Impregnating composition for the material type synthetic leather

 

(57) Abstract:

The essence of the invention: water, 50% dispersion of a copolymer of butyl acrylate, methyl methacrylate, methacrylic acid and glycidylmethacrylate when the mass ratio of monomers 62-64:31-33:3,3-5,3:0,45-0,95 accordingly, 100, kaolin 8-10, aniline dye 0,2-0,4, water 45-50. Mixed at 80-100oC kaolin, aniline dye and water, cooled to 25oC, is mixed with a dispersion of acrylic copolymer and is used for impregnation of the textile basis, followed by drying at 100-140oC. characteristics of the textile material with a basis of polyamide fibers: the stiffness in the longitudinal direction 10 cH, the coefficient of friction of 0.12, resistance to repeated bending at 20oC 22000 cycles, the light fastness 5 points, gain coverage 20-5 g/m2. table 1.

The invention relates to a composition for the manufacture of materials such as artificial leather, in particular, for the impregnation of textile bases in the production of fancy material.

Known composition for the manufacture of artificial skin /1/, comprising a binder aqueous dispersion of a copolymer of polyvinyl alcohol (PVA) and methyl acrylate (MA) or a mixture of the latter with styrene, filler and pigment is) 100 110

Filler 100 400

The pigment or dye 0,1 10,0

Water 500 1000

However, the known composition has a high hardness and coefficient of friction, low resistance to repeated bending.

Closest to the proposed technical solution the prototype is a composition intended for the manufacture of a material such as artificial leather /2/.

This composition is applied on the front and reverse side of the textile basis, provides improved water and light fastness, but it does not improve the resistance to repeated bending. The composition contains water acrylic dispersion-based polymer wastes that were selected during the wastewater production of acrylic dispersions, kaolin, mechanon and modifying additive alcohol telomers of the formula H - (CF2-CF2)n-CH2OH, where n=4-10 in the following ratio, wt.

Polymer waste acrylic dispersions 25,0 35,0

Kaolin 5,0 15,0

LiteOn 5,0 10,0

Alcohol-telomere 0,025 0,050

Water the Rest

The material obtained on the prototype, has a high resistance to light, but has a higher stiffness and coefficient of friction, low resistance to multiple IIE their resistance to repeated bending.

This objective is achieved in that the impregnating composition for the material type artificial leather comprising the water dispersion of acrylic copolymer, kaolin, dye and water as the acrylic copolymer contains a copolymer of butyl acrylate, methyl methacrylate, methacrylic acid and glicylearllic when the weight ratio gauges 62-64:31-33; 3,3-5,3; 0,45-0,95 accordingly, and as a coloring substance aniline dye in the following ratio of components, wt. h

Aqueous dispersion of acrylic copolymer (50% dispersion)

100

Kaolin 8-10

Aniline dye 0,2-0,4

Water 45-50

On the dispersion of acrylic copolymer "Gramos 301" there are technical conditions: THE 6-02-57575 99-135-89.

Analysis of the known similar technical solutions used for the manufacture of materials such as artificial leather, shows that they lack the features that distinguish the present technical solution to the prototype, which together with the known characteristics of the latter provide high consumer properties of the material by reducing the stiffness and coefficient of friction, increase resistance to repeated bending.

the acrylic copolymer get emulsion copolymerization of methyl methacrylate (MMA), of butyl acrylate (BA), methacrylic acid (MAC) and glycidylmethacrylate (GMA) in the presence of emulsifier (sulfated neonols AF 9-12), initiator (ammonium persulfate) according to the following recipe, weight.

