CN114539914A - Organic silicon coating capable of being coated on polyurethane synthetic leather and using method thereof - Google Patents

Organic silicon coating capable of being coated on polyurethane synthetic leather and using method thereof Download PDF

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Publication number
CN114539914A
CN114539914A CN202210097130.6A CN202210097130A CN114539914A CN 114539914 A CN114539914 A CN 114539914A CN 202210097130 A CN202210097130 A CN 202210097130A CN 114539914 A CN114539914 A CN 114539914A
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synthetic leather
coating
silicone oil
organic silicon
polyurethane synthetic
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谷祥辉
骆科
郭易平
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Guangdong Sijia New Material Technology Co ltd
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Guangdong Sijia New Material Technology 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • 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
    • C09D7/20—Diluents or solvents
    • 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
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • C08K2003/3036—Sulfides of zinc

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to the technical field of coatings, in particular to an organic silicon coating capable of being coated on polyurethane synthetic leather and a using method thereof. The application method of the organic silicon coating comprises the steps of coating the organic silicon coating on the surface of the PU synthetic leather in a spraying or roller coating mode, and then drying in an oven at the temperature of 130-. The coating formed on the surface of the PU synthetic leather by the organic silicon coating has high adhesive force and is not easy to peel.

Description

Organic silicon coating capable of being coated on polyurethane synthetic leather and using method thereof
Technical Field
The invention relates to the technical field of coatings, in particular to an organic silicon coating capable of being coated on polyurethane synthetic leather and a using method thereof.
Background
Polyurethane and PVC are the most main chemical raw materials for coating artificial synthetic leather at present. The main components of the coated chemical material can be classified into: polyurethane synthetic leather, PVC synthetic leather, and semi-Pu synthetic leather. Various synthetic leathers are manufactured by leather factories through chemical material proportioning, coating process, base fabric material, surface texture, post treatment and the like, and are widely applied to the fields of furniture, decoration, packaging, automobiles, bags, shoe materials and the like, thereby basically meeting the requirements of people on the leather.
Polyurethane synthetic leather, even including the surface treatment in the later stage, shows general water resistance, solvent resistance, graffiti resistance and weather resistance after being cured and molded due to the characteristics of chemical materials of the polyurethane synthetic leather, and with new requirements of the world on environmental protection and carbon emission, solvents commonly used in leather industries such as DMF (dimethyl formamide) and the like are forbidden by the European Union, and with the fierce market competition, the domestic leather industry faces brand-new opportunities and challenges.
The organosilicon material is widely concerned due to unique stability, excellent weather resistance, good film forming property, shrinkage and air permeability, and the existing common technology is mainly that polyurethane is modified to connect silicon, or organosilicon is modified to connect polyurethane, or organosilicon is used as additive compound of polyurethane coating, the actual effect and the comprehensive performance of the organosilicon material are improved to a certain extent, and the organosilicon material belongs to polyurethane strictly. Such as: oil stain and solvent resistance, weather resistance, etc.
In addition, a few silicone treatment agents developed by manufacturers capable of directly coating polyurethane synthetic leather are ubiquitous: unstable adhesive force, slightly bright glossiness, short continuous operation time, single touch, poor flexing resistance, inadaptation of elastic fabrics and the like. This is also the main reason why this material has not been marketed in recent years.
Disclosure of Invention
The invention provides an organic silicon coating capable of being coated on polyurethane synthetic leather and a coating method thereof, which solve the problem that the adhesion of the coating is unstable when the existing organic silicon coating is coated on the polyurethane synthetic leather.
The invention also provides a using method of the organic silicon coating, which is simple to operate and easy to popularize.
In order to solve the technical problems, the invention adopts the following technical scheme:
the organic silicon coating capable of being coated on the polyurethane synthetic leather comprises the following raw material components in parts by weight:
Figure BDA0003491301240000021
the functional auxiliary agent comprises a flame retardant, an antioxidant and a bacteriostatic agent.
