CN110423532A - A kind of preparation method of high-adhesion hydraulic composite coating - Google Patents
A kind of preparation method of high-adhesion hydraulic composite coating Download PDFInfo
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Abstract
The present invention relates to a kind of preparation methods of high-adhesion hydraulic composite coating, belong to technical field of coatings.The present invention is modified as modifier modification silicon carbide by vinyltriethoxysilane, prepare high-adhesion hydraulic composite coating filler, silicon carbide has hardness high, wearability is good, many advantages, such as thermal expansion coefficient is small, and contains more hydroxyl group on silicon-carbide particles surface and be easy to carry out surface modification, epoxy group can be introduced on silicon-carbide particle by vinyltriethoxysilane modification, the compatibility and bond strength of silicon carbide and epoxy resin can be effectively improved, improve the dispersibility of silicon carbide in the epoxy, improve interface binding power, modified silicon carbide and epoxy resin can be passed through into chemistry key connection, when being destroyed by erosive wear, the two is firmly combined, modified silicon carbide peels off difficult, stress dispersion and transmitting are easy, therefore it can effectively improve the erosion-wear-resisting performance of coating.
Description
Technical field
The present invention relates to a kind of preparation methods of high-adhesion hydraulic composite coating, belong to technical field of coatings.
Background technique
The wear-out failure that hydraulic is subject to during military service is mainly erosive wear.Erosive wear refers to target table
Face is through the fluid with certain angle and speed or after being entrained with the fluid scouring of tempering property solid particle, caused target material surface
The phenomenon that being destroyed.Erosive wear increases sharply the consumption that will lead to the energy and material in commercial process, and reduces equipment
Production efficiency.In addition, erosive wear can also accelerate the failure of part, so that the time of overhaul time shortens and parts thereof
It replaces excessively frequent.So, it has been caused directly or indirectly the waste of a large amount of human and material resources resources, national economy has been good for
Kang Fazhan generation cannot be neglected influence.Erosive wear is many kinds of, it is wide to be related to field, but hydroelectric generation, mining, chemical industry,
The fields such as oil exploitation are especially prominent, as blade will receive the impact of the water flow containing sand, mining machine to the hydraulic turbine during the work time
Flow passage components are by the slurry punching mill etc. containing slag.In addition, since China's trunk river sand content is larger, to hydraulic
Erosive wear caused by flow passage components destroys more violent.
However, hydraulic flow passage components during military service, will not merely be flowed by the cutting and abrasion of solid particle
The erosion of body also suffers the corrosion failure of various liquid mediums.
The phenomenon that causing material surface to be destroyed by chemistry or electrochemical action between material and ambient enviroment, is known as losing.
The whole world is every year because of economic loss, about economic loss summation caused by the natural calamities such as typhoon, earthquake, arid caused by corroding
Six times, about 1 trillion dollars.This numerical value accounts for about the 3% of gross national product.In addition, there are about 20% in the whole world according to statistics
The metal materials such as steel, can not be recycled because being corroded.China in 2011 because corrosion caused by economic loss just up to 14000
Hundred million yuan.However, above-mentioned because again in economic loss, hydraulic is occupied because of corrosion failure bring economic loss caused by corroding
Greatly.It is more worth we note that be that can not only directly contribute economic loss after hydraulic is corroded, can also give
Industrial production brings potential security risk.
Mostly metal material is used to make based on hydraulic flow passage components, and metal material has intensity height, specific modulus
Greatly, conductive, thermally conductive, the advantages that wearability is good.Therefore, how research improves the erosive resistance of metal material, always for
Improve one of the hot spot of the erosion-wear-resisting performance through fluid erosion component.But single metal material is in use,
Long-lived requirement is usually unable to satisfy because of self-defect.Such as: although titanium alloy strength and stiffness are high, high-temperature mechanics
Good, excellent anti-corrosion performance of energy etc., but its hardness is low, anti-solid particle impact ability is poor, cannot be used alone as Anti-erosion abrasion
Component materials.Surface treatment or alloying can be generally carried out to metal material, improve its surface hardness and wearability, it is expected to can
Improve metal material erosion-wear-resisting performance.Recent years, common process for treating surface had plasma spray technology, self propagating high temperature
Synthetic technology, physical gas phase deposition technology, laser melting and coating technique etc..
