CN108504233A - A kind of preparation method of low gloss extinction electrophoresis coating - Google Patents
A kind of preparation method of low gloss extinction electrophoresis coating Download PDFInfo
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- CN108504233A CN108504233A CN201810249540.1A CN201810249540A CN108504233A CN 108504233 A CN108504233 A CN 108504233A CN 201810249540 A CN201810249540 A CN 201810249540A CN 108504233 A CN108504233 A CN 108504233A
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- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
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- C09D5/4407—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained by polymerisation reactions involving only carbon-to-carbon unsaturated bonds
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Abstract
The present invention relates to the preparation methods of low gloss extinction electrophoresis coating, it includes acrylic resin and amino resins, and the acrylic resin is prepared by the raw material of following mass fraction：10 50 parts of 34 parts of methacrylic acid isooctyl, 69 parts of n-butyl acrylate, 58 parts of methyl methacrylate, 13 parts of styrene, 0.5 1 parts of acrylic acid, 12 parts of 2 hydroxyl ethyl ester of methacrylic acid, 34 parts of 2 hydroxyl ethyl ester of acrylic acid, 34 parts of 2 hydroxypropyl acrylate of acrylic acid, 26 parts of makrolon, 0.05 0.3 parts of dinonylnaphthalene sulfonic acid, 0.08 0.2 parts of composite initiator, 12 parts of neutralizer, 0.01 0.02 parts of antifoaming agent, 8 15 parts of n-butanol, 8 15 parts of isopropanol and deionized water.So that final electrophoretic coating extinction effect obtained is good（60 degree of glossometer detections are less than 10 degree）, storage 1 year or more, no lamination, stability is good；And paint film flatness is good, contamination resistance is strong.
Description
Technical field
The present invention relates to a kind of preparation methods of low gloss extinction electrophoresis coating, belong to technical field of coatings.
Background technology
Electrophoresis is one of coating metal workpiece most efficient method.Electrophoretic coating is a kind of novel low stain, save the energy,
Resource-saving and the good coating of anticorrosive property, it has a smooth coating, water resistance and the good advantage of chemical-resistance, and easy to implement
The mechanization and automation of application industry, it is suitable complex-shaped, there are edge corner angle, hole Workpiece coating, is widely used in vapour
The application of the handwares such as vehicle, automatic vehicle, electromechanics, household electrical appliances.
In order to obtain extinction effect, a kind of method is that delustering agent is added in coating, such as silica, organic particle.
But the chemical resistance of delustering agent superfine silicon dioxide, especially alkali resistance are poor, cannot obtain the painting of good transparency
Film, for the coated article of coating decoration complexity, superfine silicon dioxide can deposit on coated article, thus in coated article part area
Domain, especially vertical plane etc., the shortcomings of will produce gloss difference.Method organic particle being dispersed in coating（It is special public
Clear 51-8975 bulletins）, since organic fine particles electrophoresis is poor, organic particle can fall off when washing, and not be suitable for electrophoresis painting
Material.In addition, using the delustering agent of the class of amidine containing ring the easy yellowing of coating and be baking property it is poor.
Another method be synthesis matting resin, such as tekiaki 59-67396 bulletins, tekiaki 64-14281 bulletins,
Unexamined Patent 05-263296 bulletins, with reference to Unexamined Patent 2-255871 bulletins, referring to Unexamined Patent 11-315254 bulletins, Unexamined Patent
The similar technique reported in 2001-131494 bulletins, but when by changing application condition variation gloss, be easy after by electrophoresis
The influence of cleaning process can become the condition for restricting coating decoration.
Other methods have the side for coordinating the functional group that can be reacted with the carboxyl to form microgel using the carboxyl in resin
Method.This kind of functional group is just like epoxy group（Tekiaki 59-138278 bulletins, special open 2-12511 bulletins,
CN1307270C）, oxazolinyls（Unexamined Patent 6-25568 bulletins）Deng.In this type of method, in order to obtain stable low light
Pool, it is necessary to particle inner gel is formed by heating reaction, thus it is upper cumbersome in manufacture.
With the continuous development of electrophoretic coating, market proposes its glossiness, stability etc. more next using more and more
Higher requirement.Existing electrophoretic coating, after delustering agent is added, glossiness can reach low light（60 degree of glossometers are measured small
In equal to 10 degree）, but its stability is poor, and storage in 3-5 months just will appear lamination, and using rear paint film out-of-flatness, no
It is fine and smooth.Developing the low gloss extinction electrophoresis coating of novel high stability becomes a research direction.