Wherein the organic silicon-based adhesive is hydroxyl silicone oil and vinyl silicone oil.
Wherein the weight ratio of the hydroxyl silicone oil to the vinyl silicone oil is 5-8: 1.
Wherein the hydroxyl silicone oil comprises a first hydroxyl silicone oil with the viscosity of 1200-1300cps and a second hydroxyl silicone oil with the viscosity of 25000-28000 cps.
Wherein the weight ratio of the first hydroxyl silicone oil to the second hydroxyl silicone oil is 3-4: 1.
Wherein the vinyl silicone oil comprises a first vinyl silicone oil with the viscosity of 500-1000cps and a second vinyl silicone oil with the viscosity of 80000-90000 cps.
Wherein the weight ratio of the first vinyl silicone oil to the second vinyl silicone oil is 8-10: 1.
Wherein the catalyst is a chloroplatinic acid catalyst.
Wherein the filler is at least one of nano calcium carbonate, hydrophobic white carbon black and nano silicon dioxide.
Wherein the cross-linking agent comprises at least one of methyl tributyl ketoxime silane, tetrabutoxime silane, methyl triacetoxy silane and methyl triacetoxy silane.
Wherein the coupling agent is at least one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltriethoxysilane, isocyanatopropyltriethoxysilane and gamma-aminopropyltrimethoxysilane.
Wherein the weight ratio of the flame retardant to the antioxidant to the bacteriostatic agent is 1: 1-3:3-5.
Wherein the flame retardant is at least one of aluminum hydroxide, magnesium hydroxide and zinc oxide.
Wherein the antioxidant is Monomethyl Ether (MEQH) of hydroquinone or pentaerythritol tetrakis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate).
The bacteriostatic agent is at least one of nano titanium dioxide, nano zinc oxide, nano zinc sulfide, nano cadmium sulfide and nano silver oxide.
The invention also provides a use method of the organic silicon coating capable of being coated on the polyurethane synthetic leather, which comprises the steps of coating the organic silicon coating on the surface of the PU synthetic leather in a spraying or roller coating mode, and drying in a drying oven at the temperature of 130-150 ℃.
The invention has the beneficial effects that:
after the organic silicon coating is coated on the surface of the PU synthetic leather, a high-molecular chain segment of an organic silicon compound containing a reactive group is strongly catalyzed at high temperature and carries out organic chemical reaction with active groups on the surface of Pu, so that the coating formed on the surface of the PU synthetic leather by the organic silicon coating has excellent adhesive force and is not easy to fall off.
The organic solvent contained in the organic silicon coating can quickly infiltrate into the surface of the synthetic leather, molecules on the surface of the synthetic leather are subjected to unbalanced intermolecular force while thermosetting coagulation is carried out, the surface area tends to be extremely small due to free energy and surface tension, and the intermolecular force is synergetic under the action of van der Waals force, so that cohesive bonding with a Pu layer is completed during curing film forming, the anchoring effect of the organic silicon on the Pu layer is realized, and the adhesion performance of the organic silicon coating is further improved.
The wear resistance and the scratch resistance of the PU synthetic leather coated by the organic silicon coating are effectively improved, and the hydrolysis resistance, the ageing resistance, the flame retardant property and the mildew-proof and bacteriostatic properties are also greatly improved.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
An organic silicon coating capable of being coated on polyurethane synthetic leather comprises the following raw material components in parts by weight:
Figure BDA0003491301240000031
Figure BDA0003491301240000041
the functional auxiliary agent comprises the following components in percentage by weight of 1: 1:3 of flame retardant, antioxidant and bacteriostatic agent.
Wherein the organic silicon-based adhesive is hydroxyl silicone oil and vinyl silicone oil.
Wherein the weight ratio of the hydroxyl silicone oil to the vinyl silicone oil is 5: 1.
Wherein the hydroxyl silicone oil comprises a first hydroxyl silicone oil with the viscosity of 1200cps and a second hydroxyl silicone oil with the viscosity of 25000 cps.
