CN109666393A - Coating and preparation method thereof - Google Patents
Coating and preparation method thereof Download PDFInfo
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- CN109666393A CN109666393A CN201811544375.9A CN201811544375A CN109666393A CN 109666393 A CN109666393 A CN 109666393A CN 201811544375 A CN201811544375 A CN 201811544375A CN 109666393 A CN109666393 A CN 109666393A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/42—Introducing metal atoms or metal-containing 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K2003/327—Aluminium phosphate
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
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- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention relates to Material Fields, in particular to a kind of coating and preparation method thereof.The preparation method of coating mainly includes the first component of preparation: the mixture for being blended with wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste is sufficiently mixed, stir the first preset time, then organosilicon modified crylic acid resin is added, stir the second preset time, neutralizer is added, third preset time is stirred；Wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste are first sufficiently mixed stirring, aqueous color paste is filled to be dispersed throughout, increase its mobility, then organosilicon modified crylic acid resin is added, organosilicon modified crylic acid resin has hydrophobicity, and the acrylic emulsion for being grafted with organosilicon radical improves the water resistance and weatherability of coating, organosilicon modified crylic acid resin and aqueous color paste reactive grafting, it is cross-linked with each other, improves the chemical crosslinking degree and hardness of paint film of paint film.
Description
Technical field
The present invention relates to Material Fields, in particular to a kind of coating and preparation method thereof.
Background technique
Coating is to be coated in the body surface protected or decorated, and can form the continuous thin of firm attachment with coated article
Film, usually based on resin or oil or lotion；Coating weather resistance in the prior art is difficult to reach requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of coating and preparation method thereof, it is intended to improve existing coating weather resistance
The problem of difference.
First aspect present invention provides a kind of preparation method of coating, and the preparation method of coating specifically includes that
It prepares the first component: being blended with wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste
Mixture in be added organosilicon modified crylic acid resin reaction preset time after add neutralizer；
Wherein, raw material is as follows according to parts by weight in the step of preparing the first component:
0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent, 10-15 parts of water, dipropylene glycol methyl ether 3-5
Part, 40-50 parts of organosilicon modified crylic acid resin, 45-50 parts of aqueous color paste, 0.1-0.2 parts of neutralizer.
Wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste are first sufficiently mixed stirring, make water
Property mill base, which fills, to be dispersed throughout, and increases its mobility, organosilicon modified crylic acid resin is then added, organosilicon-modified acrylic
Resin has hydrophobicity, and the acrylic emulsion for being grafted with organosilicon radical improves the water resistance and weatherability of coating, and organosilicon changes
Property acrylic resin and aqueous color paste reactive grafting, be cross-linked with each other, improve the chemical crosslinking degree and hardness of paint film of paint film.
Neutralizer stirring is added, adjusts the pH value of the first component, avoids the first component property unstable.
During preparing the first component, directly mixing each component will lead to organosilicon modified crylic acid resin not
Can sufficiently be wet, it is subsequent reacted with isocyanates during cause to react insufficient, grafting rate is low, and weather resistance is poor.
In some embodiments of first aspect present invention,
It include the speed stirring mixture with 500rpm-600rpm before mixture addition organosilicon modified crylic acid resin
10-15 minutes；
It further include the speed with 1000rpm-1200rpm before neutralizer is added after addition organosilicon modified crylic acid resin
Degree stirring 10-15 minutes；
It is added after neutralizer and is stirred 10-15 minutes with the speed of 500rpm-800rpm.Organic-silicon-modified propylene is being added
After acid resin, stirring rate is very fast, keeps aqueous color paste, dipropylene glycol methyl ether etc. sufficiently mixed with organosilicon modified crylic acid resin
It closes, organosilicon modified crylic acid resin is avoided to reunite in the mixture, and cause cross-linking effect bad.
In some embodiments of first aspect present invention, prepare the first component the step of before further include:
It prepares organosilicon modified crylic acid resin: aqueous acrylamide resin being heated to 50 DEG C -60 DEG C, methoxy silane is added
Coupling agent solution is stirred to react 22-25 hours at 50 DEG C -60 DEG C.
Methoxy silane coupling agent is combined with-the OH of water soluble acrylic acid, and tree is modified using the organosilicon containing-OR group
Rouge makes modified resin hydrophobic more preferably.Be stirred to react at 50 DEG C -60 DEG C make within 22-25 hours silane coupling agent sufficiently with
Group graft reaction in acrylic emulsion, while silane is hydrolyzed.
In some embodiments of first aspect present invention, prepare the first component the step of before further include:
It prepares aqueous color paste: being blended with neutralizer, dispersing agent, defoaming agent, pigment, trbasic zinc phosphate, mica powder, water, trimerization
The mixture of aluminum phosphate and barium sulfate is ground to fineness less than or equal to 15 microns；
Wherein, raw material is as follows according to parts by weight in the step of preparing aqueous color paste:
30-35 parts of water, 3-5 parts of neutralizer, 5-10 parts of dispersing agent, 1-2 parts of defoaming agent, 10-15 parts of mica powder, pigment 10-
20 parts, 10-15 parts of trbasic zinc phosphate, 5-10 parts of aluminium triphosphate, 15-10 parts of barium sulfate.