Invention content
The technical problem to be solved by the present invention is to provide a kind of high stability low gloss delustring for the above-mentioned prior art
The preparation method of electrophoretic coating.
Technical solution is used by the present invention solves the above problems：A kind of low gloss extinction electrophoresis coating, it includes third
Olefin(e) acid resin and amino resins；The mass ratio of acrylic resin and amino resins is 1：0.2-1；
The acrylic resin is prepared by the raw material of following mass fraction：3-4 parts of methacrylic acid isooctyl, propylene
Sour N-butyl 6-9 parts, 5-8 parts of methyl methacrylate, 1-3 parts of styrene, 0.5-1 parts of acrylic acid, methacrylic acid 2- hydroxyls
1-2 parts of ethyl ester, 3-4 parts of acrylic acid 2- hydroxyl ethyl esters, 3-4 parts of acrylic acid 2- hydroxypropyl acrylates, 2-6 parts of makrolon, dinonylnaphthalene sulfonic acid
0.05-0.3 parts, 0.08-0.2 parts of composite initiator, 1-2 parts of neutralizer, 0.01-0.02 parts of antifoaming agent, n-butanol 8-15
10-50 parts of part, 8-15 parts of isopropanol and deionized water.
The number-average molecular weight of the makrolon is 2-10 ten thousand.
The composite initiator is both azo-bis-isobutyl cyanide and DCP (cumyl peroxide) according to 1:The quality of 2-5
It is more compound than carrying out.Using DCP as initiator, side chain reaction can be increased, increase the adhesive force and corrosion resistance of coating, especially
It, which is resistance sexuality, is significantly enhanced；It can promote the conversion ratio of monomer using azo-bis-isobutyl cyanide, the compatibility of the two,
Realize that low temperature causes, high temperature sustained response.Due to that can discharge thermal energy in reaction process, the temperature of system can rise and occur compared with
Big fluctuation, in order to ensure reaction is not acted upon by temperature changes, the DCP initiators of introducing mainly ensure that the stabilization under high temperature is anti-
It answers, it is ensured that high/low temperature is reacted.
Neutralizer is triethanolamine, methyl diethanolamine or triethylamine.
The preparation method of above-mentioned acrylic resin：
Step 1: configuration mixed solution
By methacrylic acid isooctyl, n-butyl acrylate, methyl methacrylate, styrene, acrylic acid, methacrylic acid 2-
Hydroxyl ethyl ester, acrylic acid 2- hydroxyl ethyl esters, acrylic acid 2- hydroxypropyl acrylates, makrolon, dinonylnaphthalene sulfonic acid are mixed to form mixed solution；
Step 2: water soluble acrylic resin is molded
It using n-butanol, isopropanol and accounts for the deionized water of 5%-15% of ion water inventory in reaction vessel and is warming up to as bottom material
95-105 DEG C, compound draw is added dropwise in the mixed solution made of a dropping step one into reaction vessel, time for adding 150-200min
Agent is sent out, composite initiator controls rate of addition by four dropwise additions, according to reaction severe degree；Then reaction vessel keeps the temperature 150-
280min, then reaction vessel be cooled to 60 DEG C and stirred evenly hereinafter, neutralizer is added into reaction vessel, then to reaction vessel
Middle addition antifoaming agent, finally plus the dilution of remaining deionized water is molded.
The amino resins is made of following raw material：Methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphoric acid
Salt modified cyanurotriamide resin, coupling agent, modified nano-alumina；The methyl-etherified melmac be by melamine and
Formaldehyde is through condensation, the resin that again with methanol is etherified；The butyl ether melmac zoguanamine resin is passed through by melamine and formaldehyde
It is condensed, then the resin obtained with butanol etherification；The phosphate-modified melmac is by melamine, formaldehyde, modification
The resin that phosphate condensation obtains；The methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified trimerization
The mass ratio of melamine resin is 30-40:30-40:10-20.
Further, wherein in the methyl-etherified melmac raw material melamine, formaldehyde and methanol molar ratio
It is 1:4-6:8-10.
Further, wherein in the butyl ether melmac zoguanamine resin raw material melamine, formaldehyde and butanol molar ratio
It is 1:2-4:6-8.
Further, wherein the modified phosphate is at least one of calgon, sodium tripolyphosphate.
