CN109535971B - Wear-resistant self-lubricating coating and preparation method thereof - Google Patents
Wear-resistant self-lubricating coating and preparation method thereof Download PDFInfo
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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
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/65—Additives macromolecular
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- 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
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- 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
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- 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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a wear-resistant self-lubricating coating and a preparation method thereof, wherein the coating is composed of a component A and a component B according to the weight ratio of 6: 1, and the formula of the component A in percentage by weight is as follows: 40-55% of weather-resistant polyurethane resin A; 15-25% of weather-resistant polyurethane resin B; 5-15% of a wear-resistant powder material; 8-15% of self-lubricating powder material; 0.5-1% of wetting dispersant; 0.5-1% of a leveling agent; 5-15% of an organic solvent; the component B is aliphatic curing agent. The coating disclosed by the invention is a normal-temperature curing type wear-resistant self-lubricating coating, is simple to construct and convenient to maintain, can effectively prevent the friction and wear phenomenon among structural members, can meet the deformation requirement of a control surface structural member, and has a good protection effect.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a wear-resistant self-lubricating coating and a preparation method thereof.
Background
The metal structure material of the airplane control surface is usually aluminum alloy, the hardness and the wear resistance of the aluminum alloy can be improved through hard oxidation treatment on the surface, but the aluminum alloy has high friction coefficient and poor dual compatibility, and is more prone to frictional wear when being used under complex conditions such as ocean high-salt high-humidity climate and the like. In the flying process of an airplane, the load of a control surface metal structure is large, the friction form is relatively complex, the existing rotation friction and the reciprocating fretting friction caused by the vibration of an airfoil surface can aggravate the abrasion of the surface of the aluminum alloy, the material strength is reduced, even the material is broken, and the flying safety is seriously threatened.
At present, most domestic wear-resistant self-lubricating coatings have the problems of complex process (sintering method, chemical plating, electroplating and the like), high difficulty in external field maintenance (heating, drying and curing), poor aging resistance (epoxy, polyphenylene sulfide and the like are film forming substances) and the like, and the coating has high hardness and is difficult to meet the deformation requirement of a control surface structure in the flying process.
Therefore, a new elastic wear-resistant self-lubricating coating needs to be developed to meet the requirements of wear-resistant deformation and external field maintenance of a control surface metal structure and improve the flight stability and safety.
Disclosure of Invention
The invention aims to provide a wear-resistant self-lubricating coating which has certain elasticity and excellent wear-resistant and self-lubricating properties and can meet the wear-resistant and deformation requirements of conventional and special curved surface structural members and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a wear-resistant self-lubricating coating:
the composition comprises a component A and a component B according to the weight ratio of 6: 1, wherein the weight percentage formula of the component A is as follows: 40-55% of weather-resistant polyurethane resin A; 15-25% of weather-resistant polyurethane resin B; 5-15% of a wear-resistant powder material; 8-15% of self-lubricating powder material; 0.5-1% of wetting dispersant; 0.5-1% of a leveling agent; 5-15% of an organic solvent; the component B is aliphatic curing agent.
In the above technical solution of the present invention, the following technical features are also provided: the preferred formulation of the A component is as follows: 50% of weather-resistant polyurethane resin A; weather-resistant polyurethane resin B20%; 10% of wear-resistant powder material; 10% of self-lubricating powder material; 0.5% of wetting dispersant; 0.5 percent of leveling agent; 9% of an organic solvent;
in the above technical solution of the present invention, the following technical features are also provided: the weather-resistant polyurethane resin A in the component A is modified aliphatic polyurethane resin (WN-ZF-1 produced by ocean chemical research institute);
in the above technical solution of the present invention, the following technical features are also provided: the weather-resistant polyurethane resin B in the component A is fluorocarbon modified polyurethane resin (WN-ZF-2 produced by ocean chemical research institute);
in the above technical solution of the present invention, the following technical features are also provided: the wear-resistant powder material in the component A is one or more of aluminum oxide, silicon nitride and boron nitride;
in the above technical solution of the present invention, the following technical features are also provided: the self-lubricating powder material in the component A is one or more of graphite, molybdenum disulfide, tungsten disulfide and polytetrafluoroethylene micro powder;
in the above technical solution of the present invention, the following technical features are also provided: the wetting dispersant in the component A is a high molecular weight block copolymer solution with pigment affinity groups, and the wetting dispersant is one or more of BYK163, BYK161 and BYK 167;
the leveling agent in the component A is an organic silicon polyether copolymer, and the leveling agent is one or more of Dow Corning 14, Dow Corning 54 and Dow Corning 29;
in the above technical solution of the present invention, the following technical features are also provided: the organic solvent in the component A is an aromatic solvent, an ester solvent or an ether ester solvent, the aromatic solvent is xylene and aromatic hydrocarbon (S100, S150), the ester solvent is butyl acetate and ethyl acetate, and the ether ester solvent is ethylene glycol ethyl ether acetate and ethylene glycol butyl ether acetate.