Using trbasic zinc phosphate, aluminium triphosphate and mica powder as filler, trbasic zinc phosphate is mainly mixed with dihydrate and tetrahydrate
Based on mould assembly.Since there are the crystallizations water, zinc hydroxide and phosphoric acid zinc ion are slowly generated, is formed and is protected with the complex compound of corrosiveness
Cuticula, to realize anodic protection.Aluminum phosphate is mainly aluminium dihydrogen tripolyphosphate, and tough and tensile passivation can be generated with metal compound
Film.Metal is set to reach passivation, the ionic compound of passivation interacts to prevent metal oxidation corrosion from mentioning with metal cation
High salt spray resistance.
Raw material is arranged by said ratio in the step of preparing aqueous color paste, is capable of forming uniform, continuous protective film, generates
Tough and tensile passivating film.
In some embodiments of first aspect present invention, prepare aqueous color paste step and specifically include: first by neutralizer, point
Powder, defoaming agent and water are uniformly mixed, be then added pigment, trbasic zinc phosphate, mica powder, aluminium triphosphate and barium sulfate in
It is stirred 20-30 minutes under the speed of 1000rpm-1500rpm.
First mix neutralizer, dispersing agent, defoaming agent and water, then by pigment, trbasic zinc phosphate, mica powder, aluminium triphosphate with
And the stirring of mixed liquor high speed is added in barium sulfate, and aqueous color paste can be made to form continuous film, neutralizer, dispersing agent and phosphoric acid
Zinc, mica powder, aluminium triphosphate are sufficiently mixed, and generate zinc hydroxide and trbasic zinc phosphate slowly equably, avoid trbasic zinc phosphate, mica
Powder, aluminium triphosphate are reunited.
It in some embodiments of first aspect present invention, prepares in aqueous color paste step, further includes by 3-5 parts by weight
Antirust agent is added in mixture.
Antirust agent can inhibit the mixed type antirust agent of anode reaction and cathode reaction, and the influence to corrosion electrochemistry mainly has
Insoluble matter is generated with anode reaction, these insoluble matters are closely deposited on metal surface and play corrosion inhibition, metal and corrosion
Medium separates, and metal is made to reach passivation, and the ionic compound of passivation interacts to prevent metal from aoxidizing with metal cation
Corrosion improves salt spray resistance.
In some embodiments of first aspect present invention, the preparation method of coating further include:
Prepare the second component: the mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs
Mix the 4th preset time；
Wherein, raw material is as follows according to parts by weight in the step of preparing the second component:
70-75 parts of isocyanate resin, 20-25 parts of propylene-glycol diacetate, 3-8 parts of water absorbing agent.
The mixing of propylene-glycol diacetate and isocyanate resin, water absorbing agent, dissolves isocyanate resin sufficiently, also for
It is subsequent to be sufficiently mixed isocyanate resin with other substances using first group of timesharing.
In some embodiments of first aspect present invention, the preparation method of coating further include:
The first component that the first composition step obtains will be prepared to mix with the second component that the second composition step of preparation obtains.
In some embodiments of first aspect present invention, the mass ratio that the first component is mixed with the second component is 3-5:1.
Under the proportion, the hydroxyl group in the first component can sufficiently be reacted with the isocyanates in the second component.
Second aspect of the present invention provides a kind of coating, the preparation method system for the coating that coating is provided by first aspect present invention
?.
Aqueous color paste fills be dispersed throughout after be added organosilicon modified crylic acid resin, organosilicon modified crylic acid resin tool
There is hydrophobicity, the acrylic emulsion for being grafted with organosilicon radical improves the water resistance and weatherability of coating, organic-silicon-modified propylene
Acid resin and aqueous color paste reactive grafting, are cross-linked with each other, improve the chemical crosslinking degree and hardness of paint film of paint film.The film of formation can
Metal and corrosive medium are separated, metal is made to reach passivation, ionic compound and the metal cation interaction of passivation to
Prevent metal oxidation corrosion from improving salt spray resistance.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Coating of the embodiment of the present invention and preparation method thereof is specifically described below.
The preparation method of coating specifically includes that
It prepares the first component: being blended with wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste
Mixture be sufficiently mixed, stir the first preset time, be then added organosilicon modified crylic acid resin, when stirring second is default
Between, neutralizer is added, third preset time is stirred；
Wherein, raw material is as follows according to parts by weight in the step of preparing the first component:
0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent, 10-15 parts of water, dipropylene glycol methyl ether 3-5
Part, 40-50 parts of organosilicon modified crylic acid resin, 45-50 parts of aqueous color paste, 0.1-0.2 parts of neutralizer.