Further, wherein melamine, formaldehyde, modification in the preparation process of the phosphate-modified melmac
Phosphatic additive amount is 1 in molar ratio:3-6:0.2-0.6.
Further, wherein the modified nano-alumina is end hydrogen silicone oil modified nano-alumina.
Further, wherein the average grain diameter of the modified nano-alumina is 20nm.
Further, wherein the coupling agent is at least one of titanate ester and aluminic acid compound.
Further, wherein the molecular weight of the end hydrogen silicone oil is 500-600.
A kind of preparation method of above-mentioned extinction electrophoresis aqueous coating dissolubility bridging agent, including：
（1）End hydrogen silicone oil and nano aluminium oxide are kneaded uniformly in high speed mixing agent machine by the speed of 1500-2000rmp/min；
（2）With triethanolamine adjust formalin pH to 10.0-10.5, then by melamine, formalin press than
Example mixing, is heated to 75-85 DEG C, after the color of solution to be mixed gradually becomes clear by white, be added methanol or
Butanol or modified phosphate the reaction was continued 3.5-4.5 hour, respectively obtain methyl-etherified melmac, fourth etherified melamine
Polyimide resin, phosphate-modified melmac；
（3）By methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified melmac, coupling agent,
Modified nano-alumina is uniformly mixed in a mixer.
Methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified melmac are by compounding
The compound water soluble amino resin formed has good compatibility, and due to more free methylol and centainly
The addition of the imino group and polyphosphate polar group of amount, can mutually be crosslinked between strand, improve the secured of film forming
Degree.And by the melamine of different proportion and formaldehyde carry out preshrunk and, the alcohols of not dosage is then added, can be effective
Methyl-etherified melmac, the etherificate degree of butyl ether melmac zoguanamine resin and free methylol group content are controlled, to improve
Amino resins solubility, from the combination degree of different grounds.In order to preferably realize the technique effect of the present invention, methyl-etherified trimerization
Melamine resin, butyl ether melmac zoguanamine resin, phosphate-modified melmac mass ratio be 30-40:30-40:10-
20, preferably 35:35:15.Solubility and activity end quantity is improved in order to preferably realize, in methyl-etherified melmac
The molar ratio of raw material melamine, formaldehyde and methanol is 1：4-6：8-10, preferably 1:5:9.In order to preferably realize that raising is molten
Xie Du and reactive terminal quantity, the molar ratio of raw material melamine, formaldehyde and butanol is 1 in butyl ether melmac zoguanamine resin：2-
4：6-8, preferably 1:3:7.Modified phosphate is at least one of calgon, sodium tripolyphosphate.Phosphate-modified trimerization
Melamine in the preparation process of melamine resin, formaldehyde, modified phosphate additive amount be 1 in molar ratio:3-6:0.2-0.6,
Preferably 1:4:0.4.
The molecular weight of end hydrogen silicone oil is 500-600, and the end hydrogen silicone oil under the molecular weight has viscosity（25 DEG C, mpas）
For 2-3, the end hydrogen silicone oil under the viscosity have preferably with the associativity of nano aluminium oxide, and the nano aluminium oxide being modified
With better dispersibility.The addition of end hydrogen silicone oil is preferably 5-10 mass %, and excessive or too small amount all can not achieve optimal
Technique effect.It, can be effectively in binding resin ingredient using the reactive terminal of end hydrogen silicone oil by the addition of end hydrogen silicone oil
Imino group, and at the same time crosslinking agent can be used as, promotes film forming characteristics to improve the fitness and dispersion degree of nano aluminium oxide
And firmness.The grain size of nano aluminium oxide is preferably 20nm, has higher Extinction Characteristic under the grain size, and can have
Preferable dispersion degree.The coupling agent is at least one of titanate ester and aluminic acid compound, preferably titanate coupling agent.It is logical
Addition coupling agent is crossed, the dispersion degree of nano aluminium oxide is further promoted.
Compared with the prior art, the advantages of the present invention are as follows：
The present invention is hydrophobic using dinonylnaphthalene sulfonic acid progress, is subject to makrolon as delustering agent, using molecular weight in 2-10 ten thousand
Makrolon, and improve its dosage, while increasing carboxylic monomer dosage, reduce the dosage of acrylic acid and initiator so that most
Electrophoretic coating extinction effect made from end is good（60 degree of glossometer detections are less than 10 degree）, store 1 year or more, no lamination, surely
It is qualitative good；By being constituted with methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified melmac
Ternary system be matrix, by add modified nano-alumina, extinction and adhesion strength can be effectively improved.And paint film is smooth
It spends, contamination resistance is strong.In reaction process, four dropwise additions of composite initiator part are reacted with complete and safely controllable.
