CN105440899A - Heat dissipation type powdery coating for pump valve - Google Patents

Abstract

The invention discloses a heat dissipation type powdery coating for a pump valve. The heat dissipation type powdery coating is prepared from raw materials in parts by weight as follows: 52-54 parts of hydroxyl polyester resin, 7-8 parts of fluorocarbon resin, 4-5 parts of triglycidyl isocyanurate, 13-15 parts of nano aluminum oxide, 0.8-0.9 parts of perfluorooctyltriethoxysilane, 25-30 parts of an ethanol solution with the concentration being 75wt%, 0.5-0.6 parts of a silane coupling agent kh560, 1.5-2 parts of heat conduction silicone grease, 3-4 parts of silicon dioxide, 0.6-0.7 parts of ethylene bis stearamide, 10-12 parts of silicon carbide, 13-14 parts of cordierite powder, 1.5-2 parts of PVP (polyvinyl pyrrolidone), 9-11 parts of a urea solution with the concentration being 20wt% and an appropriate amount of water. The prepared powdery coating is electrostatically sprayed on the surface of a pump valve material, can relieve high temperature caused during work, has a good heat dissipation effect, further has both hardness and flexibility and is long in service life.

Description

A kind of pump valve heat radiating type powder coating

Technical field

The present invention relates to technical field of coatings, particularly relate to a kind of pump valve heat radiating type powder coating.

Background technology

In recent years, the application of powder coating has surmounted water-borne coatings and high solid coating etc. in coatings industry, becomes industry member and uses one of more coating variety.Powder coating process solves the problems such as inflammable, the explosive and contaminate environment existing for traditional paint coating process, and its coating possesses superior performance, the recyclable use again of raw material, and coating process is simple.Pump can be widely used in, valve housing is coated with and loads onto.Because pump valve is foundry goods or forging, therefore its surface irregularity, also certain defect is there is in currently available technology for the functional powder coating technology of valve surface process, cause coating to occur the defects such as shrinkage cavity, pinprick and serious orange peel shape, and then cause pump valve to be restricted in special dimension application such as food, biology, pharmacy, chemical industry, space flight and electronics.And most of pump valve all can be used in the factor such as the media environment impact of High water cut, Gao Hansha, deep-etching, increase the weight of the corrosion of pump valve, easier fouling on pump valve, thus cause pump valve short for work-ing life, the problem that round of visits is short, workload is large, make troubles to use, general surface intensified technique mainly contains metal plating, ceramic coating, some other coating, although slow down wearing and tearing to a certain extent, improve erosion resistance, but all there is weak point: the easy layering of metal plating causes coming off; Pottery shock resistance is poor, easy chipping phenomenon; Some polymeric coating mechanics and thermal characteristics difference etc.Thus research and development have the powder coating of the functions such as weather-proof, water-tight corrosion-proof, and possess skills the meaning promoting to improve with industry.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of pump valve heat radiating type powder coating.

The present invention is achieved by the following technical solutions:

A kind of pump valve heat radiating type powder coating, is made up of the raw material of following weight part: the urea soln 9-11 that hydroxy polyester resin 52-54, fluorocarbon resin 7-8, isocyanuric acid three-glycidyl ester 4-5, nano-aluminium oxide 13-15, perfluoro capryl triethoxyl silane 0.8-0.9, concentration are ethanolic soln 25-30, the silane coupling agent kh5600.5-0.6 of 75wt%, heat-conducting silicone grease 1.5-2, silicon-dioxide 3-4, ethylene bis stearamide 0.6-0.7, silicon carbide 10-12, trichroite powder 13-14, PVP1.5-2, concentration are 20wt%, water are appropriate.

Described a kind of pump valve heat radiating type powder coating, is prepared from by following concrete steps:

(1) nano-aluminium oxide is put into the ethanolic soln that concentration is 75wt%, dispersed with stirring is even, then perfluoro capryl triethoxyl silane is added, reflux 2-2.5 hour, adds silane coupling agent kh560 after cooling, continue stirring reaction 2-3 hour, last underpressure distillation, slough the solvent in system, with the dry 60-80 minute of the temperature of 80-85 DEG C in vacuum drying oven, obtain active nano aluminium sesquioxide;

(2) send into after silicon carbide, trichroite powder, silicon-dioxide mixing in pulverizer, be ground into 200 order powder stand-by; PVP is added in the water of 10-12 times amount, be heated to 50-60 DEG C, be stirred to and dissolve completely, add above-mentioned 200 order powder, even with the speed dispersed with stirring of 800 revs/min, then add the urea soln that concentration is 20wt%, leave standstill after 100-120 minute 80 DEG C of stirred in water bath reactions, then carry out centrifugal, retain solid, clear water washs several times, finally puts into baking oven, dry with the temperature of 80-90 DEG C, obtain modified filler;

(3) hydroxy polyester resin, fluorocarbon resin, isocyanuric acid three-glycidyl ester are put into after homogenizer stirs 20-30 minute with the speed of 1000 revs/min and added active nano aluminium sesquioxide and modified filler, continue to stir discharging after 10-15 minute, compound is sent into twin screw melt extruder, continue to add all the other remaining components, melt extrude, compressing tablet, obtained fine powder through pulverizing 180 mesh sieves and get final product.

Advantage of the present invention is: the present invention adds a small amount of fluorocarbon resin Substitute For Partial hydroxy polyester resin, in the process of powder coating solidification, fluorocarbon chain section in fluorocarbon resin there occurs surface enrichment, so a small amount of fluorine just can significantly improve the hydro-oleophobicity of coating, the heat-proof water of coating, acid-proof alkaline and snappiness can be improved simultaneously; Coordinate and add through the obtained active nano aluminium sesquioxide of special process process, be easy to form chemical bonding with F-C key, make coating structure more firm, and the contact angle of coatingsurface to water sharply increases, further increase the hydrophobicity of coating, the powder coating made has anticorrosive, acid and alkali-resistance, weathering resistance, hydrophobic and lyophobic property etc. more than general powder coating excellence.

