CN105482648A - Anticorrosive and antirust powder coating for pipeline - Google Patents

Abstract

The invention discloses an anticorrosive and antirust powder coating for a pipeline. The powder coating is prepared from the following raw materials in parts by weight: 8 to 9 parts of palygorskite, 0.16 to 0.2 parts of an aluminum-zirconium coupling agent, 0.5 to 0.6 parts of an organic silicone leveling agent, 0.2 to 0.3 parts of polydimethyl siloxane, 8 to 10 parts of titanium dioxide, 5 to 6 parts of graphene, 1 to 2 parts of rubber powder, 0.2 to 0.3 parts of octadecenedioic acid, 2 to 3 parts of dibutyl sebacate, 4 to 5 parts of a dicyandiamide curing agent, 90 to 100 parts of bisphenol A type epoxy resin, 6 to 8 parts of phenol-formaldehyde resin, 0.1 to 0.2 parts of rare earth chloride, 15 to 18 parts of chitosan and 4 to 5 parts of polyvinyl alcohol. A preparation process is simple, the raw materials are easily obtained, a cured film is high in hardness and anticorrosive and antirust performance, and has remarkable economical and social benefits, and service life of the pipeline can be prolonged when the powder coating is used for the pipeline.

Description

A kind of anti-corrosion antirust powder paint for pipeline

Technical field

The present invention relates to powder coating technology field, particularly relate to a kind of anti-corrosion antirust powder paint for pipeline.

Background technology

Powder coating has solvent-free property, non-environmental-pollution, Powder Recovery and utilization ratio high, is utilized widely.Powder coating can be divided into the large class of thermoplasticity, thermoset two.Thermoplastic powder coating is using thermoplastic resin as filmogen, its feature is that synthetic resins raises and deliquescing with temperature, and after cooling, become hard, this process can be carried out repeatedly repeatedly, often changing once will be progressively aging, finally becomes the powder of non-plastic.Thermosetting powder coating(s) is using thermoset synthetic resin as filmogen.Its feature is with some prepolymer resin compared with low polymerization degree, in the presence of a curing agent through the baking-curing of certain temperature, and becomes and can not dissolve or the scleroid final product of melting.When temperature is when raising, product can only decompose and can not soften again, belongs to chemical transformation.Because molecular resin amount is low, so have good levelling property, wettability, firmly can adhere to surface of workpiece, and have ornamental and non-corrosibility preferably after solidification.But be that to be used as decorative coating in the majority all the time at China's powder coating.

The patent No. is point out along with the demand of various countries to the energy is increasing in CN201510396989.7 " a kind of new type low temperature cured epoxy powder coating " patent, reduce energy consumption, protection of the environment becomes the main body of enterprise development, exploitation cold curing paint is that the universal powder coating solidification temperature of solution is higher, narrow application range, the important method that energy consumption is large, it utilizes bisphenol A type epoxy resin and the good compatible feature of modified crosslinking agent, coating is made to have excellent sticking power, shock-resistant, the advantages such as wet-heat resisting, filler adopts process white and active micro silicon powder to make coating have good acid resistance and alkali resistance, but the powder coating inventing preparation thus can not meet corrosion, antibacterial and protection field demand.The present invention has low solidification value by the powder coating that rational formulating of recipe obtains, expand application prospect, and study on the modification is carried out to resin matrix, the corrosion-resistant, weather-proof, antibacterial of powder coating and physical strength etc. are improved, meet the requirement for decoration and protection field each side on market.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of anti-corrosion antirust powder paint for pipeline.

The present invention is achieved by the following technical solutions:

For an anti-corrosion antirust powder paint for pipeline, be made up of the raw material of following weight part: polygorskite 8-9, aluminum-zirconium coupling agent 0.16-0.2, organosilicon flow agent 0.5-0.6, polydimethylsiloxane 0.2-0.3, titanium dioxide 8-10, Graphene 5-6, rubber powder 1-2, octadecene diacid 0.2-0.3, SA dibutylester 2-3, dicy-curing agent 4-5, bisphenol A type epoxy resin 90-100, resol 6-8, rare earth chloride 0.1-0.2, chitosan 15-18, polyvinyl alcohol 4-5.