Wherein the weight ratio of the first hydroxyl silicone oil to the second hydroxyl silicone oil is 3: 1.
Wherein the vinyl silicone oil comprises a first vinyl silicone oil with a viscosity of 500cps and a second vinyl silicone oil with a viscosity of 80000 cps.
Wherein the weight ratio of the first vinyl silicone oil to the second vinyl silicone oil is 8: 1.
Wherein the catalyst is a chloroplatinic acid catalyst.
Wherein the filler is nano calcium carbonate.
Wherein the cross-linking agent is methyl tributyl ketoxime silane.
Wherein the coupling agent is gamma-aminopropyl triethoxysilane.
Wherein the flame retardant is aluminum hydroxide.
The bacteriostatic agent is nano titanium dioxide.
The solvent is No. 150 solvent oil.
The application method of the organic silicon coating capable of being coated on the polyurethane synthetic leather comprises the steps of coating the organic silicon coating on the surface of the PU synthetic leather in a roller coating mode, then drying in an oven at 130 ℃ for 5min to form a first coating, coating a second layer of organic silicon coating on the surface of the first coating, drying in the oven at 130 ℃ for 5min to form a second coating, coating a third layer of organic silicon coating on the surface of the second coating, drying in the oven at 130 ℃ for 5min to form a third coating, and finishing coating the organic silicon coating on the PU synthetic leather.
Example 2
The invention provides an organic silicon coating capable of being coated on polyurethane synthetic leather, which comprises the following raw material components in parts by weight:
Figure BDA0003491301240000042
Figure BDA0003491301240000051
the functional auxiliary agent comprises a flame retardant, an antioxidant and a bacteriostatic agent.
Wherein the organic silicon-based adhesive is hydroxyl silicone oil and vinyl silicone oil.
Wherein the weight ratio of the hydroxyl silicone oil to the vinyl silicone oil is 6.5: 1.
Wherein the hydroxyl silicone oil comprises a first hydroxyl silicone oil with the viscosity of 1250cps and a second hydroxyl silicone oil with the viscosity of 26500 cps.
Wherein the weight ratio of the first hydroxyl silicone oil to the second hydroxyl silicone oil is 3.5: 1.
Wherein the vinyl silicone oil comprises a first vinyl silicone oil having a viscosity of 750cps and a second vinyl silicone oil having a viscosity of 85000 cps.
Wherein the weight ratio of the first vinyl silicone oil to the second vinyl silicone oil is 9: 1.
Wherein the catalyst is a chloroplatinic acid catalyst.
Wherein the filler is hydrophobic white carbon black.
Wherein the cross-linking agent comprises methyltripropoximinosilane.
Wherein the coupling agent is gamma- (2, 3-epoxypropoxy) propyl triethoxysilane.
Wherein the weight ratio of the flame retardant to the antioxidant to the bacteriostatic agent is 1: 2:4.
Wherein the flame retardant is magnesium hydroxide.
Wherein the antioxidant is pentaerythritol tetrakis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate).
The bacteriostatic agent is nano zinc oxide.
The solvent is No. 150 solvent oil.
The application method of the organic silicon coating capable of being coated on the polyurethane synthetic leather comprises the steps of coating the organic silicon coating on the surface of the PU synthetic leather in a roll coating mode, then baking for 4min in a baking oven at 140 ℃ to form a first coating, then coating a second layer of organic silicon coating on the surface of the first coating, baking for 4min in the baking oven at 140 ℃ to form a second coating, finally coating a third layer of organic silicon coating on the surface of the second coating, baking for 4min in the baking oven at 140 ℃ to form a third coating, and finishing coating the organic silicon coating on the PU synthetic leather.
Example 3
The invention provides an organic silicon coating capable of being coated on polyurethane synthetic leather, which comprises the following raw material components in parts by weight:
Figure BDA0003491301240000061
the functional auxiliary agent comprises a flame retardant, an antioxidant and a bacteriostatic agent.
Wherein the organic silicon-based adhesive is hydroxyl silicone oil and vinyl silicone oil.