In the above technical solution of the present invention, the following technical features are also provided: the component B is trimer of aliphatic isocyanate. Such as N3375 from Bayer corporation.
The preparation method of the wear-resistant self-lubricating coating (finish paint) comprises the following steps:
extracting raw materials according to the following formula:
40-55% of weather-resistant polyurethane resin A; 15-25% of weather-resistant polyurethane resin B; 5-15% of a wear-resistant powder material; 8-15% of self-lubricating powder material; 0.5-1% of wetting dispersant; 0.5-1% of a leveling agent; 5-15% of an organic solvent; the component B is an aliphatic curing agent, and the components A and B are prepared according to the weight ratio of 6: 1;
drying the wear-resistant and self-lubricating powder material for later use; and mixing the weather-resistant polyurethane resin A, the weather-resistant polyurethane resin B, the wear-resistant powder material, the wetting dispersant and the organic solvent, then adding the mixture into a basket type sand mill for grinding, and discharging the mixture with the grinding fineness of 5-30 mu m. And (3) after discharging, adding a self-lubricating powder material and a flatting agent, stirring and dispersing for 30 minutes at 2000 r/min, filtering by using a 120-mesh filter screen, testing the viscosity of the coating (coating in-4 cups), metering and packaging. After the substances of the component A are uniformly mixed, weighing the metered component A and the metered component B according to the ratio of 6: 1, uniformly mixing, and standing for 15 min.
Further, the coating is carried out by spraying or brushing.
Furthermore, the thickness of the coating of the dry film after one-time coating is controlled to be 70-80 μm.
Compared with the prior art, the invention has the advantages and positive effects that: the coating disclosed by the invention is a normal-temperature curing type wear-resistant self-lubricating coating, is simple to construct and convenient to maintain, can effectively prevent the friction and wear phenomenon among structural members, can meet the deformation requirement of a control surface structural member, and has a good protection effect. The coating disclosed by the invention takes two weather-resistant elastic polyurethane resins as film forming materials, is constructed by adopting an air spraying method, and is dried and cured at normal temperature, so that the problems that the existing coating technology cannot give consideration to wear-resistant self-lubricating characteristics, poor flexibility, high outfield maintenance difficulty and the like can be solved.
The coating is sprayed on an aluminum alloy substrate, and the performance characteristics of the coating are as follows:
1) the drying property GB/T1728 is drying at normal temperature, the surface drying is not more than 8h, and the actual drying is not more than 48 h.
2) Flexibility GB/T6742, 1 mm.
3) And the impact strength GB/T1732 is not less than 50 cm.
4) The adhesive force GB/T9286 is not lower than grade 1.
5) The abrasion resistance GB/T1768 is 1000g/1000 r, and is not higher than 10 mg.
6) And the friction coefficient GB/T10006 is not higher than 0.3.
7) The artificial accelerated aging is 1000h GB/T1865, and the coating does not crack or fall off.
Detailed Description
The present invention will be described in further detail with reference to specific examples:
example 1
A component A: 50% of weather-resistant polyurethane resin A; weather-resistant polyurethane resin B20%; 10% of aluminum oxide; 10% of molybdenum disulfide; BYK 1630.5%; dow Corning 140.5%; and 9% of butyl acetate.
Example 2
A component A: 40% of weather-resistant polyurethane resin A; weather-resistant polyurethane resin B25%; 13% of silicon nitride; 8% of tungsten disulfide; BYK 1610.6%; dow Corning 290.8%; 12.6 percent of butyl acetate.
Example 3
A component A: weather-resistant polyurethane resin A55%; weather-resistant polyurethane resin B15%; 4% of aluminum oxide; 4% of boron nitride; 3% of polytetrafluoroethylene micro powder; 8% of graphite; BYK 1670.5%; dow Corning 540.5%; 10 percent of butyl acetate.
Example 4 (comparative example)
A component A: weather-resistant polyurethane resin A70%; 4% of aluminum oxide; 4% of boron nitride; 3% of polytetrafluoroethylene micro powder; 8% of graphite; BYK 1670.5%; dow Corning 540.5%; 10 percent of butyl acetate.
Example 5 (comparative example)
A component A: weather-resistant polyurethane resin A55%; weather-resistant polyurethane resin B10 percent; 4% of aluminum oxide; 4% of boron nitride; 3% of polytetrafluoroethylene micro powder; 8% of graphite; BYK 1670.5%; dow Corning 540.5%; and 15% of butyl acetate.
