Anti-eccentric-wear cladding coating material as well as preparation method and application thereof

Abstract

The invention discloses an anti-eccentric-wear cladding coating material as well as a preparation method and application thereof. The anti-eccentric-wear cladding coating material is prepared from the following raw materials in parts by weight: 15 to 22 parts of modified novolac epoxy resin, 8 to 15 parts of polyether-ether-ketone, 10 to 18 parts of nano tungsten carbide, 0.5 to 2 parts of graphene oxide, 5 to 8 parts of polyamide-imide, 1 to 3 parts of silane coupling agent, 2 to 5 parts of nano titanium dioxide, 3 to 6 parts of diaminodiphenyl sulfone, 5 to 10 parts of spherical aluminum powder, 1 to 3 parts of molybdenum disulfide, 0.5 to 1 part of defoaming agent and 0.3 to 0.8 part of flatting agent. Through selection of the raw materials, the anti-eccentric-wear cladding coating material has the performance of high hardness, high toughness and excellent interface bonding force, and can meet the requirement that the friction life is larger than or equal to 5 million times under the complex well condition.

Description

Technical Field

[0001] This invention relates to the field of coating materials technology, specifically to an anti-abrasion cladding coating material, its preparation method, and its application. Background Technology

[0002] As oil extraction evolves towards more complex well conditions (cluster wells, deviated wells, and horizontal wells), tubing wear failure has become a key issue restricting production efficiency. Existing anti-wear technologies (such as centralizers and plastic liners) suffer from drawbacks such as complex operation, short wear life (<1 million friction cycles), and high fluid resistance.

[0003] Cladding coating technology has become a research hotspot due to its high bonding strength and wear resistance, but existing coating materials have problems such as insufficient hardness (<4H), poor toughness (impact strength <800J / m), and weak resistance to media corrosion.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-wear cladding coating material, its preparation method, and its application. The anti-wear cladding coating material of this invention, through the selection of various raw materials, possesses high hardness, high toughness, and excellent interfacial bonding properties, and can meet the requirement of ≥5 million friction cycles under complex well conditions.

[0006] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted:

[0007] The first aspect of this invention provides an anti-abrasion cladding coating material, the anti-abrasion cladding coating material comprising the following raw materials in parts by weight:

[0008] The mixture comprises 15-22 parts modified phenolic epoxy resin, 8-15 parts polyether ether ketone, 10-18 parts nano tungsten carbide, 0.5-2 parts graphene oxide, 5-8 parts polyamide imide, 1-3 parts silane coupling agent, 2-5 parts nano titanium dioxide, 3-6 parts diaminodiphenyl sulfone, 5-10 parts spherical aluminum powder, 1-3 parts molybdenum disulfide, 0.5-1 part defoamer, and 0.3-0.8 parts leveling agent.

[0009] Preferably, the anti-abrasion cladding coating material comprises the following raw materials in parts by weight:

[0010] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 15 parts nano tungsten carbide, 1 part graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 8 parts spherical aluminum powder, 2 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0011] Preferably, the silane coupling agent is KH-560.

[0012] Preferably, the modified phenolic epoxy resin has an epoxy equivalent of 180–210 g / mol and a softening point of 65–95 °C.

[0013] Preferably, the spherical aluminum powder has a particle size of not less than 100 mesh.

[0014] Preferably, the defoamer is a polyether-modified silicone defoamer.

[0015] A second aspect of the present invention provides a method for preparing the above-mentioned anti-wear cladding coating material, the method comprising the following steps:

[0016] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed to obtain a core-shell structured filler.

[0017] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide are added to a twin-screw extruder. After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide are added for blending, extrusion molding and pelletizing to obtain granules.

[0018] (c) Spray a leveling agent onto the surface of the particles and dry to obtain the anti-abrasion cladding coating material.

[0019] Preferably, the twin-screw extruder operates at a temperature of 280–300°C and a rotation speed of 250–350 rpm; the blending time is 8–12 min.

[0020] A third aspect of the present invention provides the application of the above-mentioned anti-abrasion cladding coating material in the cladding of the inner wall of an oil pipe.

[0021] Preferably, the cladding thickness of the inner wall of the oil pipe is 300–600 μm.

