CN113512347A - High-end wear-resistant Krah pipe and preparation method thereof - Google Patents
High-end wear-resistant Krah pipe and preparation method thereof Download PDFInfo
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- CN113512347A CN113512347A CN202110441075.3A CN202110441075A CN113512347A CN 113512347 A CN113512347 A CN 113512347A CN 202110441075 A CN202110441075 A CN 202110441075A CN 113512347 A CN113512347 A CN 113512347A
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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
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- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- 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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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Abstract
The invention discloses a high-end wear-resistant Krah pipe and a preparation method thereof, belonging to the field of Krah pipes and comprising a pipe body, wherein the outer wall of the pipe body is coated with a wear-resistant layer, and the wear-resistant layer comprises the following raw materials: matrix material, adhesion promoter and self-repairing microcapsule; the self-repairing microcapsule comprises a first microcapsule and a second microcapsule, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. The wear-resistant layer is arranged on the wall of the pipe body, so that the wear resistance of the pipe body can be improved, the service life of the pipe body can be prolonged, meanwhile, the adhesion promoter is added into the wear-resistant layer, the adhesion between the wear-resistant layer and the wall of the pipe body can be improved, in addition, the self-repairing type microcapsule is added into the wear-resistant layer, and under the condition that wear or cracks occur in the using process, the film-forming high polymer prepolymer in the first microcapsule reacts with the curing agent in the second microcapsule, so that the crack and the wear are filled and repaired, and the service life of the pipe body is prolonged.
Description
Technical Field
The invention relates to a carat pipe, in particular to a high-end wear-resistant carat pipe and a preparation method thereof.
Background
The Krah pipe is a high-density polyethylene winding structure wall pipe formed by winding in a hot state, the wall pipe is a special structure wall pipe with high external pressure resistance, which is prepared by taking high-density polyethylene resin as a main raw material, adopting a hot winding poplar type process and taking a polypropylene single-wall corrugated pipe as a supporting structure, and Krah pipe products can be divided into four series of PR, OP, SQ and VW; PR and OP are mainly used as buried drainage pipelines, SQ is mainly used for manufacturing containers or inspection wells, VW is mainly used for tee joints, elbows and pipe fittings formed by secondary processing, and PR series are the most applied in products; the existing Clar pipe has poor protection performance such as wear resistance, and the surface of the pipe is often damaged and damaged in the loading, unloading and construction processes due to the movement of the pipe and the contact with the ground in the pipeline construction process.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art and provides a high-end wear-resistant Krah pipe and a preparation method thereof.
The technical solution of the invention is as follows:
the utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains following raw materials: matrix material, adhesion promoter and self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule, wherein the first microcapsule contains a main film-forming high-molecular prepolymer containing wear-resistant particles, and the second microcapsule contains a curing agent containing the wear-resistant particles.
Preferably, the mass ratio of the matrix material to the adhesion promoter to the self-repairing microcapsule is 80-90:0.1-10: 1-20.
Preferably, the adhesion promoter comprises at least one of a silane, a titanate, a zirconate, a carboxy phosphate.
Preferably, the wear-resistant particles comprise one or more of silicone master batch, silicon carbide, silicon dioxide, aluminum trioxide and diamond.
Preferably, the wear resistant particles have a particle size of 0.2-5 μm.
Preferably, the matrix material is polyurethane or polytetrafluoroethylene.
The invention also discloses a preparation method of the high-end wear-resistant Krah pipe, which comprises the steps of preparing a pipe body, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, soaking the pipe body in the wear-resistant layer coating, taking out and drying.
Preferably, the soaking is performed at least twice, the first soaking temperature is 50-90 ℃, and the second soaking temperature is 100-120 ℃.
Preferably, before the body soaks, carry out the preliminary treatment to the body, specifically be: the wall of the pipe body is wound with fibers impregnated with resin.
Preferably, the resin impregnated fiber is epoxy resin, and the content of the resin impregnated fiber is 10-20% of the mass of the fiber.
The invention has at least one of the following beneficial effects:
(1) according to the high-end wear-resistant Krah pipe, the wear-resistant layer is arranged on the wall of the pipe body, so that the wear-resistant performance of the pipe body can be improved, the service life of the pipe body can be prolonged, meanwhile, the adhesion promoter is added into the wear-resistant layer, so that the adhesion between the wear-resistant layer and the wall of the pipe body can be improved, the self-repairing type microcapsule is added into the wear-resistant layer, so that the film-forming polymer prepolymer in the first microcapsule and the curing agent in the second microcapsule react under the condition that wear or cracks occur in the use process, the crack and the wear are filled and repaired, the service life of the pipe body is prolonged, and the wear-resistant particles are added into the first microcapsule and the second microcapsule, so that the wear-resistant performance after repair can be improved.