Wherein the weight ratio of the hydroxyl silicone oil to the vinyl silicone oil is 8: 1.
Wherein the hydroxyl silicone oil comprises a first hydroxyl silicone oil with the viscosity of 1300cps and a second hydroxyl silicone oil with the viscosity of 28000 cps.
Wherein the weight ratio of the first hydroxyl silicone oil to the second hydroxyl silicone oil is 4: 1.
Wherein the vinyl silicone oil comprises a first vinyl silicone oil having a viscosity of 1000cps and a second vinyl silicone oil having a viscosity of 90000 cps.
Wherein the weight ratio of the first vinyl silicone oil to the second vinyl silicone oil is 10: 1.
Wherein the catalyst is a chloroplatinic acid catalyst.
Wherein the filler is nano silicon dioxide.
Wherein the crosslinking agent comprises tetrabutoximosilane.
Wherein the coupling agent is isocyanatopropyl triethoxysilane.
Wherein the weight ratio of the flame retardant to the antioxidant to the bacteriostatic agent is 1: 3:5.
Wherein the flame retardant is zinc oxide.
Wherein the antioxidant is pentaerythritol tetrakis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate).
The bacteriostatic agent is nano-zinc sulfide.
The solvent is No. 150 solvent oil.
The application method of the organic silicon coating capable of being coated on the polyurethane synthetic leather comprises the steps of coating the organic silicon coating on the surface of the PU synthetic leather in a roller coating mode, then baking for 3min in a baking oven at 150 ℃ to form a first coating, then coating a second layer of organic silicon coating on the surface of the first coating, baking for 3min in the baking oven at 150 ℃ to form a second coating, finally coating a third layer of organic silicon coating on the surface of the second coating, baking for 3min in the baking oven at 150 ℃ to form a third coating, and finishing coating the organic silicon coating on the PU synthetic leather.
Example 4
Example 4 differs from example 2 in that the silicone-based glue in example 4 contains only the first hydroxy silicone oil having a viscosity of 1200 cps.
Comparative example 1
Comparative example 1 differs from example 2 in that comparative example 1 does not add a crosslinking agent.
Comparative example 2
Comparative example 2 differs from example 2 in that comparative example 2 does not add a filler.
Performance testing
1. Peel Strength test
The experiments were carried out as specified in DIN53273 with the following evaluation criteria:
evaluation criteria:
general grade >1.5kgf/cm in machine direction, >1.2kgf/cm in transverse direction;
the reinforcement level is more than 2.5kgf/cm in the longitudinal direction and more than 2kgf/cm in the transverse direction;
the super strength grade is greater than 3kgf/cm in the longitudinal direction and 2.5kgf/cm in the transverse direction.
2. Abrasion resistance test
The experiment was carried out as specified in QB-T2726-2005, using a CS-10 grinding wheel, under an experimental condition load of 1000g and a test revolution of 1000 revolutions.
Evaluation criteria:
grade 1 is evident;
level 2 is obvious;
grade 3 can be distinguished;
grade 4 is difficult to distinguish;
grade 5 could not be distinguished.
3. Test of Corrosion resistance
The coating surfaces of the PU synthetic leather coated with the silicone coatings of examples 1 to 4 and comparative examples 1 and 2 were immersed in a hydrochloric acid solution having a pH of 3, and it was observed every day whether the silicone coating was corroded and damaged by acid.
The coatings formed on the surfaces of the PU synthetic leather in examples 1 to 4 and comparative examples 1 and 2 were subjected to peel strength test, abrasion resistance test and corrosion resistance test according to the methods described above, and the test results are recorded in the following table.
Figure BDA0003491301240000081
According to test results, the organic silicon coating can form a coating with excellent adhesion performance on the surface of the PU synthetic leather, the formed coating has high wear resistance, and when high-viscosity and low-viscosity organic silicon oil is compounded, the coating can form a compact coating on the surface of the PU synthetic leather, so that the corrosion resistance of the coating is greatly improved. The coating formed on the surface of the PU synthetic leather by the coating has smooth surface and fine hand feeling.