Described a kind of anti-corrosion antirust powder paint for pipeline, be made up of following concrete steps:

(1) polygorskite is heated at 500-600 DEG C 1-2h dehydration, be added in the flask with stirrer after cooling, stir with the rotating speed of 900-1000r/min, temperature controls at 60-65 DEG C, then aluminum-zirconium coupling agent dehydrated alcohol is diluted according to solid-to-liquid ratio 1:5, be sprayed on dehydration polygorskite after hydrolysis, at room temperature slowly dry after stirring 10-15min and obtain modified paligorskite;

(2) polygorskite powder and 0.1mol/L silver nitrate solution are mixed according to solid-to-liquid ratio 1:10-12, at 50-60 DEG C, pH is stirring reaction 4-5h under 6-8 condition, after reaction terminates, carry out centrifugation, solid is washed with distilled water to without silver ions in washing lotion, finally dry for standby at 100-110 DEG C;

(3) chitosan is dissolved in the acetic acid solution of 85%, it is 6-10% chitosan solution that magnetic agitation evenly makes concentration, polyvinyl alcohol water dissolution being made concentration is 8-10% solution, be heated to 80-85 DEG C, then chitosan solution is added in polyvinyl alcohol water solution, add product ultrasonic disperse prepared by step (2) more even, standing and defoaming obtains spinning solution;

(4) by resol and rare earth chloride mixing, heated and stirred reaction 10-15min, when temperature of reaction is at 80-85 DEG C, constant temperature keeps 10-15min, then boiling is heated to, under boiling state, keep 3-4h, naturally cool to room temperature, then make with the alcohol dilution of 75% novolac solution that concentration is 10-12%, be added to mixing and stirring in product prepared by step (3) again, obtain conjugated fibre through electrostatic spinning process for subsequent use;

(5) product bisphenol A type epoxy resin, dicy-curing agent and step (4) prepared drops in high mixer and stirs, by all the other surplus stock mixing flour to 100 orders, continue to drop in high speed machine and stir, finally by mixing material after 70-80 DEG C of preheating melting mixing 20-30min, be cooled to room temperature, be ground into the powder that particle diameter is 20-35 μm again, finally carry out metering packing, discharging.

Advantage of the present invention is: the present invention utilizes rare earth chloride volatile de-electronation reactive behavior high, generates extremely strong chemical bond, make it heat-resisting with reactive modified phenolic resin, the performances such as wear-resisting and erosion resistance are improved, and utilize chitosan itself nontoxic, the features such as broad-spectrum antimicrobial and modified phenolic resins, filler is blended prepares conjugated fibre, utilizes conjugated fibre and substrate ring epoxy resins generation copolymerzation with cross-linking to react, adds the cross-linking density of system, improve film media-resistant penetrating power, its water-intake rate is reduced, and resistance to cracking is improved, and also improves the corrosion-resistant of powder coating simultaneously, the performances such as antibacterial and toughness, improve the shortcoming that the easy crisp period of storage easy to crack of epoxy resin itself is not grown, interpolation carry silver-colored polygorskite powder, titanium dioxide and Graphene etc. improve the antibacterial of powder coating greatly, anticorrosion, antirust, wear-resisting, the performance of the aspect such as heat-resisting, preparation technology of the present invention is simple, raw material is easy to get, and after solidification, hardness of paint film is good, anticorrosion, rustless property is high, can increase the service life for pipeline, possesses significant economic and social benefit.

Embodiment

For an anti-corrosion antirust powder paint for pipeline, be made up of the raw material of following weight part (kilogram): polygorskite 8, aluminum-zirconium coupling agent 0.16, organosilicon flow agent 0.5, polydimethylsiloxane 0.2, titanium dioxide 8, Graphene 5, rubber powder 1, octadecene diacid 0.2, SA dibutylester 2, dicy-curing agent 4, bisphenol A type epoxy resin 90, resol 6, rare earth chloride 0.1, chitosan 15, polyvinyl alcohol 4.

Described a kind of anti-corrosion antirust powder paint for pipeline, be made up of following concrete steps:

(1) polygorskite is heated at 500 DEG C 1h dehydration, be added in the flask with stirrer after cooling, stir with the rotating speed of 900r/min, temperature controls at 60 DEG C, then aluminum-zirconium coupling agent dehydrated alcohol is diluted according to solid-to-liquid ratio 1:5, be sprayed on dehydration polygorskite after hydrolysis, at room temperature slowly dry after stirring 10min and obtain modified paligorskite;

(2) polygorskite powder and 0.1mol/L silver nitrate solution are mixed according to solid-to-liquid ratio 1:10, at 50 DEG C, pH is stirring reaction 4h under 6 conditions, after reaction terminates, carry out centrifugation, solid is washed with distilled water to without silver ions in washing lotion, finally dry for standby at 100 DEG C;

