine.

1000 parts of a liquid mixed anionic surfactant containing 60.5 why are obtained. water with a favorable dermatological effect.

Claims (2)

Subject Liquid anionic surfactant, intended primarily for the preparation of washing and cleaning pastes, characterized in that it contains by weight 2 to 20% of a salt of a sulfated aliphatic alcohol of formula R-O-SO-X ⁺ wherein R is alkyl, alkenyl, alkandienyl 8 to 20, preferably 12 to 18 carbon atoms in the chain, X + is a monovalent alkali metal cation or ammonium cation or ethanolamine cation or mixtures thereof; 8 to 30% of alkylarylsulfonic acid salts of the formula R EHD-SO3X ⁺ wherein R is alkyl of 2 to 16, preferably 12 carbon atoms in the chain, X ⁺ is a monovalent cation · alkali metal or ammonium cation or ethanolamine cation, preferably triethanolamine or mixtures thereof, the invention f1 up to 12% of the alkyl polyglycol ether sulfate salts of the formula R - (CH 2 CH 2 O) -O-SO 3 -X ⁺ wherein R is alkyl, alkenyl of 8 to 24, preferably 12 to 15 carbon atoms in the chain, n is 2 to 10, X ⁺ is a monovalent alkali metal cation or ammonium cation and / or an ethanolamine cation, optionally mixtures thereof, and 40 to 89% water. 2. A liquid mixed anionic surfactant according to claim 1 comprising: 0.2 to 5% of amphoteric surfactants based on alkyl betaines of the general formula CH3 R = N + -CH2COO Where R is alkyl, alkenyl, alkanedienyl of 8 to 20 carbon atoms in the chain.