CN106634478A - Special high-weatherability coating for electrostatic spraying - Google Patents
Special high-weatherability coating for electrostatic spraying Download PDFInfo
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- CN106634478A CN106634478A CN201611046241.5A CN201611046241A CN106634478A CN 106634478 A CN106634478 A CN 106634478A CN 201611046241 A CN201611046241 A CN 201611046241A CN 106634478 A CN106634478 A CN 106634478A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- 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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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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
- 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
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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
- C08K2201/011—Nanostructured additives
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a special high-weatherability coating for electrostatic spraying. The coating is prepared from the raw materials in parts by weight as follows: 55-75 parts of polyester resin, 15-25 parts of epoxy resin, 5-10 parts of organosilicone resin, 2-8 parts of conductive filler, 1-3 parts of graphite powder, 1-3 parts of nano-titanium nitride, 1-5 parts of silica, 3-12 parts of titanium dioxide, 5-15 parts of precipitated barium sulfate, 5-10 parts of bentonite, 2-6 parts of mica powder, 1-5 parts of talc powder, 1-3 parts of brucite, 0.1-1 part of a coupling agent, 5-10 parts of styrene-acrylic emulsion, 2-10 parts of a solvent, 1-5 parts of an adhesion promoter, 2-5 parts of a leveling agent, 1-3 parts of a dispersant, 3-6 parts of a curing agent and 5-25 parts of diluent. The coating has the characteristics that the formula is simple, the electrostatic spraying effect is good, and the weather resistance, the adhesive force, the flexibility and the hardness are very excellent.
Description
Technical field
The present invention relates to technical field of coatings, more particularly to a kind of high durable type electrostatic spraying special coating.
Background technology
Environmental requirement and the continuous improvement of consciousness so that highly energy-consuming, the traditional handicraft of low-energy-efficiency are progressively eliminated, emerging work
Skill and facility obtain continuous popularization and application.Electrostatic spraying overcomes traditional aerial spraying and airless spraying Air Contamination
Seriously, utilization efficiency of coatings is low, comprehensive application to complex part has obvious dead angle, coating efficiency is relatively low, secondary cleaning
Relatively costly the shortcomings of, good application is arrived in extensive industrial circle.The principle of electrostatic spraying is by special equipment
High-pressure electrostatic is produced, makes to form an electric field between shower nozzle and workpiece, charged drop is attached to the surface of workpiece, Jing by electric field action
Heating, powder melts solidification (or plasticizing) film uniformly, continuous, smooth, smooth.
Affect the factor of film performance except relevant with spraying parameter in electrostatic painting process, also have with coating characteristic
Close, therefore, the selection of paint ingredient is also most important.The organic coating of the substrate surface that traditional Jing electrostatic painting process is formed
Easily decomposed aging by action of ultraviolet radiation outdoor, and organic coating be difficult possess weather-resistant, adhesive force completely
By force, the performance such as hardness height, stable gloss, solvent resistance and high-weatherability, especially weather resistance is poor.The solvent for using at present
The weather resistance of type fluorocarbon coating is preferable, but it can discharge during production or use and environment and human body are harmful to
Organic volatile, causes problem of environmental pollution, and at present resin used by F-C paint relies primarily on import, and price is high.
The content of the invention
Based on problem present in background technology, the present invention provides a kind of high durable type electrostatic spraying special coating, the painting
Material has that formula is simple, electrostatic spraying effect is good, and the characteristics of weatherability, adhesive force, pliability and very excellent hardness.
The present invention proposes a kind of high durable type electrostatic spraying special coating, and its raw material includes by weight：Polyester resin 55-
75 parts, epoxy resin 15-25 parts, organic siliconresin 5-10 parts, conductive filler 2-8 parts, graphite powder 1-3 parts, Nano titanium nitride 1-3
Part, white carbon 1-5 parts, titanium dioxide 3-12 parts, blanc fixe 5-15 parts, bentonite 5-10 parts, mica powder 2-6 parts, Pulvis Talci
1-5 parts, shepardite 1-3 parts, coupling agent 0.1-1 parts, styrene-acrylic emulsion 5-10 parts, solvent 2-10 parts, adhesion promoter 1-5 parts,
Levelling agent 2-5 parts, dispersant 1-3 parts, firming agent 3-6 parts, diluent 5-25 parts.
