CS267624B1 - An effective component of the tannery liqueur preparation and the method of its production - Google Patents

Abstract

The purpose of the solution is to obtain a tanning preparation that simultaneously has a filling effect. The stated purpose is achieved by an active ingredient of a tanning preparation that contains an addition product of sulfated ricinoleic acid with a protein hydrolysate condensate and a content of 3 to 6 amino groups in the protein hydrolysate molecules with oleyl chloride. A mixture containing 30 to 70% by weight of rapeseed oil and 70 to 30% by weight of castor oil is sulfated with sulfuric acid in a weight ratio of 4:1 to 4:1.3 at a temperature of 35 °C to 40 °C, after which, after washing and neutralizing to pH 6.8 to 7.5, the sulfated mixture is added to the oleyl chloride condensate of the protein hydrolysate and 3 to 6 amino groups in the protein hydrolysate molecules, at a temperature of 40 °C to 45 °C.

Description

The invention relates to an active ingredient of a tanning composition with a filling effect and to a process for its production.

When liquefying leather, various liqueur preparations are used, which provide leather with different softness. When using a higher amount of liquidation preparations alone above 7 by weight, based on the weight of the leather served, with a significant emollient effect. , which is a tanning defect manifested by the bending of leather by rough wrinkling. The cause of this phenomenon lies in the different physical properties of the papillary and reticular layers of the leather, with the quality of their interface being decisive. This interface can be positively influenced by the use of fillers, i.e. substances which can be deposited in said interface and thus prevent the formation of free face, or substantially reduce this free face formation. At present, there is no product available that can achieve both emollient and filling effects.

The object of the invention is to provide a liquefying composition 3 with a filling effect and a method for its production. This object is achieved by the active ingredient of a tannery liqueur preparation, the essence of which consists in that it contains the addition product of sulfated castor oil acid 3 with a condensate of protein hydrolyzate containing 3 to 6 amino groups in the molecules of protein hydrolyzate and oleyl chloride.

The active ingredient is prepared by the process according to the invention in that a mixture containing 30 to 70% by weight of rapeseed oil and 70 to 30% by weight of castor oil is sulfated with sulfuric acid in a weight ratio of 4: 1 to 4: 1.3 at a temperature of 35 °. C to 40 ° C, after which, after washing and neutralization to pH 6.8 to 7> 5, the sulfated mixture is added, with an oleic chloride condensate of protein hydrolyzate with 3 to 6 amino groups in protein hydrolyzate molecules, at a temperature of 40 ° C to C.

The coating composition with the active ingredient according to the invention has a higher stability in the aqueous emulsion in which it is applied, improves biodegradability, resistance to hydrolysis and is resistant to hard water up to 15 ° C (German) hardness. It has a higher emollient effect and has a filling effect which prevents the formation of a free face, in comparison with sulfated oils without protein hydrolyzate condensate. "

In a simple and economical production process, the fatty acid carboxyl is modified with amino groups from the condensate of the protein hydrolyzate, with sulfated amides having better utility properties than sulfated esters in terms of hydrolysis and hard water treatment. Sulfated amides are also Wrench emulsifiers.

The essence of the invention is further elucidated by means of exemplary embodiments.

Example 1

A mixture of oils consisting of 5 parts by weight of rapeseed oil and 50 parts by weight of castor oil is sulphated with 25 parts by weight of sulfuric acid at a temperature of 35 to 40 ° C for 2 hours. After the addition of sulfuric acid, the sulfated mixture is stirred for a further 4 hours. After cooling to 35 DEG C. ^ae technical mixture suloesterů admitted to the wash solution composed of: 80 parts by weight of water, 10 parts by weight of NaOH, 9 parts by weight of crystalline sodium sulphate g After 15tl minutes of stirring the mixture was allowed to separate for 12 hours. The separated sulfoesters are partially neutralized with ammonia to pH 6.9-7.0, 20 parts by weight of a condensate of protein hydrolyzate with oleyl chloride are added and the mixture is stirred at 40 DEG C. for 30 minutes, after which it is neutralized to pH 7.3 by the addition of ammonia. The product obtained is a clear, yellow-brown viscous liquid which is very emulsifiable in water. The pH of the 10% emulsion is 7.2. They are characterized by high stability and resistance to hard water.

CS 267624 Bl

Example 2 parts by weight of rapeseed oil and 70 parts by weight of castor oil are filtered at 35 DEG-38 DEG C. As in Example 1. 25 parts by weight of protein hydrolyzate condensate are added to the neutralized sulfoesters and stirred at 40 DEG C. with stirring for 1 hour. hours gives a clear light brown product, which is characterized by stability in hot and cold water and good emulsifiability. The pH 10 of the emulsion is 7.1 to 7.3.

