CN113045980A - Surface protective coating, preparation method thereof and synthetic sleeper - Google Patents
Surface protective coating, preparation method thereof and synthetic sleeper Download PDFInfo
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- CN113045980A CN113045980A CN201911380861.6A CN201911380861A CN113045980A CN 113045980 A CN113045980 A CN 113045980A CN 201911380861 A CN201911380861 A CN 201911380861A CN 113045980 A CN113045980 A CN 113045980A
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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
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3237—Polyamines aromatic
- C08G18/324—Polyamines aromatic containing only one aromatic ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
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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
- 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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
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- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- 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
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
A surface protective coating and its preparation method and synthetic sleeper, the raw materials of the said surface protective coating are made up of first component and second component; the first component comprises the following components in parts by weight: 85-99 parts of one or more of amino-terminated polyether, polymer polyol and amino compound and 5-10 parts of flame retardant; the second component includes a polyisocyanate. The preparation method comprises the steps of uniformly mixing the first component with the second component, and coating the mixture on the surface of the synthetic sleeper. The sleeper is a fiber reinforced polyurethane foam synthetic sleeper coated with the coating. The surface protection coating has predictable thickness and predictable hardness, can realize one-time molding of repair and coloring, and achieves the effects of process reduction, cost reduction, production efficiency improvement, and better wear resistance and water resistance which are equivalent to the hardness of a synthetic sleeper. In addition, the coating layer provided by the invention is a non-solvent type bi-component material, so that the problems of environmental pollution, damage to a human body, poor surface impact resistance and the like are avoided.
Description
Technical Field
The present invention relates to material technology, and is especially one kind of surface protecting paint and its preparation process and composite sleeper.
Background
At present, the surface protective layer of the domestic synthetic sleeper is mainly a solvent-type high-molecular coating layer, and has the advantages of high price, great environmental pollution and human harm, easy falling, poor impact resistance on the surface, low preparation efficiency and higher processing cost. For example, CN 209076986U, which proposes to improve efficiency by spraying. For spray coating, while convenient to operate, the cure rate of the coating is unpredictable and still affects tie spray coating operations.
Disclosure of Invention
The invention provides a surface protective coating, a preparation method thereof and a synthetic sleeper, in particular to a surface coating layer for a fiber-reinforced polyurethane foam synthetic sleeper, wherein the coating layer is a non-solvent type bi-component material, has good adhesive force, predictable coating thickness and predictable hardness, can realize one-time molding of repair coloring, and achieves the effects of process reduction, cost reduction, production efficiency improvement, hardness equivalent to that of the synthetic sleeper, good wear resistance and water resistance.
The invention provides a surface protective coating, which is prepared from the following raw materials of a first component and a second component; the first component comprises the following components in parts by weight: amine-terminated polyether, polymer polyol, 85-99 parts (preferably 85-95 parts) of amino compound and 5-10 parts of flame retardant; the second component comprises a polyisocyanate; the weight ratio of the first component to the second component is 1 (0.95-1.1).
Optionally, the first component is composed of an amine-terminated polyether, a polymer polyol, an amino compound and a flame retardant, and the second component is a polyisocyanate.
In the surface protective coating provided by the invention, the first component comprises the following components in parts by weight: amine-terminated polyether, polymer polyol and amino compound 85-99 parts, flame retardant 5-10 parts, antioxidant 0-0.4 part, ultraviolet absorber 0-0.4 part and colorant 0-1 part (preferably 0-0.2 part);
preferably, the first component comprises, in parts by weight: 70 parts of polymer polyol, 13.9 parts of amino-terminated polyether, 6 parts of amino compound, 10 parts of flame retardant, 0.04 part of antioxidant, 0.04 part of ultraviolet absorber and 0.02 part of colorant.
Preferably, the first component consists of a polymer polyol, an amine-terminated polyether, an amino compound, a flame retardant, an antioxidant, an ultraviolet light absorber, and a colorant.