The developing history of corrosion-inhibiting coating is long, from the zinc white enamel paint and flax for being used primarily for train, machinery and large ship
Oily red lead paint, phenolic aldehyde tung oil quick-drying paint finally, and then the rapid development of epoxy resin and polyurethane industrial is anti-corrosion again
It is added to new selection.Subsequent acrylic acid coatings, zinc-rich coating, anodic deposition paint occur in succession.The more anti-corrosion of current application
Coating mainly has polyurethane coating, epoxy coating, phenolic coating etc., and wherein antiseptic property is the most outstanding surely belongs to ring
Oxygen resinous coat and polyurethane coating.
The performance of coating antiseptic effect mainly passes through following effect:
(1) Isolated Shield acts on: coating Tu is applied in metal surface, and corrosive medium will destroy metal surface and have to pass through coating.
The passivation corrosion inhibition of filler: the filler added in coating can change metallic surface performance, bring it about passivation
To alleviate corrosion failure.
Electro-chemical protection is provided: metal packing more lower than parent metal current potential being added in the coating.When corrosion is situated between
Matter is penetrated into, and when coming base metal surface, matrix and metal packing form primary battery, the metal packing of anode be corroded first into
And protect parent metal.
The electricresistance effect of coating: coating is usually insulating materials, can keep stablizing in corrosive medium for a long time, anti-corrosive properties
Coating that can be better can more prevent metallic matrix to be corroded.
Erosive wear and corrosion failure are widely present in the industries such as chemical industry, mining, pipeline transportation, hydroelectric generation, cause
A large amount of mechanical part is destroyed and fails, and national economy is caused to be suffered heavy losses.Therefore, to the anti-corruption of hydraulic flow passage components
Erosion and Erosive Properties requirement are higher and higher, so research and development has higher erosion-wear-resisting performance and corrosion resistance
Coating, to protection easily worn part, reduce energy consumption, save material, reduce industrial production in safety accident generation, improve industry
Production efficiency is of great significance.The coating (metal based coating, polymer-based coating) developed in the past, some have obtained obvious effect
Fruit, but will there are still the following deficiencies as permanently effective guard technology:
(1) metal based coating brittleness is big, difficult to complex-shaped Workpiece painting.
(2) the polymer-based coating of past exploitation there are bonding force is insufficient and polymer toughening phase and curing agent it is anti-
Answer rate with the reaction rate of matrix and curing agent it is inconsistent caused by dimensional contraction, internal stress is larger the problems such as.
(3) to multiple
The research of compatibility and bond strength between condensation material reinforced phase and matrix is less, and the boundary between reinforced phase and matrix
Face performance has directly influenced the anticorrosive and erosion-wear-resisting performance of material.The anticorrosive behavioral study of 4 pairs of coatings is insufficient.
Anticorrosion is increasingly prominent with the deterioration of environment, in addition China is in the important stage of industry restructuring,
The energy-efficient necessary element as in industrial production.Therefore, it develops high-performance corrosion-inhibiting coating and analyzes coating corrosion and destroy row
It is significant to acceleration process of industrialization.
Summary of the invention
The technical problems to be solved by the invention: for the past exploitation polymer-based coating there are bonding force deficiency, with
And polymer toughening phase and the reaction rate of curing agent with the reaction rate of matrix and curing agent it is inconsistent caused by dimensional contraction,
The larger problem of internal stress provides a kind of preparation method of high-adhesion hydraulic composite coating.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) epoxy resin is placed in vacuum drying oven, 1 ~ 2h, the epoxy resin after must preheating is preheated under conditions of 50 ~ 60 DEG C；
(2) compound modification of epoxy resin is added in epoxy resin, is stirred under conditions of 50 ~ 60 DEG C with 200 ~ 300r/min revolving speed
1 ~ 2h is mixed, blending epoxy is obtained；
(3) silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether will be modified to be added in blending epoxy, room temperature
Under 20 ~ 30min stirred quickly with 600 ~ 800r/min revolving speed, then be placed in 20 ~ 30min of ultrasonic disperse in ultrasonic dispersing machine, it is close
Envelope saves, and obtains high-adhesion hydraulic composite coating.
