CN110144738B - Preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance - Google Patents

Preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance Download PDF

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Publication number
CN110144738B
CN110144738B CN201910394740.0A CN201910394740A CN110144738B CN 110144738 B CN110144738 B CN 110144738B CN 201910394740 A CN201910394740 A CN 201910394740A CN 110144738 B CN110144738 B CN 110144738B
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parts
layer slurry
resistance
automobile seat
slurry
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CN110144738A (en
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汪旗
戴丽
周志军
洪斌
陈永
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Zhejiang Hexin New Material Co ltd
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Zhejiang Hexin New Material Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
    • D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/121—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds
    • D—TEXTILES; PAPER
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/147—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the isocyanates used
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/186—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials one of the layers is on one surface of the fibrous web and the other layer is on the other surface of the fibrous web
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2205/00—Condition, form or state of the materials
    • D06N2205/02—Dispersion
    • D06N2205/023—Emulsion, aqueous dispersion, latex
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    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
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    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1685—Wear resistance
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    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

The invention discloses a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance, which comprises the following steps: A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper; B. coating the prepared epidermal layer slurry on release paper to form an epidermal layer; C. coating the prepared intermediate layer slurry on the surface layer to form an intermediate layer; D. coating the prepared bonding layer slurry on the middle layer, E, then attaching the bonding layer slurry to microfiber base cloth, drying, curing, and stripping release paper to obtain the automobile seat leather; F. preparing surface printing slurry; G. and coating the prepared surface printing slurry on the other surface of the surface layer of the automobile seat leather, drying and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance. The automobile seat leather with excellent folding resistance, wear resistance and aging resistance prepared by the preparation method meets the general GMW14122 standard.

Description

Preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance
Technical Field
The invention relates to the field of polyurethane leather, in particular to a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
Background
The polyurethane synthetic leather (polyurethane synthetic leather) has the advantages of high strength, wear resistance, cold resistance, air permeability, aging resistance, solvent resistance, soft texture, beautiful appearance and the like, has good processing performance, is an ideal leather-like product for replacing natural leather, and has better performance than PVC leather. The polyurethane synthetic leather is widely applied to industries such as clothes, shoemaking, cases, furniture and the like. The industrial production method of the polyurethane synthetic leather mainly comprises a dry method and a wet method.
Superfine fiber synthetic leather (microfiber leather) is a product across industries, and research, development and application technologies of the superfine fiber synthetic leather relate to the fields of textiles, plastics, chemical engineering and the like. The artificial leather is a novel high-grade artificial leather made of superfine fibers, can be used in various fields such as shoes, bags, furniture, automotive trims and the like, and has the characteristics of genuine leather and indexes superior to the genuine leather. Polyurethane synthetic leather using a three-dimensional network structure ultrafine fiber non-woven fabric as a base fabric is a new generation of synthetic leather developed in recent years, and is called fourth generation artificial leather, which is comparable to high-grade natural leather, has the inherent moisture absorption and air permeability of natural leather, and is superior to natural leather in chemical resistance, water resistance, mildew resistance and the like.
At present, the automobile seat leather for high-grade commercial vehicles, such as the seat leather for general-purpose Buick commercial vehicles, adopts leather fabric in the prior art, and adopts microfiber to replace the leather for development, so that the aims of reducing the cost, improving the utilization rate and improving the cost performance of products are fulfilled; secondly, the microfiber product has strong functionality, excellent comfort and excellent physical performance.
However, the currently used automobile seat leather has the following problems: the folding resistance, the wear resistance and the aging resistance are also poor, and the GMW14122 standard of a general-purpose automobile is difficult to pass.
Based on the situation, the invention provides the preparation method of the automobile seat leather with excellent folding resistance, wear resistance and aging resistance, and the preparation method can effectively solve the problems.