Example 6 (comparative example)
A component A: weather-resistant polyurethane resin A55%; weather-resistant polyurethane resin B15%; 5% of alumina; 10% of boron nitride; 5% of polytetrafluoroethylene micro powder; BYK 1670.5%; dow Corning 540.5%; and 9% of butyl acetate.
The weather-resistant polyurethane resin A used in the examples 1 to 6 is WN-ZF-1 produced by the institute of ocean chemical industry, and weather-resistant aliphatic elastic polyurethane (the basic properties are shown in Table 1); the weather-resistant polyurethane resin B is WN-ZF-2 produced by ocean chemical research institute, and is weather-resistant fluorocarbon polyurethane (the basic performance is shown in Table 1). The component B is N3375 of Bayer company. The weight ratio of the component A to the component B is 6: 1.
TABLE 1 basic resin Properties
Examples 1-6 the A component was prepared according to the following procedure: and (3) drying the solid powder (wear-resistant and self-lubricating powder material) in the component A formula for later use. Weighing the weather-resistant polyurethane resin A, the weather-resistant polyurethane resin B, the wear-resistant powder material, the wetting dispersant and the organic solvent according to the formula of the component A in the embodiment, mixing, adding into a basket type sand mill, grinding, and discharging with the grinding fineness of 5-30 mu m. Adding the mixture into a stirring tank, starting stirring, adding the metered self-lubricating powder material and the leveling agent, stirring for 30min at 2000rmp of rotation speed by using a high-speed stirrer, filtering by using a 120-mesh filter screen, metering and packaging, and testing the viscosity of the coating for 110s (coating-4 cups). After the substances of the component A are uniformly mixed, the metered component A and the metered component B are taken according to the ratio of 6: 1, uniformly mixed and kept stand for 15min, and then finish paint is applied on the polished tinplate by adopting a spraying process.
Examples 1-6 abrasion resistant self-lubricating coatings were applied once and the properties after drying and curing are shown in table 2 below.
TABLE 2 wear-resistant self-lubricating coating Properties
All properties of the coatings show that the coatings obtained in examples 1-3 of the invention pass normal temperature drying property, flexibility, impact resistance, adhesive force, wear resistance, friction coefficient and artificial accelerated aging tests, and the dosage of the wear-resistant and self-lubricating powder materials in the resin compositions of examples 4-6 is not in the range defined by the invention, so that the wear resistance and the friction coefficient fluctuate and the application requirements are not met. The wear-resistant self-lubricating oil disclosed by the invention has excellent wear-resistant self-lubricating performance through test and examination of an airplane design unit at present, meets the deformation requirement of an airplane in a flying state, is simple in process and convenient and fast to maintain, and has a good application prospect.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (4)
1. The wear-resistant self-lubricating coating is characterized in that: the coating consists of a component A and a component B according to the weight ratio of 6: 1, wherein the formula of the component A in percentage by weight is as follows: 40-55% of weather-resistant polyurethane resin A; 15-25% of weather-resistant polyurethane resin B; 5-15% of a wear-resistant powder material; 8-15% of self-lubricating powder material; 0.5-1% of wetting dispersant; 0.5-1% of a leveling agent; 5-15% of an organic solvent; the component B is an aliphatic curing agent;
the weather-resistant polyurethane resin A is WN-ZF-1 produced by a marine chemical research institute;
the weather-resistant polyurethane resin B is WN-ZF-2 produced by a marine chemical research institute;
the wear-resistant powder material is one or more of aluminum oxide, silicon nitride and boron nitride; the self-lubricating powder material is one or more of graphite, molybdenum disulfide, tungsten disulfide and polytetrafluoroethylene micro powder; the wetting dispersant is a high molecular weight block copolymer solution with pigment affinity groups; the leveling agent is an organic silicon polyether copolymer; the organic solvent is an aromatic solvent, an ester solvent or an ether ester solvent; the aromatic solvent is xylene and aromatic hydrocarbon; the ester solvent is butyl acetate and ethyl acetate; the ether ester solvents are ethylene glycol ethyl ether acetate and ethylene glycol butyl ether acetate;
the component B is trimer of aliphatic isocyanate.
2. The wear-resistant self-lubricating coating according to claim 1, wherein the component A comprises the following components in percentage by weight: 50% of weather-resistant polyurethane resin A; weather-resistant polyurethane resin B20%; 10% of wear-resistant powder material; 10% of self-lubricating powder material; 0.5% of wetting dispersant; 0.5 percent of leveling agent; 9% of organic solvent.