The epoxy resin, compound modification of epoxy resin, modified silicon carbide, nano zine oxide, stearic acid, nonyl phenol are poly-
The parts by weight of ethylene oxide ether be 80 ~ 100 parts of epoxy resin, 40 ~ 50 parts of compound modification of epoxy resin, 24 ~ 30 parts of modified silicon carbide,
16 ~ 20 parts of nano zine oxides, 4 ~ 5 parts of stearic acid, 1 ~ 3 part of Nonyl pheno.
The power of ultrasonic disperse described in step (3) is 300 ~ 400W.
The specific preparation step of compound modification of epoxy resin described in step (2) are as follows:
(1) polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle, are passed through nitrogen protection, under conditions of 60 ~ 70 DEG C with
180 ~ 200r/min revolving speed is stirred to react 70 ~ 90min, is cooled to 50 ~ 60 DEG C, obtains base polyurethane prepolymer for use as；
(2) castor oil, bisphenol A type epoxy resin are added in base polyurethane prepolymer for use as, under conditions of 50 ~ 60 DEG C with 200 ~
240r/min revolving speed stirs 30 ~ 40min, obtains reactant；
(3) reactant is placed under conditions of 300Pa ~ 400Pa and depressurizes 10 ~ 20min of degassing process, be sealed, obtain compound change
Property epoxy resin.
The polypropylene glycol, castor oil, toluene di-isocyanate(TDI), bisphenol A type epoxy resin parts by weight be 40 ~ 60 parts
Polypropylene glycol, 10 ~ 15 parts of castor oil, 20 ~ 30 parts of toluene di-isocyanate(TDI)s, 80 ~ 120 parts of bisphenol A type epoxy resins.
The rate that is passed through of nitrogen described in step (1) is 40 ~ 50mL/min.
The specific preparation step of modification silicon carbide described in step (3) are as follows:
(1) by silicon carbide adding into acetone, it is placed in 30 ~ 40min of ultrasonic vibration in supersonic wave cleaning machine, filters, solid is taken, with nothing
Water-ethanol washs 3 ~ 5 times, the silicon carbide after must cleaning；
(2) silicon carbide after cleaning is placed in a vacuum drying oven, is dried in vacuo under conditions of 100 ~ 120Pa, 120 ~ 130 DEG C
20 ~ for 24 hours, obtain pretreatment silicon carbide；
(3) will pretreatment silicon carbide, vinyltriethoxysilane be added dimethylbenzene in, under 80 ~ 90 DEG C of water bath condition with
280 ~ 300r/min revolving speed is stirred to react 6 ~ 8h, and room temperature cooling obtains reaction solution；
(4) it places reaction liquid into vacuumfilter and is filtered by vacuum, take filter cake, washed 3 ~ 5 times with dehydrated alcohol, it is dry to be placed in vacuum
In dry case, dry 8 ~ 10h, obtains modified silicon carbide under conditions of 60 ~ 80Pa, 100 ~ 120 DEG C.
The silicon carbide, acetone, dimethylbenzene, vinyltriethoxysilane parts by weight be 30 ~ 40 parts of silicon carbide,
120 ~ 160 parts of acetone, 90 ~ 120 parts of dimethylbenzene, 6 ~ 8 parts of vinyltriethoxysilane.
The power of ultrasonic vibration described in step (1) is 400 ~ 500W.