In the present embodiment, wetting agent can select material appropriate, such as silicate, nitrate, sulfate, quartz, gold
Belong to oxide etc..Defoaming agent can select material appropriate, such as the fatty acid ester compounded object of silicone emulsion, higher alcohols, polyoxyethylene
Polyoxypropylene pentaerythrite ether, polyoxyethylene polyoxy propyl alcohol amidogen ether, polypropylene glycerol aether and polyoxyethylene polyoxypropylene glycerol
Ether, dimethyl silicone polymer etc..Levelling agent can select material appropriate, such as isophorone, diacetone alcohol, silicone oil, poly- diformazan
Radical siloxane etc..Neutralizer can select material appropriate, such as triethylamine (TEA), dimethylethanolamine (DMEA), diethyl second
Hydramine (DEEA), 2- amino-2-methyl propyl alcohol.Organosilicon modified crylic acid resin is by containing the active polyacrylic acid phenol tree through base
Rouge reacts manufactured a kind of modified resin with the silicone oligomer containing active antelope base (or alkoxy).Aqueous color paste has one
Fixed mobility or thixotropic fluidity, the concentration graining paste of stronger tinctorial strength.
In an embodiment of the present invention, first by wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color
Slurry is sufficiently mixed stirring, fills aqueous color paste and is dispersed throughout, increases its mobility, and organosilicon-modified acrylic tree is then added
Rouge, organosilicon modified crylic acid resin have hydrophobicity, and the acrylic emulsion for being grafted with organosilicon radical improves the water-fast of coating
Property and weatherability, organosilicon modified crylic acid resin and aqueous color paste reactive grafting, be cross-linked with each other, improve the chemical crosslinking of paint film
Degree and hardness of paint film.Neutralizer stirring is added, the pH value of the first component is adjusted, avoids the first component property unstable.
Further, raw material is as follows according to parts by weight in the step of preparing the first component:
0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent, 10-15 parts of water, dipropylene glycol methyl ether 3-5
Part, 40-50 parts of organosilicon modified crylic acid resin, 45-50 parts of aqueous color paste, 0.1-0.2 parts of neutralizer.
In the step of inventor has found after experiment, prepares the first component, only when raw material is configured according to said ratio
When, the weather resistance of final coating can be only achieved≤1 grade of 500H gloss retention >=85%, 500H colour fading (testing standard GB/
T1865)。
In other embodiments of the invention, thickener can also be added while increasing neutralizer, thickener can be with
Select material appropriate, for example, starch, gelatin, sodium alginate, casein, guar gum, chitosan, polyacrylamide, polyvinyl alcohol,
Polyvinylpyrrolidone and polyethylene glycol oxide etc., the component of thickener is depending on the consistency of final liquid.
Further, in some embodiments of the invention, it stirs in the first preset time step with 500rpm-600rpm
Speed stir 10-15 minutes；
It stirs in the second preset time step and is stirred 10-15 minutes with the speed of 1000rpm-1200rpm；
It stirs in third preset time step and is stirred 10-15 minutes with the speed of 500rpm-800rpm.
After organosilicon modified crylic acid resin is added, stirring rate is very fast, make aqueous color paste, dipropylene glycol methyl ether etc. with
Organosilicon modified crylic acid resin is sufficiently mixed, and organosilicon modified crylic acid resin is avoided to reunite in the mixture, and causes to hand over
It is bad to join effect.
Before the step of in some embodiments of the invention, preparing the first component further include:
It prepares organosilicon modified crylic acid resin: aqueous acrylamide resin being heated to 50 DEG C -60 DEG C, methoxy silane is added
Coupling agent solution is stirred to react 22-25 hours at 50 DEG C -60 DEG C.
Methoxy silane coupling agent is combined with-the OH of water soluble acrylic acid, and tree is modified using the organosilicon containing-OR group
Rouge makes modified resin hydrophobic more preferably.
Reaction mechanism are as follows: Si-OR+H-R ' → Si-O-R '+R ' OH
In detail, first methoxy silane coupling agent is mixed with water 1:1 in mass ratio, is made into spare methoxy silane coupling
Agent mixed liquor.100 parts of aqueous acrylamide resin are poured into the container of heating water bath stirring, water bath heating temperature is at 50 DEG C -60
DEG C, above-mentioned methoxy silane coupling agent is added when being slowly stirred and closes liquid, mixing speed is set in 600-800RPM, is always maintained at
24 hours, which made silane coupling agent sufficiently with the group graft reaction in acrylic emulsion, while silane is hydrolyzed.
It is understood that in other embodiments of the invention, organosilicon modified crylic acid resin can also use it
Other party method is made.
Before the step of in some embodiments of the invention, preparing the first component further include:
It prepares aqueous color paste: being blended with neutralizer, dispersing agent, defoaming agent, pigment, trbasic zinc phosphate, mica powder, water, trimerization
The mixture of aluminum phosphate and barium sulfate is ground to fineness less than or equal to 15 microns；
Wherein, raw material is as follows according to parts by weight in the step of preparing aqueous color paste:
30-35 parts of water, 3-5 parts of neutralizer, 5-10 parts of dispersing agent, 1-2 parts of defoaming agent, 10-15 parts of mica powder, pigment 10-
20 parts, 10-15 parts of trbasic zinc phosphate, 5-10 parts of aluminium triphosphate, 15-10 parts of barium sulfate.
