CN106566363B - A kind of disc type electrostatic spraying technique suitable for water-based anticorrosive paint used for vehicle transmission shaft - Google Patents
A kind of disc type electrostatic spraying technique suitable for water-based anticorrosive paint used for vehicle transmission shaft Download PDFInfo
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- CN106566363B CN106566363B CN201610918712.0A CN201610918712A CN106566363B CN 106566363 B CN106566363 B CN 106566363B CN 201610918712 A CN201610918712 A CN 201610918712A CN 106566363 B CN106566363 B CN 106566363B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
- C08F283/105—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule on to unsaturated polymers containing more than one epoxy radical per molecule
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
- C08G59/1455—Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof
- C08G59/1461—Unsaturated monoacids
- C08G59/1472—Fatty acids
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/086—Organic or non-macromolecular compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Abstract
The invention discloses a kind of disc type electrostatic spraying techniques suitable for water-based anticorrosive paint used for vehicle transmission shaft, steel construction piece using disc type electrostatic gun toward surface by ferric solid-acid processing sprays water-based anticorrosive paint, then dry, wherein, the water-based anticorrosive paint includes the component of following weight percent: oxidation drying type ring oxygen phosphate resins 50~70%, pigment and filler 5~15%, functional rust resisting pigment 5~15%, functional promotor 1~2%, deionized water 10~20%.Invention additionally discloses a kind of water paints.The present invention solves the problems, such as the technical issues of how ferric solid-acid processing steel construction piece aqueous one-component coating corrosion resistance, the offline drying property of low-temperature setting one-component coating, resistance to bond problem and single-component water-based coating technology meet disc type electrostatic spraying sagging and levelling.
Description
Technical field
The present invention relates to a kind of coating process, especially a kind of disk suitable for water-based anticorrosive paint used for vehicle transmission shaft
Formula electrostatic spraying technique.
Background technique
After on October 1st, 2015 " volatile organic matter Pollution Charges Site method " announcement, replaced with water organic molten
Agent has become the inexorable trend of coating industry development.Water-based anticorrosive paint takes water as a solvent, and avoids containing benzene etc. organic molten
The safety problems such as inflammable and explosive and environmental protection brought by agent, health problem and increasingly by market welcome.Truck drive shaft
For round tube shaped steel structure piece, wall thickness, thermally conductive workpiece is handled frequently with phosphating liquor of iron series slowly, and surface is in colored shiny surface, therefore is led
Causing aqueous coating, its is corrosion-resistant worse；Workpiece generallys use disc type electrostatic spraying technique, and disposable film thickness is micro- up to 50-70
Rice, at present domestic automobile transmission shaft coating mainly based on dual-component polyurethane system and epoxy systems coating, exist serious easy
Explosive danger is fired, VOC emission is high, seriously affects the health of spraying workman, therefore, truck drive shaft coating is badly in need of to environmental protection
Change, low-carbon direction is developed.
CN 104558436A discloses the preparation side of a kind of acrylated epoxy phosphate resins and its aqueous dispersion
Method introduces phosphate group using phosphoric acid and epoxy reaction, is modified by acrylic ester monomer, introduces hydrophily carboxyl,
It the advantage is that epoxy resin used is that solids epoxy, molecular weight are big, fast drying, hydroxyl is more in resin, needs to add amino
Crosslinking curing under resin high temperature；Its shortcoming is that without cross-linked structure in resin LOTES process, linear macromolecule resin,
Corrosion-resistant difference.
CN101851396A discloses a kind of water-base epoxy ester resin composition and preparation method thereof and with its preparation
It is modified to prepare hexenoic acid by prefabricated containing carboxyl vinyl polymer and fatty acid and epoxy resin ring-opening reaction for water paint
Epoxy ester resin.The advantage is that realizes epoxy resin low temperature or room temperature crosslinking curing；Its shortcoming is that the asphalt mixtures modified by epoxy resin used
Rouge is high epoxide equivalent resin, and dry slowly, easily to after-tack, resin itself wetability is poor, the functionality not being bonded with metal base
Group, corrosion resistance are general.