Specific implementation mode
Present invention is further described in detail with reference to embodiments.
Embodiment 1, a kind of low gloss extinction electrophoresis coating, the mass ratio of acrylic resin and amino resins in material of main part
It is 1：0.5；Wherein：
Acrylic resin is prepared by the raw material of following mass fraction：3 parts of methacrylic acid isooctyl, n-butyl acrylate
8 parts, 7 parts of methyl methacrylate, 2 parts of styrene, 0.5 part of acrylic acid, 2 parts of 2-Hydroxyethyl methacrylate, acrylic acid 2- hydroxyls
3 parts of ethyl ester, 3 parts of acrylic acid 2- hydroxypropyl acrylates, 6 parts of makrolon（Number-average molecular weight is 70,000）, it is 0.1 part of dinonylnaphthalene sulfonic acid, multiple
Close 0.1 part of initiator（Both azo-bis-isobutyl cyanide and DCP (cumyl peroxide) are according to 1:3）, triethanolamine neutralizer 1
Part, 0.01 part of antifoaming agent, 10 parts of n-butanol, 10 parts of isopropanol and 30 parts of deionized water.Preparation method is as follows：
Step 1: configuration mixed solution
By methacrylic acid isooctyl, n-butyl acrylate, methyl methacrylate, styrene, acrylic acid, methacrylic acid 2-
Hydroxyl ethyl ester, acrylic acid 2- hydroxyl ethyl esters, acrylic acid 2- hydroxypropyl acrylates, makrolon, dinonylnaphthalene sulfonic acid are mixed to form mixed solution；
Step 2: water soluble acrylic resin is molded
It using n-butanol, isopropanol and accounts for the deionized water of 5%-15% of ion water inventory in reaction vessel and is warming up to as bottom material
95-105 DEG C, compound draw is added dropwise in the mixed solution made of a dropping step one into reaction vessel, time for adding 150-200min
Agent is sent out, composite initiator controls rate of addition by four dropwise additions, according to reaction severe degree；Then reaction vessel keeps the temperature 150-
280min, then reaction vessel be cooled to 60 DEG C and stirred evenly hereinafter, neutralizer is added into reaction vessel, then to reaction vessel
Middle addition antifoaming agent, finally plus the dilution of remaining deionized water is molded.
The amino resins is made of following raw material：Methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphoric acid
Salt modified cyanurotriamide resin, coupling agent, modified nano-alumina；The methyl-etherified melmac, fourth etherified melamine
Polyimide resin, phosphate-modified melmac mass ratio be 35:35:15.
Raw material melamine in methyl-etherified melmac, formaldehyde molar ratio be 1：5.
Raw material melamine in butyl ether melmac zoguanamine resin, formaldehyde molar ratio be 1：3.
Modified phosphate is calgon.Melamine, first in the preparation process of phosphate-modified melmac
Aldehyde, modified phosphate additive amount in molar ratio be 1:4:0.4.Modified nano-alumina aoxidizes for end hydrogen silicone oil modified Nano
Aluminium.The average grain diameter of modified nano-alumina is 20nm.Coupling agent is titanate coupling agent.The molecular weight of the end hydrogen silicone oil is
500-600, addition are 5 mass %.
A kind of preparation method of above-mentioned amino resins, including：
（1）End hydrogen silicone oil and nano aluminium oxide are kneaded uniformly in high speed mixing agent machine by the speed of 1500-2000rmp/min；
（2）With triethanolamine adjust formalin pH to 10.0-10.5, then by melamine, formalin press than
Example mixing, is heated to 75-85 DEG C, after the color of solution to be mixed gradually becomes clear by white, is added excessive
Methanol or excessive butanol or modified phosphate the reaction was continued 3.5-4.5 hour, respectively obtain methyl-etherified melamine tree
Fat, butyl ether melmac zoguanamine resin, phosphate-modified melmac；
（3）By methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified melmac, coupling agent,
Modified nano-alumina is uniformly mixed in a mixer.