Using trbasic zinc phosphate, aluminium triphosphate and mica powder as filler, trbasic zinc phosphate is mainly mixed with dihydrate and tetrahydrate
Based on mould assembly.Since there are the crystallizations water, zinc hydroxide and phosphoric acid zinc ion are slowly generated, is formed and is protected with the complex compound of corrosiveness
Cuticula, to realize anodic protection.Aluminum phosphate is mainly aluminium dihydrogen tripolyphosphate, and tough and tensile passivation can be generated with metal compound
Film.Metal is set to reach passivation, the ionic compound of passivation interacts to prevent metal oxidation corrosion from mentioning with metal cation
High salt spray resistance.
Raw material is arranged by said ratio in the step of preparing aqueous color paste, is capable of forming uniform, continuous protective film, generates
Tough and tensile passivating film.
In detail, in some embodiments of the invention, aqueous color paste step is prepared to specifically include: first by neutralizer, point
Powder, defoaming agent and water are uniformly mixed, be then added pigment, trbasic zinc phosphate, mica powder, aluminium triphosphate and barium sulfate in
It is stirred 20-30 minutes under the speed of 1000rpm-1500rpm.
First mix neutralizer, dispersing agent, defoaming agent and water, then by pigment, trbasic zinc phosphate, mica powder, aluminium triphosphate with
And the stirring of mixed liquor high speed is added in barium sulfate, and aqueous color paste can be made to form continuous film, neutralizer, dispersing agent and phosphoric acid
Zinc, mica powder, aluminium triphosphate are sufficiently mixed, and generate zinc hydroxide and trbasic zinc phosphate slowly equably, avoid trbasic zinc phosphate, mica
Powder, aluminium triphosphate are reunited.
Dispersing agent can be selected from material appropriate, for example, vinyl bis-stearamides, ethylene-acrylic acid copolymer, second
Alkene-acetate ethylene copolymer etc..
In some embodiments of the invention, it prepares in aqueous color paste step, further includes adding the antirust agent of 3-5 parts by weight
Enter in mixture.
Antirust agent can inhibit the mixed type antirust agent of anode reaction and cathode reaction, and the influence to corrosion electrochemistry mainly has
Insoluble matter is generated with anode reaction, these insoluble matters are closely deposited on metal surface and play corrosion inhibition, metal and corrosion
Medium separates, and metal is made to reach passivation, and the ionic compound of passivation interacts to prevent metal from aoxidizing with metal cation
Corrosion improves salt spray resistance.
In some embodiments of first aspect present invention, the preparation method of coating further include:
Prepare the second component: the mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs
Mix the 4th preset time；
Wherein, raw material is as follows according to parts by weight in the step of preparing the second component:
70-75 parts of isocyanate resin, 20-25 parts of propylene-glycol diacetate, 3-8 parts of water absorbing agent.
Water absorbing agent can be selected from material appropriate, such as water-absorbing resin.Isocyanate resin can be selected from material appropriate,
Such as toluene di-isocyanate(TDI) (TDI), isophorone diisocyanate (IPDI), methyl diphenylene diisocyanate (MDI), two
Diphenylmethane diisocyanate (HMDI), hexamethylene diisocyanate (HDI), lysine diisocyanate (LDI) etc..
The mixing of propylene-glycol diacetate and isocyanate resin, water absorbing agent, dissolves isocyanate resin sufficiently, also for
It is subsequent to be sufficiently mixed isocyanate resin with other substances using first group of timesharing.
In detail, in the present embodiment, first propylene-glycol diacetate is added in the container of stirring, then mixes slowly and adds
Enter water absorbing agent, mixing speed is that 300rpm-500rpm. mixing time is 5-10 minutes, and polyisocyanate cyanogen is added at a slow speed after mixing evenly
Acid ester resin, mixing speed 300-500rpm, mixing time are to obtain the second component in 20 minutes.
In some embodiments of first aspect present invention, the preparation method of coating further include:
The first component that the first composition step obtains will be prepared to mix with the second component that the second composition step of preparation obtains.
Isocyanate groups in the hydroxyl group and the second component in film-forming resin in first component generate chemistry and hand over
Connection, forms the film forming matter of reticular structure, improves the compactness of paint film.- NCO is reacted with the hydroxyl in resin generates amino first
Acid esters, ammonia ester bond can also continue to react with-NCO, generate allophanate.
It should be noted that in other embodiments of the invention, the step of the first component is mixed with the second component, can be with
It carries out again before the paint is to be applied.
In some embodiments of first aspect present invention, the mass ratio that the first component is mixed with the second component is 3-5:1.
