SU1447854A1 - Composition for greasing hides - Google Patents

Description

(21) 4264441 / 28-12

(22) 06/17/87

(46) 12/30/88. Bnot. Number 48

(71) Central Research Institute of Leather and Shoe (T1

(72) B.S.Kochetygov, I.F.Gorbanev, A.S., Drozdov and G.A. Poltaratsky

(53) 675.026.233 (088.8)

(56) Leather Industry, 1974, 1, p. 3-5

USSR author's certificate I 777064, cl. C 14 C 9/00, 1979.

(54) COMPOSITION FOR FATING KSH

(57) The invention relates to the chemical industry and provides for the reduction of the air-tightness of the skin and the possibility of producing its light tones. The composition for fattening of the skin contains the following components, wt%: methyl oxidized esters of fractions 35-55; Oxidized methyl esters of the bottom of the residue obtained from the distillation of synthetic fatty acids of the Cg-Cjo fraction 15-25j and the emulsifier 20-5O. Fatting of skins of lame tanning for the top of the shoe is carried out on a used black dyeing bath and on Clear water for unpainted leather. . Grease is carried out at a temperature of 60-65 ° C for 45-60 minutes. Consumption of fatty composition of 5-8% by weight of planed leather, counting on 100% fat. 3 tab. .

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00

 one

The invention relates to the chemical treatment of leather, in particular, their warming up using fat, and can be used in the processing of all types of leather and organic tanning.

The aim of the invention is to reduce the degree of otdushistosti and the possibility of developing light-colored skins,

The composition for fattening the fatty acid, containing oxidized methyl esters and emulsifying agent, as oxidized oxidative ether, contains a mixture of oxidized fraction methylyl ethers (C25 and methyl oxidized oxidant distillation methyl esters obtained from the distillation of synthetic fatty acids ( QKK) Cjg-C Q fraction with the following de: m ratio of components, wt,%:

Methyl esters

oxidized fractions

C, C,

Metro esters

oxidized vat

residue received

from OCC distillation

fracr

Emulsifier

The use of a mixture of these oxidized methyl esters reduces the content of unwashed substances to 5% and the drop point to 32 ° C, which makes it possible to increase the penetrating ability of the composition into the skin and its even distribution over the layers and over the skin area. This contributes to the reduction of the otdushischy soft skin and the possibility of production of leather: 1 tones 5 because the proposed esters form a belup fat emulsion; In addition, the composition can be npiB-ieiiHTb for all types of leather.

The use of methyl esters of the Cj-Cjj-B fraction less than 35%, and methyl ethers of the oxidized VAT residue obtained from the bottom of the composition does not allow to compress soft elastic skin as a fraction of less than 15%. and an increase in their content above 55 and 25% does not allow to obtain stable fat emulsions.

The use of an emulsifier less than 20% in the composition of the fat to the composition does not allow obtaining stable fat emulsions for 30 minutes, but increases

An emulsifier over 50% contributes to a too stable fat emulsion over time that does not dissolve in the skin structure.

In tab. 1 shows the comparative data of physico-chemical parameters on methyl oxidized ethers, fractions (prototype rro) and mixtures of oxidized methyl esters, applied E to the proposed composition.

s 0

five

0

"

five

0

five

The technology of preparation of the composition is as follows.

The fattening of chrome tanned leather for shoe tops is carried out on a used black dyeing bath and on pure water for unpainted leather. The fat emulsion is prepared using conventional methods, the pH is adjusted to 7.5-8.0 with ammonia water.

The fat composition is poured into the drum on the go in one go. Liquid coefficient 1.0-1.2, temperature 60-65 ° C, processing time 45-60 minutes. Consumption of the composition of 5-8% by weight of planed leather (counting on 100% fat).

The resulting Russian leather and leather for the bottom of the shoe are unrolled and loaded into a pre-heated drum and rotated dry, without fat, while feeding hot air for 15–20 microns. Then, through the hollow axis of the drum, the prepared fat mixture is poured, heated to 65-75 Cj in two steps at intervals of 15-20 minutes. The temperature of the blown air is 80 ± 5 ° C, the exhaust air is 35-45 ° C. The processing time is 1.3-1.5 hours. The composition consumption for Russian leather of 20-23% 5 for leather of the bottom of the shoe is 290-2.5% of the mass of pressed leather. Further processing according to standard procedures.

Example 1. Leather chrome tanning, developed from the skins of bychin easy by a typical method, after dyeing process with the following fattening composition, wt,%:

Methyl esters oxidized fraction C, C2 y 35 Methyl esters oxidized VAT residue obtained from the distillation of FFA fractional SCHI C, -CGO Emulsifier

15 50

The emulsifier consists of two components,%: Sulfonated fish oil70 Paste VNIIZH 30 Further processing of the leather wire according to standard methods.

Example 2. Yuft, produced from the bykina tuskas easy on the type of method, is treated analogously to example 1 with the following fattening composition, wt.%:

Methyl esters oxidized fractions of C, -Cr5 45 Methyl esters of oxidized VAT residue, obtained from the distillation of FFA fraction C, g-C4o20 Sulfonated fish oil35 Further processing of the skin is carried out according to a standard procedure.

EXAMPLE 3: Bottom leathers, made from heavy skins by a typical procedure, are treated analogously to Example 1, the following fattening composition, wt%: Methyl ethers oxidized fractions 55 Methyl ethers oxidized VAT residue obtained from Distillation of FFA C, g-Cio25 Fraction Emulsifying Paste 20 Further processing of the leather wire according to the standard procedure.

Appearance and color Solid or

at 20 ° C

Acid number, mg KOH / g, not more than

In tab. 2 presents the data of physico-mechanical parameters ;; ozh, developed using the proposed composition and the prototype.

In tab. Table 3 presents the color stability data of direct dyes for leather used with the proposed composition and the prototype.

The use of the proposed composition improves the quality and reduces the output of scented skins.

Claims (1)

Invention Formula The composition for fattening of the skin, including methyl esters oxidized and An emulsifier, characterized in that, in order to reduce the perfume of the skin and the possibility of producing its light tones, it contains as oxidized methyl esters a mixture of methyl esters of an oxidized fraction of methyl esters of an oxidized VAT residue obtained from the distillation of synthetic fatty acid fractions, in the following ratio of components, in May.% J Methyl esters oxidized fractions Cj, -Cj5 35-55 Methyl esters oxidized VAT residue obtained from the distillation of synthetic kiric acids of fraction СC1515-25 Emulsifier 20-50 b l and c a 1 T a Hard or ointment product from light yellow go to light brown colors 50 35 Indicators Saponification number, mg KOH / g, not less Iodine number, g / 100 g, not more Mass fraction of substances,%, not more than Droplet temperature e% not more than Mass fraction of unrelated fatty substances,%, not less Strength at stretching, NPA Stress at occurrence of front layer cracks, MPa Relative lengthening at a voltage of 9., 8 MPa,% Relative bending stiffness on the device PZHU-12M, 9.8 N / m Adhesion Coating, 0.98 N / m: to dry skin to wet skin 29,627,626,223.8 24.0 21.7 24,221,921,617,5 29,329,025,925,0 16,522,824,833,1 640593-201185-Methyl esters, oxidized prototype according to the invention 65 180 15 ten 38 32 95 95 table 2 Table 3