Example 3

A mixture consisting of 60 parts by weight of rapeseed oil and 40 parts by weight of castor oil was sulfated under the conditions described in Example 1. To the partially neutralized sulfoesters, 30 parts by weight of protein hydrolyzate condensate was added and the mixture was reacted at 40 ° C for 1 hour. Slow addition of ammonia clarifies the product, which has a pH of the emulsion of 7.0 to 7.2. Final product It is a clear viscous, yellow-brown liquid, stable in hot and cold water.

Example 4

A mixture consisting of 70 parts by weight of rapeseed oil and 30 parts by weight of racin oil is sulfated as in Example 1. Neutralization of the sulfoesters is carried out with amino alcohols, preferably diethanolamine or triethanolamine to pH 6.8. After the addition of 20 parts by weight of the protein hydrolyzate condensate, the subsequent reaction and procedure according to Example 1 gives a clear, light brown viscous product, characterized by high stability in water. The pH 10 of the other emulsion is 7.0 to 7.2.

In further exemplary embodiments, the application of a tanning liquor composition with the active ingredient according to the invention and the evaluation of the achieved effect are presented.

Example 5

Glowe cowhide

The original liqueur mixture under the designation 1/1 was replaced by the designation 1/2 under the same conditions of all other technological operations. The composition of the liquefaction mixtures is given in the following Table I.

Table I.

Composition of liqueur emSsl mixture 1/1 mixture 1/2 Mixture III 8% 8 EAT Exoton EPA 0.5% 0.5% TR oil 4% - The preparation according to the invention prepared according to Example 1 ' - 4 Her Note:

Blend III contains 25 microns of PS lubricant, a lubricant based on butylene glycol reesterified fat, 50 microns of M lubricant, which is a sulfated fish oil lubricant with mineral oil added, and 25 microns of SCHR lubricant, which is an oxidized paraffin lubricant. and modified rapeseed oil. Exoton EPA Jo emulsifier based on sodium alkyl ether sulphate. TR oil is sulfated castor oil.

The treated leathers were evaluated for apparent shear modulus and torsional stiffness. The results are summarized in Table II.

3.

CS 267624 Bl

Table II leather using mixture 1/1 of mixture 1/2

Apparent modulus of elasticity in shear / ON 79 3831, 1982 / / MPa / 2.52 2.03

Torsional stiffness / ON 79 3831, 1982 / /mN.m/ 1 angular degree 34.8 21.5

The values given are the average of 10 measurements.

The results show that the same percentage of use of leaching agents results in a higher softness of the leather, which makes it possible to reduce the amount of liquefaction mixtures used according to the invention (economic effect). Example 6 Vucanil cowhide

The original liquefaction mixture under the designation 2/1 was replaced by a mixture using the preparation according to the invention under the designation 2/2 under the same conditions of all other technological operations. The composition of the liquefaction mixtures is given in the following Table III.

Table III

Composition of liquefaction mixture mixture 2/1 mixture 2/2

Sulfltol RP 4.5 $ 4.5%

Oil TR 4.5% preparation according to the invention prepared as described in Example 1-3

Note:

Sulfltol RP is a lubricant based on a sulfitated mixture of fish turf, oxidized paraffin and rapeseed oil.

TR oil is sulfitated castor oil.

The treated leathers were evaluated as in Example 5.

The results are summarized in Table IV.

Table IV leather using ^sm * ai 2/1 mixture 2/2

Apparent modulus of elasticity in shear

- / ON 79 3831, 1982 // MPa / 2.9 2.7

Torsional stiffness / ON 79 3831,1982 / /mN.M/ 1 angular degree 43.1 36,5

The values given are the average of 10 measurements.

The technical effect of increasing the softness of the leather has been achieved even with the use of a smaller batch of liquefaction mixture in the case of using the composition according to the invention.

The leather liqueur preparation 3 with the active ingredient and the process for the production of the active substance can be used in the leather industry where an increased softness of the leather processing with a higher filling effect is required.

Claims (2)

An active ingredient of a tanning liquor composition comprising a sulfated oleic acid addition product with a protein hydrolyzate condensate having 3 to 6 amino groups in the protein hydrolyzate molecules with oleyl chloride. 2. A process for the preparation of the active ingredient according to claim 1, characterized in that a mixture containing 3 to 70% by weight of rapeseed oil and 70 to 30% by weight of castor oil is sulphated with sulfuric acid in a weight ratio of 4: 1 to 4: 1.3 at 35 ° C. ° C to 40 ° C, after washing and neutralization to pH 6.8 to 7.5, the sulfated mixture is added to the oleyl chloride condensate of the protein hydrolyzate with 3 to 6 amino groups in the protein hydrolyzate molecules, at a temperature of 40 ° C to 4 ° C.