Under the proportion, the hydroxyl group in the first component can sufficiently be reacted with the isocyanates in the second component.
Second aspect of the present invention provides a kind of coating, the preparation method system for the coating that coating is provided by first aspect present invention
?.
The aqueous color paste of first component fills be dispersed throughout after be added organosilicon modified crylic acid resin, organic-silicon-modified third
Olefin(e) acid resin has hydrophobicity, and the acrylic emulsion for being grafted with organosilicon radical improves the water resistance and weatherability of coating, organic
Fluorine-silicon modified acrylic resin and aqueous color paste reactive grafting, are cross-linked with each other, improve the chemical crosslinking degree and hardness of paint film of paint film.Shape
At film metal and corrosive medium can be separated, so that metal is reached passivation, ionic compound and the metal cation phase of passivation
Interaction is to prevent metal oxidation corrosion from improving salt spray resistance.
Coating organosiloxane provided by the invention is combined with-the OH of water soluble acrylic acid, using organic containing-OR group
Silicon carrys out modified resin, makes modified resin hydrophobic more preferably.Use organosilicon modified crylic acid resin as film forming matter, with phosphorus
Sour zinc, aluminum phosphate and mica powder are as antirust filler, and anodic protection is realized in interaction between each component, increase weatherability.
Feature and performance of the invention are described in further detail with reference to embodiments.
In the embodiment of the present invention 1- embodiment 5:
Wetting agent uses polyether-modified dimethyl siloxane, and defoaming agent uses hydrophobic particles and polysiloxane composition, stream
Flat agent uses modified polyorganosiloxane, and neutralizer uses dimethylethanolamine, and dispersing agent uses vinyl bis-stearamides, and pigment is adopted
Use carbon black.The model FA-179 of antirust agent, is purchased from Shanghai chemical plant.
In other embodiments of the invention, wetting agent, defoaming agent, levelling agent, dispersing agent, neutralizer, pigment can also be with
Using other materials, final coating also can have preferable weatherability；Correspondingly, above-mentioned antirust agent can also use it
The antirust agent of his model.
Embodiment 1
The present embodiment provides a kind of coating, which is mainly made by following steps:
It prepares organosilicon modified crylic acid resin: 100 parts by weight aqueous acrylamide resins being heated to 50 DEG C, 10 weight are added
The methoxy silane coupling agent solution of part 50wt%, the speed at 50 DEG C with 600rpm are stirred to react 25 hours.
Prepare aqueous color paste
It stocks up by weight: 30 parts of water, 3 parts of antirust agent, 3 parts of neutralizer, 5 parts of dispersing agent, 1 part of defoaming agent, mica powder 10
Part, 10 parts of pigment, 10 parts of trbasic zinc phosphate, 5 parts of aluminium triphosphate, 15 parts of barium sulfate.
First neutralizer, dispersing agent, antirust agent, defoaming agent and water are uniformly mixed, pigment, trbasic zinc phosphate, cloud is then added
Female powder, aluminium triphosphate and barium sulfate stir 20 minutes to fineness less than or equal to 15 microns under the speed of 1000rpm.
Prepare the first component
It stocks up by weight: 0.5 part of wetting agent, 0.5 part of defoaming agent, 0.5 part of levelling agent, 10 parts of water, dipropylene glycol methyl ether 3
Part, 40 parts of organosilicon modified crylic acid resin, 45 parts of aqueous color paste, 0.1 part of neutralizer.
Mix wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste, after being sufficiently mixed with
The speed of 500rpm stirs 15 minutes, and organosilicon modified crylic acid resin is then added, and stirs 10 points with the speed of 1000rpm
Clock；Again plus neutralizer, it is stirred 10 minutes with the speed of 500rpm.
Prepare the second component
It stocks up by weight: 70 parts of isocyanate resin, 20 parts of propylene-glycol diacetate, 3 parts of water absorbing agent.
The mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs 25 minutes.
It is that 3:1 mixes the first component and the second component with mass ratio.
The coating obtained to embodiment 1 detects, and ground is provided to carry out by GB/T1727, removes the greasy dirt on surface, floats
Rust and dust.
The viscosity of suitable spraying or roller coating is diluted to the deionized water for the coating addition proper proportion that embodiment 1 obtains.
Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 1.
The coating property test that 1 embodiment 1 of table provides
From the results shown in Table 1: each performance test of coating that embodiment 1 provides is up to standard, weatherability, salt spray resistance
Property, salt water resistance etc. are up to standard.
Embodiment 2
The present embodiment provides a kind of coating, which is mainly made by following steps:
It prepares organosilicon modified crylic acid resin: 110 parts by weight aqueous acrylamide resins being heated to 60 DEG C, 10 weight are added
The methoxy silane coupling agent solution of part 45wt%, the speed at 60 DEG C with 800rpm are stirred to react 25 hours.