(2) According to the preparation method of the high-end wear-resistant Krah pipe, at least two times of soaking at different temperatures are performed on the pipe body, and the first soaking can also play a role in preheating the pipe body and coating besides feeding, so that the wear-resistant layer is more uniformly distributed on the pipe body, and the wear-resistant effect is more excellent.
(3) According to the preparation method of the high-end wear-resistant Krah pipe, fibers soaked with resin are wound on the pipe body before the pipe body is soaked, so that the contact area and the adhesive force between a wear-resistant layer and the pipe body can be improved, and the strength of the pipe body can be improved.
Detailed Description
The following specific examples further illustrate the technical solutions of the present invention.
The lower pipe body is a HDPE material pipe.
Example 1
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 80 parts of base material, 0.5 part of adhesion promoter and 10 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 4:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is hydroxyl-terminated polysiloxane, and the core material of the second microcapsule is methyl tributyl ketoxime silane and stannous octoate.
The preparation method of the first microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, adding 5 parts of wear-resistant particles with the mass ratio of 1:1 and a core material of input hydroxyl polysiloxane, increasing the stirring speed to 1200rpm, stirring for 25 minutes to fully emulsify the wear-resistant particles, then reducing the speed to 500rpm, adding 15 parts of formaldehyde, adjusting the temperature to 55 ℃ to perform polycondensation reaction for 7 hours, then filtering, washing 3 times by using xylene and deionized water, and performing vacuum drying; a first microcapsule is produced.
The preparation method of the second microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, and adding 5 parts of a mixture of 1: 1: 2, increasing the stirring speed to 1100rpm, stirring for 25 minutes to fully emulsify the core materials, then reducing the speed to 700rpm, adding 15 parts of formaldehyde, adjusting the temperature to 55 ℃ to perform polycondensation reaction for 8 hours, then filtering, washing for 4 times by using dimethylbenzene and deionized water, and performing vacuum drying; a second microcapsule is produced.
The adhesion promoter includes an epoxysilane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 0.7 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 50 ℃, and the second soaking temperature is 100 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is made of epoxy resin, the content of the resin impregnated on the fiber is 10% of the mass of the fiber, and the fiber is glass fiber.
Example 2
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material, 0.9 part of adhesion promoter and 12 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 3:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is vinyl polydimethylsiloxane, and the core material of the second microcapsule is hydrogen-containing silicone oil and a platinum catalyst.
The preparation method of the first microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, adding 5 parts of wear-resistant particles and a core material of vinyl polydimethylsiloxane in a mass ratio of 1:1, increasing the stirring speed to 1200rpm, stirring for 25 minutes to fully emulsify the mixture, then reducing the speed to 500rpm, adding 15 parts of formaldehyde, adjusting the temperature to 55 ℃ to perform polycondensation reaction for 7 hours, then filtering, washing for 3 times by using xylene and deionized water, and performing vacuum drying; a first microcapsule is produced.
The preparation method of the second microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, and adding 4 parts of the following components in a mass ratio of 1: 0.05 of wear-resistant particles, core materials of hydrogen-containing silicone oil and a platinum catalyst, the stirring speed is increased to 1100rpm, the mixture is stirred for 25 minutes to be fully emulsified, then the speed is reduced to 700rpm, 15 parts of formaldehyde are added, the temperature is adjusted to 55 ℃, the polycondensation reaction is carried out for 8 hours, then the mixture is filtered, washed for 4 times by dimethylbenzene and deionized water, and dried in vacuum; a second microcapsule is produced.
The adhesion promoter includes a silane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 60 ℃, and the second soaking temperature is 110 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is made of epoxy resin, the content of the resin impregnated on the fiber is 12% of the mass of the fiber, and the fiber is glass fiber.
Example 3
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 90 parts of base material, 1.2 parts of adhesion promoter and 13 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 1:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is hydroxyl-terminated polysiloxane, and the core material of the second microcapsule is methyl tributyl ketoxime silane, tetrabutyl ketoxime silane and dibutyltin dilaurate.
The preparation method of the first microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, adding 4 parts of wear-resistant particles and core materials of hydroxyl-terminated polysiloxane in a mass ratio of 1:1, increasing the stirring speed to 1200rpm, stirring for 25 minutes to fully emulsify the mixture, then reducing the speed to 500rpm, adding 15 parts of formaldehyde, adjusting the temperature to 55 ℃ to perform polycondensation reaction for 7 hours, filtering, washing 3 times by using xylene and deionized water, and performing vacuum drying; a first microcapsule is produced.