Disclosure of Invention
The invention aims to provide a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance. The automobile seat leather (microfiber product) with excellent folding resistance, wear resistance and aging resistance prepared by the preparation method of the automobile seat leather with excellent folding resistance, wear resistance and aging resistance is excellent (superior), and can be used as automobile seat leather of high-grade business vehicles, such as universal Buick business vehicle seat leather, to replace leather fabrics, so that the cost can be reduced, the utilization rate can be improved, and the product cost performance is higher; the functional performance is strong, the comfortable feeling is excellent, the physical performance is excellent, and the GMW14122 standard of the general automobile is met.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance comprises the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.1-0.2 mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.15-0.25 mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.15-0.25 mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 8-20 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 6-48 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 6-10 parts of water-based organic silicon assistant, 0.5-3 parts of water-based thickening agent, 0.3-1.5 parts of water-based flatting agent and 4-8 parts of water-based isocyanate crosslinking agent, and stirring for 20-40 minutes to prepare surface printing slurry; the viscosity of the surface printing slurry is 500-2000 cps/25 ℃;
G. and E, coating the prepared surface printing slurry on the other surface (namely the surface opposite to the middle layer) of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 60-120 g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
The automobile seat leather (microfiber product) with excellent folding resistance, wear resistance and aging resistance prepared by the preparation method of the automobile seat leather with excellent folding resistance, wear resistance and aging resistance is excellent (superior), and can be used as automobile seat leather of high-grade business vehicles, such as universal Buick business vehicle seat leather, to replace leather fabrics, so that the cost can be reduced, the utilization rate can be improved, and the product cost performance is higher; the functional performance is strong, the comfortable feeling is excellent, the physical performance is excellent, and the general GMW14122 standard is passed.
Preferably, in step a, the method for preparing the bonding layer slurry comprises: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate-polyether copolymerized polyurethane resin, 20-40 parts of dimethyl formamide and 20-40 parts of ethyl acetate, stirring for 20-40 minutes, adding 1-3 parts of isocyanate crosslinking agent, and continuously stirring for 5-10 minutes to prepare bonding layer slurry; the viscosity of the bonding layer slurry is 8000-15000 cps/25 ℃.
Preferably, the polycarbonate-polyether copolymerized polyurethane resin is prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin.
Preferably, the isocyanate crosslinking agent is one or more of Desmodur L75 of Bayer company, Germany, DN-950 of Japan DIC company and X-200 of Dari chemical industry Co.
Preferably, in step a, the method for preparing the interlayer slurry comprises: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate and 10-35 parts of color paste, stirring for 20-40 minutes, and preparing intermediate layer slurry; the viscosity of the middle layer slurry is 3000-6000 cps/25 ℃.
Preferably, in step a, the method for preparing the skin layer slurry comprises: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate, 10-35 parts of color paste and 0.3-2 parts of organic silicon additive are mixed and stirred for 20-40 minutes to prepare skin layer slurry; the viscosity of the surface layer slurry is 3000-6000 cps/25 ℃.
Preferably, in the step A, the organic silicon auxiliary agent is one or two of Q2-3238 dispersible organic silicon additive and Q2-3289 organic silicon auxiliary agent of Dow Corning company in America.
Preferably, in the step F, the water-based silicone additive is any one or a mixture of DC-57 of Dow Corning company, 358 of United states chemical industry and HM-186 of Stahl company.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the automobile seat leather (microfiber product) with excellent folding resistance, wear resistance and aging resistance prepared by the preparation method of the automobile seat leather with excellent folding resistance, wear resistance and aging resistance is excellent (superior), and can be used as automobile seat leather of high-grade business vehicles, such as universal Buick business vehicle seat leather, to replace leather fabrics, so that the cost can be reduced, the utilization rate can be improved, and the product cost performance is higher; the functional performance is strong, the comfort is excellent, the physical property is excellent, and the product index accords with the general GMW14122 standard.
According to the invention, the microfiber base cloth is used as a substrate, and the resin and other components of each layer are optimally combined in a microstructure by adjusting the resin modulus and proportion of the bonding layer, the middle layer and the surface layer, so that the microfiber base cloth is soft in hand feeling and good in resilience; the polyurethane resins of the middle layer and the surface layer are both polycarbonate polyurethane resin and polycarbonate polyol, so that the solvent resistance, weather resistance and wear resistance of the surface layer are ensured; meanwhile, the aliphatic isocyanate is used, so that the yellowing resistance is ensured; adopting a special synthesis process to prepare polycarbonate-polyether copolymerized polyurethane resin which is used as the resin of the bonding layer, and mixing a certain proportion of polyether component to improve the toughness of the resin; the matching of the modulus proportion of the resin ensures the resilience of the resin, the perfect combination of the resin and the base cloth, the integrity is strong, the softness is good, and the resin passes the test of low-temperature folding resistance.
