CN114752291A - Surface treatment agent and leather coated with same - Google Patents

Surface treatment agent and leather coated with same Download PDF

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Publication number
CN114752291A
CN114752291A CN202011594977.2A CN202011594977A CN114752291A CN 114752291 A CN114752291 A CN 114752291A CN 202011594977 A CN202011594977 A CN 202011594977A CN 114752291 A CN114752291 A CN 114752291A
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Prior art keywords
resin
agent
surface treating
curing agent
treating agent
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CN114752291B (en
Inventor
顾磊
徐龙城
刘海洋
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Benecke Changshun Automotive Interior Materials Zhangjiagang Co ltd
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Benecke Changshun Auto Trim Zhangjiagang Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2415/00—Characterised by the use of rubber derivatives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The invention discloses a surface treating agent and leather coated with the same. The surface treating agent comprises main resin and a curing agent, wherein the main resin comprises resin A and resin B, the solid content of the resin A is 25-35%, the viscosity is 90-110mPa.S, the 100% elastic modulus is 5-7MPA, the elongation at break is more than 350%, the maximum tensile strength is more than 30MPA, the solid content of the resin B is 28-40%, and the viscosity is 280-360 mPa.S. According to the invention, by selecting the specific main resin and the curing agent for compounding, on one hand, the performance of resisting chemical corrosion can be improved, and on the other hand, the addition range of the curing agent can be wider, for example, in the application of leather with a hot stretching process, the phenomenon that a surface treatment layer is pulled to be broken can be prevented by reducing the content of the curing agent, and meanwhile, the problem that the curing effect is influenced by reducing the using amount of the curing agent can be solved by the specific main resin.