In the surface protective coating provided by the invention, the weight ratio of the amino-terminated polyether, the polymer polyol and the amino compound is (1-20): (60-80): (5-27); the preferred weight ratio is (3-15): (60-80): 5-27).
In the surface protective coating provided by the invention, the polymer polyol is selected from one or two of polyether polyol and polyester polyol;
optionally, the polymer polyol is a single component or a mixture of multiple components having a functionality of between 2 and 5.5;
optionally, the polymer polyol is polyether polyol, and the polyether polyol is one or more selected from sucrose polyol, glycerol polyol, ethylene glycol polyol and propylene glycol polyol.
In the surface protective coating provided by the invention, the amino compound is selected from one or more of diethyltoluenediamine, dimethylthiotoluenediamine, diaminodimethylthiochlorobenzene and bis-sec-aminodiphenylmethane.
In the surface protection coating provided by the invention, the amino-terminated polyether is selected from three types of amino-terminated polyether, namely polyoxypropylene triamine taking glycerol as an initiator, polyoxypropylene triamine taking trimethylolpropane as an initiator and polyoxyethylene-propylene oxide diamine; preferably, the amine-terminated polyether is selected from Jeffamine T-3000, Jeffamine THF100, Versalink P-250, Versalink P-650, Versalink P-1000.
In the surface protective coating provided by the invention, the flame retardant is selected from one or more of trichloropropyl phosphate (TCPP), tris (2-chloroethyl) phosphate, tris (dichloropropyl) phosphate and tetrakis (2-chloroethyl) ethylene diphosphate;
optionally, the antioxidant is selected from one or more of antioxidant 1035, antioxidant 1010, antioxidant 168, antioxidant 245, antioxidant 264, antioxidant 3114, antioxidant 1024, antioxidant 1790, antioxidant 1315, diphenylisodecyl phosphite (DPDP) and triphenyl phosphite (TPP);
optionally, the ultraviolet light absorber is selected from one or more of UV571, UV328 and UV 531.
In the surface protective coating provided by the invention, the polyisocyanate is selected from one or more of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, tetramethyl dimethylene diisocyanate, trimethyl hexamethylene diisocyanate and xylylene diisocyanate;
optionally, the polyisocyanate is selected from one or more of 5005, PM200, 44V20, PM400, Wannate8314, Wannate8316, Wannate 8324, MIPS, MDI50 and CDC.
On the other hand, the invention also provides a preparation method of the surface protective coating, which comprises the following steps:
(1) uniformly mixing amino terminated polyether, polymer polyol, amino compound, flame retardant, antioxidant, ultraviolet absorber and colorant, and placing the mixture in a reaction vessel;
(2) placing the polyisocyanate in another reaction vessel;
(3) setting the temperature of the reaction container in the step (1) and the temperature of the reaction container in the step (2) to be 60-70 ℃, and then uniformly blending the raw materials in the two containers to obtain the surface protective coating.
Optionally, the preparation method of the surface protective coating consists of the steps.
In another aspect, the present invention provides a sleeper coated with the above surface protective coating, the sleeper being a fiber-reinforced polyurethane foam composite sleeper;
in the synthetic sleeper provided by the invention, the thickness of the surface protective coating on the surface of the sleeper is 0.01-2 mm;
in the composite sleeper provided by the invention, the hardness of the sleeper coated with the surface protection coating is 30A-90D;
in the composite sleeper provided by the invention, the surface of the sleeper can be a smooth plane; the surface of the sleeper can also be a surface with bulges;
in the composite sleeper provided by the invention, in the surface with the protrusions, the size of the protrusions is 0.1-2 mm; preferably, the bulges are spherical or hemispherical, and the distance between every two bulges is 0-2 mm.
The color of the colorant can be controlled at will;
the two-component system can generate one or two of carbamate and carbamido and any proportion of the two components after reaction.