CN 101085898A discloses a kind of environment-friendly type normal temperature solidifying water epoxy resin coating and preparation method thereof,
The water paint being related to is two-component epoxy coating, prepares waterborne epoxy coatings using direct emulsification-solidification method, thus prepares
Water paint has excellent performance.But dual-component coating construction pot-life is short, and construction is inconvenient, easily cause waste, and with
The increase of time, the performance decline of paint is very fast, is unfavorable for transmission shaft electrostatic spraying.It can be seen that the water announced at present
Property coating technology coating process or water-base resin technology all not can satisfy truck drive shaft low-temperature setting, flow line production with
And the single-component water-based coating of highly corrosion resistant.
Summary of the invention
An object of the present invention is to provide a kind of disc type electrostatic suitable for water-based anticorrosive paint used for vehicle transmission shaft
Coating process solves the problems, such as that ferric solid-acid processing steel construction piece aqueous one-component coating corrosion resistance, low-temperature setting one-component apply
How the offline drying property of layer, resistance to bond problem and single-component water-based coating technology meet disc type electrostatic spraying sagging and levelling
The technical issues of.
First purpose of the invention is achieved through the following technical solutions: one kind being suitable for water-repellent preservation used for vehicle transmission shaft
The disc type electrostatic spraying technique of coating: the steel construction piece using disc type electrostatic gun toward surface by ferric solid-acid processing sprays
Water-based anticorrosive paint is applied, is then dried, wherein the water-based anticorrosive paint includes the component of following weight percent:
Oxidation drying type ring oxygen phosphate resins 50~70%
Pigment and filler 5~15%
Functional rust resisting pigment 5~15%
Functional promotor 1~2%
Deionized water 10~20%.
The construction site ambient humidity 50-80% of coating process of the invention, temperature 0-45 degree；The workpiece is tubular type
Steel construction piece, workpiece surface temperature reaches 35-45 degree before coating；The disk diameter of the disc type electrostatic gun is 12 lis
Rice, spray distance are 1.4 meters, and disc rotation speed turns for 20000-30000, and electrostatic high-pressure is 50-75 kilovolts, it is desirable that paint application is viscous
For degree at 25 DEG C, applying 2# glasss is 20-30 seconds, and paint application thixotroping value is between 2.0-2.5.The drying mode refers to 80 degree
It does solid work within 30 minutes, stacks and do not after-tack after offline.Present invention spraying is disposable thick painting, i.e. thickness of dry film is greater than 50 microns.
The second object of the present invention is to provide a kind of water paint of above-mentioned coating process.Specifically, the aqueous painting
Material includes the component of following weight percent:
Oxidation drying type ring oxygen phosphate resins 50~70%
Pigment and filler 5~15%
Functional rust resisting pigment 5~15%
Functional promotor 1~2%
Deionized water 10~20%.
Oxidation drying type ring oxygen phosphate resins of the present invention refer to epoxy group, bound phosphate groups and not
It is saturated the acrylated phosphate modified macromer amount epoxy ester resin of conjugated double bond.As an embodiment of the present invention, the oxygen
Change drying type epoxy phosphate ester resin mainly by epoxy resin E03, fatty acid and acrylic ester monomer in initiator, cosolvent
Be prepared in the presence of neutralizer, used in cosolvent be ethylene glycol monobutyl ether, neutralizer is triethylamine, and initiator is
Cumyl hydroperoxide.Wherein, the epoxy resin refers to that epoxide number is the E03 of 0.025-0.045, and wherein epoxy resin accounts for solid
The 25-35% of body total weight；Fatty acid refers to the mixture of palmitoleic acid and linolenic acid, and mixing ratio is 1 ﹕ 1, content of fatty acid
Account for the 1-5% of total weight of solids；Acrylic ester monomer accounts for the 50-70% of total weight of solids, wherein functional acrylated phosphate
Monomer accounts for 10-20%, and the acid value of resin is controlled in 15-20mgKOH/g.The solidification total weight refers to after removing water, cosolvent
Solid content.