Prepare aqueous color paste
It stocks up by weight: 35 parts of water, 5 parts of antirust agent, 5 parts of neutralizer, 10 parts of dispersing agent, 2 parts of defoaming agent, mica powder 15
Part, 20 parts of pigment, 15 parts of trbasic zinc phosphate, 10 parts of aluminium triphosphate, 10 parts of barium sulfate.
First neutralizer, dispersing agent, antirust agent, defoaming agent and water are uniformly mixed, pigment, trbasic zinc phosphate, cloud is then added
Female powder, aluminium triphosphate and barium sulfate stir 30 minutes to fineness less than or equal to 15 microns under the speed of 1500rpm.
Prepare the first component
Stock up by weight: 1 part of wetting agent, 1 part of levelling agent, 15 parts of water, 5 parts of dipropylene glycol methyl ether, has 1 part of defoaming agent
50 parts of machine fluorine-silicon modified acrylic resin, 50 parts of aqueous color paste, 0.2 part of neutralizer.
Mix wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste, after being sufficiently mixed with
The speed of 600rpm stirs 15 minutes, and organosilicon modified crylic acid resin is then added, and stirs 15 points with the speed of 1200rpm
Clock；Again plus neutralizer, it is stirred 15 minutes with the speed of 800rpm.
Prepare the second component
It stocks up by weight: 75 parts of isocyanate resin, 25 parts of propylene-glycol diacetate, 8 parts of water absorbing agent.
The mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs 30 minutes.
It is that 5:1 mixes the first component and the second component with mass ratio.
The viscosity of suitable spraying or roller coating is diluted to the deionized water for the coating addition proper proportion that embodiment 2 obtains.
Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 2.
The coating property test that 2 embodiment 2 of table provides
From the results shown in Table 2: each performance test of coating that embodiment 2 provides is up to standard, weatherability, salt spray resistance
Property, salt water resistance etc. are up to standard.The weather resistance of coating that embodiment 2 provides, salt fog resistance almost than embodiment 1, table
Dry time and the time of doing solid work are shorter than the coating of the offer of embodiment 1.
Embodiment 3
The present embodiment provides a kind of coating, which is mainly made by following steps:
It prepares organosilicon modified crylic acid resin: 100 parts by weight aqueous acrylamide resins being heated to 60 DEG C, 10 weight are added
The methoxy silane coupling agent solution of part 55wt%, the speed at 55 DEG C with 740rpm are stirred to react 23 hours.
Prepare aqueous color paste
It stocks up by weight: 32 parts of water, 4 parts of antirust agent, 4 parts of neutralizer, 8 parts of dispersing agent, 1.5 parts of defoaming agent, mica powder
13 parts, 16 parts of pigment, 12 parts of trbasic zinc phosphate, 8 parts of aluminium triphosphate, 12 parts of barium sulfate.
First neutralizer, dispersing agent, antirust agent, defoaming agent and water are uniformly mixed, pigment, trbasic zinc phosphate, cloud is then added
Female powder, aluminium triphosphate and barium sulfate stir 25 minutes to fineness less than or equal to 15 microns under the speed of 1200rpm.
Prepare the first component
It stocks up by weight: 0.8 part of wetting agent, 0.8 part of defoaming agent, 0.7 part of levelling agent, 12 parts of water, dipropylene glycol methyl ether 4
Part, 45 parts of organosilicon modified crylic acid resin, 48 parts of aqueous color paste, 0.15 part of neutralizer.
Mix wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste, after being sufficiently mixed with
The speed of 550rpm stirs 12 minutes, and organosilicon modified crylic acid resin is then added, and stirs 13 points with the speed of 1100rpm
Clock；Again plus neutralizer, it is stirred 12 minutes with the speed of 700rpm.
Prepare the second component
It stocks up by weight: 72 parts of isocyanate resin, 23 parts of propylene-glycol diacetate, 5 parts of water absorbing agent.
The mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs 26 minutes.
It is that 4:1 mixes the first component and the second component with mass ratio.
The viscosity of suitable spraying or roller coating is diluted to the deionized water for the coating addition proper proportion that embodiment 3 obtains.
Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 3.
The coating property test that 3 embodiment 3 of table provides
From the results shown in Table 3: each performance test of coating that embodiment 3 provides is up to standard, weatherability, salt spray resistance
Property, salt water resistance etc. are up to standard.The salt spray resistance for the coating that embodiment 3 provides is better than the salt spray resistance of embodiment 2.
Embodiment 4
Prepare the first component
It stocks up by weight: 0.8 part of wetting agent, 0.6 part of defoaming agent, 0.7 part of levelling agent, 12 parts of water, dipropylene glycol methyl ether 4
Part, 44 parts of organosilicon modified crylic acid resin, 48 parts of aqueous color paste, 0.16 part of neutralizer.
Mix wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste, after being sufficiently mixed with
The speed of 570rpm stirs 14 minutes, and organosilicon modified crylic acid resin is then added, and stirs 13 points with the speed of 1080rpm
Clock；Again plus neutralizer, it is stirred 13 minutes with the speed of 580rpm.