Description

Surface treatment agent and leather coated with same
[ technical field ] A method for producing a semiconductor device
The present invention relates to a surface treatment agent and leather coated with the same, which can be applied to interior materials of automobiles.
[ background ] A method for producing a semiconductor device
Leather is widely used as a surface finishing material in many fields such as automobiles and home furnishings, and leather is commonly used, such as genuine leather, polar artificial leather such as PVC artificial leather, and non-polar artificial leather such as TPO artificial leather. Taking the automobile field as an example, the conventional leather has some problems when applied to door panels, instrument panels and other parts, for example, in the vacuum forming process, a hot stretching process is required, the surface treating agent of the conventional leather is easily broken in the processing process, and the higher the content of the curing agent is, the more easily broken; for another example, leather is frequently contacted with a driver as an automobile interior material, and is easily contacted with various chemical substances on the driver, such as nail polish, cosmetics, sunscreen cream and the like, and the traditional leather is difficult to meet the requirements of various chemicals; for example, the conventional surface treatment agent for leather is solvent-based, contains various volatile toxic and harmful substances, and is difficult to meet the national standard.
Therefore, it is desirable to provide a new technical solution to solve the above technical problems.
[ summary of the invention ]
The technical problem to be solved by the invention is as follows: provided are a surface treatment agent and leather coated with the same, which has high chemical resistance and can be applied to a process requiring hot stretching.
In order to solve the technical problems, the invention can adopt the following technical scheme: a surface treating agent comprises a main resin and a curing agent, wherein the main resin comprises a resin A and a resin B, the solid content of the resin A is 25-35%, the viscosity is 90-110mPa.S, the 100% elastic modulus is 5-7MPA, the elongation at break is more than 350%, the maximum tensile strength is more than 30MPA, the solid content of the resin B is 28-40%, and the viscosity is 280-360 mPa.S. The solid content of the resin A can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, the viscosity of the resin A can be 90mPa.S, 92mPa.S, 94mPa.S, 96mPa.S, 98mPa.S, 100mPa.S, 102mPa.S, 104mPa.S, 106mPa.S, 108mPa.S, 110mPa.S, and the 100% elastic modulus of the resin A can be 5MPA, 6MPA, 7 MPA; the solid content of the resin B can be 28%, 30%, 32%, 34%, 36%, 38%, 40%, and the viscosity of the resin B can be 280mPa.S, 285mPa.S, 290mPa.S, 295mPa.S, 300mPa.S, 305mPa.S, 310mPa.S, 315mPa.S, 320mPa.S, 325mPa.S, 330mPa.S, 335mPa.S, 340mPa.S, 345mPa.S, 350mPa.S, 355mPa.S, 360 mPa.S.
According to the invention, by selecting the specific main resin and the curing agent to be compounded, on one hand, the performance of resisting chemical corrosion can be achieved, on the other hand, the addition range of the curing agent can be wider, for example, in the application of artificial leather with a hot stretching process, the phenomenon that a surface treatment layer is pulled to be broken can be prevented by reducing the content of the curing agent, and meanwhile, the problem that the curing effect is influenced by reducing the consumption of the curing agent can be solved by the specific main resin. The leather product can meet the requirement of hot stretching, can also meet the effect of resisting the corrosion of chemicals, and can also ensure the curing effect of the surface treating agent by compounding the main resin and the curing agent.
In the present invention, both the resin a and the resin B are preferably polyurethane resins. The main resin comprises 50-85% of the resin A and 15-50% of the resin B by weight percentage based on the total weight of the main resin. The content of the resin A can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, and the content of the resin B can be 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%.
The main resin is used in an amount of 50 to 60% by weight, for example, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60% or any value within a range between any two of these values, based on the total weight of the surface treatment agent of the present invention.
In the present invention, the curing agent functions to react with the main resin, and the member has a more dense paint film structure. The curing agent can be one or more of polyisocyanate curing agent, polycarbodiimide curing agent, oxazoline curing agent and aromatic amine curing agent, preferably isocyanate curing agent, and has less impurities and small influence on the surface treatment agent system. The curing agent is used in an amount of 0.2 to 0.5 percent by weight, such as 0.2%, 0.3%, 0.4%, 0.5% or any value within a range between any two of these values, based on the total weight of the surface treatment agent of the present invention.
In the present invention, the water is preferably deionized water, and is used in an amount of 10 to 25% by weight, for example, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 25% or any value within a range between any two of these values, based on the total weight of the surface treatment agent of the present invention.
In the present invention, the function of the cosolvent is to facilitate better dispersion of the resin a and the resin B in water, and a person skilled in the art can select a conventional cosolvent according to the present invention, for example, an alcoholic cosolvent, such as a small molecular alcohol like isopropanol. The co-solvent is used in an amount of 5 to 20% co-solvent, for example, 5%, 7%, 9%, 11%, 13%, 15%, 17%, 19%, 20% or any value within a range between any two of these values, by weight percent based on the total weight of the surface treatment agent of the present invention.