Preparation method includes the following steps for oxidation drying type ring oxygen phosphate resins of the present invention: cosolvent and
Reaction kettle is added in epoxy resin E03, is warming up to dissolution, stirs, while fatty acid being added into reaction kettle, is warming up to 200-240
DEG C carry out fatty acid-epoxy ring opening reaction, until the acid value of reactant be 4-8 mgKOH/g；Then temperature of reaction kettle is cooled to
150-180 DEG C, the mixture and initiator of acrylic ester monomer is slowly added dropwise, time for adding is controlled at 2.5-3.5 hours, protected
Temperature 2 hours；It is finally cooled to 90-100 DEG C, it is 8.0-10.0 that neutralizer, which is added, and is neutralized to pH value, and then quantitative hot water exists
Reaction kettle is slowly dropped under 1500 revs/min of revolving speed, emulsion dispersion obtains the epoxy phosphorus modified containing acrylated phosphate
The acid value of acid ester resin aqueous dispersion, resin is controlled in 15-20mgKOH/g, Gu containing being 40-45%.
Pigment and filler of the present invention refer to iron black, carbon black N330 and silicon powder C499；The functional antirust
Pigment refers to the mixture of trbasic zinc phosphate ZP30 Yu organic heterocyclic molecule LD-4, and mixed proportion is 2-4 ﹕ 1.
Functionality promotor of the present invention refers to containing double amino, alkyl functionalized aqueous oligosiloxane
HYDROSIL2909 is controllable siloxane oligomer, in water can stable dispersion and storage, the double amino contained in structure
Exchange can be carried out with epoxy phosphide resin at low temperature to react, and the alkyl functional group of the other end is conducive to improve auxiliary agent in structure
With the compatibility of resin, increase storage stability of the functional promotor in paint.
The preparation process of above-mentioned anticorrosive paint, including following step are poly-:
(1) 600-1000r/min low speed in agitator is added in oxidation drying type epoxy phosphate ester to disperse, is then put into
Pigment, filler and functional rust resisting pigment are then transferred to then with the revolving speed moderate-speed mixer of 1500-2000r/min 30 minutes
It is ground to fineness in sand mill less than 20 microns, notices that control temperature is lower than 45 degree in the process.
(2) auxiliary agent is added in step 1 under agitation, 1500-2000r/min Rate Dispersion 20-30 minutes,
It is cooled to room temperature, is then filtered with 200 mesh filter screens.
The invention has the following advantages over the prior art:
Aqueous film low-temperature setting poor corrosion resistance, still it is in the workpiece surface handled through ferric solid-acid, corrosion resistance
It is worse.Meanwhile compared with solvent-based two-component epoxy coating, polyurethane coating, its offline drying property of aqueous one-component coating is poor,
Surface is easy to stick, influences flow line production, selects the acrylic system of quick-dry type, and on the one hand its corrosion resistance is insufficient, on the other hand,
It is unfavorable for the surface effect of disc type electrostatic spraying since paint surface drying is too fast.And the present invention passes through oxidation drying type ring oxygen phosphorus
Acid ester resin introduces bound phosphate groups, acrylate structural, unsaturated fat ester structure on macromolecule epoxy main chains,
The Water-borne modification for solving the problems, such as macromolecule epoxy resin solves the problems, such as water-base epoxy ester resin drying property difference and corrosion resistance.Together
When, functional Urotropinum YDROSIL2909 is introduced in coating, using the double amino structures and alkyl structure contained in auxiliary agent,
Increase stability of the aqueous oligosiloxane in water paint, using the high reaction activity of double amino, effectively promotes aqueous tree
The crosslink density and rate of drying of rouge solve the problems, such as aqueous one-component coating in the corrosion resistance on ferric solid-acid processing surface.
Specific embodiment
A part of specific embodiment is set forth below, and the present invention will be described, it is necessary to which indicated herein is real in detail below
It applies example and is served only for that the invention will be further described, do not represent limiting the scope of the invention.Other people are according to the present invention
The some nonessential modifications and adjustment made still fall within protection scope of the present invention.