The preparation method of the second microcapsule comprises the following steps: fully stirring and dissolving 7 parts of urea, 1 part of resorcinol, 1 part of ammonium chloride, 300 parts of water and 1.5 parts of emulsifier, adjusting the pH value to 4.0 by using dilute hydrochloric acid, and adding 3 parts of the following components in a mass ratio of 1: 0.5:0.5:0.5, increasing the stirring speed to 1100rpm, stirring for 25 minutes to fully emulsify the wear-resistant particles and the core materials of methyl tributyl ketoximino silane, tetrabutyl ketoximino silane and dibutyltin dilaurate, then reducing the stirring speed to 700rpm, adding 15 parts of formaldehyde, adjusting the temperature to 55 ℃ to perform polycondensation reaction for 8 hours, then filtering, washing for 4 times by using dimethylbenzene and deionized water, and performing vacuum drying; a second microcapsule is produced.
The adhesion promoter includes an epoxysilane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 5 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 90 ℃, and the second soaking temperature is 120 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is made of epoxy resin, the content of the resin impregnated on the fiber is 20% of the mass of the fiber, and the fiber is glass fiber.
Example 4
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material, 0.9 part of adhesion promoter and 12 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 3:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is vinyl polydimethylsiloxane, and the core material of the second microcapsule is hydrogen-containing silicone oil and a platinum catalyst.
The first and second microcapsules were prepared in the same manner as in example 2.
The adhesion promoter comprises barium zirconate.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking comprises three times, wherein the first soaking temperature is 60 ℃, the second soaking temperature is 80 ℃, and the third soaking temperature is 120 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is made of epoxy resin, the content of the resin impregnated on the fiber is 12% of the mass of the fiber, and the fiber is made of glass fiber.
Example 5
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material, 0.9 part of adhesion promoter and 12 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 3:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is vinyl polydimethylsiloxane, and the core material of the second microcapsule is hydrogen-containing silicone oil and a platinum catalyst.
The first and second microcapsules were prepared in the same manner as in example 2.
The adhesion promoter includes a silane.
The wear resistant particles comprise silicon carbide. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 60 ℃, and the second soaking temperature is 110 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is made of epoxy resin, the content of the resin impregnated on the fiber is 12% of the mass of the fiber, and the fiber is made of glass fiber.
Comparative example 1 (non self-repairing type microcapsule)
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material and 0.9 part of adhesion promoter;
the adhesion promoter includes a silane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material and the adhesion promoter to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 60 ℃, and the second soaking temperature is 110 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is characterized in that the impregnated resin is epoxy resin, and the content of the impregnated resin on the fiber is 12% of the mass of the fiber.
Comparative example 2 (one-time soaking)
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material, 0.9 part of adhesion promoter and 12 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 3:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is vinyl polydimethylsiloxane, and the core material of the second microcapsule is hydrogen-containing silicone oil and a platinum catalyst.
The first and second microcapsules were prepared in the same manner as in example 2.
The adhesion promoter includes a silane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking temperature is 110 ℃. The body carries out the preliminary treatment to the body before soaking, specifically is: winding resin-impregnated fibers around the wall of the pipe body; the resin-impregnated fiber is characterized in that the impregnated resin is epoxy resin, and the content of the impregnated resin on the fiber is 12% of the mass of the fiber.
COMPARATIVE EXAMPLE 3 (without pretreatment)
The utility model provides a high-end wear-resisting carat pipe, includes the body, and the coating of body outer wall has the wearing layer, the wearing layer contains the raw materials of following parts by weight: 85 parts of base material, 0.9 part of adhesion promoter and 12 parts of self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule in a mass ratio of 3:1, wherein the first microcapsule contains a main film-forming high-molecular prepolymer of wear-resistant particles, and the second microcapsule contains a curing agent of the wear-resistant particles. Specifically, the wall materials of the first microcapsule and the second microcapsule are polyurea resin, the core material of the first microcapsule is vinyl polydimethylsiloxane, and the core material of the second microcapsule is hydrogen-containing silicone oil and a platinum catalyst.
The first and second microcapsules were prepared in the same manner as in example 2.
The adhesion promoter includes a silane.
The wear resistant particles comprise a silicone masterbatch. The particle size of the wear-resistant particles is 1.2 μm.
The base material is polyurethane.
The preparation method comprises the steps of preparing the pipe body by a hot melting method, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the pipe body in the wear-resistant layer coating, taking out and drying. The soaking process comprises two times, wherein the first soaking temperature is 60 ℃, and the second soaking temperature is 110 ℃.