The pressure of vacuum filtration described in step (3) is -0.06 ~ -0.04MPa.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention using epoxy resin as substrate, it is composite modified to epoxy resin with polyether polyurethane and castor oil again, preparation
The adhesion strength of a kind of high-adhesion hydraulic composite coating, epoxy resin is good, due in epoxy resin have hydroxyl, amino,
Epoxy group isopolarity group, therefore there is good adhesion strength to the metal on hydraulic surface, after epoxy resin cure,
Since the cohesive force of glue-line is very big, epoxy resin can be tightly adhered on substrate, can effectively improve the caking property of coating, epoxy
Resin can make epoxy adhesive in room temperature or low-temperature setting, will not give birth in solidification by selecting certain curing agent
The by-product of Cheng Shui or other condensation, thus coating process is simple can not have to application pressure or only when bonding
It is applicable in contact pressure, easy to operate, epoxy resin shrinking percentage is low, contraction and deformation will not be generated under long-term stress, and
And epoxy resin has good water resistance, can be used for a long time in water；Polyether polyurethane is by polyether polyol, isocyanic acid
Ester, chain extender etc. constitute a kind of high performance block polymer material, do not have ester bond on the main chain of polyether polyol, obtained poly-
Urethane elastomer has good hydrolytic resistance and excellent dynamic property, is changed by polyether polyurethane to epoxy resin
Property, the toughness of system can be made to improve, caking ability enhancing, castor oil is the glyceryl ester of fatty acid, in castor oil molecule structure
Containing a large amount of double bond, there is good water-fast and water-proof function, and have hydroxyl in castor oil molecule, energy and isocyanates
Reaction forms three-dimensional-structure, the caking property of coating can be improved, and epoxy resin, polyurethane and the intermolecular of castor oil can
To form the network-like structure being cross-linked with each other, it can be effectively adhered to substrate surface, improve the caking property of coating；
(2) present invention is modified as modifier modification silicon carbide by vinyltriethoxysilane, prepares high-adhesion water engineer
Tool composite coating filler, it is many that silicon carbide has that hardness is high, wearability is good, creep-resistant property is excellent, thermal expansion coefficient is small etc.
Advantage, and contain more hydroxyl group on silicon-carbide particles surface and be easy to carry out surface modification, pass through three ethoxy of vinyl
Epoxy group can be introduced on silicon-carbide particle by base silane modification, can effectively improve the compatibility of silicon carbide and epoxy resin
And bond strength, improve the dispersibility of silicon carbide in the epoxy, interface binding power is improved, simultaneously because the connection of curing agent
Effect, can be by modified silicon carbide and epoxy resin by chemistry key connection, and when being destroyed by erosive wear, the two combines jail
Gu modified silicon carbide peels off difficulty, stress dispersion and transmitting are easy, therefore can effectively improve the erosion-wear-resisting of coating
Energy.
Specific embodiment
According to parts by weight, 40 ~ 60 parts of polypropylene glycols, 10 ~ 15 parts of castor oil, 20 ~ 30 parts of toluene diisocyanates are weighed respectively
Acid esters, 80 ~ 120 parts of bisphenol A type epoxy resins, polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle, with 40 ~ 50mL/
The air velocity of min is passed through nitrogen protection, 70 are stirred to react under conditions of 60 ~ 70 DEG C with 180 ~ 200r/min revolving speed ~
90min is cooled to 50 ~ 60 DEG C, obtains base polyurethane prepolymer for use as, and base polyurethane prepolymer for use as is added in castor oil, bisphenol A type epoxy resin
In, 30 ~ 40min is stirred with 200 ~ 240r/min revolving speed under conditions of 50 ~ 60 DEG C, reactant is obtained, reactant is placed in 300Pa
10 ~ 20min of degassing process is depressurized under conditions of ~ 400Pa, is sealed, is obtained compound modification of epoxy resin；Again in parts by weight
Meter weighs 30 ~ 40 parts of silicon carbide, 120 ~ 160 parts of acetone, 90 ~ 120 parts of dimethylbenzene, 6 ~ 8 parts of vinyl triethoxyl silicon respectively
Silicon carbide adding into acetone is placed in supersonic wave cleaning machine by alkane, 30 ~ 40min of ultrasonic vibration under conditions of 400 ~ 500W,