Acrylic resin obtained is mixed in proportion with amino resins, neutralizer and deionized water appropriate is added, i.e.,
Low gloss extinction electrophoresis coating can be made.
Embodiment 2, a kind of low gloss extinction electrophoresis coating, the acrylic resin are by the raw material system of following mass fraction
It is standby to obtain：4 parts of methacrylic acid isooctyl, 8 parts of n-butyl acrylate, 6 parts of methyl methacrylate, 3 parts of styrene, acrylic acid
1 part, 1.5 parts of 2-Hydroxyethyl methacrylate, 3.5 parts of acrylic acid 2- hydroxyl ethyl esters, 3.5 parts of acrylic acid 2- hydroxypropyl acrylates, makrolon
5 parts（Number-average molecular weight is 60,000）, 0.15 part of dinonylnaphthalene sulfonic acid, 0.08 part of composite initiator（Azo-bis-isobutyl cyanide and DCP (mistakes
Aoxidize diisopropylbenzene (DIPB)) both according to 1:3）, 1.2 parts of triethanolamine neutralizer, 0.01 part of antifoaming agent, 10 parts of n-butanol, isopropanol
10 parts and 30 parts of deionized water.
Remaining is same with embodiment 1.
Embodiment 3, a kind of low gloss extinction electrophoresis coating, the acrylic resin are by the raw material system of following mass fraction
It is standby to obtain：3.5 parts of methacrylic acid isooctyl, 9 parts of n-butyl acrylate, 8 parts of methyl methacrylate, 2 parts of styrene, propylene
0.8 part of acid, 1 part of 2-Hydroxyethyl methacrylate, 4 parts of acrylic acid 2- hydroxyl ethyl esters, 3 parts of acrylic acid 2- hydroxypropyl acrylates, 4 parts of makrolon
（Number-average molecular weight is 80,000）, 0.05 part of dinonylnaphthalene sulfonic acid, 0.1 part of composite initiator（Azo-bis-isobutyl cyanide and DCP (peroxidating
Diisopropylbenzene (DIPB)) both according to 1:2）, 1.5 parts of methyl diethanolamine neutralizer, 0.02 part of antifoaming agent, 15 parts of n-butanol, isopropanol
15 parts and 40 parts of deionized water.
Remaining is same with embodiment 1.
Embodiment 4, a kind of low gloss extinction electrophoresis coating, the acrylic resin are by the raw material system of following mass fraction
It is standby to obtain：4 parts of methacrylic acid isooctyl, 6 parts of n-butyl acrylate, 8 parts of methyl methacrylate, 3 parts of styrene, acrylic acid
1 part, 2 parts of 2-Hydroxyethyl methacrylate, 3 parts of acrylic acid 2- hydroxyl ethyl esters, 3 parts of acrylic acid 2- hydroxypropyl acrylates, 4 parts of makrolon（Number
Average molecular weight is 80,000）, 0.2 part of dinonylnaphthalene sulfonic acid, 0.2 part of composite initiator（(peroxidating two is different by azo-bis-isobutyl cyanide and DCP
Propyl benzene) both according to 1:5）, 1.5 parts of methyl diethanolamine neutralizer, 0.02 part of antifoaming agent, 10 parts of n-butanol, 8 parts of isopropanol
And 20 parts of deionized water.
Remaining is same with embodiment 1.
Embodiment 5, a kind of low gloss extinction electrophoresis coating, the acrylic resin are by the raw material system of following mass fraction
It is standby to obtain：3.5 parts of methacrylic acid isooctyl, 9 parts of n-butyl acrylate, 5 parts of methyl methacrylate, 1 part of styrene, propylene
0.5 part of acid, 1 part of 2-Hydroxyethyl methacrylate, 4 parts of acrylic acid 2- hydroxyl ethyl esters, 4 parts of acrylic acid 2- hydroxypropyl acrylates, 3 parts of makrolon
（Number-average molecular weight is 80,000）, 0.2 part of dinonylnaphthalene sulfonic acid, 0.2 part of composite initiator（Azo-bis-isobutyl cyanide and DCP (peroxidating
Diisopropylbenzene (DIPB)) both according to 1:4）, 1.5 parts of methyl diethanolamine neutralizer, 0.02 part of antifoaming agent, 10 parts of n-butanol, isopropanol
8 parts and 20 parts of deionized water.
Remaining is same with embodiment 1.