The above examples and comparative examples were subjected to the performance test, and the test values are shown in Table 1.
Adhesion force: and (3) scribing lines perpendicular to each other on the surface of the sample at intervals of 1mm, scribing the lines into grid squares, ensuring one scribing line during scribing, observing whether the covering layer in the area is peeled off from the substrate or not, and calculating the peeling rate.
Flexural modulus: reference is made to GB/T9341-2000.
Wear rate: and (3) suspending and fixing the sample on a self-made pot type slurry erosion abrasion testing machine, carrying out slurry type erosion abrasion test on the sample, wherein the erosion angle is 30 degrees, the erosion time is 2 hours, and calculating the abrasion rate.
| Test specimen | Adhesion (%) | Wear rate (%) | Flexural modulus (Mpa) |
| Example 1 | 5 | 3 | 358 |
| Example 2 | 6 | 4 | 359 |
| Example 3 | 5 | 5 | 361 |
| Example 4 | 4 | 4 | 365 |
| Example 5 | 6 | 5 | 365 |
| Comparative example 1 | 8 | 11 | 342 |
| Comparative example 2 | 12 | 13 | 312 |
| Comparative example 3 | 11 | 12 | 287 |
From the above table, it can be seen that the performance of the example is better than that of the comparative example, the reason may be as follows, and as can be seen from the analysis of the comparative example 1, when the pipe body is subjected to the erosion force, the wall of the pipe body is cracked, the wall of the first microcapsule and the wall of the second microcapsule are also cracked, the internal raw materials are subjected to a curing reaction, the erosion part is re-bonded, and the wear-resistant particles are simultaneously added into the core material, so that the wear rate is reduced, and the erosion resistance is greatly improved; according to the analysis of the comparative example 2, in the embodiment, the multiple soaking at different temperatures is adopted, and the first soaking can preheat the pipe body and the coating besides feeding, so that the wear-resistant layer is more uniformly distributed on the pipe body, and the performance is more excellent; as can be seen from the analysis of comparative example 3, in the embodiment in which the pipe body is pretreated before the pipe body is soaked, the fibers soaked with the resin can improve the contact area and the adhesion between the abrasion resistant layer and the pipe body on the one hand, and the fibers themselves can improve the bending strength of the pipe body on the other hand.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the endpoints. For example: "A-B" means a range of greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a wear-resisting carat pipe of high-end which characterized in that:
including the body, the outer wall coating of body has the wearing layer, the wearing layer contains following raw materials: matrix material, adhesion promoter and self-repairing microcapsule;
the self-repairing microcapsule comprises a first microcapsule and a second microcapsule, wherein the first microcapsule contains a main film-forming high-molecular prepolymer containing wear-resistant particles, and the second microcapsule contains a curing agent containing the wear-resistant particles.
2. A high end, wear resistant carat pipe as claimed in claim 1, wherein: the mass ratio of the matrix material, the adhesion promoter and the self-repairing microcapsule is 80-90:0.1-10: 1-20.
3. A high end, wear resistant carat pipe as claimed in claim 1, wherein: the adhesion promoter comprises at least one of silane, titanate, zirconate and carboxyl phosphate.
4. A high end, wear resistant carat pipe as claimed in claim 1, wherein: the wear-resistant particles comprise one or more of silicone master batch, silicon carbide, silicon dioxide, aluminum trioxide and diamond.
5. A high end, wear resistant carat pipe as claimed in claim 1, wherein: the particle size of the wear-resistant particles is 0.2-5 μm.
6. A high end, wear resistant carat pipe as claimed in claim 1, wherein: the base material is polyurethane or polytetrafluoroethylene.
7. A preparation method of a high-end wear-resistant Krah pipe is characterized by comprising the following steps: preparing a tube body, uniformly mixing the base material, the adhesion promoter and the self-repairing microcapsule to prepare the wear-resistant layer coating, then soaking the tube body in the wear-resistant layer coating, taking out and drying.
8. The method as claimed in claim 7, wherein the method comprises the steps of: the soaking is at least twice, the first soaking temperature is 50-90 ℃, and the second soaking temperature is 100-120 ℃.
9. The method as claimed in claim 7, wherein the method comprises the steps of: the body carries out the preliminary treatment to the body before soaking, specifically is: the wall of the pipe body is wound with fibers impregnated with resin.
10. The method of claim 9, wherein the high-end abrasion-resistant carat pipe comprises: the resin-impregnated fiber is characterized in that the impregnated resin is epoxy resin, and the content of the impregnated resin on the fiber is 10-20% of the mass of the fiber.
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