CN105440870A - Water-resistant and anticorrosive coating suitable for humid environment and used for pump valve - Google Patents

Abstract

The invention discloses a water-resistant and anticorrosive coating suitable for the humid environment and used for a pump valve. The water-resistant and anticorrosive coating is prepared from raw materials in parts by weight as follows: 65-70 parts of methyl methacrylate, 60-65 parts of styrene, 0.5-0.6 parts of ammonium persulfate, 4-5 parts of phosphate ester monomers, 20-24 parts of deionized water, 2-3 parts of SDS (sodium dodecyl sulfate), 35-40 parts of glass flakes, 1-1.2 parts of a silane coupling agent KH560, 30-35 parts of ethanol with the concentration being 75wt%, 40-43 parts of a sodium hydroxide solution with the concentration being 10wt%, 2-3 parts of isopropyl alcohol, 3-4 parts of catechol, 2-3 parts of linseed oil, 5-7 parts of talcum powder, 2-2.5 parts of emulsified asphalt, 7-9 parts of polypropylene fiber, 2-3 parts of redispersible rubber powder, 3-4 parts of stearic acid, 19-22 parts of light calcium carbonate and an appropriate amount of water. The water-resistant and anticorrosive coating has high adhesive force on the surface of a cast pump valve device, a coating film is not prone to fall off, and the coating has good water resistance and excellent corrosion resistance and is suitable for being used for the pump valve in the humid environment.

Description

A kind of pump valve Waterproof corrosion coating being applicable to wet environment

Technical field

The present invention relates to technical field of coatings, particularly relate to a kind of pump valve Waterproof corrosion coating being applicable to wet environment.

Background technology

The environment of pump valve work is various, badly, very high to the requirement of material, the material of current pump valve has varied, and technology has very much progress, but still have a lot of problem to exist, during in particular for conveying liquid, require very high to the rustless property of pump valve, common paint often can not meet the needs of environment, this carries out modification with regard to needing the coating of many pump valves, thus prepares the pump valve coating be more applicable to.

In order to ensure the anticorrosive quality of coating, traditional anticorrosive coating needed to carry out surface treatment thoroughly by certain means to steel before construction, expense required for conventional surface treatment process probably accounts for the 30%-40% of application total expenses, and the cost of coating itself only accounts for about 19%, and conventional surface treatment process easily produces a large amount of dust pollutions and sound pollution, surface treatment even can not carried out by traditional sandblasting means in more special occasion such as Complicated Steel iron construction dead angle, therefore find and a kind ofly compare environmental protection and the higher process means tool of cost performance is of great significance.Because environment protection is more and more subject to people's attention; and the volatile organic matter (VOC) that traditional solvent-borne coating discharges in manufacture, construction, dry solidification process is the important sources of environmental pollution, each state has all worked out corresponding environmental regulation to limit the discharge of VOC in coating for this reason.Therefore, the powder coating of current environment-friendly type, high solid coating, photocuring, water-borne coatings are research emphasis and the new lover of coating industry, and wherein water-borne coatings becomes with its stronger perviousness and is most suitable for containing the environment-friendly type coating that uses on rust metal base.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides the Waterproof corrosion coating of a kind of pump valve with being applicable to wet environment.

The present invention is achieved by the following technical solutions:

A kind of pump valve Waterproof corrosion coating being applicable to wet environment, be made up of the raw material of following weight part: methyl methacrylate 65-70, vinylbenzene 60-65, ammonium persulphate 0.5-0.6, phosphate ester monomer 4-5, deionized water 20-24, SDS2-3, glass flake 35-40, silane coupling agent KH5601-1.2, concentration is the ethanol 30-35 of 75wt%, concentration is the sodium hydroxide solution 40-43 of 10wt%, Virahol 2-3, pyrocatechol 3-4, oleum lini 2-3, talcum powder 5-7, emulsified bitumen 2-2.5, polypropylene fibre 7-9, re-dispersible glue powder 2-3, stearic acid 3-4, light calcium carbonate 19-22, water is appropriate.