Preferably, the polyester resin is by the way that weight is compared into 1-1.1:0.13-0.16:0.9-0.95:0.12-0.15:
0.006-0.008:0.1-0.15:The neopentyl glycol of 0.001-0.005, M-phthalic acid, p-phthalic acid, Isosorbide-5-Nitrae-hexamethylene two
Methanol, trimethylolpropane, adipic acid and catalyst are added in reactor, are passed through nitrogen, are incubated after being warming up to 240-250 DEG C anti-
Should become clear to solution, add trimellitic anhydride as end-capping reagent, vacuum polycondensation after being cooled to 210-220 DEG C adds antioxidant
It is uniformly mixed so as to obtain；Preferably, the polyester resin is the polyester resin that acid number is 65-135mgKOH/g, it is highly preferred that the catalysis
Agent is one or more the combination in butyl titanate, tetraisopropyl titanate or stannous octoate, and the antioxidant is antioxygen
Agent 168.
Preferably, the conductive filler is obtained by the way that conducting metal oxide is coated on into attapulgite's surface.
Preferably, preparing the method for the conductive filler includes：Volume ratio is added to be 1 after attapulgite is pulverized:
In the concentrated sulphuric acid of 1-3 and the mixed acid solution of concentrated hydrochloric acid, supersound process 1-3h at 20-40 DEG C, then stir in 60-80 DEG C of water-bath
Reaction 1-3h is mixed, room temperature is cooled to, sucking filtration, washing, drying obtains activating attapulgite；Add in the activation attapulgite
Water stirs, and adds hydrochloric acid or sodium hydroxide to adjust pH to 2-11, adds conducting metal chloride, ultrasonic hydrolysis reaction
1-6h, centrifugation, washing, drying obtains the conductive filler, wherein the muriatic consumption of the conducting metal is attapulgite
5-35wt%.
Preferably, the white carbon is precipitated silica, aerosil, superfine silicon dioxide gel, aeroge
In one or more combination, preferably precipitated silica and/or aerosil.
Preferably, the firming agent is tri epoxy propyl isocyanurate or hydroxyalkyl amide.
Preferably, the adhesion promoter is in phosphate ester polyester polymers, phosphoester acrylic ester polymer
Kind or two kinds of combination；Preferably, the levelling agent is that organic silicon modified by polyether oxygen alkane solution, alkyl-modified organosiloxane are molten
The combination of one or more in liquid, acrylate copolymer solution, silicone ethylene glycol copolymerization liquid solution；Preferably, described point
Powder be polyacrylate, polystyrene/maleic acid salt, one kind of polyisobutylene/maleate apoplexy due to endogenous wind or
Various combinations.
Preferably, the solvent is the combination of one or more in styrene, propylene glycol methyl ether acetate, dimethylbenzene.
Preferably, the diluent is the combination of one or more in DAA, low-carbon (LC) alcohols, ketone.
