CN105462451A - Modified barite powder added powder coating for pump valve - Google Patents

Abstract

The invention discloses a modified barite powder added powder coating for a pump valve. The powder coating is prepared from the following raw materials in parts by weight: 52-54 parts of hydroxy 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 part of perfluorooctyl triethoxysilane, 25-30 parts of an ethanol solution with the concentration of 75wt%, 0.5-0.6 part of a silane coupling agent kh560, 1.3-1.5 parts of polybutyl acrylate, 1-1.3 parts of glycerol triacetate, 18-20 parts of barite, 1.5-2 parts of solid paraffin, 0.3-0.4 part of sodium lauryl sulfate, 0.8-1 part of a wetting accelerator LD-608A and a proper amount of water. A powder coating layer made of the powder coating is excellent in hydrophobicity; the powder coating is very suitable for the pump valve used outside, the anticorrosion performance is further improved, and the product service life is prolonged.

Description

A kind of pump valve powder coating adding modified barite powder

Technical field

The present invention relates to technical field of coatings, particularly relate to a kind of pump valve powder coating adding modified barite powder.

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 powder coating adding modified barite powder.

The present invention is achieved by the following technical solutions:

Add a pump valve powder coating for modified barite powder, be made up of the raw material of following weight part: 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 that ethanolic soln 25-30, the silane coupling agent kh5600.5-0.6 of 75wt%, butyl polyacrylate 1.3-1.5, Vanay 1-1.3, barite 18-20, solid paraffin 1.5-2, sodium lauryl sulphate 0.3-0.4, wetting enhancer LD-608A0.8-1, water are appropriate.

Described a kind of pump valve powder coating adding modified barite powder, 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) barite is broken into fritter, then puts into retort furnace, with the temperature calcination 90-120 minute of 500-600 DEG C, naturally coldly go rear taking-up, pulverized 200 mesh sieves, and then added in the water of 4-5 times amount, be heated to 85-95 DEG C, continue to add sodium lauryl sulphate, solid paraffin after dispersed with stirring is even, continue to stir 20-30 minute, then leave standstill and filter, filter cake is put into baking oven, dry with the temperature of 100-110 DEG C, grinding distribution after taking out, obtains 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 also with the addition of the compositions such as barite in the processing of product, by the surface of modification by coated for the composition such as solid paraffin, the sodium lauryl sulphate powder of barite after firing, effectively improve its dispersiveness in coating and hydrophobicity, the powder coating coating made is made to possess good hydrophobicity, be highly suitable for the pump valve material of outdoor use, further raising antiseptic property, extends the work-ing life of product.

Embodiment

Add a pump valve powder coating for modified barite powder, be made up of the raw material of following weight part (kilogram): 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 that the ethanolic soln 25 of 75wt%, silane coupling agent kh5600.5, butyl polyacrylate 1.3, Vanay 1, barite 18, solid paraffin 1.5, sodium lauryl sulphate 0.3, wetting enhancer LDA0.8, water are appropriate.

Described a kind of pump valve powder coating adding modified barite powder, 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) barite is broken into fritter, then puts into retort furnace, with the temperature calcination 90-120 minute of 500 DEG C, naturally coldly go rear taking-up, pulverized 200 mesh sieves, and then added in the water of 4 times amount, be heated to 85 DEG C, continue to add sodium lauryl sulphate, solid paraffin after dispersed with stirring is even, continue stirring 20 minutes, then leave standstill and filter, filter cake is put into baking oven, dry with the temperature of 100 DEG C, grinding distribution after taking out, obtains 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. one kind is added the pump valve powder coating of modified barite powder, it is characterized in that, be made up of the raw material of following weight part: 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 is the ethanolic soln 25-30 of 75wt%, silane coupling agent kh5600.5-0.6, butyl polyacrylate 1.3-1.5, Vanay 1-1.3, barite 18-20, solid paraffin 1.5-2, sodium lauryl sulphate 0.3-0.4, wetting enhancer LD-608A0.8-1, water is appropriate.

2. a kind of pump valve powder coating adding modified barite powder 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) barite is broken into fritter, then puts into retort furnace, with the temperature calcination 90-120 minute of 500-600 DEG C, naturally coldly go rear taking-up, pulverized 200 mesh sieves, and then added in the water of 4-5 times amount, be heated to 85-95 DEG C, continue to add sodium lauryl sulphate, solid paraffin after dispersed with stirring is even, continue to stir 20-30 minute, then leave standstill and filter, filter cake is put into baking oven, dry with the temperature of 100-110 DEG C, grinding distribution after taking out, obtains 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.