The preparation method of oxidation drying type ring oxygen phosphate resins in embodiment 1 ~ 5: co-solvent ethylene gylcol monobutyl ether
Reaction kettle is added with epoxy resin E03, is warming up to 160 ± 5 DEG C of dissolutions, is stirred at low speed with 600 revs/min of speed, it is then past
Fatty acid is added in reaction kettle, which is warming up to 200- by palmitoleic acid and the linolenic acid combination of 1:1 in mass ratio
240 DEG C of progress fatty acid-epoxy ring opening reactions, until the acid value of reactant is 4-8 mgKOH/g；Then temperature of reaction kettle is cooling
To 150-180 DEG C, the mixture and cumyl hydroperoxide initiator of acrylic ester monomer, time for adding control is slowly added dropwise
At 2.5-3.5 hours, 2 hours are kept the temperature；It is finally cooled to 90-100 DEG C, it is 8.0- that neutralizer triethylamine, which is added, and is neutralized to pH value
10.0, quantitative hot water is then slowly dropped to reaction kettle under 1500 revs/min of revolving speed, emulsion dispersion is contained
The acid value of the modified epoxy phosphate ester resin water dispersion of acrylated phosphate, resin is controlled in 15-20mgKOH/g, Gu containing being
40-45%。
After the water-based anticorrosive paint of above-described embodiment 1-5 is diluted with deionized water, using disc type electrostatic gun, spraying
In surface by oil removing, derusting and ferric solid-acid processing steel type round tube part, condition of cure be 80 degree 30 minutes.Construction site ring
Border humidity 50-80%, temperature 0-45 degree.Workpiece surface temperature reaches 35-45 degree before steel type round tube part coating.Disc type electrostatic
The disk diameter of rifle is 12 centimetres, and spray distance is 1.4 meters, and disc rotation speed turns for 20000-30000, electrostatic high-pressure 50-75
Kilovolt, it is desirable that for paint application viscosity at 25 DEG C, applying 2# glasss is 20-30 seconds, and paint application thixotroping value is between 2.0-2.5.Institute
The drying mode stated refers to that 80 degree are done solid work for 30 minutes, stacks and does not after-tack after offline.Spraying is disposable thick painting, i.e., thickness of dry film is big
In 50 microns.
Rear film performance is fully cured referring to table two:
By table two as it can be seen that embodiment 1-5 good combination property, can satisfy the production that truck drive shaft congratulates disc type electrostatic spraying
Demand.
Claims (6)
1. a kind of disc type electrostatic spraying technique suitable for water-based anticorrosive paint used for vehicle transmission shaft, characterized in that using circle
Steel construction piece of the disc type electrostatic gun toward surface by ferric solid-acid processing sprays water-based anticorrosive paint, then dries, wherein institute
The water-based anticorrosive paint stated includes the component of following weight percent:
Oxidation drying type ring oxygen phosphate resins 50~70%
Pigment and filler 5~15%
Functional rust resisting pigment 5~15%
Functional promotor 1~2%
Deionized water 10~20%；
The oxidation drying type ring oxygen phosphate resins are mainly being caused by epoxy resin, fatty acid and acrylic ester monomer
It is prepared in the presence of agent, cosolvent and neutralizer；
The epoxy resin refers to that epoxide number is the E03 of 0.025-0.045, and wherein epoxy resin accounts for the 25- of total weight of solids
35%；The fatty acid refers to the mixture of palmitoleic acid and linolenic acid, and mixing ratio is 1 ﹕ 1, and content of fatty acid accounts for total solids
The 1-5% of amount；The acrylic ester monomer accounts for the 50-70% of total weight of solids, wherein functional acrylated phosphate monomer accounts for
The acid value of 10-20%, resin are controlled in 15-20mgKOH/g；The cosolvent is ethylene glycol monobutyl ether, and neutralizer is triethylamine,
Initiator is cumyl hydroperoxide；
The functional rust resisting pigment is the combination of trbasic zinc phosphate ZP30 and organic heterocyclic molecule LD-4, and mixed proportion is 2-4 ﹕
1；
The functional promotor is to contain double amino, alkyl functionalized aqueous oligosiloxane HYDROSIL2909.
2. the disc type electrostatic spraying technique according to claim 1 suitable for water-based anticorrosive paint used for vehicle transmission shaft,
It is characterized in that the construction site ambient humidity 50-80% of coating, temperature 0-45 degree；The steel construction piece is round tube formed steel construction
Part, steel construction piece surface temperature reaches 35-45 degree before coating；The disk diameter of the disc type electrostatic gun is 12 centimetres,
Spray distance is 1.4 meters, and disc rotation speed turns for 20000-30000, and electrostatic high-pressure is 50-75 kilovolts, it is desirable that paint application viscosity
At 25 DEG C, applying 2# glasss is 20-30 seconds, and paint application thixotroping value is between 2.0-2.5；The drying mode refers to 80 degree 30
Minute does solid work；The spraying is disposable thick painting, i.e. thickness of dry film is greater than 50 microns.