A kind of high durable type electrostatic spraying special coating proposed by the present invention, using particular types polyhydric alcohol and polyprotic acid
In preparing polyester resin, by controlling the reactivity of polyester resin, viscosity and acidity so that polyester resin and epoxy resin,
When organic siliconresin is collectively as resin binder, there is the fine compatibility firming agent with suitable reactions again with resin being aided with
Under conditions of, obtain that there is well balanced system between bin stability, meltbility, mobility and curable, so as to
A kind of low-temperature setting is obtained, good mechanical property, weatherability is strong, and adhesive force is high, the special coating of stable storing；Additionally, above-mentioned
Resin binder introduces abundant ester bond, siliconoxygen bond and substantial amounts of carboxyl, hydroxyl and epoxide group in selecting to go back film, wherein
Ester bond can cause film to have excellent pliability, and ester bond, hydroxyl and epoxide group can then cause film adhesive excellent
It is different, simultaneous hydroxyl and siloxy, after film-forming, the weather resistance for film provides support, therefore, in the present invention
It is that a kind of basis with superperformance coating is obtained in the present invention with regard to resin, the selection of curing system；Specifically, this
In order to increase the reactivity of polyester resin in bright, by the degree of branching for increasing resin system, many officials are introduced in resin structure
Thus neopentyl glycol, 1,4-CHDM, the trimethylolpropane that can be rolled into a ball make as the source of polyhydric alcohol in polycondensation reaction
The end carboxyl-reactive of the polyester resin that must synthesize is remarkably reinforced, even if also can solidify under conditions of low temperature, while by adding
Enter M-phthalic acid, p-phthalic acid and adipic acid as the reactivity to improve polyester resin of polyprotic acid, improve
The pliability of polyester resin, mechanical energy and weatherability；Further, in order that coating of the present invention is applied to electrostatic spraying,
Add conductive filler and graphite powder as conductive agent in the coating, wherein conductive filler is adopted and coats conducting metal oxide
Formed in attapulgite's surface, thus substantially increase dispersion stabilization of the conducting metal oxide in coating, be conducive to sending out
While waving electric conductivity, it is ensured that product reduces as far as possible the usage amount of conductive agent in the case where electrostatic spraying requirement is met, to improve
The pigment decoration performance and reduction production cost of product；And conductive filler selects metal-oxide cladding attapulgite to be formed,
It is weather-proof such that it is able to obtain because metal-oxide can form cross-linked structure with the carboxyl of the polyester resin of high acid value in coating
The excellent film of excellent performance and hardness；Further, on the one hand the Nano titanium nitride for adding in the present invention can lift coating attachment
The mechanical property of the aspects such as power, shock resistance, pliability, on the other hand can also improve ageing-resistant, the corrosion-resistant and anti-spoke of coating
Penetrate performance；White carbon, titanium dioxide, blanc fixe, bentonite etc. can significantly improve the mechanical property of film as supporting material
Energy；Levelling agent, dispersant are improved then can the smooth degree of film；Styrene-acrylic emulsion then can be further as plasticizer
The performances such as the flowing of high coating.
Summary, the improvement of heretofore described coating including resin binder itself, the reasonable selection of firming agent, and
The modified three of conductive agent combines, and has obtained between weatherability, adhesive force, pliability, hardness and curable with good
The system of balance, to obtain a kind of good weatherability, mechanical performance is strong, and film layer is smooth, and adhesive force is strong, and stable storing is especially fitted
For the special coating of electrostatic spraying.
Specific embodiment
For the present invention is better described, technical scheme is readily appreciated, the present invention's is typical but non-limiting
Embodiment is as follows：
Embodiment 1
A kind of high durable type electrostatic spraying special coating, its raw material includes by weight：55 parts of polyester resin, epoxy resin
25 parts, 5 parts of organic siliconresin, 8 parts of conductive filler, 1 part of graphite powder, 3 parts of Nano titanium nitride, 1 part of precipitated silica, titanium dioxide
12 parts, 5 parts of blanc fixe, 10 parts of bentonite, 2 parts of mica powder, 5 parts of Pulvis Talci, 1 part of shepardite, 1 part of coupling agent, phenylpropyl alcohol breast
5 parts of liquid, 10 parts of styrene, 1 part of phosphate ester polyester polymers, 5 parts of organic silicon modified by polyether oxygen alkane solution, polyacrylate 1
Part, 6 parts of tri epoxy propyl isocyanurate, 5 parts of DAA.