Prepare the second component:
It stocks up by weight: 73 parts of isocyanate resin, 22 parts of propylene-glycol diacetate, 6 parts of water absorbing agent.
The mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs 28 minutes.
It is that 4:1 mixes the first component and the second component with mass ratio.
The viscosity of suitable spraying or roller coating is diluted to the deionized water for the coating addition proper proportion that embodiment 4 obtains.
Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 4.
The coating property test that 4 embodiment 4 of table provides
From the results shown in Table 4: the weatherability of coating that embodiment 4 provides, surface drying, do solid work etc. it is up to standard.Implement
That antirust agent is not added in example 4, the salt fog resistance of embodiment 4 is below standard, but the weatherability in embodiment 4 reaches standard.It is real
The weatherability for applying 4 coating of example is identical as embodiment 2, and surface drying does solid work coating of the time greater than embodiment 2 and embodiment 1；Explanation
Organosilicon modified crylic acid resin that organosilicon modified crylic acid resin step that embodiment 1 and embodiment 2 provided prepare obtains,
Prepare organosilicon modified crylic acid resin that aqueous color paste performance that aqueous color paste step obtains is used better than embodiment 4 with it is aqueous
Mill base.
Embodiment 5
Prepare the first component
It stocks up by weight: 0.8 part of wetting agent, 0.8 part of defoaming agent, 0.6 part of levelling agent, 13 parts of water, dipropylene glycol methyl ether 4
Part, 42 parts of organosilicon modified crylic acid resin, 48 parts of aqueous color paste, 0.18 part of neutralizer.
Mix wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste, after being sufficiently mixed with
The speed of 550rpm stirs 10 minutes, and organosilicon modified crylic acid resin is then added, and stirs 15 points with the speed of 1000rpm
Clock；Again plus neutralizer, it is stirred 15 minutes with the speed of 500rpm.
Prepare the second component
It stocks up by weight: 73 parts of isocyanate resin, 25 parts of propylene-glycol diacetate, 7 parts of water absorbing agent.
The mixture for being blended with isocyanate resin, propylene-glycol diacetate and water absorbing agent stirs 26 minutes.
It is that 4:1 mixes the first component and the second component with mass ratio.
The viscosity of suitable spraying or roller coating is diluted to the deionized water for the coating addition proper proportion that embodiment 5 obtains.
Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 5.
The coating property test that 5 embodiment 5 of table provides
From the results shown in Table 5: the weatherability of coating that embodiment 5 provides, surface drying, do solid work etc. it is up to standard.Implement
That antirust agent is not added in example 5, the salt fog resistance of embodiment 5 is below standard, but the weatherability in embodiment 5 reaches standard.It is real
The coating property for applying example 5 is close with the coating property of embodiment 4.The weatherability of 5 coating of embodiment is identical as embodiment 2, table
The coating done, do solid work the time greater than embodiment 2 and embodiment 1；The organosilicon for preparing for illustrating that embodiment 1 is provided with embodiment 2 changes
Organosilicon modified crylic acid resin that property acrylic resin step obtains prepares the aqueous color paste performance that aqueous color paste step obtains
The organosilicon modified crylic acid resin and aqueous color paste used better than embodiment 5.
Embodiment 6
The step of embodiment 6 provides a kind of coating, the first component of coating preparation that embodiment 6 provides, raw material, material rate
Same as Example 5, embodiment 6 is the difference is that second group of embodiment 6 is divided into isocyanate resin；Then with matter
Amount is than being that 4:1 mixes the first component and isocyanate resin.
It is tested referring to the coating that the test method of embodiment 5 provides embodiment 6.Test result is as shown in table 6.
The coating property test that 6 embodiment 6 of table provides
From the results shown in Table 6: the weatherability of coating that embodiment 6 provides, surface drying, do solid work etc. it is up to standard.Comparison
Table 6 and table 5 are as can be seen that the coating surface drying provided of embodiment 6, long, weatherability of doing solid work the time more corresponding than embodiment 5 time
Slightly worse than embodiment 5, the second component for illustrating that the second component ratio embodiment 6 that embodiment 5 provides provides are more advantageous to coating
Weather resistance.
Comparative example 1
This comparative example provides a kind of coating, buys in Shanghai Chemical Co., Ltd., belongs to acrylic resin paint.
Comparative example 2
This comparative example provides a kind of coating, and the raw material of coating, ratio are same as Example 4, the difference is that:
In this comparative example, all raw materials are mixed then to stir together and are made by first group of timesharing of preparation.
Test example
The deionized water for the coating addition proper proportion that comparative example 1 and comparative example 2 provide is diluted to suitable spraying or roller
The viscosity of painting.Standing reuses after five minutes, and the performance after the film of the coating is dried seven days in a natural environment is as shown in table 6.
In table, artificial acceleration weatherability >=500H is referring to GB/T1865, and salt-fog resistant time is referring to GB/T1771.