Each material component of comparative example of water soluble acrylic resin is as follows：
Comparative example 1, a kind of electrophoretic coating acrylic resin, it is prepared by the raw material of following mass fraction：Methyl-prop
3 parts of olefin(e) acid isooctyl, 8 parts of n-butyl acrylate, 7 parts of methyl methacrylate, 2 parts of styrene, 0.5 part of acrylic acid, methyl-prop
2 parts of olefin(e) acid 2- hydroxyl ethyl esters, 3 parts of acrylic acid 2- hydroxyl ethyl esters, 3 parts of acrylic acid 2- hydroxypropyl acrylates, 6 parts of makrolon（Number-average molecular weight is
70000）, 0.1 part of composite initiator（Both azo-bis-isobutyl cyanide and DCP (cumyl peroxide) are according to 1:3）, in triethanolamine
With 30 parts of 1 part of agent, 0.01 part of antifoaming agent, 10 parts of n-butanol, 10 parts of isopropanol and deionized water.
It is differed only in embodiment 1, comparative example 1 prepares acrylic resin and do not use dinonylnaphthalene sulfonic acid.
Comparative example 2, a kind of electrophoretic coating acrylic resin, it is prepared by the raw material of following mass fraction：First
3 parts of base acrylic acid isooctyl, 8 parts of n-butyl acrylate, 7 parts of methyl methacrylate, 2 parts of styrene, 0.5 part of acrylic acid, first
3 parts of base acrylic acid 2- hydroxyl ethyl esters, 6 parts of makrolon（Number-average molecular weight is 70,000）, 0.1 part of dinonylnaphthalene sulfonic acid, composite initiator
0.1 part（Both azo-bis-isobutyl cyanide and DCP (cumyl peroxide) are according to 1:3）, 1 part of triethanolamine neutralizer, antifoaming agent
30 parts of 0.01 part, 10 parts of n-butanol, 10 parts of isopropanol and deionized water.
It is differed only in embodiment 1, prepares acrylic resin not only with 2-Hydroxyethyl methacrylate, do not adopt
With acrylic acid 2- hydroxyl ethyl esters and acrylic acid 2- hydroxypropyl acrylates（I.e. only with the single offer hydroxyl-functional of 2-Hydroxyethyl methacrylate
Group）, prepare and lack methyl-etherified melmac in the raw material of amino resins.
Comparative example 3
It is differed only in embodiment 1, is prepared acrylic resin using silica as delustering agent, is prepared amino resins
Raw material in lack methyl-etherified melmac.
Comparative example 4
It is differed only in embodiment 1, and the number-average molecular weight for preparing acrylic resin makrolon is 5000, prepares amino
Lack methyl-etherified melmac in the raw material of resin.
Comparative example 5
A kind of electrophoretic coating acrylic resin, it is prepared by the raw material of following mass fraction：Methacrylic acid is different pungent
3 parts of fat, 8 parts of n-butyl acrylate, 7 parts of methyl methacrylate, 2 parts of styrene, 3 parts of acrylic acid, methacrylic acid 2- hydroxyl second
6 parts of ester, 6 parts of makrolon（Number-average molecular weight is 70,000）, 0.1 part of dinonylnaphthalene sulfonic acid, 1 part of composite initiator（Two isobutyl of azo
Both cyanogen and DCP (cumyl peroxide) are according to 1:3）, 1 part of triethanolamine neutralizer, 0.01 part of antifoaming agent, n-butanol 10
30 parts of part, 10 parts of isopropanol and deionized water.
It is differed only in embodiment 1：The dosage for preparing acrylic resin acrylic acid and composite initiator significantly increases
Add, prepares and lack methyl-etherified melmac in the raw material of amino resins.
The glossiness and Detection of Stability of embodiment 1-5 and comparative example 1-5 are shown in Table 1.
Glossiness detects：After coating film forming made of same procedure, detected using 60 degree of glossometers.
Stability：It is stored under normal temperature condition.