Embodiment 2
A kind of high durable type electrostatic spraying special coating, its raw material includes by weight：75 parts of polyester resin, epoxy resin
15 parts, 10 parts of organic siliconresin, 2 parts of conductive filler, 3 parts of graphite powder, 1 part of Nano titanium nitride, 5 parts of aerosil, titanium white
3 parts of powder, 15 parts of blanc fixe, 5 parts of bentonite, 6 parts of mica powder, 1 part of Pulvis Talci, 3 parts of shepardite, 0.1 part of coupling agent, phenylpropyl alcohol
10 parts of emulsion, 2 parts of propylene glycol methyl ether acetate, 5 parts of phosphoester acrylic ester polymer, alkyl-modified organosiloxane solution 2
Part, polystyrene/3 parts of maleic acid salt, 3 parts of hydroxyalkyl amide, 25 parts of low-carbon (LC) alcohols；
The polyester resin is by the way that weight is compared into 1:0.16:0.9:0.15:0.006:0.15:0.001 neopentyl glycol,
M-phthalic acid, p-phthalic acid, 1,4-CHDM, trimethylolpropane, adipic acid and butyl titanate add anti-
In answering device, nitrogen is passed through, insulation reaction to solution becomes clear after being warming up to 250 DEG C, adds trimellitic anhydride as end-capping reagent, cooling
The vacuum polycondensation to after 210 DEG C, adds irgasfos 168 and is uniformly mixed so as to obtain the polyester resin that acid number is 65mgKOH/g；
The conductive filler is obtained by the way that conducting metal oxide is coated on into attapulgite's surface, its preparation method bag
Include：Volume ratio is added to be 1 after attapulgite is pulverized:In 1 concentrated sulphuric acid and the mixed acid solution of concentrated hydrochloric acid, at 40 DEG C
Supersound process 1h, then in 80 DEG C of stirred in water bath reaction 1h, room temperature is cooled to, sucking filtration, washing, drying obtains activating attapulgite
Soil；Add water in the activation attapulgite and stir, add hydrochloric acid or sodium hydroxide to adjust pH to 11, add conduction
Metal chloride, ultrasonic hydrolysis reaction 1h, centrifugation, washing, drying obtains the conductive filler, wherein the conducting metal chlorine
The consumption of compound is the 35wt% of attapulgite.
Embodiment 3
A kind of high durable type electrostatic spraying special coating, its raw material includes by weight：65 parts of polyester resin, epoxy resin
20 parts, it is 7 parts of organic siliconresin, 5 parts of conductive filler, 2 parts of graphite powder, 2 parts of Nano titanium nitride, 3 parts of white carbon, 8 parts of titanium dioxide, heavy
10 parts of shallow lake barium sulfate, 7 parts of bentonite, 4 parts of mica powder, 3 parts of Pulvis Talci, 2 parts of shepardite, 0.5 part of coupling agent, 8 parts of styrene-acrylic emulsion,
6 parts of dimethylbenzene, 3 parts of adhesion promoter, 4 parts of levelling agent, polyisobutylene/2 parts of maleic acid salt, three glycidyl isocyanides
5 parts of urea acid esters, 15 parts of diluent；
The polyester resin is by the way that weight is compared into 1.1:0.13:0.95:0.12:0.008:0.1:New the penta 2 of 0.005
Alcohol, M-phthalic acid, p-phthalic acid, 1,4-CHDM, trimethylolpropane, adipic acid and tetraisopropyl titanate add
In entering reactor, nitrogen is passed through, insulation reaction to solution becomes clear after being warming up to 240 DEG C, adds trimellitic anhydride as end-capping reagent,
Vacuum polycondensation after being cooled to 220 DEG C, adds irgasfos 168 and is uniformly mixed so as to obtain, and it is 135mgKOH/g that the polyester resin is acid number
Polyester resin；
The conductive filler is obtained by the way that conducting metal oxide is coated on into attapulgite's surface, its preparation method bag
Include：Volume ratio is added to be 1 after attapulgite is pulverized:In 3 concentrated sulphuric acid and the mixed acid solution of concentrated hydrochloric acid, at 20 DEG C
Supersound process 3h, then in 60 DEG C of stirred in water bath reaction 3h, room temperature is cooled to, sucking filtration, washing, drying obtains activating attapulgite
Soil；Add water in the activation attapulgite and stir, add hydrochloric acid or sodium hydroxide to adjust pH to 2, add conduction
Metal chloride, ultrasonic hydrolysis reaction 6h, centrifugation, washing, drying obtains the conductive filler, wherein the conducting metal chlorine
The consumption of compound is the 5wt% of attapulgite；
The white carbon is precipitated silica and aerosil；The adhesion promoter is poly- for phosphate ester polyester
Compound and phosphoester acrylic ester polymer；The levelling agent is that acrylate copolymer solution and silicone ethylene glycol copolymer are molten
Liquid；The diluent is DAA and ketone.
