CS272913B1 - Anticracking additive for soap - Google Patents

Abstract

An anti-cracking additive for soap the essence of which is that it contains alkaline salts of a mixture of aliphatic carboxylic acids and isomerised carboxylic acids and number of carbon atoms from 8 to 22. Soap containing this agent has low crackability, better workability and it maintains its homogeneity even after long storage.

Description

The present invention relates to a soap cracking additive comprising alkali salts of a mixture of aliphatic carboxylic acids and isomerized carboxylic acids.

Dimmer fatty acids are produced by polymerizing non-reducing rapeseed fatty acids. The polymerization is mainly acyclic (about 40%), monocyclic (about 55%) and tricyclic (about 5%) dimer, as well as trimer and higher polymers. In addition, saturated acids (palmitic and stearic acids), unreacted unsaturated acids (especially oleic and elaidic acids), and a mixture of difficult to identify isomerized branched acids (especially Ο ^ θ), which are referred to as isoacid acids, remain unchanged. The crude mixture obtained is then separated to give the following fractions, the so-called monomer, which contains unreacted isomerized acids, a dimer and a distillation residue, which contains a trimer and higher polymers. Dimers find their application especially in the paint and varnish industry, a trimer of which not much is yet combusted and remains the question of what to do with the monomeric acid fraction. It is, of course, possible to construct expensive rectification of the apparatus and to obtain individual fractions of unsaturated, saturated and isomerized acids. However, the distillation capacity for the amount of up to 1 or 2 kt of monomer to be considered is uneconomical.

The monomer fraction contains 30 to 50% of a mixture of palmitic acid and stearic acid, 15 to 25% of a mixture of elaidic acid and oleic acid and 25 to 55% of a mixture of isomeric branched acids. The monomer fraction can be physically adjusted (for example by freeze drying) so that the branched acid isomer content rises up to SO%. The monomer fraction can also be hydrogenated to contain a mixture of saturated aliphatic acids and a mixture of branched acid isomers.

On the other hand, the fat processing industry lacks the soap processing additives, for example plasticizers, which improve the processability of the soap mass and the anti-cracking additives. Soap cracking significantly reduces their utility properties. If soap cracks during use, it wears faster and dirt builds up in the cracks. In extreme cases, the soap is completely broken and disintegrated. There are many causes of cracking and often cannot be specified precisely. Particularly in recent times, when replacing high-quality food fats in the production of soaps with substantially lower quality fats or even waste fats, these undesirable effects need to be avoided.

The aforementioned problems are solved by a soap cracking additive which comprises alkali salts of a mixture of aliphatic carboxylic acids and isomerized carboxylic acids having a carbon number of 8 to 22 in a weight ratio of 20: 1 to 100.

The soap containing the additive according to the invention has a reduced cracking by 2 to 3 degrees. The advantage is also that largely eliminate defects in the composition of grease sticks and potential inaccuracies in soap production technology, which would result in increased surface cracking. The advantage is that the reduction of cracking is achieved by a substance that is close in composition to the soap composition. Another advantage is perfect workability and perfect homogeneity of soap mass. During storage, the active ingredients do not bloom on the surface and thus wash off on first use. Soap retains perfect homogeneity of all ingredients, even during long-term storage and use. The advantages of the soap according to the invention include good dermatological properties. The additive according to the invention is readily biodegradable.

The anti-cracking soap according to the invention can be made on conventional soap plants without any modification. The mixture of branched carboxylic acid isomers is added to the soap batch in the form of acids or, for example, to synthetic soaps directly in the form of the alkali salts.

Table 1 shows the cracking value of the soap without additive compared to the import peak additive (Plastibcl 9) against cracking (contents of 4% and 8%) compared to the soap containing the additive of the invention. Resistance to cracking is evaluated by a commonly used method. Soaps are repeatedly subjected to the processes they undergo in normal use

CS 272 913 B1 use and cracks are evaluated on a scoring scale using photographic standards. The resulting average value, which is a measure of soap cracking, may have the lowest value of 2 and the highest of 10 (soap breaks up completely).

All percentages are by weight unless otherwise stated. The invention is illustrated in more detail by the following non-limiting examples.

Example 1

Soap stick with a composition of 60% beef tallow, 13% coconut oil,% pork fat and 7% monomer fraction (Art. No. 189.3 composition: palmitic acid 22%, stearic acid 20%, oleic acid 21%, branched carboxylic acid isomers acid 37%) is saponified by a conventional batch process using sodium hydroxide solution. The soap obtained is dried to a dry matter content of 80% by weight and to 95.695% by weight. the soap base thus obtained is added with a dosing device of 0.2 wt. % titanium dioxide, 0.005 wt. dye, 2 wt. lanolin, 0.1% butylhydroxytoluene, 2.% weight perfume and continuous technology are processed to homogeneous piece toilet soap. Soap of this composition exhibits better surface cracking resistance (2.8) in use than monomer-free soap in the batch (cracking 6.2).

Example 2

Synthetic soap containing 48 wt. % sodium lauryl sulfate, 10 wt. % sodium palraitic acid, 35 wt. sodium salts of hydrogenated monomers (ref. no. 1.8; ref. no. 192.8; composition: palmitic acid 25%, stearic acid 48%, branched carboxylic acid isomers 27%); 5 wt. % lauric monoethanolamide 0.5 wt. % dye, 1.5 wt. perfume is produced by the classical batch technological process of soap production. Soap of this composition shows higher cleaning ability, lower swelling, lower tendency to surface cracking in use (2.9) and better processability than soap free of hydrogenated monomers (cracking 5.8).

Example 3

Soap stick weighing 40% beef tallow, 20% lard, 15% coconut oil, 20% fishbane, 5% monomer (Art. No. 186.5; composition: palmitic acid 6%, stearic acid 4%, acid oleic 2%, branched carboxylic acid isomers 88%), saponification by a conventional batch soap process. The soap obtained is dried to a dry weight content of 68% and to 98% by weight. the core base thus obtained is added with a feed device of 2% by weight. benzaldehyde and the mixture is processed by continuous technology to a homogeneous piece core soap intended for hand washing. Soap of this composition shows better resistance to surface cracking (3,6) in use than monomer-free soaps in the batch (cracking 8.4). Furthermore, it shows a better washing effect (16%) and a lower swellability (12%) than a monomer-free soap in the batch.

Table 1

Soap cracking values

Soap according to without additive Plastibol 9 according to invention 4% 0% Example 1 6.2 4.0 3.1 2.3 Example 2 5.8 3.9 3.4 2.9 Example 3 8.4 4.2 3.6 3.6

CS 272 913 Bl

Claims (1)

P i? E D MEASURES OF THE INVENTION A soap cracking additive comprising alkali salts of a mixture of aliphatic carboxylic acids and isomerized carboxylic acids having a carbon number of 8 to 22 in a weight ratio of 20: 1 to 100.