The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Claims (10)

1. The organic silicon coating capable of being coated on polyurethane synthetic leather is characterized in that: the material comprises the following raw material components in parts by weight:
Figure FDA0003491301230000011
the functional auxiliary agent comprises a flame retardant, an antioxidant and a bacteriostatic agent.
2. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the organic silicon-based adhesive is hydroxyl silicone oil and vinyl silicone oil.
3. The silicone coating applicable to polyurethane synthetic leather according to claim 2, wherein: the hydroxyl silicone oil comprises a first hydroxyl silicone oil with the viscosity of 1200-1300cps and a second hydroxyl silicone oil with the viscosity of 25000-28000 cps.
4. The silicone coating applicable to polyurethane synthetic leather according to claim 2, wherein: the vinyl silicone oil comprises a first vinyl silicone oil with the viscosity of 500-1000cps and a second vinyl silicone oil with the viscosity of 80000-90000 cps.
5. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the catalyst is a chloroplatinic acid catalyst.
6. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the filler is at least one of nano calcium carbonate, hydrophobic white carbon black and nano silicon dioxide.
7. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the cross-linking agent comprises at least one of methyl tributyl ketoxime silane, tetrabutoxime silane, methyl triacetoxy silane and methyl triacetoxy silane.
8. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the coupling agent is at least one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltriethoxysilane, isocyanatopropyltriethoxysilane and gamma-aminopropyltrimethoxysilane.
9. The silicone coating applicable to polyurethane synthetic leather according to claim 1, wherein: the weight ratio of the flame retardant to the antioxidant to the bacteriostatic agent is 1: 1-3:3-5.
10. The use method of the organic silicon coating capable of being coated on the polyurethane synthetic leather as described in any one of claims 1 to 9, is characterized in that: the organic silicon coating is coated on the surface of the PU synthetic leather in a spraying or roller coating mode and then dried in an oven at the temperature of 130-150 ℃.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1161040A (en) * 1997-08-08 1999-03-05 Toshiba Silicone Co Ltd Coating composition for artificial leather and artificial leather coated therewith
CN109056349A (en) * 2018-09-03 2018-12-21 江苏纳恩新材料有限公司 Half silicon synthetic leather of one kind and preparation method thereof
CN109575796A (en) * 2018-11-07 2019-04-05 天津圣金特汽车配件有限公司 A kind of the aluminium alloy wheel hub formulation for coating material and its manufacturing process of high adhesion force
CN111073505A (en) * 2019-12-30 2020-04-28 昆山裕凌导热科技有限公司 Nanometer anti-freezing coating material and preparation method thereof
CN113512355A (en) * 2021-08-10 2021-10-19 成都硅宝科技股份有限公司 Organic silicon coating with weather resistance, salt mist resistance and convenience in construction
CN113683955A (en) * 2021-10-09 2021-11-23 广东雷能电力集团有限公司 Composite organic silicon coating and preparation method and application thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1161040A (en) * 1997-08-08 1999-03-05 Toshiba Silicone Co Ltd Coating composition for artificial leather and artificial leather coated therewith
CN109056349A (en) * 2018-09-03 2018-12-21 江苏纳恩新材料有限公司 Half silicon synthetic leather of one kind and preparation method thereof
CN109575796A (en) * 2018-11-07 2019-04-05 天津圣金特汽车配件有限公司 A kind of the aluminium alloy wheel hub formulation for coating material and its manufacturing process of high adhesion force
CN111073505A (en) * 2019-12-30 2020-04-28 昆山裕凌导热科技有限公司 Nanometer anti-freezing coating material and preparation method thereof
CN113512355A (en) * 2021-08-10 2021-10-19 成都硅宝科技股份有限公司 Organic silicon coating with weather resistance, salt mist resistance and convenience in construction
CN113683955A (en) * 2021-10-09 2021-11-23 广东雷能电力集团有限公司 Composite organic silicon coating and preparation method and application thereof

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