MMA 31 33

BA 62 64

MAC 3,3 5,3

GMA 0,45 0,95

Sulfated neonol AF-12 4

The ammonium persulfate 0.3 to

Water module 1:1

Pre monomers MMA and 12.7 l; BA-26,1 l; MAK-1,9; GMA-0.33 l is loaded into the mixer No. 1, stirred for 10 min, then download an emulsifier in the amount 1,49 kg, stirred for further 10 min the Obtained monomer mixture further used for synthesis. In the mixer N 2 pre-prepare a solution of ammonium persulfate in water: 110 g of ammonium persulfate dissolved in 800 ml of demineralized water or condensate. Later in the synthesis reactor load of 36.5 l condensate and heated to a temperature 802oC. When operating the stirrer download from the mixer N 2 the first portion (250 ml) of an aqueous solution of ammonium persulfate and begin to dispense through the rotameter mixer N 1 Monomeric mixture. The total dosing time Monomeric mixture 2 h After 1 h after draining half of the volume of monomer mixture are downloading a second portion of a solution of ammonium persulfate (250 ml). By ASPA of ammonium persulfate in the amount of 300 ml and produce the extract for 30 min at a temperature of 802oC. after aging the finished product is cooled to 40-45oC and poured acrylic dispersion in the tank. For preparation of the impregnating composition take 8 mass.h. kaolin and 0.2 mass. including aniline dye direct red (TU 6-14-450-80), diluted with 45 mass.h. water at a temperature of 80-100oC, intensively stirred, cooled to 25oC and then injected 100 mass.h. water dispersion of acrylic copolymer (50% dispersion), again mixed and impregnated with the obtained composition, a textile basis of polyamide fibers (art. 55223), and then dried at 100-140oC.

Example 2. Water acrylic dispersion prepared as in example 1. Take 10 mass.h. kaolin, 0.4 mass.h. aniline dye direct yellow fade resistant "O" ( GOST 13553-78), diluted in 50 mass.h. water at 80-100oC, intensively stirred, cooled to 25oC and then injected 100 mass. including water dispersion of acrylic copolymer (50% dispersion), again mixed and impregnated with this composition nonwoven basis of a mixture of 70% synthetic and 30% viscose (art. 935577), dried at 100-140oC.

Example 3. Water acrylic dispersion prepared as in example 1. Take 9 of the masses.h. kaolin, 0.3 mass.h. analadult to 25oC and then injected 100 mass.h. water dispersion of acrylic copolymer (50% dispersion), again mixed and impregnated with this composition woven textile base of chemical fiber: 70% polyester and 30% viscose fiber art. 86-7 (TU 17-380-88), dried at 100-140oC.

Example 4. A sealing compound is prepared according to example 3, but using stitch the basis of khlopkopryadilnaya yarn art. 912129, 912130 (TU 17 RSFSR N-12-1-89).

Example 5 (the prototype). In a mixer, pour the water and with stirring download 0,038 masses.h. alcohol-telomere formula H-(CF2-CF2)n-CH2OH, where n= 4-10, 30 mass.h. water dispersion of acrylic copolymer (calculated on dry substance), 10 mass.h. kaolin, 8 mass.h. of lithopone. Water is added to 100 mass. including This composition is applied to the calico (art. 6938, 6427) with front and back sides, followed by drying with two sides at 100-105oC and calendarbut at 80-90oC. properties of the resulting materials are summarized in table.

The table shows that the material on the proposed technical solution has high performance and tailoring properties: optimal for fancy materials hardness, low friction coefficient, Powys 4 times lighter what is known and can be operated at low temperatures. High technical and economic effect is achieved in a single process operation, i.e., simplified fabrication process of the material.

Impregnation of the material such as artificial leather, comprising the water dispersion of acrylic copolymer, kaolin, dye and water, characterized in that, to reduce stiffness and friction coefficient and improve the resistance to repeated bending, he as the acrylic copolymer contains a copolymer of butyl acrylate, methyl methacrylate, methacrylic acid and glycidylmethacrylate when the mass ratio of monomers 62 64 31 33 3,3 5,3 0,45 0,95 respectively, and as a coloring substance aniline dye in the following ratio, wt.h.

Aqueous dispersion of acrylic copolymer (50% dispersion)

100

Kaolin 8 10

Aniline dye 0,2 0,4

Water 45 50

 

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