The invention has the beneficial effects that:
the surface protective coating provided by the invention has the advantages of predictable coating thickness and predictable hardness, can realize one-time molding of repair and coloring, and achieves the effects of process reduction, cost reduction, production efficiency improvement, hardness equivalent to that of a synthetic sleeper, good wear resistance and water resistance. The surface abrasion generated in the mounting and carrying process of the sleeper can be effectively solved, and the sleeper has certain elasticity and can be buffered and damped. In addition, the coating layer provided by the invention is a non-solvent type bi-component material, so that the problems of environmental pollution, damage to a human body, poor surface impact resistance and the like are avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Other advantages of the invention may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below. It should be noted that the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.
The embodiment of the invention provides a surface protective coating, which is prepared from the following raw materials of a first component and a second component; the first component comprises the following components in parts by weight: amine-terminated polyether, polymer polyol, 85-99 parts (preferably 85-95 parts) of amino compound and 5-10 parts of flame retardant; the second component comprises a polyisocyanate; the weight ratio of the first component to the second component is 1 (0.95-1.1).
Optionally, the first component is composed of an amine-terminated polyether, a polymer polyol, an amino compound and a flame retardant, and the second component is a polyisocyanate.
In an embodiment of the present invention, the first component comprises, in parts by weight: amine-terminated polyether, polymer polyol and amino compound 85-99 parts, flame retardant 5-10 parts, antioxidant 0-0.4 part, ultraviolet absorber 0-0.4 part and colorant 0-1 part (preferably 0-0.2 part);
in the embodiment of the present invention, preferably, the first component includes, by weight: 70 parts of polymer polyol, 13.9 parts of amino-terminated polyether, 6 parts of amino compound, 10 parts of flame retardant, 0.04 part of antioxidant, 0.04 part of ultraviolet absorber and 0.02 part of colorant.
In the embodiment of the present invention, preferably, the first component is composed of polymer polyol, amine-terminated polyether, amino compound, flame retardant, antioxidant, ultraviolet light absorber and colorant.
In the embodiment of the invention, the weight ratio of the amino-terminated polyether, the polymer polyol and the amino compound is (1-20): 60-80): 5-27; the preferred weight ratio is (3-15): (60-80): 5-27).
In the present embodiment, the polymer polyol is selected from one or both of polyether polyol and polyester polyol;
in embodiments of the present invention, optionally, the polymer polyol is a single component or a mixture of multiple components having a functionality between 2 and 5.5;
in an embodiment of the present invention, optionally, the polymer polyol is a polyether polyol, and the polyether polyol is selected from one or more of sucrose polyol, glycerol polyol, ethylene glycol polyol, and propylene glycol polyol.
In an embodiment of the invention, the amino compound is selected from one or more of diethyltoluenediamine, dimethylthiotoluenediamine, diaminodimethylthiochlorobenzene and bis-sec-butylaminodiphenylmethane.
In the embodiment of the invention, the amine-terminated polyether is selected from polypropylene oxide triamine taking glycerol as an initiator, polypropylene oxide triamine taking trimethylolpropane as an initiator, and polyethylene oxide-propylene oxide diamine three types of amine-terminated polyether;
in embodiments of the present invention, preferably, the amine-terminated polyether is selected from Jeffamine T-3000, Jeffamine THF100, Versalink P-250, Versalink P-650, Versalink P-1000.
In an embodiment of the invention, the flame retardant is selected from one or more of trichloropropyl phosphate (TCPP), tris (2-chloroethyl) phosphate, tris (dichloropropyl) phosphate and tetrakis (2-chloroethyl) ethylene diphosphate;
in embodiments of the invention, optionally, the antioxidant is selected from one or more of antioxidant 1035, antioxidant 1010, antioxidant 168, antioxidant 245, antioxidant 264, antioxidant 3114, antioxidant 1024, antioxidant 1790, antioxidant 1315, diphenylisodecyl phosphite (DPDP), and triphenyl phosphite (TPP);
in an embodiment of the invention, optionally, the ultraviolet light absorber is selected from one or more of UV571, UV328 and UV 531.