3. a kind of water paint suitable for disc type electrostatic spraying technique, characterized in that the group including following weight percent
Part:
Oxidation drying type ring oxygen phosphate resins 50~70%
Pigment and filler 5~15%
Functional rust resisting pigment 5~15%
Functional promotor 1~2%
Deionized water 10~20%；
The oxidation drying type ring oxygen phosphate resins are mainly being caused by epoxy resin, fatty acid and acrylic ester monomer
It is prepared in the presence of agent, cosolvent and neutralizer；
The epoxy resin refers to that epoxide number is the E03 of 0.025-0.045, and wherein epoxy resin accounts for the 25- of total weight of solids
35%；The fatty acid refers to the mixture of palmitoleic acid and linolenic acid, and mixing ratio is 1 ﹕ 1, and content of fatty acid accounts for total solids
The 1-5% of amount；The acrylic ester monomer accounts for the 50-70% of total weight of solids, wherein functional acrylated phosphate monomer accounts for
The acid value of 10-20%, resin are controlled in 15-20mgKOH/g；The cosolvent is ethylene glycol monobutyl ether, and neutralizer is triethylamine,
Initiator is cumyl hydroperoxide；
The functional rust resisting pigment is the combination of trbasic zinc phosphate ZP30 and organic heterocyclic molecule LD-4, and mixed proportion is 2-4 ﹕
1；
The functional promotor is to contain double amino, alkyl functionalized aqueous oligosiloxane HYDROSIL2909.
4. water paint according to claim 3, characterized in that its system of the oxidation drying type ring oxygen phosphate resins
Preparation Method is warming up to dissolution, stirs the following steps are included: cosolvent and epoxy resin E03 addition reaction kettle, while past reaction
Fatty acid is added in kettle, is warming up to 200-240 DEG C of progress fatty acid-epoxy ring opening reaction, until the acid value of reactant is 4-8
mgKOH/g；Then temperature of reaction kettle is cooled to 150-180 DEG C, mixture and the initiation of acrylic ester monomer is slowly added dropwise
Agent, time for adding were controlled at 2.5-3.5 hours, kept the temperature 2 hours；It is finally cooled to 90-100 DEG C, neutralizer is added and is neutralized to PH
Value is 8.0-10.0, and quantitative hot water is then slowly dropped to reaction kettle under 1500 revs/min of revolving speed, emulsion dispersion,
The epoxy phosphate ester resin water dispersion modified containing acrylated phosphate is obtained, the acid value of resin is controlled in 15-20mgKOH/
G, Gu containing being 40-45%.
5. water paint according to claim 3, characterized in that the pigment and filler be iron black, carbon black N330 and
Silicon powder C499.
6. the preparation process of the described in any item water paints of claim 3-5, characterized in that poly- including following step:
(1) oxidation drying type epoxy phosphate ester be added agitator in 600-1000r/min low speed disperse, then put into pigment,
Filler and functional rust resisting pigment are then transferred to sand milling then with the revolving speed moderate-speed mixer of 1500-2000r/min 30 minutes
Fineness is ground in machine less than 20 microns, temperature is lower than 45 degree in control grinding；
(2) auxiliary agent is added in step (1) under agitation, it is 1500-2000r/min Rate Dispersion 20-30 minutes, cold
But it to room temperature, then filters.
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| CN108410310B (en) * | 2018-03-27 | 2020-02-21 | 湖南智涂环保科技有限公司 | Coating film forming material and preparation method and application thereof |
| CN108816703A (en) * | 2018-07-02 | 2018-11-16 | 苏州康乐兴电子有限公司 | A kind of not viscous treatment process of shaft forgings surface anticorrosion |
| CN109453979A (en) * | 2018-12-26 | 2019-03-12 | 安庆安簧汽车零部件有限公司 | A kind of water paint coating process suitable for leaf springs of car |
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