Filtering, takes solid, is washed 3 ~ 5 times with dehydrated alcohol, the silicon carbide after cleaning is placed in vacuum drying by the silicon carbide after must cleaning
In case, under conditions of 100 ~ 120Pa, 120 ~ 130 DEG C be dried in vacuo 20 ~ for 24 hours, obtain pretreatment silicon carbide, will pretreatment carbonization
Silicon, vinyltriethoxysilane are added in dimethylbenzene, with the stirring of 280 ~ 300r/min revolving speed under 80 ~ 90 DEG C of water bath condition
6 ~ 8h is reacted, room temperature cooling obtains reaction solution, places reaction liquid into vacuumfilter, under conditions of -0.06 ~ -0.04MPa
Vacuum filtration, takes filter cake, is washed 3 ~ 5 times, be placed in a vacuum drying oven with dehydrated alcohol, in 60 ~ 80Pa, 100 ~ 120 DEG C of item
Dry 8 ~ 10h, obtains modified silicon carbide under part；Again according to parts by weight, weigh respectively 80 ~ 100 parts of epoxy resin, 40 ~ 50 parts it is multiple
It is poly- to close modified epoxy, 24 ~ 30 parts of modified silicon carbide, 16 ~ 20 parts of nano zine oxides, 4 ~ 5 parts of stearic acid, 1 ~ 3 part of nonyl phenol
Ethylene oxide ether, epoxy resin is placed in vacuum drying oven, and 1 ~ 2h, the asphalt mixtures modified by epoxy resin after must preheating are preheated under conditions of 50 ~ 60 DEG C
Rouge, by compound modification of epoxy resin be added epoxy resin in, under conditions of 50 ~ 60 DEG C with 200 ~ 300r/min revolving speed stirring 1 ~
2h obtains blending epoxy, modified silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether is added hybrid epoxidized
In resin, 20 ~ 30min is stirred quickly with 600 ~ 800r/min revolving speed under room temperature, then be placed in ultrasonic dispersing machine, 300 ~
20 ~ 30min of ultrasonic disperse under conditions of 400W, is sealed, and obtains high-adhesion hydraulic composite coating.
Embodiment 1
According to parts by weight, 40 parts of polypropylene glycols, 10 parts of castor oil, 20 parts of toluene di-isocyanate(TDI)s, 80 parts of bisphenol-As are weighed respectively
Polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle by type epoxy resin, are passed through nitrogen with the air velocity of 40mL/min
Protection, is stirred to react 70min under conditions of 60 DEG C with 180r/min revolving speed, is cooled to 50 DEG C, obtains base polyurethane prepolymer for use as, by castor
Sesame oil, bisphenol A type epoxy resin are added in base polyurethane prepolymer for use as, stir 30min under conditions of 50 DEG C with 200r/min revolving speed,
Reactant is obtained, reactant is placed under conditions of 300PaPa and depressurizes degassing process 10min, is sealed, obtains composite modified epoxy
Resin；Again according to parts by weight, 30 parts of silicon carbide, 120 parts of acetone, 90 parts of dimethylbenzene, 6 parts of vinyl triethoxyls are weighed respectively
Silicon carbide adding into acetone is placed in supersonic wave cleaning machine by silane, ultrasonic vibration 30min under conditions of 400W, filtering,
Solid is taken, is washed 3 times with dehydrated alcohol, the silicon carbide after cleaning is placed in a vacuum drying oven, In by the silicon carbide after must cleaning
100Pa, 20h is dried in vacuo under conditions of 120 DEG C, obtains pretreatment silicon carbide, will pre-process silicon carbide, vinyl triethoxyl silicon
Alkane is added in dimethylbenzene, is stirred to react 6h under 80 DEG C of water bath condition with 280r/min revolving speed, and room temperature cooling obtains reaction solution,
It places reaction liquid into vacuumfilter, is filtered by vacuum under conditions of -0.06MPa, take filter cake, washed 3 times with dehydrated alcohol,
It is placed in a vacuum drying oven, dry 8h, obtains modified silicon carbide under conditions of 60Pa, 100 DEG C；Again according to parts by weight, respectively
Weigh 80 parts of epoxy resin, 40 parts of compound modification of epoxy resin, 24 parts of modified silicon carbide, 16 parts of nano zine oxides, 4 parts of tristearin
Acid, 1 part of nonylphenol polyoxyethylene ether, epoxy resin is placed in vacuum drying oven, 1h is preheated under conditions of 50 DEG C, after obtaining preheating
Epoxy resin, by compound modification of epoxy resin be added epoxy resin in, under conditions of 50 DEG C with 200r/min revolving speed stirring
1h obtains blending epoxy, modified silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether is added hybrid epoxidized
In resin, 20min is stirred quickly with 600r/min revolving speed under room temperature, then be placed in ultrasonic dispersing machine, under conditions of 300W
Ultrasonic disperse 20min, is sealed, and obtains high-adhesion hydraulic composite coating.