In an embodiment of the present invention, the polyisocyanate is selected from one or more of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, tetramethylxylylene diisocyanate, trimethylhexamethylene diisocyanate, xylylene diisocyanate;
in an embodiment of the invention, optionally, the polyisocyanate is selected from one or more of 5005, PM200, 44V20, PM400, Wannate8314, Wannate8316, Wannate 8324, MIPS, MDI50 and CDC.
On the other hand, the embodiment of the invention also provides a preparation method of the surface protective coating, which comprises the following steps:
(1) uniformly mixing amino terminated polyether, polymer polyol, amino compound, flame retardant, antioxidant, ultraviolet absorber and colorant, and placing the mixture in a reaction vessel;
(2) placing the polyisocyanate in another reaction vessel;
(3) setting the temperature of the reaction container in the step (1) and the temperature of the reaction container in the step (2) to be 60-70 ℃, and then uniformly blending the raw materials in the two containers to obtain the surface protective coating.
Optionally, the preparation method of the surface protective coating consists of the steps.
In another aspect, embodiments of the present invention provide a sleeper coated with the above-described surface protective coating, wherein the sleeper is a fiber-reinforced polyurethane foam composite sleeper;
in the synthetic sleeper provided by the invention, the thickness of the surface protective coating on the surface of the sleeper is 0.01-2 mm;
in the embodiment of the invention, the hardness of the sleeper coated with the surface protection coating is 30A-90D;
in the embodiment of the invention, the surface of the sleeper can be a smooth plane; the surface of the sleeper can also be a surface with bulges;
in the embodiment of the invention, in the surface with the protrusions, the size of the protrusions is 0.1-2 mm; preferably, the bulges are spherical or hemispherical, and the distance between every two bulges is 0-2 mm.
In the embodiment of the invention, the color of the colorant can be controlled freely;
in the embodiment of the invention, the two-component system can generate one or two of carbamate group and carbamide group and any proportion of the two components after reaction.
In the present examples, the polyether polyol designation 450L was purchased from Dow of Lanxingdong, Inc.; number 307, available from norway corporation; brand 450K, available from north heie, asia east, inc;
in the present example, the amine-terminated polyether is available from Air Products under the trade designation Versalink P-1000; the designation Versalink P-250, available from Air Products, Inc.; the designation Versalink P-650, available from Air Products, Inc.;
in the embodiment of the invention, the trichloropropylphosphate is TCPP (trichloropropylphosphate) which is purchased from Zhang Jiagang Fengtong chemical industry Co., Ltd;
in the present examples, the polyisocyanate designation PM200, was purchased from wanghua chemical group, inc; brand 5005, available from hensman corporation;
in the embodiment of the invention, the colorant is prepared according to production requirements, is purchased from Olympic science and technology Co., Ltd, is prepared into toner by taking an oily substance as a solvent, and does not react with each component in the invention.
Example 1
6.7kg of polyether polyol 450L, 0.403kg of amino terminated polyether Versalink P-250, 1.5kg of diethyl toluene diamine (DEDTA), 100g of colorant, 0.9kg of trichloropropyl phosphate TCPP, 2.1g of UV571 and 2.1g of antioxidant 1035 are uniformly stirred in a stirring kettle, 9.411kg of polyisocyanate PM200 is used as a black material and is placed in another stirring kettle, the temperature of the two components is respectively set to 65 ℃ and 65 ℃, the stirring circulation is carried out for 45min, and the two components are uniformly mixed and then coated on the surface of a sleeper.
The sleeper is a fiber reinforced polyurethane foam synthetic sleeper, 230 × 140 in specification, and the sleeper hardness is 60D when the coating prepared in example 1 is not coated;
coating the surface of the sleeper with a coating; measuring the hardness of the sleeper to be 62D;
the drying time of the sleeper surface coating is 10min, the coating thickness is 0.02mm, and the surface layer is not sagging.