In the invention, the hand feeling auxiliary agent can reduce the surface tension of the surface treatment agent and reduce the contact angle, so that chemical liquid drops are not easy to be paved on the surface treatment agent. The person skilled in the art can select conventional hand aids, for example, silicones, according to the invention. The hand feel aid is used in an amount of 0 to 10%, preferably 5 to 10%, for example 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any number in the range between any two of these values, in weight percent based on the total weight of the surface treatment agent of the present invention.
In the present invention, the defoaming agent is used for eliminating the problem that foam is easily generated when the surface treatment agent is formulated because the surface tension of water is large, and the defoaming agent may be selected from polysiloxane-polyether copolymer. The defoamer is used in an amount of 0.5 to 0.75 percent by weight, such as 0.5%, 0.6%, 0.7%, 0.75% or any value within a range between any two of these values, based on the total weight of the surface treatment agent of the present invention.
In the present invention, the dispersant functions to facilitate the dispersion of the surface treatment agent on the surface of the coated object, and the dispersant may be selected from polyether-modified silicones. The dispersant is used in an amount of 0.3 to 0.6%, such as 0.3%, 0.4%, 0.5%, 0.6% or any value within a range between any two of these values, by weight percent based on the total weight of the surface treatment agent of the present invention.
In the present invention, the thickener, which may be selected from polyurethane thickeners or methacrylic acid and acrylate copolymers, functions to adjust the viscosity. The thickener is used in an amount of 0 to 2% by weight, preferably 1 to 2% by weight, based on the total weight of the surface treatment agent of the present invention.
In order to solve the technical problems, the invention can also adopt the following technical scheme: the leather comprises a surface layer and a surface treatment layer positioned on the surface of the surface layer, wherein the surface treatment layer is prepared from the surface treatment agent.
In the present invention, the skin layer may be a dermis, a polar skin layer, a non-polar skin layer, such as a PVC skin layer, a TPO skin layer, a PU skin layer, and the like.
[ detailed description ] embodiments
The invention is further illustrated by the following examples and comparative examples.
Example 1
Preparation of TPO artificial leather
Step one, preparation of TPO skin layer
70 parts by weight of random copolymer polypropylene, 15 parts by weight of linear low density polyethylene, 10 parts by weight of polyolefin elastomer, 5 parts by weight of thermoplastic vulcanized rubber and 2 parts by weight of stabilizer are added into an extruder, and the components are heated, melted and uniformly mixed at about 220 ℃. The resulting mixture was then extruded and calendered to produce a 0.6mm TPO skin.
Step two, preparation of surface treatment layer
The components are added into a paint cylinder according to the components and the content of the surface treating agent listed in the table I and the table II, and are stirred for half an hour to be uniformly mixed to form the surface treating agent. On one side of the TPO skin layer prepared in the first step, the prepared surface treatment agent is coated on the upper surface of the TPO skin layer by means of gravure printing, and is heated in an oven of about 110 degrees for about 90 seconds to be dried, so that a surface treatment layer of about 15 microns is obtained.
Step three, hot-pressing compounding of the sponge and the TPO skin layer
And D, directly hot-pressing and compounding the bottom surface of the TPO surface layer coated with the surface treating agent prepared in the step two and sponge serving as a bottom supporting layer on an embossing machine, wherein the hot-pressing and compounding temperature is 170-180 ℃, and preparing the TPO artificial leather.
Examples 2 to 4 and comparative examples 1 to 3
The TPO skin layers and sponges of examples 2 to 4 and comparative examples 1 to 3 were the same as those of example 1, and TPO artificial leather coated with different surface treatment agents was prepared according to the components and contents of the surface treatment agents listed in table one and table two and the method for preparing TPO artificial leather described in example 1.
Testing of TPO Artificial leather
TPO artificial leathers prepared in examples 1-4 and comparative examples 1-3 were tested and analyzed according to the evaluation method TM-6001_ v4 and the test method TP-0000703 in Tesla standards, and the results are shown in Table III.
TABLE I Components and contents of the surface-treating agents of examples 1 to 4 and comparative examples 1 to 3 (in weight percent based on the total weight of the surface-treating agent)
Figure BDA0002867968600000041
Figure BDA0002867968600000051
Table two, examples 1 to 4 and comparative examples 1 to 3 (in the following table, percentages are expressed by weight based on the total weight of the surface treatment agent)
Figure BDA0002867968600000052
TABLE III, test and analysis results of TPO Artificial leather prepared in examples 1-4 and comparative examples 1-3
Figure BDA0002867968600000053
Figure BDA0002867968600000061
As can be seen from the test and analysis results in the above table, the TPO artificial leathers prepared in examples 1-4 all pass the Tesla test on the hot stretch, chemical resistance and curing effect; the surface treatment agents prepared in comparative examples 1 and 2 had poor curing effects and were difficult to be applied to surface coatings of TPO skin layers; the TPO artificial leather prepared in comparative example 3 failed the tesla test for chemical resistance.
It will be appreciated that the above-described embodiments of the invention may be combined with each other to obtain further embodiments, without conflict. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention.
The above embodiments are merely preferred embodiments of the present invention, and not all embodiments are possible. It will be appreciated that those skilled in the art can make many reasonable variations to the present invention without departing from the true spirit and scope of the invention, which should be construed as broadly as the present invention.