Embodiment 4
A kind of high durable type electrostatic spraying special coating, its raw material includes by weight：60 parts of polyester resin, epoxy resin
22 parts, 8 parts of organic siliconresin, 4 parts of conductive filler, 1.5 parts of graphite powder, 2.5 parts of Nano titanium nitride, 4 parts of white carbon, titanium dioxide 7
Part, 8 parts of blanc fixe, 8 parts of bentonite, 3 parts of mica powder, 4 parts of Pulvis Talci, 2.5 parts of shepardite, 0.6 part of coupling agent, phenylpropyl alcohol breast
It is 7 parts of liquid, 5 parts of solvent, 2 parts of phosphoester acrylic ester polymer, 3 parts of levelling agent, 2.5 parts of dispersant, 4 parts of hydroxyalkyl amide, dilute
Release 10 parts of agent；
The polyester resin is by the way that weight is compared into 1.05:0.14:0.93:0.14:0.007:0.13:New the penta of 0.003
Glycol, M-phthalic acid, p-phthalic acid, 1,4-CHDM, trimethylolpropane, adipic acid and stannous octoate are added
In reactor, nitrogen is passed through, insulation reaction to solution becomes clear after being warming up to 245 DEG C, adds trimellitic anhydride as end-capping reagent, drop
Temperature adds irgasfos 168 and is uniformly mixed so as to obtain to vacuum polycondensation after 215 DEG C, and it is 100mgKOH/g that the polyester resin is acid number
Polyester resin；
The conductive filler is obtained by the way that conducting metal oxide is coated on into attapulgite's surface, its preparation method bag
Include：Volume ratio is added to be 1 after attapulgite is pulverized:In 2 concentrated sulphuric acid and the mixed acid solution of concentrated hydrochloric acid, at 30 DEG C
Supersound process 2h, then in 70 DEG C of stirred in water bath reaction 2h, room temperature is cooled to, sucking filtration, washing, drying obtains activating attapulgite
Soil；Add water in the activation attapulgite and stir, add hydrochloric acid or sodium hydroxide to adjust pH to 7, add conduction
Metal chloride, ultrasonic hydrolysis reaction 5h, centrifugation, washing, drying obtains the conductive filler, wherein the conducting metal chlorine
The consumption of compound is the 20wt% of attapulgite；
The white carbon is, superfine silicon dioxide gel and aeroge；The levelling agent is acrylate copolymer solution
With silicone ethylene glycol copolymerization liquid solution；The dispersant is polyacrylate and polyisobutylene/maleic acid salt；It is described
Solvent is styrene, propylene glycol methyl ether acetate and dimethylbenzene；The diluent is DAA and low-carbon (LC) alcohols.
Coating in embodiment 1-4 is sprayed on the model of Jing degreasing and rust removals in the way of electrostatic spraying, is carried out as follows
Performance test, the performance test results are as shown in the table.
A kind of high durable type electrostatic spraying special coating proposed by the present invention, using particular types polyhydric alcohol and polyprotic acid
In preparing polyester resin, by controlling the reactivity of polyester resin, viscosity and acidity so that polyester resin and epoxy resin,
When organic siliconresin is collectively as resin binder, there is the fine compatibility firming agent with suitable reactions again with resin being aided with
Under conditions of, obtain that there is well balanced system between bin stability, meltbility, mobility and curable, so as to
A kind of low-temperature setting is obtained, good mechanical property, weatherability is strong, and adhesive force is high, the special coating of stable storing；Additionally, above-mentioned
Resin binder introduces abundant ester bond, siliconoxygen bond and substantial amounts of carboxyl, hydroxyl and epoxide group in selecting to go back film, wherein
Ester bond can cause film to have excellent pliability, and ester bond, hydroxyl and epoxide group can then cause film adhesive excellent
It is different, simultaneous hydroxyl and siloxy, after film-forming, the weather resistance for film provides support, therefore, in the present invention
It is that a kind of basis with superperformance coating is obtained in the present invention with regard to resin, the selection of curing system；Specifically, this
In order to increase the reactivity of polyester resin in bright, by the degree of branching for increasing resin system, many officials are introduced in resin structure
Thus neopentyl glycol, 1,4-CHDM, the trimethylolpropane that can be rolled into a ball make as the source of polyhydric alcohol in polycondensation reaction
