Composition for tanning leather

 

(57) Abstract:

Usage: composition for tanning leather. The essence of the invention: composition for tanning leather contains, wt%: chrome tanning agent 23 - 35; neutralizing means 30 to 40; waste product of adipic acid 3 - 33; polyethylenepolyamine sodium 2 - 16; sodium lignosulphonate 2 - 16. table 1.

The invention relates to compositions for tanning and can be used in the formulation of chrome leather.

Known composition for tanning leather, containing, wt.%: chrome tanning agent 32,8-54; organic acid salts 5,4-65,6; magnesium oxide 1,6-40,6 [1].

The prototype of the proposed technical solution is a composition for tanning leather, containing, wt.%: chrome tanning agent basicity of 33% with Cr content2O326% 29-55; neutralizing means (dolomite, magnesium oxide, sodium bicarbonate) 1,5-23; aliphatic dicarboxylic acids WITH4-C612-22 and/or their salts 22-69,5 [2].

The disadvantage of these compositions is that they do not provide leather for the uppers with high strength properties and heat resistance of more than 106aboutC.

The objective of the invention is to improve the quality of skin by increasing their prochnost the is achieved by the composition for tanning leather, including chrome tanning agent, neutralizing means and aliphatic dicarboxylic acid WITH4-C6, further comprises polyethylenepolyamine sodium and sodium lignosulphonate, as well as aliphatic dicarboxylic acid contains from waste adipic acid production in the following ratio, wt.%: Chrome tanning agent 23-35 Neutralizing means 30-40 Waste product of adipic acid 3-33 Polyethylenenaphtalene - sulfonate sodium 2-16 sodium Lignosulphonate 2-16

A distinctive feature of the proposed structure is that the introduction of polyethyleneglycolate sodium and sodium lignosulphonate allows you to get the skin with high strength properties and heat resistance of more than 110aboutWith the formation of additional cross-links between functional groups of proteins and compounds resulting from the interaction of the complexes of chromium (III) c active groups polyethyleneglycolate sodium and sodium lignosulphonate in the presence of aliphatic dicarboxylic acids and neutralizing means.

The use of aliphatic dicarboxylic acids WITH420% succinic acid, currently used, can improve the efficiency of the composition and dispose of waste chemical industry.

Polyethylenepolyamines sodium and sodium lignosulphonate currently used in the construction of buildings and structures as concrete admixtures.

The introduction of the neutralizing means less than 30% and waste production adipic acid less than 3% does not allow you to create the optimal pH for complexation of chromium ions with organic components of the composition in the process of tanning, which reduces viviremos chrome tanning agent skin. With the introduction of neutralizing means more than 40% deterioration in the quality of the leather, due to the fact that chrome tanning agent is deposited in the surface layers of the skin, which leads to the screed its front surface. Introduction waste adipic acid production more than 33% also leads to deterioration of the quality of the skins because of the high acidity of the composition. Introduction polyethyleneglycolate sodium lignosulphonate sodium less than 2% of each is not possible to significantly improve the mechanical properties and heat resistance of leather. The introduction of each of these components more than 16% is impractical, so the effect of the composition is the following. In a special mixer with mixer chrome tanning agent basicity 38-40% with Cr content2O326% mixed sequentially with neutralizing means (dolomite, magnesium oxide, sodium bicarbonate), a waste product of adipic acid and polyethylenepolyamines sodium and sodium lignosulphonate in the proposed ratio of components. All the ingredients are in powder form and thoroughly mixed to form a homogeneous mixture.

Technology of application of the composition is as follows.

The hide, obtained by standard methods from raw cattle, after plating in the same tub handle for 6-7 h at LCD 0,8-1 and a temperature of 20-25aboutWith the following composition, wt.%: Chrome tanning agent 23-35 Neutralizing means 30-40 Waste product of adipic acid 3-33 Polyethylenenaphtalene - sulfonate sodium 2-16 sodium Lignosulphonate 2-16

The flow rate of 4-5% by weight of the hide. Further processes and operations carried out by standard methods.

P R I m e R 1.

The hide, obtained by standard methods from raw materials byczyna after plating in the same tub were treated for 6 h (LC = 0,8) in the following composition, wt. %: Khromov the production of adipic acid (TU 113-03-20-70-828) 33 Polyethylenenaphtalene sulfonate sodium (TU 6-36-0204229-625-90) 2 sodium Lignosulphonate (OST 13-183-83) 2

The flow rate of 5% by weight of the hide.

Further processes and operations were carried out by standard methods.

P R I m m e R 2.

The hide, obtained by standard methods from raw materials rawhide average, after plating in the same bath was treated as in example 1 with the following composition, wt. %: Chrome tanning agent basicity 38-42% with Cr content2O326% 29 Dolomite (OST 1484-82) 35 Waste adipic acid production (TU 113-03-20-70-828) 18 Polyethylenenaphtalene - sulfonate sodium (TU 6-36-0204229-625-90) 9 sodium Lignosulphonate (OST 13-183-83) 9

Further processes and operations carried out by standard methods.

P R I m e R 3.

The hide, obtained by standard methods from raw materials rawhide heavy, after plating in the same bath was treated as in example 1 with the following composition, wt. %: Chrome tanning agent basicity 38-42% with Cr content2O326% 35 Dolomite (OST 1484-82) 29 sodium Bicarbonate 1 Waste adipic acid production (TU 113-03-20-70-828) 3 Polyethylenenaphtalene - sulfonate sodium (TU 6-36-0204229-625-90) 16 sodium Lignosulphonate (OST 13-183-83) 16

Further processes and operations carried out by standard methods.

P R I m e R 4.

The hide, obtained by standard methods from cromoly the tanning agent basicity 38-42% with Cr content2O326% 22 Dolomite (OST 1484-82) 37 magnesium Oxide 4 Waste adipic acid production (TU 113-03-20-70-828) 34 Polyethylenenaphtalene - sulfonate sodium (TU 6-36-0204229-625-90) 1.5 sodium Lignosulphonate (OST 13-183-83) 1,5

Further processes and operations carried out by standard methods.

P R I m e R 5.

The hide, obtained by standard methods from raw materials of the bull, after plating in the same bath was treated as in example 1 with the following composition, wt.% : Chrome tanning agent with the basicity of 38-42% with Cr content2O326% 36 Dolomite (OST 1484-82) 26 magnesium Oxide 3 Waste adipic acid production (TU 113-03-20-70-828) 2 Polyethylenenaphtalene - sulfonate sodium (TU 6-36-0204229-625-90) 16.5 sodium Lignosulphonate (OST 13-183-83) 16,5

Further processes and operations carried out by standard methods.

This has resulted in the leather for the uppers, which met all the requirements of GOST and had the figures shown in the table.

Using the proposed structure can improve the strength properties of the finished leather, to increase their resistance, makes it possible to dispose the waste in the chemical industry.

COMPOSITION FOR TANNING LEATHER, including chrome tanning agent, neutralizes who holds polyethylenepolyamines sodium and sodium lignosulphonate, and as the aliphatic dicarboxylic acid is a waste product of adipic acid in the following ratio, wt.%:

Chrome tanning agent - 23 - 35

Neutralizing means - 30 - 40

The waste product of adipic acid - 3 - 33

Polyethylenepolyamines sodium - 2 - 16

Sodium lignosulphonate - 2 - 16

 

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