Described a kind of pump valve Waterproof corrosion coating being applicable to wet environment, is prepared from by following concrete steps:

(1) deionized water is mixed with SDS, put into reactor, warming while stirring is to 70-80 DEG C, then the methyl methacrylate of half amount, vinylbenzene and ammonium persulphate is added, constant temperature stirs the methyl methacrylate, vinylbenzene and the phosphate ester monomer that continue to add residual content after 30-40 minute, insulation 2-3 hour, obtains the ACRYLIC EMULSION of phosphate ester-containing;

(2) pulverized by glass flake, cross 100 mesh sieves, being then placed on concentration is soak 30-40 minute in the sodium hydroxide solution of 10wt%, filters, washes with water to neutrality stand-by; The ethanol being 75wt% by silane coupling agent KH560 and concentration is mixed to form solution, glass flake after above-mentioned alkaline purification is placed in one, uniform stirring 30-40 minute, in an oven with the dry 2-2.5 hour of the temperature of 80-90 DEG C after filtration, obtains surface modified glass scale;

(3) mix with light calcium carbonate, talcum powder after polypropylene fibre being shredded, put into pulverizer and pulverize, cross 200 mesh sieves, then mixed powder is sent in ball mill, add stearic acid, oleum lini, be heated to 75-85 DEG C, ball milling 40-50 minute, discharging post-drying obtains modified filler; Emulsified bitumen is added in the water of 20-22 times amount, be stirred to and be uniformly dispersed, add Virahol, pyrocatechol, modified filler is added after stirring 15-25 minute with the speed of 300 revs/min, stir under the speed of 2000 revs/min, until slurry fineness is less than 45 μm, obtain mixed slurry;

(4) mixed slurry that ACRYLIC EMULSION and the step (3) of the phosphate ester-containing finally step (1) obtained obtain mixes, and adds all the other remaining components, stirs and get final product with the speed of 600 revs/min.

Advantage of the present invention is: first the present invention adds appropriate phosphate ester monomer in the layoutprocedure of ACRYLIC EMULSION, not only emulsion intercalation method can be improved, and fine and close phosphatize phosphate coat can be formed with ground, while improving sticking power, improve Corrosion Protection; The present invention adds appropriate Virahol, pyrocatechol as turning rust agent, and good penetrability, can react with the floating rust on pump valve surface; The present invention also with the addition of the glass flake of surface modification in the layoutprocedure of coating, in the coating that can disperse uniformly, substantially prolongs approach and the time of medium osmosis simultaneously, corresponding anti-permeability performance and the corrosion-resistant life that improve coating.The present invention is coordinated with ACRYLIC EMULSION by the function raw material adding multiple-anticorrosion erosion, and the coating made possesses good preservative effect, and cost is low simultaneously, and VOC free discharges, safety and environmental protection.

The common constituents such as talcum powder, light calcium carbonate, polypropylene fibre add in the preparation of coating by modification by a series of technique by the present invention, not only possess good hydrophobicity, can improve the shock-resistance of film simultaneously; The present invention is high at the sticking power of casting pump valve device surface, film difficult drop-off, and water resistance is good, and the pump valve be applicable in wet condition uses, and antiseptic property is excellent.

Embodiment

The pump valve Waterproof corrosion coating being applicable to wet environment, is made up of the raw material of following weight part (kilogram): the sodium hydroxide solution 40 that the ethanol 30 that methyl methacrylate 65, vinylbenzene 60, ammonium persulphate 0.5, phosphate ester monomer 4, deionized water 20, SDS2, glass flake 35, silane coupling agent KH5601, concentration are 75wt%, concentration are 10wt%, Virahol 2, pyrocatechol 3, oleum lini 2, talcum powder 5, emulsified bitumen 2, polypropylene fibre 7, re-dispersible glue powder 2, stearic acid 3, light calcium carbonate 19, water are appropriate.