The end carboxyl-reactive of the polyester resin that must synthesize is remarkably reinforced, even if also can solidify under conditions of low temperature, while by adding
Enter M-phthalic acid, p-phthalic acid and adipic acid as the reactivity to improve polyester resin of polyprotic acid, improve
The pliability of polyester resin, mechanical energy and weatherability；Further, in order that coating of the present invention is applied to electrostatic spraying,
Add conductive filler and graphite powder as conductive agent in the coating, wherein conductive filler is adopted and coats conducting metal oxide
Formed in attapulgite's surface, thus substantially increase dispersion stabilization of the conducting metal oxide in coating, be conducive to sending out
While waving electric conductivity, it is ensured that product reduces as far as possible the usage amount of conductive agent in the case where electrostatic spraying requirement is met, to improve
The pigment decoration performance and reduction production cost of product；And conductive filler selects metal-oxide cladding attapulgite to be formed,
It is weather-proof such that it is able to obtain because metal-oxide can form cross-linked structure with the carboxyl of the polyester resin of high acid value in coating
The excellent film of excellent performance and hardness；Further, on the one hand the Nano titanium nitride for adding in the present invention can lift coating attachment
The mechanical property of the aspects such as power, shock resistance, pliability, on the other hand can also improve ageing-resistant, the corrosion-resistant and anti-spoke of coating
Penetrate performance；White carbon, titanium dioxide, blanc fixe, bentonite etc. can significantly improve the mechanical property of film as supporting material
Energy；Levelling agent, dispersant are improved then can the smooth degree of film；Styrene-acrylic emulsion then can be further as plasticizer
The performances such as the flowing of high coating.
Summary, the improvement of heretofore described coating including resin binder itself, the reasonable selection of firming agent, and
The modified three of conductive agent combines, and has obtained between weatherability, adhesive force, pliability, hardness and curable with good
The system of balance, to obtain a kind of good weatherability, mechanical performance is strong, and film layer is smooth, and adhesive force is strong, and stable storing is especially fitted
For the special coating of electrostatic spraying.
Applicant states that the present invention illustrates the method detailed of the present invention, but the present invention not office by above-described embodiment
It is limited to above-mentioned method detailed, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implement.Art
Technical staff it will be clearly understood that any improvement in the present invention, the equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., within the scope of all falling within protection scope of the present invention and disclosure.
Claims (9)
1. a kind of high durable type electrostatic spraying special coating, it is characterised in that its raw material includes by weight：Polyester resin 55-
75 parts, epoxy resin 15-25 parts, organic siliconresin 5-10 parts, conductive filler 2-8 parts, graphite powder 1-3 parts, Nano titanium nitride 1-3
Part, white carbon 1-5 parts, titanium dioxide 3-12 parts, blanc fixe 5-15 parts, bentonite 5-10 parts, mica powder 2-6 parts, Pulvis Talci
1-5 parts, shepardite 1-3 parts, coupling agent 0.1-1 parts, styrene-acrylic emulsion 5-10 parts, solvent 2-10 parts, adhesion promoter 1-5 parts,
Levelling agent 2-5 parts, dispersant 1-3 parts, firming agent 3-6 parts, diluent 5-25 parts.
2. high durable type electrostatic spraying special coating according to claim 1, it is characterised in that the polyester resin is logical
Cross and weight is compared into 1-1.1:0.13-0.16:0.9-0.95:0.12-0.15:0.006-0.008:0.1-0.15:0.001-0.005
Neopentyl glycol, M-phthalic acid, p-phthalic acid, 1,4-CHDM, trimethylolpropane, adipic acid and catalyst
In adding reactor, nitrogen is passed through, insulation reaction to solution becomes clear after being warming up to 240-250 DEG C, adds trimellitic anhydride conduct
End-capping reagent, vacuum polycondensation after being cooled to 210-220 DEG C adds antioxidant and is uniformly mixed so as to obtain；Preferably, the polyester resin is acid
It is worth the polyester resin for 65-135mgKOH/g, it is highly preferred that the catalyst is butyl titanate, tetraisopropyl titanate or pungent
One or more combination in sour stannous, the antioxidant is irgasfos 168.