The skin layer of the invention adopts polycarbonate polyurethane resin, and is added with organosilicon abrasion-resistant auxiliary agent (organosilicon auxiliary agent) in proper proportion, wherein the organosilicon auxiliary agent is one or the mixture of Q2-3238 dispersible organosilicon additive and Q2-3289 organosilicon auxiliary agent of Dow Corning company; the surface printing slurry forms a surface printing layer, and the waterborne polycarbonate polyurethane resin is adopted, and a waterborne wear-resistant additive (waterborne organic silicon additive) with a proper proportion is added, so that the wear resistance can be obviously improved; the two are combined to improve the smoothness of the surface, and the surface is tested by vibration abrasion resistance.
In the invention, dimethyl formamide and ethyl acetate are used as solvents, and the dissolved resin is adjusted to proper viscosity; the proportion can be set according to the required viscosity; the color paste is a color paste commonly used in the field and plays a role in adjusting color. The kind and amount of the color paste can be determined by those skilled in the art according to the needs. Such as black paste or a series of colors mixed by several colors.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance comprises the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.1-0.2 mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.15-0.25 mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.15-0.25 mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 8-20 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 6-48 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 6-10 parts of water-based organic silicon assistant, 0.5-3 parts of water-based thickening agent, 0.3-1.5 parts of water-based flatting agent and 4-8 parts of water-based isocyanate crosslinking agent, and stirring for 20-40 minutes to prepare surface printing slurry; the viscosity of the surface printing slurry is 500-2000 cps/25 ℃;
G. and E, coating the prepared surface printing slurry on the other surface (namely the surface opposite to the middle layer) of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 60-120 g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
Preferably, in step a, the method for preparing the bonding layer slurry comprises: the preparation method comprises the following steps of: 100 parts of polycarbonate-polyether copolymerized polyurethane resin (polycarbonate-polyether (copolymerization) polyurethane resin), 20-40 parts of dimethylformamide and 20-40 parts of ethyl acetate are mixed, stirred for 20-40 minutes, then 1-3 parts of isocyanate crosslinking agent is added, and stirring is continued for 5-10 minutes to prepare bonding layer slurry; the viscosity of the bonding layer slurry is 8000-15000 cps/25 ℃.
Preferably, the polycarbonate-polyether copolymerized polyurethane resin is prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin.
Preferably, the isocyanate crosslinking agent is one or more of Desmodur L75 of Bayer company, Germany, DN-950 of Japan DIC company and X-200 of Dari chemical industry Co.
Preferably, in step a, the method for preparing the interlayer slurry comprises: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate and 10-35 parts of color paste, stirring for 20-40 minutes, and preparing intermediate layer slurry; the viscosity of the middle layer slurry is 3000-6000 cps/25 ℃.
Preferably, in step a, the method for preparing the skin layer slurry comprises: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate, 10-35 parts of color paste and 0.3-2 parts of organic silicon additive are mixed and stirred for 20-40 minutes to prepare skin layer slurry; the viscosity of the surface layer slurry is 3000-6000 cps/25 ℃.
Preferably, in the step A, the organic silicon auxiliary agent is one or two of Q2-3238 dispersible organic silicon additive and Q2-3289 organic silicon auxiliary agent of Dow Corning company in America.
Preferably, in the step F, the water-based silicone additive is any one or a mixture of DC-57 of Dow Corning company, 358 of United states chemical industry and HM-186 of Stahl company.
Example 2:
a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance comprises the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.1mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.15mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.15mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 8 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 6 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 6 parts of water-based organic silicon additive, 0.5 part of water-based thickener, 1 part of water-based leveling agent and 8 parts of water-based isocyanate crosslinking agent are mixed and stirred for 20 minutes to prepare surface printing slurry; the viscosity of the surface printing paste is 1000cps/25 ℃;
G. and E, coating the prepared surface printing slurry on the other surface (namely the surface opposite to the middle layer) of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 60g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
In this embodiment, in step a, the method for preparing the bonding layer slurry is: the preparation method comprises the following steps of: 100 parts of polycarbonate-polyether copolymerized polyurethane resin, 40 parts of dimethylformamide and 20 parts of ethyl acetate, stirring for 30 minutes, adding 3 parts of isocyanate crosslinking agent, mixing, and stirring for 5 minutes to prepare bonding layer slurry; the viscosity of the tie-layer slurry was 8000cps/25 ℃.