Described a kind of pump valve Waterproof corrosion coating being applicable to wet environment, is prepared from by following concrete steps:

(1) deionized water is mixed with SDS, put into reactor, warming while stirring to 80 DEG C, then the methyl methacrylate of half amount, vinylbenzene and ammonium persulphate is added, constant temperature continues to add the methyl methacrylate of residual content, vinylbenzene and phosphate ester monomer after stirring 30 minutes, be incubated 2 hours, obtain the ACRYLIC EMULSION of phosphate ester-containing;

(2) pulverized by glass flake, cross 100 mesh sieves, being then placed on concentration is soak 30 minutes in the sodium hydroxide solution of 10wt%, filters, washes with water to neutrality stand-by; The ethanol being 75wt% by silane coupling agent KH560 and concentration is mixed to form solution, is placed in one by the glass flake after above-mentioned alkaline purification, uniform stirring 30 minutes, in an oven with the temperature of 90 DEG C drying 2 hours after filtration, obtains surface modified glass scale;

(3) mix with light calcium carbonate, talcum powder after polypropylene fibre being shredded, put into pulverizer and pulverize, cross 200 mesh sieves, then mixed powder is sent in ball mill, add stearic acid, oleum lini, be heated to 80 DEG C, ball milling 40 minutes, discharging post-drying obtains modified filler; Emulsified bitumen is added in the water of 20 times amount, be stirred to and be uniformly dispersed, add Virahol, pyrocatechol, modified filler is added after stirring 15 minutes with the speed of 300 revs/min, stir under the speed of 2000 revs/min, until slurry fineness is less than 45 μm, obtain mixed slurry;

(4) mixed slurry that ACRYLIC EMULSION and the step (3) of the phosphate ester-containing finally step (1) obtained obtain mixes, and adds all the other remaining components, stirs and get final product with the speed of 600 revs/min.

Coating of the present invention can reach even stability in storage more than 18 months, and resistance to salt water 17 days is non-foaming, and salt fog resistance 10 days is non-foaming, and water tolerance 16 days is non-foaming, and sticking power reaches 1 grade, and in 30 minutes, rust transformation degree reaches 98%.

Claims (2)

1. the pump valve Waterproof corrosion coating being applicable to wet environment, it is characterized in that, be made up of the raw material of following weight part: methyl methacrylate 65-70, vinylbenzene 60-65, ammonium persulphate 0.5-0.6, phosphate ester monomer 4-5, deionized water 20-24, SDS2-3, glass flake 35-40, silane coupling agent KH5601-1.2, concentration is the ethanol 30-35 of 75wt%, concentration is the sodium hydroxide solution 40-43 of 10wt%, Virahol 2-3, pyrocatechol 3-4, oleum lini 2-3, talcum powder 5-7, emulsified bitumen 2-2.5, polypropylene fibre 7-9, re-dispersible glue powder 2-3, stearic acid 3-4, light calcium carbonate 19-22, water is appropriate.

2. a kind of pump valve use is applicable to the Waterproof corrosion coating of wet environment according to claim 1, it is characterized in that, is prepared from by following concrete steps:

(1) deionized water is mixed with SDS, put into reactor, warming while stirring is to 70-80 DEG C, then the methyl methacrylate of half amount, vinylbenzene and ammonium persulphate is added, constant temperature stirs the methyl methacrylate, vinylbenzene and the phosphate ester monomer that continue to add residual content after 30-40 minute, insulation 2-3 hour, obtains the ACRYLIC EMULSION of phosphate ester-containing;

(2) pulverized by glass flake, cross 100 mesh sieves, being then placed on concentration is soak 30-40 minute in the sodium hydroxide solution of 10wt%, filters, washes with water to neutrality stand-by; The ethanol being 75wt% by silane coupling agent KH560 and concentration is mixed to form solution, glass flake after above-mentioned alkaline purification is placed in one, uniform stirring 30-40 minute, in an oven with the dry 2-2.5 hour of the temperature of 80-90 DEG C after filtration, obtains surface modified glass scale;

(3) mix with light calcium carbonate, talcum powder after polypropylene fibre being shredded, put into pulverizer and pulverize, cross 200 mesh sieves, then mixed powder is sent in ball mill, add stearic acid, oleum lini, be heated to 75-85 DEG C, ball milling 40-50 minute, discharging post-drying obtains modified filler; Emulsified bitumen is added in the water of 20-22 times amount, be stirred to and be uniformly dispersed, add Virahol, pyrocatechol, modified filler is added after stirring 15-25 minute with the speed of 300 revs/min, stir under the speed of 2000 revs/min, until slurry fineness is less than 45 μm, obtain mixed slurry;

(4) mixed slurry that ACRYLIC EMULSION and the step (3) of the phosphate ester-containing finally step (1) obtained obtain mixes, and adds all the other remaining components, stirs and get final product with the speed of 600 revs/min.