3. high durable type electrostatic spraying special coating according to claim 1 and 2, it is characterised in that the conductive filler
It is to be obtained by the way that conducting metal oxide is coated on into attapulgite's surface.
4. high durable type electrostatic spraying special coating according to claim 3, it is characterised in that prepare the conductive filler
Method include：Volume ratio is added to be 1 after attapulgite is pulverized:The concentrated sulphuric acid of 1-3 and the mixed acid solution of concentrated hydrochloric acid
In, supersound process 1-3h at 20-40 DEG C, then in 60-80 DEG C of stirred in water bath reaction 1-3h, room temperature is cooled to, sucking filtration is washed
Wash, dry, obtain activating attapulgite；Add water in the activation attapulgite and stir, add hydrochloric acid or hydroxide
Sodium adjusts pH to 2-11, adds conducting metal chloride, and ultrasonic hydrolysis reaction 1-6h, centrifugation, washing, drying obtains described
Conductive filler, wherein 5-35wt% of the muriatic consumption of the conducting metal for attapulgite.
5. the high durable type electrostatic spraying special coating according to any one of claim 1-4, it is characterised in that the Linesless charcoal
Black one or more the combination in precipitated silica, aerosil, superfine silicon dioxide gel, aeroge,
Preferably precipitated silica and/or aerosil.
6. the high durable type electrostatic spraying special coating according to any one of claim 1-5, it is characterised in that the solidification
Agent is tri epoxy propyl isocyanurate or hydroxyalkyl amide.
7. the high durable type electrostatic spraying special coating according to any one of claim 1-6, it is characterised in that the attachment
Power accelerator is one or two the combination in phosphate ester polyester polymers, phosphoester acrylic ester polymer；Preferably, institute
Levelling agent is stated for organic silicon modified by polyether oxygen alkane solution, alkyl-modified organosiloxane solution, acrylate copolymer solution, silicon
The combination of one or more in ketone ethylene glycol copolymerization liquid solution；Preferably, the dispersant is polyacrylate, polyphenyl second
The combination of one or more of alkene/maleic acid salt, polyisobutylene/maleate apoplexy due to endogenous wind.
8. the high durable type electrostatic spraying special coating according to any one of claim 1-7, it is characterised in that the solvent
For the combination of one or more in styrene, propylene glycol methyl ether acetate, dimethylbenzene.
9. the high durable type electrostatic spraying special coating according to any one of claim 1-8, it is characterised in that the dilution
Agent is the combination of one or more in DAA, low-carbon (LC) alcohols, ketone.
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| CN201611046241.5A CN106634478A (en) | 2016-11-22 | 2016-11-22 | Special high-weatherability coating for electrostatic spraying |
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| CN201611046241.5A CN106634478A (en) | 2016-11-22 | 2016-11-22 | Special high-weatherability coating for electrostatic spraying |
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| CN106634478A true CN106634478A (en) | 2017-05-10 |
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| CN201611046241.5A Pending CN106634478A (en) | 2016-11-22 | 2016-11-22 | Special high-weatherability coating for electrostatic spraying |
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| CN109181489A (en) * | 2018-09-30 | 2019-01-11 | 惠州市双信达实业有限公司 | A kind of metal surface protection epoxy primer |
| CN112266710A (en) * | 2020-09-10 | 2021-01-26 | 廊坊艾格玛新立材料科技有限公司 | Powder coating with super-weather resistance and preparation method and application thereof |
| CN113210232A (en) * | 2021-05-08 | 2021-08-06 | 杭州老板电器股份有限公司 | Impeller surface treatment method and dip-coating device |
| CN113881309A (en) * | 2021-09-18 | 2022-01-04 | 安徽华辉塑业科技股份有限公司 | Insulating powder coating |
| CN115851079A (en) * | 2022-12-20 | 2023-03-28 | 宁波雁门化工有限公司 | Corrosion-resistant coating, reaction kettle corrosion-resistant layer and reaction kettle |
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