[0022] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0023] In this invention, nano-WC (hard phase) and GO (tough phase) form a "rigid-flexible composite" filler, increasing hardness by 30% (≥6H) and fracture toughness by 45% (KIC≥5.5MPa·m1 / 2). In addition, the silane coupling agent KH-560 forms chemical covalent bonds at the filler-resin interface, with a bonding force ≥20MPa (ASTM D3359). Furthermore, the synergistic effect of MoS2 (layered structure) and spherical aluminum powder (friction-reducing skeleton) results in a friction coefficient ≤0.12 (dry friction). Under the combined action of all raw materials, the prepared anti-friction cladding coating material possesses high hardness, high toughness, and excellent interfacial bonding strength, and can meet the requirement of ≥5 million friction cycles under complex well conditions. Detailed Implementation

[0024] The embodiments of the technical solution of the present invention will be described in detail below with reference to the examples. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and are therefore only examples, and should not be used to limit the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0026] The raw materials used in the following embodiments are as follows:

[0027] Modified phenolic epoxy resin: epoxy equivalent 190-205 g / mol, softening point 68℃, purchased from Tiantai High-tech (Guangzhou) Co., Ltd.

[0028] Polyetheretherketone (PEEK): Purchased from Anhui Guoyuan Technology Development Co., Ltd.

[0029] Nano-tungsten carbide: Purchased from Hubei Great Biomedical Technology Co., Ltd.;

[0030] Graphene oxide: 500 mesh, purchased from Henan Wanying Refractory Materials Technology Co., Ltd.

[0031] Polyamide-imide: SABIC Plastics Trading (Suzhou) Co., Ltd.;

[0032] Silane coupling agent: KH-560;

[0033] Diaminodiphenyl sulfone: Shandong Chuangying Chemical Co., Ltd.;

[0034] Spherical aluminum powder: 500 mesh sieve residue ≤5%, purchased from Henan Xinsheng Aluminum Powder Co., Ltd.

[0035] Molybdenum disulfide: 1750 mesh particle size, Shandong Luxing Chemical Co., Ltd.;

[0036] Defoamer: Polyether modified silicone, product number px-123, purchased from Shandong Punio Water Treatment Technology Co., Ltd.;

[0037] Leveling agent: BASF leveling agent EFKA FL 3777AN.

[0038] Example 1

[0039] This embodiment is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0040] The mixture contains 22 parts modified phenolic epoxy resin, 15 parts polyether ether ketone, 10 parts nano tungsten carbide, 2 parts graphene oxide, 5 parts polyamide imide, 3 parts silane coupling agent, 5 parts nano titanium dioxide, 6 parts diaminodiphenyl sulfone, 10 parts spherical aluminum powder, 1 part molybdenum disulfide, 1 part defoamer, and 0.3 parts leveling agent.

[0041] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0042] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0043] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 300℃, speed 350rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide were added and blended for 8min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0044] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0045] Example 2

[0046] This embodiment is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0047] The mixture contains 15 parts modified phenolic epoxy resin, 8 parts polyether ether ketone, 18 parts nano tungsten carbide, 0.5 parts graphene oxide, 8 parts polyamide imide, 1 part silane coupling agent, 2 parts nano titanium dioxide, 3 parts diaminodiphenyl sulfone, 5 parts spherical aluminum powder, 3 parts molybdenum disulfide, 0.5 parts defoamer, and 0.8 parts leveling agent.

[0048] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0049] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0050] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 280℃, speed 250rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide were added and blended for 12min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0051] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0052] Example 3

[0053] This embodiment is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0054] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 15 parts nano tungsten carbide, 1 part graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 8 parts spherical aluminum powder, 2 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0055] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0056] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0057] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 290℃, speed 300rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide were added and blended for 10min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0058] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0059] Comparative Example 1

[0060] This comparative example is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0061] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 16 parts nano tungsten carbide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 8 parts spherical aluminum powder, 2 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0062] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0063] (a) Nano-tungsten carbide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0064] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 290℃, speed 300rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide were added and blended for 10min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0065] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0066] Comparative Example 2

[0067] This comparative example is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0068] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 16 parts graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 8 parts spherical aluminum powder, 2 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0069] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0070] (a) Graphene oxide, nano-titanium dioxide and silane coupling agent were mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0071] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 290℃, speed 300rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide were added and blended for 10min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0072] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0073] Comparative Example 3

[0074] This comparative example is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0075] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 15 parts nano tungsten carbide, 1 part graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 10 parts spherical aluminum powder, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0076] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0077] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0078] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 290℃, speed 300rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer and spherical aluminum powder were added and blended for 10min. The mixture was then extruded, granulated (particle size 0.5-1mm) to obtain granules.