In this example, the polycarbonate-polyether copolymerized polyurethane resin was prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin.
In this example, the isocyanate crosslinker was Desmodur L75 from bayer ag.
In this embodiment, in step a, the method for preparing the interlayer slurry is as follows: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 50 parts of dimethylformamide, 20 parts of ethyl acetate and 35 parts of color paste, and stirring for 25 minutes to prepare intermediate layer slurry; the viscosity of the interlayer slurry was 3000cps/25 ℃.
In this embodiment, in step a, the method for preparing skin layer slurry is: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 50 parts of dimethylformamide, 20 parts of ethyl acetate, 35 parts of color paste and 2 parts of organic silicon additive are mixed and stirred for 25 minutes to prepare skin layer slurry; the viscosity of the skin layer slurry was 3000cps/25 ℃.
In this example, step A, the silicone additive was a Q2-3238 dispersible silicone additive from Dow Corning, USA.
In this example, step F, the aqueous silicone adjuvant is DC-57 from Dow Corning, USA.
In this embodiment, when the temperature of the used drying oven (or drying oven) is within a certain range, the temperature of each section is at least 2 sections, and the temperature of each section is gradually increased, for example, the temperature is 60 ℃ to 150 ℃, the used drying oven is 3 sections of drying ovens, the temperature is 60 ℃, 90 ℃ and 120 ℃ in sequence, or the temperature is 80 ℃, 120 ℃ and 150 ℃ in sequence, and those skilled in the art can determine the temperature as required.
The automobile seat leather with excellent folding resistance, wear resistance and aging resistance obtained in the embodiment is tested, and the result is as follows: low-temperature folding resistance: 3 thousands times of surfaces are not cracked at (-20 ℃), and technical breakthrough is realized; vibration learning and wear resistance: the surface is not broken for 6 ten thousand times (according to JIS L0849 standard), and the technical breakthrough is realized; aging resistance: the jungle (70 ℃, 95% RH) has no surface crack and no chalking after 10 weeks.
Example 3:
a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance comprises the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.2mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.25mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.25mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 20 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 48 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 6 parts of water-based organic silicon assistant, 1 part of water-based thickener, 0.3 part of water-based leveling agent and 4 parts of water-based isocyanate crosslinking agent are mixed and stirred for 20-30 minutes to prepare surface printing slurry; the viscosity of the surface printing paste is 1200cps/25 ℃;
G. and E, coating the prepared surface printing slurry on the other surface (namely the surface opposite to the middle layer) of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 120g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
In this embodiment, in step a, the method for preparing the bonding layer slurry is: the preparation method comprises the following steps of: 100 parts of polycarbonate-polyether copolymerized polyurethane resin, 20 parts of dimethylformamide and 30 parts of ethyl acetate, stirring for 40 minutes, adding 1 part of isocyanate crosslinking agent, mixing, and stirring for 5 minutes to prepare bonding layer slurry; the tack layer slurry has a viscosity of 12000cps/25 ℃.
In this example, the polycarbonate-polyether copolymerized polyurethane resin was prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin.
In this example, the isocyanate crosslinking agent was DN-950 from the company DIC, Japan.
In this embodiment, in step a, the method for preparing the interlayer slurry is as follows: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 30 parts of dimethylformamide, 20 parts of ethyl acetate and 15 parts of color paste, and stirring for 35 minutes to prepare intermediate layer slurry; the viscosity of the middle layer slurry is 5000cps/25 ℃.
In this embodiment, in step a, the method for preparing skin layer slurry is: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 30 parts of dimethylformamide, 20 parts of ethyl acetate, 15 parts of color paste and 1 part of organic silicon assistant are mixed and stirred for 30 minutes to prepare skin layer slurry; the viscosity of the skin layer slurry was 5000cps/25 ℃.
In this example, in step A, the silicone additive was Q2-3289 silicone additive from Dow Corning, USA.
In this example, in step F, the aqueous silicone additive is 358 additive of united states chemical industry.
In this embodiment, when the temperature of the used drying oven (or drying oven) is within a certain range, the temperature is at least 2 sections, and the temperature of each section is gradually increased, for example, the temperature is 60 ℃ to 150 ℃, the used drying oven is 3 sections of drying oven, the temperature is 60 ℃, 90 ℃ and 120 ℃ in sequence, or the temperature is 80 ℃, 120 ℃ and 150 ℃ in sequence, and those skilled in the art can determine the temperature as required.
