SU1118681A1 - Composition for impregnation of natural leather - Google Patents

Abstract

COMPOSITION FOR IMPREGNATION NATURAL RELATED leather, vyupyuchkhtsiy the ammonium salt copolymer acrylic acid copolymer, lower alcohols and water, characterized in that it contains an ammonium salt as a solvent to create an ammonia salt and a speed of phonic acid into the skin, it contains a matrix resin. 80-87% by weight of 4 ml of acrylic acid with carbon atoms in the alcohol residue 2–4 and 13–20 wt.% Acrylic acid, with a ratio of units,% by weight,% by weight, 7–4.4 Lower alcohols, 38.7 -58.8 Water36.7-56.8

Description

The invention relates to leather industry, in particular, to impregnation of natural skin, which is used to eliminate perfume of the skin.

A known composition for the impregnation of natural leather, comprising 100 mash of latex based on acrylic copolymer and 10-50 mash. impregnation accelerator 1. As an acrylic copolymer in a known composition from the underside}, a copolymer containing 72-74 wt.% butyl acrylate, 12 wt.% methyl methacrylate and A, 5-7 wt.% diethylaminoethyl methacrylate (DEAEMA), a latex brand of IFH-07, is used .

As an accelerator for the penetrator impregnation, water-organic solutions of surface-active substances (surfactants) are used, for example, the desired composition, wt.%:

OP-10 (surfactant) 10

Isopropyl

alcohol25

Water 65

In the preparation of a known composition for impregnating facial and skinned skin, the latex polymer is diluted with water to a dry matter content of 8-10%, mixed with a penetrator and applied to the skin.

A disadvantage of the known composition is the inadequate resistance of the coating to wet friction, due to the presence of surfactants in the composition, low adhesion of the coating film and insufficiently high grade of the finished leather.

The closest to the present invention is a composition for impregnation of natural leather of the brand Eucanol C, including May.%:

Poly-ethyl acrylate 24 Ammonium salt of polyacrylic acid6 Methyl alcohol 50 Water. 20 This formulation provides a wet friction resistant coating.

However, the grade of the finished leather treated with this composition does not dominate 77.7-77.8%, the change in the perfume of the refined leather is 95%. Moreover, the penetration rate of the impregnating compound in the face1 86812

The skin is unsatisfactory and is 16 sec., refined for 1 sec. The adhesion of the coating film to the facial skin is 360 N / m 5 (dry) and 130 N / m (wet).

The purpose of the invention is to improve the quality of the skin and the rate of penetration of the composition into the skin.

This goal is achieved by the fact that the composition for impregnation of natural leathers, including the film-forming agent — ammonium salt of acrylic acid copolymer, lower scyrts, and water — contains an ammonium salt of copolymer containing 80–87 wt.% Of acrylic ester with carbon atoms as the film-forming agent. in the alcohol residue 2-4 and 13-20 wt.% acrylic acid - 20 lots, in the following ratio, wt.%: The specified film former 3, 4

Lower alcohols 38.7-58.8 5 Water36.7-56.8

The ammonium salt of a copolymer of acrylic acid ester (C.) and acrylic acid is obtained by solution polymerization of the corresponding monomers in a mixture of water with isopropyl alcohol, followed by neutralization of the carboxyl groups of the resulting copolymer with ammonia. Conversion of monomers is 99.8 wt.%, Mass fraction of nonvolatile substances in a solution of 35 + 1%. The ammonium salt of the copolymer has the following structural formula:

{c z-CH TfrtcHz-CH Ti J

COOHNH3

COOR

where t. 150-160;

 p 35-50;

R CjHj -

Molecular weight is 20,000 + 5000.

Example 1. 100 mach. ammonium salt of a copolymer of 85 wt.% ethyl acrylate and 15 wt.% acrylic acid in the form of a 33.7% solution in a mixture of 39.3 wt.h. water and 27 mae. of isopropyl alcohol, the content of each substance is 33.7 parts by weight, which corresponds to 6.4 May.% of the composition) of the structural formula