3. A method for preparing the wear-resistant self-lubricating coating according to claim 1, characterized in that: the preparation method comprises the following steps:
the formulation of claim 1 wherein the raw materials are: the component A comprises the following components in percentage by weight: 40-55% of weather-resistant polyurethane resin A; 15-25% of weather-resistant polyurethane resin B; 5-15% of a wear-resistant powder material; 8-15% of self-lubricating powder material; 0.5-1% of wetting dispersant; 0.5-1% of a leveling agent; 5-15% of an organic solvent; the component B is an aliphatic curing agent, and the components A and B are prepared according to the weight ratio of 6: 1;
drying the wear-resistant powder material and the self-lubricating powder material for later use; mixing the weather-resistant polyurethane resin A, the weather-resistant polyurethane resin B, the wear-resistant powder material, the wetting dispersant and the organic solvent, adding the mixture into a basket type sand mill, grinding, and discharging the mixture with the grinding fineness of 5-30 mu m; after discharging, adding the self-lubricating powder material and the flatting agent, stirring and dispersing for 30 minutes at 2000 revolutions per minute, filtering by using a 120-mesh filter screen, measuring and packaging after testing the viscosity of the coating; after the substances of the component A are uniformly mixed, weighing the metered component A and the metered component B according to the ratio of 6: 1, uniformly mixing, and standing for 15 min;
the weather-resistant polyurethane resin A is WN-ZF-1 produced by a marine chemical research institute; the weather-resistant polyurethane resin B is WN-ZF-2 produced by a marine chemical research institute; the wear-resistant powder material is one or more of aluminum oxide, silicon nitride and boron nitride; the self-lubricating powder material is one or more of graphite, molybdenum disulfide, tungsten disulfide and polytetrafluoroethylene micro powder; the wetting dispersant is a high molecular weight block copolymer solution with pigment affinity groups; the leveling agent is an organic silicon polyether copolymer; the organic solvent is an aromatic solvent, an ester solvent or an ether ester solvent; the aromatic solvent is xylene and aromatic hydrocarbon; the ester solvent is butyl acetate and ethyl acetate; the ether ester solvents are ethylene glycol ethyl ether acetate and ethylene glycol butyl ether acetate; the component B is trimer of aliphatic isocyanate.
4. The preparation method of the wear-resistant self-lubricating coating according to claim 3, wherein the formula of the component A in percentage by weight is as follows: 50% of weather-resistant polyurethane resin A; weather-resistant polyurethane resin B20%; 10% of wear-resistant powder material; 10% of self-lubricating powder material; 0.5% of wetting dispersant; 0.5 percent of leveling agent; 9% of organic solvent.
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| CN110527395A (en) * | 2019-09-17 | 2019-12-03 | 西安康普威能源技术有限公司 | A kind of wear-resistant paint and the preparation method and application thereof |
| CN111215309A (en) * | 2019-10-30 | 2020-06-02 | 宁波劳伦斯汽车内饰件有限公司 | Processing method of single-side roll-coated metal plate |
| CN110982412A (en) * | 2019-11-27 | 2020-04-10 | 云南昆船机械制造有限公司 | High-hardness coating material for aluminum alloy protection, preparation method and application |
| CN114989710A (en) * | 2022-06-25 | 2022-09-02 | 共享智能装备有限公司 | Coating capable of prolonging service life of equipment, preparation method and use method |
| CN116694216A (en) * | 2023-06-29 | 2023-09-05 | 海洋化工研究院有限公司 | Room-temperature-cured two-component high-strength high-elasticity high-wear-resistance polyurethane resin and preparation method thereof |
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|---|---|---|---|---|
| CN1086530A (en) * | 1992-09-23 | 1994-05-11 | 中国科学院兰州化学物理研究所 | Wear-resistant corrosion-proof coating solidified at normal temperature |
| CN104559728A (en) * | 2014-12-12 | 2015-04-29 | 中国航空工业集团公司北京航空材料研究院 | Corrosion-resistant anti-cavitation coating and preparation method thereof |
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| US6844392B2 (en) * | 2000-08-29 | 2005-01-18 | Andrew W. Suman | Abradable dry powder coatings, methods for making and coating, and coated articles therefrom |
| JP4852415B2 (en) * | 2004-06-04 | 2012-01-11 | 日本パーカライジング株式会社 | Water-based paint for sliding member and sliding member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086530A (en) * | 1992-09-23 | 1994-05-11 | 中国科学院兰州化学物理研究所 | Wear-resistant corrosion-proof coating solidified at normal temperature |
| CN104559728A (en) * | 2014-12-12 | 2015-04-29 | 中国航空工业集团公司北京航空材料研究院 | Corrosion-resistant anti-cavitation coating and preparation method thereof |
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