The automobile seat leather with excellent folding resistance, wear resistance and aging resistance obtained in the embodiment is tested, and the result is as follows: low-temperature folding resistance: 3 thousands times of surfaces are not cracked at (-20 ℃), and technical breakthrough is realized; vibration learning and wear resistance: the surface is not broken for 6 ten thousand times (according to JIS L0849 standard), and the technical breakthrough is realized; aging resistance: the jungle (70 ℃, 95% RH) has no surface crack and no chalking after 10 weeks.
Example 4:
a preparation method of automobile seat leather with excellent folding resistance, wear resistance and aging resistance comprises the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.15mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.2mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.2mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 15 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 18 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 8 parts of water-based organic silicon additive, 2 parts of water-based thickener, 0.6 part of water-based leveling agent and 6 parts of water-based isocyanate crosslinking agent are mixed and stirred for 25 minutes to prepare surface printing slurry; the viscosity of the surface printing paste is 2000cps/25 ℃;
G. and E, coating the prepared surface printing slurry on the other surface (namely the surface opposite to the middle layer) of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 90g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance.
In this embodiment, in step a, the method for preparing the bonding layer slurry is: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate-polyether copolymerized polyurethane resin, 20 parts of dimethylformamide and 15 parts of ethyl acetate, stirring for 35 minutes, adding 2 parts of isocyanate crosslinking agent, and continuously stirring for 8 minutes to prepare bonding layer slurry; the viscosity of the tie layer slurry was 10500 cps/25 ℃.
In this example, the polycarbonate-polyether copolymerized polyurethane resin was prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin.
In this example, the isocyanate crosslinking agent was a mixture of DN-950 from Japan DIC and X-200 from Dari chemical Co., Ltd in a mass ratio of 1: 0.65.
In this embodiment, in step a, the method for preparing the interlayer slurry is as follows: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 30 parts of dimethylformamide, 30 parts of ethyl acetate and 25 parts of color paste, and stirring for 30 minutes to prepare intermediate layer slurry; the viscosity of the interlayer slurry is 4500cps/25 deg.C.
In this embodiment, in step a, the method for preparing skin layer slurry is: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 30 parts of dimethylformamide, 30 parts of ethyl acetate, 25 parts of color paste and 1.5 parts of organic silicon additive are mixed and stirred for 30 minutes to prepare skin layer slurry; the viscosity of the skin layer slurry was 4450cps/25 ℃.
In this example, in step A, the silicone additive was a mixture of Q2-3238 dispersible silicone additive and Q2-3289 silicone additive, both at a mass ratio of 1:1.45, from Dow Corning, USA.
In this example, in step F, the aqueous silicone additive is a mixture of DC-57 from Dow Corning, USA, and HM-186 from Stahl, in a mass ratio of 1: 1.35.
In this embodiment, when the temperature of the used drying oven (or drying oven) is within a certain range, the temperature is at least 2 sections, and the temperature of each section is gradually increased, for example, the temperature is 60 ℃ to 150 ℃, the used drying oven is 3 sections of drying oven, the temperature is 60 ℃, 90 ℃ and 120 ℃ in sequence, or the temperature is 80 ℃, 120 ℃ and 150 ℃ in sequence, and those skilled in the art can determine the temperature as required.