i6H2-CH3 CH2-cH3-,

SOOS2N5 UNCONS 11

m. m. 20,000 J mixed with 250 mah. ethyl alcohol and 173.3 ma.ch. water for 15 min at room temperature. The total amount of lower alcohol (ispropyl and ethyl) in the Union is 277 ma.ch .; which corresponds to 53 wt.%. The total amount of water in the composition is 212.6 mah.h., which is equivalent. The rate is 40.6 May.%. The prepared composition is applied manually with a brush or through a syringe onto the surface of the skin. Then, under the operation of skin laying for 6-8 h, podushki at 25-30 ° C for 15-20 min and preses. Pointed dyeing is carried out according to the procedure applied to the leather. : Example 2. 100 mach. ammonium salt of copolymer 85% by weight of ethyl acrylate and 15% by weight of acrylic acid in the form of a 33.7% solution of copolymer in a mixture of 39.3 parts by weight waters and 27 ma.ch. isopropyl alcohol (the content of dry eopolymer is 33.7 ma.h., which erotates 4.5 May.% of the eoetava) of the structural formula (II) is mixed with 263 ma.h, ethyl ethyl alcohol and 386 ma.h. water. The total amount of lower alcohols in the composition is 290 ma.ch, which corresponds to 38.7 May.%. The total amount of water in eoetava is 425.3 ma.ch.ch., which corresponds to 56.8 May.%. Next in example 1. Example 3. 100 ma.ch. 85% by weight of ethyl acrylate and 15% by weight of acrylic acid in the form of a 33.7% solution of the eopolymer in a mixture of 39.3 wt.h. water and 27 ma.ch. isopropyl ester (the content of each of the eopolymers was 33.7 May.4., which corresponds to 4.5 May.% of the eoetava) of the structural formula (II), which makes up 413 wt.h. ethyl alcohol and 235.5 ma.ch. water. The total amount of the lower ethics in the 440 wt.ph. eutava, which corresponds to 58.8 wt.%. The total amount of water in the composition is 274.8 wt. Parts, which corresponds to 36.7% by mass. Next in example 1. Example 4. 100 May.4. ammonium salt of eopolymer 85% by mass of ethyl acrylate and 15% by weight of acrylic kielota in the form of a 33.7% solution of eopolymer in a volume of 39.3 parts by weight 14 and 27 ma.h. isopropyl alcohol (the content of each copolymer is 33.7 wt.%, which corresponds to 3.7 wt.% of the total composition) of the structural formula (II) is mixed with 431 wt.h. ethyl ethyl alcohol and 380 ma.ch. water. The total amount in the bottom of the Epirat-Etotava is 458 mas.ch., which corresponds to 50.3%; The total amount of water in the project is 419.3 mash, which corresponds to 46 May.%. Further, according to example 1.. Example 5. 100 mach. ammonium eol copolymer 80% by weight of butyl acrylate and 20% by weight of acrylic acid in the form of a 35% solution of copolymer in a mixture of 37 parts by weight.h. water and 28 ma.ch. isopropyl alcohol (the content of each copolymer in the composition is 35 wt.h., which corresponds to 6.4 May.% of the total eetetava) of the structural formula - СН2-СН СН2-СН350, 1 СООС ЭСООЙНз. m. 15000 emeshivay e 250 ma.ch. ethyl ethyl alcohol and 200 ma.ch. water. The total amount of lower alcohols in the project is 278 May.4., Which corresponds to 50.5 May.%. The total amount of water in the eeetava is 237 ma.ch.ch., which corresponds to 43.1 May.%. Next in example 1, Example 6. 100 ma.ch. ammonium eol of eopolymer 87 May.% ethyl acrylate and 13 May.% acrylic acid in the form of a 35% aqueous solution of an eopolymer in the room of 37 May, h, water, and 28 wt. isopropyl alcohol (the content of each eopolymer in eetave is 35 mah.h., which corresponds to 6.4 May.% of its eoetheva); the formula is -E ™ 2-Hfe-fCH2-CHfe СООС2Н5СООНННМ .м. . h. ethyl alcohol and 200 ma.ch. water. The total number of lower epics in the eetave is 278 ma.ch ,, which corresponds to 50.5 May.%. The total amount of water is 237 mAh, which corresponds to 43.1 May.%.

S1118 81

Then no example 1.

The properties of natural leather are presented in table1}.

As follows from the table, the use of the proposed composition for the impregnation of natural leather allows to increase the grade of the finished leather up to 82.2% compared to 77.8% of the prototype, to increase the adhesion of the covering mat to 380-415 N / m (dry) and tO 140-155 N / m (wet) compared to 360. TH / m and 130 N / m, respectively

according to the prototype. The resistance of the coating to wet friction with the use of the proposed composition over 500 revolutions of the disc (examples 1-6 according to the invention and 13 according to the prototype). The use of the proposed composition makes it possible to completely eliminate the perfume of refined leathers, while the penetration rate of the proposed composition is 2-4 seconds for facial skins, while the prototype is 16 seconds;

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Claims (1)

COMPOSITION FOR IMPAIRING NATURAL SKINS, including a film former - ammonium salt, a copolymer of acrylic acid, lower alcohols and water, with the exception that in order to improve the quality of the skin and the rate of penetration of the composition into the skin, it contains as a film former the ammonium salt of a copolymer containing May 80-87. X acrylic acid ester with the Number of carbon atoms in the alcohol residue of 2-4 and 13-20 wt. X acrylic acid,. in the following ratio, component, wt. X: The specified film former 3.7-6.4 Lower alcohols 38.7-58.8 _Q Water 36.7 * 56.8. § 1 111,8681