The present invention adds the compositions such as trichroite powder, silicon carbide, adds in the preparation of coating, have good heat loss through radiation effect by a series of process modification, coordinates the interpolation of heat-conducting silicone grease, further increases radiating efficiency.The powder coating that the present invention makes at pump valve material surface, can alleviate the high temperature that work brings, excellent in heat dissipation effect by electrostatic spraying, and coating hardness and snappiness have concurrently simultaneously, long service life.

Embodiment

A kind of pump valve heat radiating type powder coating, is made up of the raw material of following weight part (kilogram): the urea soln 9 that hydroxy polyester resin 52, fluorocarbon resin 7, isocyanuric acid three-glycidyl ester 4, nano-aluminium oxide 13, perfluoro capryl triethoxyl silane 0.8, concentration are the ethanolic soln 25 of 75wt%, silane coupling agent kh5600.5, heat-conducting silicone grease 1.5, silicon-dioxide 3, ethylene bis stearamide 0.6, silicon carbide 10, trichroite powder 13, PVP1.5, concentration are 20wt%, water are appropriate.

Described a kind of pump valve heat radiating type powder coating, is prepared from by following concrete steps:

(1) nano-aluminium oxide is put into the ethanolic soln that concentration is 75wt%, dispersed with stirring is even, then perfluoro capryl triethoxyl silane is added, reflux 2 hours, adds silane coupling agent kh560 after cooling, continue stirring reaction 2 hours, last underpressure distillation, slough the solvent in system, with the temperature of 80 DEG C drying 60 minutes in vacuum drying oven, obtain active nano aluminium sesquioxide;

(2) send into after silicon carbide, trichroite powder, silicon-dioxide mixing in pulverizer, be ground into 200 order powder stand-by; PVP is added in the water of 10 times amount, be heated to 50 DEG C, be stirred to and dissolve completely, add above-mentioned 200 order powder, even with the speed dispersed with stirring of 800 revs/min, then add the urea soln that concentration is 20wt%, leave standstill after 80 DEG C of stirred in water bath react 100 minutes, then carry out centrifugal, retain solid, clear water washs several times, finally puts into baking oven, dry with the temperature of 80 DEG C, obtain modified filler;

(3) hydroxy polyester resin, fluorocarbon resin, isocyanuric acid three-glycidyl ester are put into after homogenizer stirs 20 minutes with the speed of 1000 revs/min and added active nano aluminium sesquioxide and modified filler, continue stirring discharging after 10 minutes, compound is sent into twin screw melt extruder, continue to add all the other remaining components, melt extrude, compressing tablet, obtained fine powder through pulverizing 180 mesh sieves and get final product.

Electrostatic spraying constructional method is adopted to act on the device surface such as pump, valve powder coating of the present invention, through the abundant solidification of 180 DEG C, naturally cool to room temperature, place after 24 hours, measure coating performance: paint film appearance flat smooth, surface tinted is consistent, without particle, pin hole, bubble, wrinkle; Sticking power reaches 1 grade, and resistance to neutral salt spray 2000 hours is without exception, and resistance to impact shock is greater than 60cm.

Claims (2)

1. a pump valve heat radiating type powder coating, it is characterized in that, be made up of the raw material of following weight part: the urea soln 9-11 that hydroxy polyester resin 52-54, fluorocarbon resin 7-8, isocyanuric acid three-glycidyl ester 4-5, nano-aluminium oxide 13-15, perfluoro capryl triethoxyl silane 0.8-0.9, concentration are ethanolic soln 25-30, the silane coupling agent kh5600.5-0.6 of 75wt%, heat-conducting silicone grease 1.5-2, silicon-dioxide 3-4, ethylene bis stearamide 0.6-0.7, silicon carbide 10-12, trichroite powder 13-14, PVP1.5-2, concentration are 20wt%, water are appropriate.

2. a kind of pump valve heat radiating type powder coating according to claim 1, is characterized in that, be prepared from by following concrete steps:

(1) nano-aluminium oxide is put into the ethanolic soln that concentration is 75wt%, dispersed with stirring is even, then perfluoro capryl triethoxyl silane is added, reflux 2-2.5 hour, adds silane coupling agent kh560 after cooling, continue stirring reaction 2-3 hour, last underpressure distillation, slough the solvent in system, with the dry 60-80 minute of the temperature of 80-85 DEG C in vacuum drying oven, obtain active nano aluminium sesquioxide;

(2) send into after silicon carbide, trichroite powder, silicon-dioxide mixing in pulverizer, be ground into 200 order powder stand-by; PVP is added in the water of 10-12 times amount, be heated to 50-60 DEG C, be stirred to and dissolve completely, add above-mentioned 200 order powder, even with the speed dispersed with stirring of 800 revs/min, then add the urea soln that concentration is 20wt%, leave standstill after 100-120 minute 80 DEG C of stirred in water bath reactions, then carry out centrifugal, retain solid, clear water washs several times, finally puts into baking oven, dry with the temperature of 80-90 DEG C, obtain modified filler;

(3) hydroxy polyester resin, fluorocarbon resin, isocyanuric acid three-glycidyl ester are put into after homogenizer stirs 20-30 minute with the speed of 1000 revs/min and added active nano aluminium sesquioxide and modified filler, continue to stir discharging after 10-15 minute, compound is sent into twin screw melt extruder, continue to add all the other remaining components, melt extrude, compressing tablet, obtained fine powder through pulverizing 180 mesh sieves and get final product.