[0079] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0080] Comparative Example 4

[0081] This comparative example is an anti-abrasion cladding coating material, which comprises the following raw materials in parts by weight:

[0082] The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 15 parts nano tungsten carbide, 1 part graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 10 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

[0083] The preparation method of the above-mentioned anti-wear cladding coating material includes the following steps:

[0084] (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed for 30 min (power 500W) to obtain core-shell structured filler;

[0085] (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide were added to a twin-screw extruder (temperature 290℃, speed 300rpm). After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer and molybdenum disulfide were added and blended for 10min. The mixture was then extruded and pelletized (particle size 0.5-1mm) to obtain granules.

[0086] (c) Spray a leveling agent onto the surface of the particles and dry in a fluidized bed (80°C, 2h) to obtain the anti-abrasion cladding coating material.

[0087] Experimental Example

[0088] The anti-wear cladding coating materials prepared in Example 3 and Comparative Examples 1-4 were obtained respectively;

[0089] The coating hardness (ASTM D3363), bonding strength (ASTM D3359 (cross-cut test)), wear life (linear reciprocating friction tester), impact strength (ASTM D256), temperature resistance (TGA (10℃ / min)), and friction coefficient (original well fluid medium (60℃)) of the anti-abrasion cladding coating material prepared above were tested, and the test results are shown in Table 1.

[0090] Table 1

[0091]

[0092] As can be seen from the table:

[0093] Compared to the comparative examples, the coating materials prepared in the embodiments of this application have better performance.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An anti-abrasion cladding coating material, characterized in that, The anti-wear cladding coating material comprises the following raw materials in parts by weight: The mixture comprises 15-22 parts modified phenolic epoxy resin, 8-15 parts polyether ether ketone, 10-18 parts nano tungsten carbide, 0.5-2 parts graphene oxide, 5-8 parts polyamide imide, 1-3 parts silane coupling agent, 2-5 parts nano titanium dioxide, 3-6 parts diaminodiphenyl sulfone, 5-10 parts spherical aluminum powder, 1-3 parts molybdenum disulfide, 0.5-1 part defoamer, and 0.3-0.8 parts leveling agent.

2. The anti-abrasion cladding coating material according to claim 1, characterized in that, The anti-wear cladding coating material comprises the following raw materials in parts by weight: The mixture contains 18 parts modified phenolic epoxy resin, 12 parts polyether ether ketone, 15 parts nano tungsten carbide, 1 part graphene oxide, 6 parts polyamide imide, 2 parts silane coupling agent, 3 parts nano titanium dioxide, 4 parts diaminodiphenyl sulfone, 8 parts spherical aluminum powder, 2 parts molybdenum disulfide, 0.8 parts defoamer, and 0.5 parts leveling agent.

3. The anti-abrasion cladding coating material according to claim 1 or 2, characterized in that, The silane coupling agent is KH-560.

4. The anti-abrasion cladding coating material according to claim 1 or 2, characterized in that, The modified phenolic epoxy resin has an epoxy equivalent of 180–210 g / mol and a softening point of 65–95 °C.

5. The anti-abrasion cladding coating material according to claim 1 or 2, characterized in that, The spherical aluminum powder has a particle size of not less than 100 mesh.

6. The anti-wear cladding coating material according to claims 1-2, characterized in that, The defoamer is a polyether-modified silicone defoamer.

7. The method for preparing the anti-wear cladding coating material according to any one of claims 1 to 6, characterized in that, The preparation method includes the following steps: (a) Nano-tungsten carbide, graphene oxide, nano-titanium dioxide and silane coupling agent are mixed and ultrasonically dispersed to obtain a core-shell structured filler. (b) Modified phenolic epoxy resin, polyether ether ketone and polyamide imide are added to a twin-screw extruder. After melting, core-shell structure filler, diaminodiphenyl sulfone, defoamer, spherical aluminum powder and molybdenum disulfide are added for blending, extrusion molding and pelletizing to obtain granules. (c) Spray a leveling agent onto the surface of the particles and dry to obtain the anti-abrasion cladding coating material.

8. The application of the anti-abrasion cladding coating material according to any one of claims 1 to 6 in the cladding of the inner wall of oil pipes.

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