(3) chitosan is dissolved in the acetic acid solution of 85%, it is 6% chitosan solution that magnetic agitation evenly makes concentration, polyvinyl alcohol water dissolution being made concentration is 8% solution, be heated to 80 DEG C, then chitosan solution is added in polyvinyl alcohol water solution, add product ultrasonic disperse prepared by step (2) more even, standing and defoaming obtains spinning solution;

(4) by resol and rare earth chloride mixing, heated and stirred reaction 10min, when temperature of reaction is at 80 DEG C, constant temperature keeps 10min, then boiling is heated to, under boiling state, keep 3h, naturally cool to room temperature, then make with the alcohol dilution of 75% novolac solution that concentration is 10%, be added to mixing and stirring in product prepared by step (3) again, obtain conjugated fibre through electrostatic spinning process for subsequent use;

(5) product bisphenol A type epoxy resin, dicy-curing agent and step (4) prepared drops in high mixer and stirs, by all the other surplus stock mixing flour to 100 orders, continue to drop in high speed machine and stir, finally by mixing material after 70 DEG C of preheating melting mixing 20min, be cooled to room temperature, be ground into the powder that particle diameter is 20 μm again, finally carry out metering packing, discharging.

After the powder coating solidification using the present invention to prepare, film performance is as follows:

Paint film appearance flat smooth, surface tinted is consistent, without particle, pin hole, bubble, wrinkle; Sticking power reaches 1 grade; Salt-fog resistant test: 2000 hours without exception; Water-intake rate (5 days, 90 DEG C): 4.0%; Shock resistance is greater than 50cm; Flexural strength: 5mm.

Claims (2)

1. the anti-corrosion antirust powder paint for pipeline, it is characterized in that, be made up of the raw material of following weight part: polygorskite 8-9, aluminum-zirconium coupling agent 0.16-0.2, organosilicon flow agent 0.5-0.6, polydimethylsiloxane 0.2-0.3, titanium dioxide 8-10, Graphene 5-6, rubber powder 1-2, octadecene diacid 0.2-0.3, SA dibutylester 2-3, dicy-curing agent 4-5, bisphenol A type epoxy resin 90-100, resol 6-8, rare earth chloride 0.1-0.2, chitosan 15-18, polyvinyl alcohol 4-5.

2. a kind of anti-corrosion antirust powder paint for pipeline according to claim 1, is characterized in that, be made up of following concrete steps:

(1) polygorskite is heated at 500-600 DEG C 1-2h dehydration, be added in the flask with stirrer after cooling, stir with the rotating speed of 900-1000r/min, temperature controls at 60-65 DEG C, then aluminum-zirconium coupling agent dehydrated alcohol is diluted according to solid-to-liquid ratio 1:5, be sprayed on dehydration polygorskite after hydrolysis, at room temperature slowly dry after stirring 10-15min and obtain modified paligorskite;

(2) polygorskite powder and 0.1mol/L silver nitrate solution are mixed according to solid-to-liquid ratio 1:10-12, at 50-60 DEG C, pH is stirring reaction 4-5h under 6-8 condition, after reaction terminates, carry out centrifugation, solid is washed with distilled water to without silver ions in washing lotion, finally dry for standby at 100-110 DEG C;

(3) chitosan is dissolved in the acetic acid solution of 85%, it is 6-10% chitosan solution that magnetic agitation evenly makes concentration, polyvinyl alcohol water dissolution being made concentration is 8-10% solution, be heated to 80-85 DEG C, then chitosan solution is added in polyvinyl alcohol water solution, add product ultrasonic disperse prepared by step (2) more even, standing and defoaming obtains spinning solution;

(4) by resol and rare earth chloride mixing, heated and stirred reaction 10-15min, when temperature of reaction is at 80-85 DEG C, constant temperature keeps 10-15min, then boiling is heated to, under boiling state, keep 3-4h, naturally cool to room temperature, then make with the alcohol dilution of 75% novolac solution that concentration is 10-12%, be added to mixing and stirring in product prepared by step (3) again, obtain conjugated fibre through electrostatic spinning process for subsequent use;

(5) product bisphenol A type epoxy resin, dicy-curing agent and step (4) prepared drops in high mixer and stirs, by all the other surplus stock mixing flour to 100 orders, continue to drop in high speed machine and stir, finally by mixing material after 70-80 DEG C of preheating melting mixing 20-30min, be cooled to room temperature, be ground into the powder that particle diameter is 20-35 μm again, finally carry out metering packing, discharging.