Table 1
| Glossiness | At film outward appearance | Abrasion resistance/10,000 time | Resin stability | |
| Embodiment 1 | 6 degree | The smooth exquisiteness of paint film | >=1 ten thousand | Storage at normal temperature 1 year, it is not stratified |
| Embodiment 2 | 7 degree | The smooth exquisiteness of paint film | >=1 ten thousand | Storage at normal temperature 1 year, it is not stratified |
| Embodiment 3 | 9 degree | The smooth exquisiteness of paint film | >=1 ten thousand | Storage at normal temperature 1 year, it is not stratified |
| Embodiment 4 | 8 degree | The smooth exquisiteness of paint film | >=1 ten thousand | Storage at normal temperature 1 year, it is not stratified |
| Embodiment 5 | 9 degree | The smooth exquisiteness of paint film | >=1 ten thousand | Storage at normal temperature 1 year, it is not stratified |
| Comparative example 1 | 35 degree | It is paint film out-of-flatness, coarse | 6000-8 thousand | Storage at normal temperature 6 months, layering |
| Comparative example 2 | 28 degree | Generate spot | 6000-8 thousand | Storage at normal temperature 3 months, layering |
| Comparative example 3 | 8 degree | Spot is generated, it is paint film out-of-flatness, coarse | 6000-8 thousand | Storage at normal temperature 3 months, layering |
| Comparative example 4 | 35 degree | Paint film is smooth | 6000-8 thousand | Storage at normal temperature 1 year, it is not stratified |
| Comparative example 5 | 19 degree | Paint film is smooth | 6000-8 thousand | Storage at normal temperature 1 year, it is not stratified |
In addition to the implementation, the invention also includes have other embodiment, all use equivalent transformation or equivalent replacement modes
The technical solution of formation should all be fallen within the scope of the hereto appended claims.
Claims (8)
1. a kind of low gloss extinction electrophoresis coating, it is characterised in that：It includes acrylic resin and amino resins；Acrylic resin
Mass ratio with amino resins is 1：0.2-1；
The acrylic resin be include that the raw material of following mass fraction is prepared：3-4 parts of methacrylic acid isooctyl, third
6-9 parts of olefin(e) acid N-butyl, 5-8 parts of methyl methacrylate, 1-3 parts of styrene, 0.5-1 parts of acrylic acid, methacrylic acid 2-
1-2 parts of hydroxyl ethyl ester, 3-4 parts of acrylic acid 2- hydroxyl ethyl esters, 3-4 parts of acrylic acid 2- hydroxypropyl acrylates, 2-6 parts of makrolon, dinonyl naphthalene sulphur
0.05-0.3 parts sour, 0.08-0.2 parts of composite initiator, 1-2 parts of neutralizer, 0.01-0.02 parts of antifoaming agent, n-butanol 8-15
10-50 parts of part, 8-15 parts of isopropanol and deionized water；
The number-average molecular weight of the makrolon is 2-10 ten thousand；
The amino resins is made of following raw material：Methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate change
Property melmac, coupling agent, modified nano-alumina；The methyl-etherified melmac is by melamine and formaldehyde
Through condensation, then with the obtained height methyl-etherified melmac of excess methanol etherification；The butyl ether melmac zoguanamine resin is
By melamine and formaldehyde through condensation, then the height butyl ether melmac zoguanamine resin that is obtained with excess butanol etherification；The phosphoric acid
Salt modified cyanurotriamide resin is the resin being condensed to yield by melamine, formaldehyde, modified phosphate；The methyl-etherified melamine
Polyimide resin, butyl ether melmac zoguanamine resin, phosphate-modified melmac mass ratio be 30-40:30-40:10-20.
2. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The composite initiator is azo two
Both isobutyl cyanogen and DCP are according to 1:The mass ratio of 2-5 carries out compound.
3. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The neutralizer be triethanolamine,
Methyl diethanolamine or triethylamine.
4. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The modified phosphate is six inclined phosphorus
At least one of sour sodium, sodium tripolyphosphate.
5. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The wherein described phosphate-modified trimerization
Melamine in the preparation process of melamine resin, formaldehyde, modified phosphate additive amount be 1 in molar ratio:3-6:0.2-0.6.
6. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The wherein described modified nano-alumina
For end hydrogen silicone oil modified nano-alumina.
7. low gloss extinction electrophoresis coating according to claim 1, it is characterised in that：The wherein described modified nano-alumina
Average grain diameter be 20nm.
