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 30 - 35; neutralizing means 35 to 40; polyethylenepolyamine sodium 15 - 20; sodium lignosulphonate 10 - 15. 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 32,8-54,0; 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 and 1.5-23; aliphatic dicarboxylic acids (C4-C612-22 and/or their salts 22-69,5 [2].

The disadvantage of these compositions is that they do not provide a full skin with a uniform distribution of chromium in layers, because chrome tanning agent to a greater extent deposited in the surface layers of the dermis.

The objective of the invention is to improve the quality of skin by increasing their is eat, the composition for tanning leather, including chrome tanning agent and neutralizing means further comprises polyethylenepolyamine sodium and sodium lignosulphonate in the following ratio, wt.%: Chrome tanning agent 30-35 Neutralizing means of 35-40 Polyethylenenaphtalene - sulfonate sodium 15-20 sodium Lignosulphonate 10-15

A distinctive feature of the proposed structure is that the introduction of polyethyleneglycolate sodium and sodium lignosulphonate, possessing, as determined experimentally, filling and plasticizing effect in the presence of neutralizing means, allows the composition fuller and deeper understanding of the structure of the dermis, and the chrome tanning agent with which these components form strong complexes evenly distributed across the layers of the skin, which improves its quality.

Polyethylenepolyamines sodium (TU 6-36-0204229-625-90) and sodium lignosulphonate (OST 13-183-83) currently used in the construction of buildings and structures as concrete admixtures.

Introduction polyethyleneglycolate sodium less than 15% and sodium lignosulphonate less than 10% leads to a decrease in their fills and plastifier the components more than 15 and 10% is impractical because further enhance their filling and plasticizing effects does not occur.

Technology of preparation of the composition is as follows.

In a special mixer with stirrer consistently mixed chrome tanning agent, neutralizing means, polyethylenepolyamines sodium and sodium lignosulphonate at the stated ratio of the components. All the ingredients are introduced in powder form and thoroughly mixed until 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 W.to. 0,8-1,0 following composition, wt.%: Chrome tanning agent 30-35 Neutralizing means of 35-40 Polyethylenenaphtalene - sulfonate sodium 15-20 sodium Lignosulphonate 10-15 a Flow rate of 3-5% 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 rawhide light, after plating in the same tub were treated for 6 h with the following composition, wt. % : Chrome tanning agent 30 basicity 38-40% stereophonic sodium (OST 13-183-83) 15 Flow rate of 5% by weight of the hide. Further processes and operations 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 32,5 basicity 38-40% with Cr content2O326% Dolomite (OST 1484-82) 36,5 sodium Bicarbonate 1,0

Polyethylenenaphtalene-

sulfonate sodium (TU 6-36-0204229-625-90) 17,5

Sodium lignosulphonate (OST 13-183-83) 12,5 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 of the bull, after plating in the same bath was treated as in example 1 with the following composition, wt.%: Chrome tanning agent basicity 38-48% with Cr content2O326% 35 Dolomite (OST 1484-82) 40 Polyethylenenaphtalene - sulfonate sodium (TU 6-36-0204229-625-90) 15 sodium Lignosulphonate (OST 13-183-83) 10 Further processes and operations carried out by standard methods.

P R I m e R 4.

The hide, obtained by standard methods from raw materials rawhide average, after plating in the same bath was treated with the following composition, wt.%: Chrome tanning agent basicity 38-40% with Cr content2OT 13-183-83) 16 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 basicity 38-40% with Cr content2O326% 36 Dolomite (OST 1484-82) 41 Polyethylenenaphtalene - sulfonate-sodium (TU 6-36-0204229-625-90) 14 sodium Lignosulphonate (OST 13-183-83) 9 Further processes and operations carried out by standard methods.

This has resulted in chrome leather for the uppers, which met all the requirements of GOST 939-88 differed a good fullness and a nice bar and had the figures shown in the table.

The use of the proposed composition for tanning leather will improve the quality of the skin by increasing their fullness and the uniform distribution of chromium oxide layers.

COMPOSITION FOR TANNING LEATHER, including chrome tanning agent and neutralizing means, characterized in that it further comprises polyethylenepolyamine sodium and sodium lignosulphonate in the following ratio, wt.%:

Chrome tanning agent - 30 - 35

Neutralizing remedies - 35 - 40

Polyethylenepolyamines sodium - 15 - 20

Lignos the

 

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