Embodiment 2
According to parts by weight, 50 parts of polypropylene glycols, 13 parts of castor oil, 25 parts of toluene di-isocyanate(TDI)s, 100 parts of bis-phenols are weighed respectively
A type epoxy resin, polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle, are passed through nitrogen with the air velocity of 45mL/min
Gas shielded is stirred to react 80min under conditions of 65 DEG C with 190r/min revolving speed, is cooled to 55 DEG C, obtains base polyurethane prepolymer for use as, will
Castor oil, bisphenol A type epoxy resin are added in base polyurethane prepolymer for use as, with the stirring of 220r/min revolving speed under conditions of 55 DEG C
35min obtains reactant, and reactant is placed under conditions of 350Pa and depressurizes degassing process 15min, is sealed, obtains composite modified
Epoxy resin；Again according to parts by weight, 35 parts of silicon carbide, 140 parts of acetone, 105 parts of dimethylbenzene, 7 parts of vinyl three are weighed respectively
Silicon carbide adding into acetone is placed in supersonic wave cleaning machine by Ethoxysilane, ultrasonic vibration 35min under conditions of 450W,
Filtering, takes solid, is washed 4 times with dehydrated alcohol, the silicon carbide after cleaning is placed in vacuum oven by the silicon carbide after must cleaning
In, it is dried in vacuo 22h under conditions of 110Pa, 125 DEG C, obtains pretreatment silicon carbide, silicon carbide, three second of vinyl will be pre-processed
Oxysilane is added in dimethylbenzene, is stirred to react 7h under 85 DEG C of water bath condition with 290r/min revolving speed, room temperature cooling obtains instead
Liquid is answered, is placed reaction liquid into vacuumfilter, is filtered by vacuum under conditions of -0.05MPa, filter cake is taken, is washed with dehydrated alcohol
It washs 4 times, is placed in a vacuum drying oven, dry 9h, obtains modified silicon carbide under conditions of 70Pa, 110 DEG C；Again in parts by weight
Meter, respectively weigh 90 parts of epoxy resin, 45 parts of compound modification of epoxy resin, 27 parts of modified silicon carbide, 18 parts of nano zine oxides,
4.5 parts of stearic acid, 2 parts of nonylphenol polyoxyethylene ether, epoxy resin is placed in vacuum drying oven, and is preheated under conditions of 55 DEG C
1.5h, the epoxy resin after must preheating, by compound modification of epoxy resin be added epoxy resin in, under conditions of 55 DEG C with
250r/min revolving speed stirs 1.5h, obtains blending epoxy, by modified silicon carbide, nano zine oxide, stearic acid, polyoxyethylene nonyl phenyl
Vinethene is added in blending epoxy, quickly stirs 25min under room temperature with 700r/min revolving speed, then be placed in ultrasonic dispersing machine
In, ultrasonic disperse 25min, is sealed under conditions of 350W, obtains high-adhesion hydraulic composite coating.