8. the method for preparing the low gloss extinction electrophoresis coating as described in one of claim 1-7, feature is in the method packet
Include following steps：
One, the preparation of acrylic resin：
Step 1: configuration mixed solution
By methacrylic acid isooctyl, n-butyl acrylate, methyl methacrylate, styrene, acrylic acid, methacrylic acid 2-
Hydroxyl ethyl ester, acrylic acid 2- hydroxyl ethyl esters, acrylic acid 2- hydroxypropyl acrylates, makrolon, dinonylnaphthalene sulfonic acid are mixed to form mixed solution；
Step 2: water soluble acrylic resin is molded
It using n-butanol, isopropanol and accounts for the deionized water of 5%-15% of ion water inventory in reaction vessel and is warming up to as bottom material
95-105 DEG C, compound draw is added dropwise in the mixed solution made of a dropping step one into reaction vessel, time for adding 150-200min
Agent is sent out, composite initiator controls rate of addition by four dropwise additions, according to reaction severe degree；Then reaction vessel keeps the temperature 150-
280min, then reaction vessel be cooled to 60 DEG C and stirred evenly hereinafter, neutralizer is added into reaction vessel, then to reaction vessel
Middle addition antifoaming agent, finally plus the dilution of remaining deionized water is molded；
Two, the preparation of amino resins：
（1）End hydrogen silicone oil and nano aluminium oxide are kneaded uniformly in high speed mixing agent machine by the speed of 1500-2000rmp/min；
（2）With triethanolamine adjust formalin pH to 10.0-10.5, then by melamine, formalin press than
Example mixing, is heated to 75-85 DEG C, after the color of solution to be mixed gradually becomes clear by white, is added excessive
Methanol or excessive butanol or modified phosphate the reaction was continued 3.5-4.5 hour, respectively obtain methyl-etherified melamine tree
Fat, butyl ether melmac zoguanamine resin, phosphate-modified melmac；
（3）By methyl-etherified melmac, butyl ether melmac zoguanamine resin, phosphate-modified melmac, coupling agent,
Modified nano-alumina is uniformly mixed in a mixer；
Three, the preparation of electrophoretic coating
What it is by the acrylic resin of above-mentioned preparation and amino resins is 1 in mass ratio：0.2-1 is mixed, and neutralizer and appropriate is added
Deionized water, stir evenly.
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| CN111040069A (en) * | 2019-12-25 | 2020-04-21 | 芜湖春风新材料有限公司 | Preparation method of organic silicon modified matte cathode electrophoresis resin and cathode matte electrophoresis emulsion prepared by same |
| CN112175468A (en) * | 2020-10-26 | 2021-01-05 | 厦门市金宝源实业有限公司 | Electrophoretic paint, preparation method and coating process thereof |
| CN112430414A (en) * | 2020-11-11 | 2021-03-02 | 江阴恒兴涂料有限公司 | Weather-resistant colored electrophoretic paint and preparation method thereof |
| CN115895376A (en) * | 2022-12-16 | 2023-04-04 | 广州优达涂料有限公司 | Extinction electrophoretic paint and preparation method thereof |
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| WO2006019803A2 (en) * | 2004-07-29 | 2006-02-23 | Masco Corporation | Electro-coat adhesion layer with a siloxane top coat |
| CN103788304A (en) * | 2014-01-09 | 2014-05-14 | 抚顺市久丰合成树脂制造有限公司 | Amino resin-grafted modified water-based acrylic resin and preparation method thereof |
| CN104558374A (en) * | 2013-10-29 | 2015-04-29 | 谭克凰 | Method for preparing acrylic resin |
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| WO2006019803A2 (en) * | 2004-07-29 | 2006-02-23 | Masco Corporation | Electro-coat adhesion layer with a siloxane top coat |
| CN104558374A (en) * | 2013-10-29 | 2015-04-29 | 谭克凰 | Method for preparing acrylic resin |
| CN103788304A (en) * | 2014-01-09 | 2014-05-14 | 抚顺市久丰合成树脂制造有限公司 | Amino resin-grafted modified water-based acrylic resin and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111040069A (en) * | 2019-12-25 | 2020-04-21 | 芜湖春风新材料有限公司 | Preparation method of organic silicon modified matte cathode electrophoresis resin and cathode matte electrophoresis emulsion prepared by same |
| CN112175468A (en) * | 2020-10-26 | 2021-01-05 | 厦门市金宝源实业有限公司 | Electrophoretic paint, preparation method and coating process thereof |
| CN112430414A (en) * | 2020-11-11 | 2021-03-02 | 江阴恒兴涂料有限公司 | Weather-resistant colored electrophoretic paint and preparation method thereof |
| CN115895376A (en) * | 2022-12-16 | 2023-04-04 | 广州优达涂料有限公司 | Extinction electrophoretic paint and preparation method thereof |
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| CN108504233B (en) | 2020-06-30 |
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