Example 2
6.7kg of polyether polyol 450K, 0.403kg of amino terminated polyether Versalink P-650, 1.5kg of dimethylthiotoluenediamine (DMTDA), 1.2kg of bis-sec-butylaminodiphenylmethane (W6200), 100g of colorant, 0.9kg of trichloropropylphosphate TCPP, 2.1g of UV571 and 2.1g of antioxidant 1035 are stirred uniformly in a stirring kettle, 9.607kg of polyisocyanate PM200 is taken as a black material and placed in another stirring kettle, the temperatures of the two components are respectively set to 68 ℃ and 62 ℃, stirring circulation is carried out for 45min, and the two components are uniformly mixed and then coated on the surface of a sleeper.
The sleeper is a fiber reinforced polyurethane foam composite sleeper, 230 x 140 gauge, and the sleeper hardness is 62D when the coating prepared in example 2 is not coated;
coating the paint on the surface of the sleeper, wherein hemispherical bulges are arranged on the surface of the sleeper, the size of the bulges is 1mm, and the interval of the bulges is continuous; measuring the sleeper hardness to be 58D;
the drying time of the sleeper surface coating is 8min, the coating thickness is 0.2mm, and the surface layer is not sagging.
Example 3
6.7kg of polyether polyol 307, 0.45kg of amino terminated polyether Versalink P-1000, 1.8kg of diaminodimethylthiochlorobenzene, 100g of colorant, 0.9kg of trichloropropylphosphate TCPP, 2.1g of UV571 and 2.1g of antioxidant 1035 are uniformly stirred in a stirring kettle, 9.75kg of polyisocyanate PM200 is used as a black material and is placed in another stirring kettle, the temperatures of the two components are respectively set to 65 ℃ and 60 ℃, stirring circulation is carried out for 30-60min, and the two components are uniformly mixed and then coated on the surface of a sleeper.
The sleeper is a fiber reinforced polyurethane foam composite sleeper, 260 x 260 gauge, and the sleeper hardness is 64D when the coating prepared in example 3 is not coated;
coating the surface of the sleeper with a coating; measuring the hardness of the sleeper to be 60A;
the drying time of the sleeper surface coating is 40min, the coating thickness is 1mm, and the surface layer is not sagging.
Example 4
5.7kg of polyether polyol 450L, 1.2kg of polyether polyol 307, 0.403kg of amine terminated polyether Versalink P-250, 1.5kg of diethyltoluenediamine (DEDTA), 100g of a coloring agent, 0.9kg of trichloropropylphosphate TCPP, 2.1g of UV571 and 2.1g of an antioxidant 1035 are stirred uniformly in a stirring kettle, 9.607kg of polyisocyanate 5005 is taken as a black material and placed in another stirring kettle, the temperatures of the two components are respectively set to 65 ℃ and 62 ℃, stirring circulation is carried out for 50min, and the two components are uniformly mixed and then coated on the surface of a sleeper.
The sleeper is a fiber reinforced polyurethane foam composite sleeper, the specification is 260 x 180, and the sleeper hardness is 62D when the coating prepared in example 4 is not coated;
coating the paint on the surface of the sleeper, wherein hemispherical bulges are arranged on the surface of the sleeper, the size of the bulges is 0.3mm, and the interval between the bulges is 1 mm); measuring the hardness of the sleeper to be 50D;
the drying time of the sleeper surface coating is 20min, the coating thickness is 0.3mm, and the surface layer is not sagging.
Comparative example 1
The single-component polyurethane coating is stirred uniformly, put into the coating for 3 seconds by a rolling brush, and rolled on the surface of the sleeper in a manual rolling coating mode, so that the sleeper is uniformly colored. The chemical components of the polyurethane coating comprise a polyurethane component, a solvent (ethyl acetate), a flame retardant (TCPP), an antioxidant (1010), and an ultraviolet light absorber (UV 571).