Embodiment 3
According to parts by weight, 60 parts of polypropylene glycols, 15 parts of castor oil, 30 parts of toluene di-isocyanate(TDI)s, 120 parts of bis-phenols are weighed respectively
A type epoxy resin, polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle, are passed through nitrogen with the air velocity of 50mL/min
Gas shielded is stirred to react 90min under conditions of 70 DEG C with 200r/min revolving speed, is cooled to 60 DEG C, obtains base polyurethane prepolymer for use as, will
Castor oil, bisphenol A type epoxy resin are added in base polyurethane prepolymer for use as, with the stirring of 240r/min revolving speed under conditions of 60 DEG C
40min obtains reactant, and reactant is placed under conditions of 400Pa and depressurizes degassing process 20min, is sealed, obtains composite modified
Epoxy resin；Again according to parts by weight, 40 parts of silicon carbide, 160 parts of acetone, 120 parts of dimethylbenzene, 8 parts of vinyl three are weighed respectively
Silicon carbide adding into acetone is placed in supersonic wave cleaning machine by Ethoxysilane, ultrasonic vibration 40min under conditions of 500W,
Filtering, takes solid, is washed 5 times with dehydrated alcohol, the silicon carbide after cleaning is placed in vacuum oven by the silicon carbide after must cleaning
In, it is dried in vacuo for 24 hours under conditions of 120Pa, 130 DEG C, obtains pretreatment silicon carbide, silicon carbide, three second of vinyl will be pre-processed
Oxysilane is added in dimethylbenzene, is stirred to react 8h under 90 DEG C of water bath condition with 300r/min revolving speed, room temperature cooling obtains instead
Liquid is answered, is placed reaction liquid into vacuumfilter, is filtered by vacuum under conditions of -0.04MPa, filter cake is taken, is washed with dehydrated alcohol
It washs 5 times, is placed in a vacuum drying oven, dry 10h, obtains modified silicon carbide under conditions of 80Pa, 120 DEG C；Again in parts by weight
Meter weighs 100 parts of epoxy resin, 50 parts of compound modification of epoxy resin, 30 parts of modified silicon carbide, 20 parts of nano zine oxides, 5 respectively
Part stearic acid, 3 parts of nonylphenol polyoxyethylene ether, epoxy resin is placed in vacuum drying oven, 2h is preheated under conditions of 60 DEG C, obtains
Compound modification of epoxy resin is added in epoxy resin epoxy resin after preheating, is turned under conditions of 60 DEG C with 300r/min
Speed stirring 2h, obtains blending epoxy, modified silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether is added mixed
It closes in epoxy resin, 30min is stirred quickly with 800r/min revolving speed under room temperature, then be placed in ultrasonic dispersing machine, 400W's
Under the conditions of ultrasonic disperse 30min, be sealed, obtain high-adhesion hydraulic composite coating.
High-adhesion hydraulic composite coating prepared by the present invention and the existing hydraulic coating used are examined
It surveys, specific testing result is as follows:
Performance test:
By coating obtained by 1-3 of the embodiment of the present invention and comparative example, using spraying method on the stainless steel plate of 120mm × 150mm
Make coating, first toast 10min at 50 DEG C, then in 160 DEG C of baking 30min, then to the adhesive force of coating obtained by each group, firmly
Degree, wear-resisting property, antiseptic property are tested:
Wherein, sample obtained by each group is is separately immersed in 25 DEG C, 5% sulfuric acid solution and 5% hydroxide by antiseptic property test
In sodium solution, 48h detects the variation of its coating；It is two-way under 20 N active forces up to 630 type ink friction-resistant testers using style
Rubbed sample 500 times, test wear rate.
1 high-adhesion hydraulic composite coating performance characterization of table
High-adhesion hydraulic composite coating prepared by the present invention as shown in Table 1, adhesive force is strong, good corrosion resistance, erosion resistance
Polishing machine is strong, and excellent combination property has broad application prospects.
Claims (10)
1. a kind of preparation method of high-adhesion hydraulic composite coating, which is characterized in that specific preparation step are as follows:
(1) epoxy resin is placed in vacuum drying oven, 1 ~ 2h, the epoxy resin after must preheating is preheated under conditions of 50 ~ 60 DEG C；
(2) compound modification of epoxy resin is added in epoxy resin, is stirred under conditions of 50 ~ 60 DEG C with 200 ~ 300r/min revolving speed
1 ~ 2h is mixed, blending epoxy is obtained；
(3) silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether will be modified to be added in blending epoxy, room temperature
Under 20 ~ 30min stirred quickly with 600 ~ 800r/min revolving speed, then be placed in 20 ~ 30min of ultrasonic disperse in ultrasonic dispersing machine, it is close
Envelope saves, and obtains high-adhesion hydraulic composite coating.
2. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 1, which is characterized in that institute
The epoxy resin stated, compound modification of epoxy resin, modified silicon carbide, nano zine oxide, stearic acid, nonylphenol polyoxyethylene ether
Parts by weight be 80 ~ 100 parts of epoxy resin, 40 ~ 50 parts of compound modification of epoxy resin, 24 ~ 30 parts of modified silicon carbide, 16 ~ 20 parts receive
Rice zinc oxide, 4 ~ 5 parts of stearic acid, 1 ~ 3 part of Nonyl pheno.
3. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 1, which is characterized in that step
Suddenly the power of ultrasonic disperse described in (3) is 300 ~ 400W.
4. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 1, which is characterized in that step
Suddenly the specific preparation step of compound modification of epoxy resin described in (2) are as follows:
(1) polypropylene glycol, toluene di-isocyanate(TDI) are placed in reaction kettle, are passed through nitrogen protection, under conditions of 60 ~ 70 DEG C with
180 ~ 200r/min revolving speed is stirred to react 70 ~ 90min, is cooled to 50 ~ 60 DEG C, obtains base polyurethane prepolymer for use as；
(2) castor oil, bisphenol A type epoxy resin are added in base polyurethane prepolymer for use as, under conditions of 50 ~ 60 DEG C with 200 ~
240r/min revolving speed stirs 30 ~ 40min, obtains reactant；
(3) reactant is placed under conditions of 300Pa ~ 400Pa and depressurizes 10 ~ 20min of degassing process, be sealed, obtain compound change
Property epoxy resin.
5. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 4, which is characterized in that institute
The polypropylene glycol stated, castor oil, toluene di-isocyanate(TDI), bisphenol A type epoxy resin parts by weight be 40 ~ 60 parts of polypropylene glycols,
10 ~ 15 parts of castor oil, 20 ~ 30 parts of toluene di-isocyanate(TDI)s, 80 ~ 120 parts of bisphenol A type epoxy resins.
6. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 4, which is characterized in that step
Suddenly the rate that is passed through of nitrogen described in (1) is 40 ~ 50mL/min.
7. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 1, which is characterized in that step
Suddenly the specific preparation step of modification silicon carbide described in (3) are as follows:
(1) by silicon carbide adding into acetone, it is placed in 30 ~ 40min of ultrasonic vibration in supersonic wave cleaning machine, filters, solid is taken, with nothing
Water-ethanol washs 3 ~ 5 times, the silicon carbide after must cleaning；
(2) silicon carbide after cleaning is placed in a vacuum drying oven, is dried in vacuo under conditions of 100 ~ 120Pa, 120 ~ 130 DEG C
20 ~ for 24 hours, obtain pretreatment silicon carbide；
(3) will pretreatment silicon carbide, vinyltriethoxysilane be added dimethylbenzene in, under 80 ~ 90 DEG C of water bath condition with
280 ~ 300r/min revolving speed is stirred to react 6 ~ 8h, and room temperature cooling obtains reaction solution；
(4) it places reaction liquid into vacuumfilter and is filtered by vacuum, take filter cake, washed 3 ~ 5 times with dehydrated alcohol, it is dry to be placed in vacuum
In dry case, dry 8 ~ 10h, obtains modified silicon carbide under conditions of 60 ~ 80Pa, 100 ~ 120 DEG C.
8. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 7, which is characterized in that institute
The silicon carbide stated, acetone, dimethylbenzene, vinyltriethoxysilane parts by weight be 30 ~ 40 parts of silicon carbide, 120 ~ 160 part third
Ketone, 90 ~ 120 parts of dimethylbenzene, 6 ~ 8 parts of vinyltriethoxysilane.
9. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 7, which is characterized in that step
Suddenly the power of ultrasonic vibration described in (1) is 400 ~ 500W.
10. a kind of preparation method of high-adhesion hydraulic composite coating according to claim 7, which is characterized in that
The pressure of vacuum filtration described in step (3) is -0.06 ~ -0.04MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115746664A (en) * | 2022-11-23 | 2023-03-07 | 新乡学院 | Preparation method of silane modified nanoparticle epoxy resin coating on aluminum alloy surface |
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Application publication date: 20191108 |