The automobile seat leather with excellent folding resistance, wear resistance and aging resistance obtained in the embodiment is tested, and the result is as follows: low-temperature folding resistance: 3 thousands times of surfaces are not cracked at (-20 ℃), and technical breakthrough is realized; vibration learning and wear resistance: the surface is not broken for 6 ten thousand times (according to JIS L0849 standard), and the technical breakthrough is realized; aging resistance: the jungle (70 ℃, 95% RH) has no surface crack and no chalking after 10 weeks.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims (4)

1. The preparation method of the automobile seat leather with excellent folding resistance, wear resistance and aging resistance is characterized by comprising the following steps:
A. preparing bonding layer slurry, preparing middle layer slurry, preparing epidermal layer slurry, and selecting base cloth and release paper;
B. coating the prepared epidermal layer slurry on release paper, wherein the coating thickness is 0.1-0.2 mm, and then controlling the temperature of an oven to dry at 60-150 ℃, and cooling to form an epidermal layer;
C. coating the prepared intermediate layer slurry on the surface layer, wherein the coating thickness is 0.15-0.25 mm, and then controlling the temperature of the oven to be 60-150 ℃ for drying and cooling to form an intermediate layer;
D. coating the prepared bonding layer slurry on the middle layer, wherein the coating thickness is 0.15-0.25 mm, and then pre-drying the bonding layer slurry in a semi-dry state, wherein the temperature of a used drying oven is 60-130 ℃, and the retention time in the drying oven is 8-20 s;
E. then, attaching the automobile seat leather to microfiber base cloth, drying, curing at the temperature of a drying oven of 60-150 ℃, wherein the temperature of a curing chamber is 50-100 ℃, the curing time is 6-48 hours, and finally peeling off release paper to obtain the automobile seat leather;
F. the preparation method comprises the following steps of: 100 parts of water-based polycarbonate polyurethane resin, 6-10 parts of water-based organic silicon assistant, 0.5-3 parts of water-based thickening agent, 0.3-1.5 parts of water-based flatting agent and 4-8 parts of water-based isocyanate crosslinking agent, and stirring for 20-30 minutes to prepare surface printing slurry; the viscosity of the surface printing slurry is 500-2000 cps/25 ℃;
G. coating the prepared surface printing slurry on the surface of the surface layer of the automobile seat leather obtained in the step E, wherein the coating amount is 60-120 g/m2, and then controlling the temperature of an oven to dry at 60-150 ℃ and cooling to obtain the automobile seat leather with excellent folding resistance, wear resistance and aging resistance;
in the step A, the method for preparing the bonding layer slurry comprises the following steps: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate-polyether copolymerized polyurethane resin, 20-40 parts of dimethyl formamide and 20-40 parts of ethyl acetate, stirring for 20-40 minutes, adding 1-3 parts of isocyanate crosslinking agent, and continuously stirring for 5-10 minutes to prepare bonding layer slurry; the viscosity of the bonding layer slurry is 8000-15000 cps/25 ℃;
the polycarbonate-polyether copolymerized polyurethane resin is prepared by the following method: adding 60 parts by weight of polytetrahydrofuran ether glycol, 40 parts by weight of polycarbonate diol, 8 parts by weight of hexamethylene diisocyanate trimer and 100 parts by weight of butyl acetate into a reaction kettle, and uniformly stirring; continuously stirring, heating to 100-110 ℃, stirring and refluxing, and dehydrating for 70-80 min under a vacuum condition; cooling to 75-85 ℃, adding 12 parts by weight of isophorone diisocyanate and 3 parts by weight of stannous octoate, heating to 110-120 ℃, and keeping the temperature for 5-7 hours; adding a reaction terminator, and then cooling and discharging to obtain the polycarbonate-polyether copolymerized polyurethane resin;
in step a, the method for preparing the intermediate layer slurry comprises: the preparation method comprises the following steps of: mixing 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate and 10-35 parts of color paste, stirring for 20-40 minutes, and preparing intermediate layer slurry; the viscosity of the middle layer slurry is 3000-6000 cps/25 ℃;
in step a, the method for preparing the skin layer slurry comprises: the preparation method comprises the following steps of: 100 parts of polycarbonate polyurethane resin, 20-50 parts of dimethylformamide, 20-50 parts of ethyl acetate, 10-35 parts of color paste and 0.3-2 parts of organic silicon additive are mixed and stirred for 20-40 minutes to prepare skin layer slurry; the viscosity of the surface layer slurry is 3000-6000 cps/25 ℃.
2. The method for preparing automobile seat leather with excellent folding endurance, abrasion resistance and aging resistance as claimed in claim 1, wherein the isocyanate crosslinking agent is any one or more of Desmodur L75 of Bayer, Germany, DN-950 of DIC, and X-200 of Dari chemical Limited.
3. The method for preparing the automobile seat leather with excellent folding endurance, abrasion resistance and aging resistance as claimed in claim 1, wherein in the step A, the organosilicon additive is one or both of a Q2-3238 dispersible organosilicon additive and a Q2-3289 organosilicon additive of Dow Corning company.
4. The method for preparing the automobile seat leather with excellent folding endurance, abrasion resistance and aging resistance as claimed in claim 1, wherein in the step F, the aqueous silicone additive is any one or a mixture of DC-57 of dow corning company, 358 of united states chemical industry and HM-186 of Stahl company.
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