The sleeper is a fiber reinforced polyurethane foam synthetic sleeper, the specification is 260-180, and when the coating prepared by implementing the comparative example is not coated, the sleeper hardness is 62D;
and coating the coating on the surface of the sleeper, wherein the sleeper surface is flat. The coating is a solvent-based coating, has strong pungent smell in the curing process of the coating, and has great harm to the environment and human bodies.
Comparative example 2
5.7kg of polyether polyol 450L, 1.2kg of polyether polyol 307, 100g of coloring agent, 0.9kg of trichloropropylphosphate TCPP, 2.1g of UV571 and 2.1g of antioxidant 1035 are uniformly stirred in a stirring kettle, 9.607kg of polyisocyanate 5005 serving as a black material is placed in another stirring kettle, the temperatures of the two components are respectively set to 65 ℃ and 62 ℃, stirring circulation is carried out for 50min, and the two components are uniformly mixed and then coated on the surface of a sleeper.
The sleeper is a fiber reinforced polyurethane foam composite sleeper, the specification is 260 x 180, and the sleeper hardness is 62D when the coating prepared in the comparative example 2 is not coated;
coating the paint on the surface of the sleeper, wherein hemispherical bulges are arranged on the surface of the sleeper, the size of the bulges is 0.3mm, and the interval between the bulges is 1 mm; measuring the hardness of the sleeper to be 50D;
the drying time of the sleeper surface coating is 50min, the coating thickness is 0.3mm, and the surface layer is sagging.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A surface protective coating, wherein the raw material of the surface protective coating consists of a first component and a second component; the first component comprises the following components in parts by weight: amine-terminated polyether, polymer polyol, 85-99 parts of amino compound and 5-10 parts of flame retardant; the second component comprises a polyisocyanate; the weight ratio of the first component to the second component is 1 (0.95-1.1).
2. The surface protective coating of claim 1, wherein the first component comprises, in parts by weight: amine-terminated polyether, polymer polyol and amino compound 85-99 parts, flame retardant 5-10 parts, antioxidant 0-0.4 part, ultraviolet absorber 0-0.4 part and colorant 0-1 part;
preferably, the first component comprises, in parts by weight: 70 parts of polymer polyol, 13.9 parts of amino-terminated polyether, 6 parts of amino compound, 10 parts of flame retardant, 0.04 part of antioxidant, 0.04 part of ultraviolet absorber and 0.02 part of colorant.
3. The surface protective coating of claim 2, wherein preferably the weight ratio of the amine-terminated polyether, polymer polyol and amino compound is (1-20): (60-80): (5-27); the preferred weight ratio is (3-15): (60-80): 5-27).
4. The surface protective coating of claim 2, wherein the polymer polyol is selected from one or both of polyether polyols and polyester polyols;
optionally, the polymer polyol is a single component or a mixture of multiple components having a functionality of between 2 and 5.5;
optionally, the polymer polyol is polyether polyol, and the polyether polyol is one or more selected from sucrose polyol, glycerol polyol, ethylene glycol polyol and propylene glycol polyol.
5. The surface protective coating of any one of claims 2 to 4 wherein the amino compound is selected from one or more of diethyltoluenediamine, dimethylthiotoluenediamine, diaminodimethylthiomethylchlorobenzene, and bis-sec-aminodiphenylmethane.
6. The surface protective coating according to any one of claims 2 to 4, wherein the amine-terminated polyether is selected from the group consisting of polyoxypropylene triamines initiated with glycerol, polyoxypropylene triamines initiated with trimethylolpropane, polyoxyethylene-oxypropylene diamine, and amine-terminated polyethers of the three classes; preferably, the amine-terminated polyether is selected from Jeffamine T-3000, Jeffamine THF100, Versalink P-250, Versalink P-650, Versalink P-1000.
