SU1326620A1 - Composition for dubbing leather - Google Patents

Abstract

The invention relates to leather and improves the product quality by increasing the softness and durability of the skin to stretch and crack the front surface. The fat composition contains, in wt%: oxidized fatty acid esters 50-75; ethoxylated alkylphenols 5-10; emulsifier 15-45. As an emulsifier, the product of sulfonation of a mixture of oxidized methyl esters of synthetic fatty acids, technical animal fat, taken in a 1: 0.5-2 ratio, is used. Fatting is carried out at the LCD 1-1.2, temperature 60-65 ° C and fat consumption 5-6%. 1 tab. (L

Description

The invention relates to the chemical treatment of leather using fatty agents and can be used in the leather industry for the production of soft chrome leather.

The purpose of the invention is to improve the quality of products by increasing the softness and the urgency of the skin for stretching and cracking the front surface.

The essence of the invention is that the composition for fattening of the skin, containing fatty acid esters and emulsifier, additionally contains hydroxy-ethylated alkylphenols, and as an emulsifier - a sulfonation product of a mixture of oxidized methyl esters of synthetic fatty acids - C, and technical, animal fat in the following ratio of components, May,%: Esters of fatty

acids 50-75

Ethoxylated alkylphenols 5-10 Emulsifier 15-45

Depending on the number of attached hydroxyethyl groups, bxyethylated alkylphenols are characterized by the following brands: AF9-4 (4 mol of ethylene oxide), AF9-7 (7 mol of ethylene oxide), AF9-9 (9 mol of ethylene oxide), AF9-12 (12 mol ethylene oxide) and are derived from n-olefins. fractions., These products are light yellow to. brown color liquid with increasing viscosity with an increase in the number of moles of ethylene oxide added.

The product of sulfonation of a mixture of oxidized methyl esters of synthetically Cj-Cjj fatty acids and technical animal fat, taken in a ratio of 1: 0.5-2 (LENS), is produced in accordance with Spec. 38.407284-84,

Esters of fatty acids, used as neutral fattening components, are ointment-like products that increase the fullness of the skin. SMENS sulfoemulsifier increases the penetration of esters into the skin due to uniform screening and dismemberment of the fibers of the dermis: with the formation of spatial structures with a large number of cross-links with the collagen fibers, which increases the strength of the skin to break. Polyethylated alkylphenols contribute to the compaction of the facial layer of the skin and prevent the migration of fat through the layers during drying processes.

All this provides the skin with a tendency to stretch and crack the front surface.

Q is due to a change in the microstructure of the face layer and increases the softness of the skin.

The use of the SMENS sulfoemulsifier and oxidized ethyl alkyl phenols in the amount below the limits indicated in the claims of the invention does not ensure deep penetration of the composition into the skin and the formation of a strong face layer, as a result of which the strength properties of the skin are significantly lower and the rigidity is higher. The use of the SMENS sulfo emulsifier and ethoxylated alkyl phenols of the above indicated limits also does not provide sufficient softness.

5 skinned leathers and high strength properties of the facial layer of the skin.

The fat composition is prepared as follows.

The components of the composition are mixed and

Q is held at 70-90 ° C for 20 minutes until a homogeneous transparent mass is obtained. Fat emulsion is prepared by diluting the composition with water to 20-30% concentration, the pH of the resulting emulsion is 5-7,

The resulting composition is used to fatten the lame semi-finished product prepared from the standard technique of large iporaToro cattle, pork raw materials, goats,

0 Grease is carried out at a liquid ratio of 1-1.2 and a temperature of 60-65 ° C. The duration of fattening is 45- 60 minutes, the consumption of fat is 5-6% (calculated per 100%),

5 Example 1, Chrome semi-finished leather of cattle is greased with the following composition, wt.%: Oxidized methyl esters

0-C ,, 5.60

Ethoxylated alkylphenols AF9-45

Emulsifier35. g

5 Subsequent processes and operations are carried out according to a standard procedure.

Example 2, Chrome leather, you-) worked from pork semi-finished product, fat {composition, wt.%:

five

Methyl esters of synthetic fatty acids fraction 50 Hydroxyethylated alkylphenols AF9-710

Emulsifier - AO. Subsequent processes and operations are carried out according to a standard procedure.

Example 3. Chromium semi-skins from bovine skins (adroitly) are fattened with composition, wt.% Technical FFA esters and ethylene glycol (synthetic fat) 75 Hydroxyethyl alkylphenols AF9-7 10 Emulsifier15

Subsequent operations are carried out according to a new procedure.

PRI me R 4, Chromium semi-goby goby grease composition, wt.%: Methyl esters of synthetic fatty acids

10 N

50

Ethoxylated alkylphenols AF9-95

Emulsifier45

Subsequent processes and operations are carried out according to a standard procedure.

Example 5. Chrome prefabricated pork fat fat composition, May ,; Ethylene glycol esters of soft acids FFA fraction C.-C

Cj -cjj

ir ii

and

75

Ethoxylated alkylphenols AF9-95

Emulsifier20

Further processes and operations are carried out according to a standard procedure.

Example 6. Khromovish semi-finished products are clever according to a standard method, they live with the following composition, May,%;

Methyl esters

natural fatty acids ethoxylated alkylphenols

45

326620-

AF9-710

Emulsifier45

Further processes and operations. carried out according to a standard procedure.

Example 7. Chromic prefabricated bull by the standard method is greased with a slurry composition, May. %:

Distilled methyl 10

CJ, -Cj5 50 SLC esters

Ethoxylated-.

Alkylphenols

AF9-7-5

15 Emulsifier45

Further processes and operations are carried out according to a standard procedure.

The table gives the qualitative characteristics of the leathers obtained with the use of the proposed composition and the prototype.

The proposed composition for fattening of the skin provides, in comparison with the prototype, an increase in skin strength by 25% by 6–15% and cracking by 6–23% with simultaneous increase in skin softness.

The skinned skin of the proposed composition meets the requirements of elastic skin, is characterized by a durable face layer without scenting and tightening, and has a higher adhesion of the covering film to the skin.

35

Claims (1)

Invention Formula The composition for fattening of the skin, containing fatty acid esters and emulsifier, characterized in that, in order to improve the quality of the products by increasing the softness and durability of the skin to stretch and crack the front surface, it additionally contains ethoxylated alkylphenols and, as an emulsifier, the sulfonation of a mixture of oxidized methyl esters of synthetic fatty acids C. (j - C15 and technical animal fat in the following ratio of components, May. %; Fatty esters acids 50-75 Oketiliyrogy bath alkyl alkyl phenols 5-10 Emulsifier 15-45 ten 240 Compiled by S. Likhachev Editor N. Kishtulinets Tehred A. Kravchuk Order 3248/21 Circulation 373Subscription VNIIGSH State Committee. USSR Inventions and discoveries 113035, Moscow, JK-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 3.5 3.2 4.6 Proofreader Z. But ha