Claims (10)

1. A surface treating agent comprises a main resin and a curing agent, and is characterized in that: the main resin comprises a resin A and a resin B, wherein the solid content of the resin A is 25-35%, the viscosity is 90-110mPa.S, the 100% elastic modulus is 5-7MPA, the elongation at break is more than 350%, the maximum tensile strength is more than 30MPA, the solid content of the resin B is 28-40%, and the viscosity is 280-360 mPa.S.
2. The surface treating agent according to claim 1, wherein: the resin A and the resin B are both polyurethane resin.
3. The surface treating agent according to claim 1, wherein: the main resin comprises 50-85% of the resin A and 15-50% of the resin B by weight percentage based on the total weight of the main resin.
4. The surface treating agent according to claim 1, wherein: the curing agent is one or more of polyisocyanate curing agent, polycarbodiimide curing agent, oxazoline curing agent and aromatic amine curing agent.
5. The surface treating agent according to claim 1, wherein: based on the total weight of the surface treating agent, the surface treating agent comprises, by weight, 50-60% of the main resin, 0.2-0.5% of the curing agent, 10-25% of water, 5-20% of a cosolvent, 0-10% of a hand feeling auxiliary agent, 0.5-0.75% of a defoaming agent, 0.3-0.6% of a dispersing agent and 0-2% of a thickening agent.
6. The surface treating agent according to claim 5, wherein: based on the total weight of the surface treating agent, the surface treating agent comprises, by weight, 50-60% of the main resin, 0.2-0.5% of the curing agent, 10-25% of the water, 5-20% of the cosolvent, 5-10% of the hand feeling aid, 0.5-0.75% of the antifoaming agent, 0.3-0.6% of the dispersant and 1-2% of the thickener.
7. The surface treating agent according to claim 5, wherein: the water is deionized water.
8. A leather, characterized in that: the leather comprises a skin layer and a surface treatment layer positioned on the surface of the skin layer, wherein the surface treatment layer is prepared from the surface treatment agent as defined in any one of claims 1 to 7.
9. Leather as claimed in claim 8, wherein: the epidermal layer is a dermis, a polar epidermal layer or a non-polar epidermal layer.
10. Leather as claimed in claim 9, wherein: the skin layer is a PVC skin layer or a TPO skin layer or a PU skin layer.
CN202011594977.2A 2020-12-29 2020-12-29 Surface treating agent and leather coated with the same Active CN114752291B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745041A (en) * 1968-08-26 1973-07-10 Minnesota Mining & Mfg Composition and method for surfacing leathers and leather substitutes based on filled polyurethane latex
KR101739689B1 (en) * 2016-04-19 2017-05-24 강남제비스코 주식회사 polyurethane resin composition for artificial leather impregnation
CN107022334A (en) * 2016-12-27 2017-08-08 丽水学院 Use for synthetic leather can be molded the preparation method of bonding aqueous surface-treating agent
CN111349382A (en) * 2018-12-24 2020-06-30 贝内克-长顺汽车内饰材料（张家港）有限公司 Artificial leather treatment agent and artificial leather obtained therefrom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745041A (en) * 1968-08-26 1973-07-10 Minnesota Mining & Mfg Composition and method for surfacing leathers and leather substitutes based on filled polyurethane latex
KR101739689B1 (en) * 2016-04-19 2017-05-24 강남제비스코 주식회사 polyurethane resin composition for artificial leather impregnation
CN107022334A (en) * 2016-12-27 2017-08-08 丽水学院 Use for synthetic leather can be molded the preparation method of bonding aqueous surface-treating agent
CN111349382A (en) * 2018-12-24 2020-06-30 贝内克-长顺汽车内饰材料（张家港）有限公司 Artificial leather treatment agent and artificial leather obtained therefrom

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