7. The surface protective coating of any one of claims 2 to 4, wherein the flame retardant is selected from one or more of trichloropropyl phosphate (TCPP), tris (2-chloroethyl) phosphate, tris (dichloropropyl) phosphate and tetrakis (2-chloroethyl) ethylene diphosphate;
optionally, the antioxidant is selected from one or more of antioxidant 1035, antioxidant 1010, antioxidant 168, antioxidant 245, antioxidant 264, antioxidant 3114, antioxidant 1024, antioxidant 1790, antioxidant 1315, diphenylisodecyl phosphite (DPDP) and triphenyl phosphite (TPP);
optionally, the ultraviolet light absorber is selected from one or more of UV571, UV328 and UV 531.
8. The surface protective coating of any one of claims 2 to 4, wherein the polyisocyanate is selected from one or more of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, tetramethylxylylene diisocyanate, trimethylhexamethylene diisocyanate, xylylene diisocyanate;
optionally, the polyisocyanate is selected from one or more of 5005, PM200, 44V20, PM400, Wannate8314, Wannate8316, Wannate 8324, MIPS, MDI50 and CDC.
9. A method of preparing the surface protective coating of any one of claims 2 to 8, comprising the steps of:
(1) uniformly mixing amino terminated polyether, polymer polyol, amino compound, flame retardant, antioxidant, ultraviolet absorber and colorant, and placing the mixture in a reaction vessel;
(2) placing the polyisocyanate in another reaction vessel;
(3) setting the temperature of the reaction container in the step (1) and the temperature of the reaction container in the step (2) to be 60-70 ℃, and then uniformly blending the raw materials in the two containers to obtain the surface protective coating.
10. A sleeper coated with the surface protective coating material as claimed in any one of claims 1 to 8, wherein the sleeper is a fiber-reinforced polyurethane foam composite sleeper;
optionally, the thickness of the surface protective coating on the surface of the sleeper is 0.01-2 mm;
optionally, the sleeper coated with the surface protective coating has a hardness of 30A-90D;
alternatively, the sleeper surface may be a smooth plane; the surface of the sleeper can also be a surface with bulges;
optionally, in the surface with the protrusions, the size of the protrusions is 0.1-2 mm; preferably, the bulges are spherical or hemispherical, and the distance between every two bulges is 0-2 mm.
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| CN1322786A (en) * | 2001-05-30 | 2001-11-21 | 海洋化工研究院 | Fireproof elastic painted polyurea material |
| CN1831068A (en) * | 2006-02-21 | 2006-09-13 | 上海瑞鹏化工材料科技有限公司 | Polyurea coating used for protection foamed articles and its prepn. method |
| CN102181221A (en) * | 2011-01-31 | 2011-09-14 | 北京东方雨虹防水技术股份有限公司 | Flame-retardant spraying polyurea elastic coating |
| CN102936329A (en) * | 2012-11-22 | 2013-02-20 | 山东东大一诺威新材料有限公司 | Polyurethane composite material for refrigeratory spray coating and preparation method thereof |
| CN103194143A (en) * | 2013-04-11 | 2013-07-10 | 南车眉山车辆有限公司 | Composition, preparation and spraying process of polyurea coating for railway vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322786A (en) * | 2001-05-30 | 2001-11-21 | 海洋化工研究院 | Fireproof elastic painted polyurea material |
| CN1831068A (en) * | 2006-02-21 | 2006-09-13 | 上海瑞鹏化工材料科技有限公司 | Polyurea coating used for protection foamed articles and its prepn. method |
| CN102181221A (en) * | 2011-01-31 | 2011-09-14 | 北京东方雨虹防水技术股份有限公司 | Flame-retardant spraying polyurea elastic coating |
| CN102936329A (en) * | 2012-11-22 | 2013-02-20 | 山东东大一诺威新材料有限公司 | Polyurethane composite material for refrigeratory spray coating and preparation method thereof |
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