The coating property test that 7 comparative example 1 and 2 of table provides
According to table 7 as can be seen that the coating property of comparative example 2 is worse than the coating of the offer of comparative example 1；The weather resistance of the two
It is poor.
Refering to table 1- table 7, illustrate that the weather resistance for the coating that 1-6 of the embodiment of the present invention is provided is preferable, and embodiment 1 mentions
The performance of the coating of confession is better than remaining embodiment；In addition, the weather resistance for the coating that comparative example 1 is provided with comparative example 2 is worse than
The coating that embodiment 1-6 is provided.Illustrate the performance for the coating that the preparation method of coating provided in an embodiment of the present invention is prepared
Preferably.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of coating, which is characterized in that the preparation method of the coating specifically includes that
It prepares the first component: being blended with the mixed of wetting agent, defoaming agent, levelling agent, water, dipropylene glycol methyl ether and aqueous color paste
It closes and adds neutralizer after organosilicon modified crylic acid resin reaction preset time is added in object；
Wherein, raw material is as follows according to parts by weight in the step of the first component of the preparation:
Described wetting agent 0.5-1 parts, it is defoaming agent 0.5-1 parts described, levelling agent 0.5-1 parts described, water 10-15 parts described, described
3-5 parts of dipropylene glycol methyl ether, it is organosilicon modified crylic acid resin 40-50 parts described, aqueous color paste 45-50 parts described, described in
With 0.1-0.2 parts of agent.
2. the preparation method of coating according to claim 1, which is characterized in that before the step of the first component of the preparation
Further include:
It prepares the organosilicon modified crylic acid resin: aqueous acrylamide resin being heated to 50 DEG C -60 DEG C, methoxy silane is added
Coupling agent solution is stirred to react 22-25 hours at 50 DEG C -60 DEG C.
3. the preparation method of coating according to claim 1, which is characterized in that before the step of the first component of the preparation
Further include:
It prepares the aqueous color paste: being blended with neutralizer, dispersing agent, defoaming agent, pigment, trbasic zinc phosphate, mica powder, water, trimerization
The mixture of aluminum phosphate and barium sulfate is ground to fineness less than or equal to 15 microns；
Wherein, raw material is as follows according to parts by weight in described the step of preparing the aqueous color paste:
Described water 30-35 parts, neutralizer 3-5 parts described, dispersing agent 5-10 parts described, the defoaming agent 1-2 parts described, mica powder
10-15 parts, pigment 10-20 parts described, trbasic zinc phosphate 10-15 parts described, aluminium triphosphate 5-10 parts described, the barium sulfate 15-
10 parts.
4. the preparation method of coating according to claim 3, which is characterized in that described to prepare the aqueous color paste step tool
Body includes: first to be uniformly mixed the neutralizer, the dispersing agent, the defoaming agent and the water, and the face is then added
Material, the trbasic zinc phosphate, the mica powder, the aluminium triphosphate and the barium sulfate are in the speed of 1000rpm-1500rpm
Lower stirring 20-30 minutes.
5. the preparation method of coating according to claim 3, which is characterized in that described to prepare the aqueous color paste step
In, it further include that the antirust agent of 3-5 parts by weight is added in the mixture.
6. the preparation method of coating according to claim 1-5, which is characterized in that the preparation method of the coating
Further include:
It prepares the second component: being blended with the mixture stirring the of isocyanate resin, propylene-glycol diacetate and water absorbing agent
Four preset times；
Wherein, raw material is as follows according to parts by weight in the step of the second component of the preparation:
Described isocyanate resin 70-75 parts, it is propylene-glycol diacetate 20-25 parts described, water absorbing agent 3-8 parts described.
7. the preparation method of coating according to claim 1, which is characterized in that the mixture is added the organosilicon and changes
Property acrylic resin before include being stirred described mixture 10-15 minutes with the speed of 500rpm-600rpm；
Being added before the neutralizer is added in the organosilicon modified crylic acid resin later further includes with 1000rpm-1200rpm
Speed stir 10-15 minutes；
It is added after the neutralizer and is stirred 10-15 minutes with the speed of 500rpm-800rpm.
8. the preparation method of coating according to claim 7, which is characterized in that the preparation method of the coating further include:
By the first component that the first composition step of the preparation obtains and the second component that the second composition step of the preparation obtains
Mixing.
9. the preparation method of coating according to claim 8, which is characterized in that first component and second component
Mixed mass ratio is 3-5:1.
10. a kind of coating, which is characterized in that the coating by the described in any item coating of claim 1-9 preparation method system
?.
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| CN201811544375.9A CN109666393A (en) | 2018-12-17 | 2018-12-17 | Coating and preparation method thereof |
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| CN113698817A (en) * | 2021-07-26 | 2021-11-26 | 丹阳市现代实业有限公司 | Stain-resistant water-based coating composition |
| CN117801647A (en) * | 2023-11-17 | 2024-04-02 | 雅图高新材料股份有限公司 | Water-based paint composition suitable for wet-on-wet construction and preparation method and application thereof |
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