CN109111793A - A kind of electrophoretic coating mill base improving wearability - Google Patents
A kind of electrophoretic coating mill base improving wearability Download PDFInfo
- Publication number
- CN109111793A CN109111793A CN201810798363.2A CN201810798363A CN109111793A CN 109111793 A CN109111793 A CN 109111793A CN 201810798363 A CN201810798363 A CN 201810798363A CN 109111793 A CN109111793 A CN 109111793A
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- China
- Prior art keywords
- electrophoretic coating
- mill base
- epoxy resin
- improving wearability
- coating mill
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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
- C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
- C09D17/005—Carbon black
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of electrophoretic coating mill bases for improving wearability, including polyurethane modified epoxy grind resin, carbon black, kaolin, wetting dispersing agent, deionized water.The present invention uses polyurethane modified epoxy grind resin, has the advantages that improve wearability and moisture dispersibility is good.
Description
Technical field
The present invention relates in terms of electrophoretic coating, and in particular to a kind of electrophoretic coating mill base for improving wearability.
Background technique
As domestic more and more local governments put into effect " oil changes water " policy, water paint is just becoming one kind of the following coating
Trend.Electrophoretic coating has the advantages that the low VOC, environmentally protective of water paint as a branch important in water paint,
In addition to this there are also utilization rate height, high degree of automation, have excellent performance the advantages that, play an important role in terms of industrial coating.
95% or more is had reached in the use of automobile industry.Also there is very important ground in the use of hardware industry, household electric appliances etc.
Position.In process of production, in use process, inevitably will appear situations such as colliding with, wearing, therefore the wearability of coating is very heavy for workpiece
It wants.Conventional electrophoretic coating is divided into lotion and mill base two parts, can all influence the performance of coating.How lotion and mill base improved
Synergistic effect, to improve coating performance it is most important.
Summary of the invention
It is an object of the invention to provide a kind of electrophoretic coating mill bases for improving wearability, solve in above-mentioned prior art problem
It is one or more.
The present invention proposes a kind of electrophoretic coating mill base for improving wearability, including polyurethane modified epoxy grind resin, charcoal
Black, kaolin, wetting dispersing agent, deionized water, wherein polyurethane modified epoxy grind resin is made by following methods:
A. polyol compound is heated into decompression dehydration at 110 DEG C first, then in nitrogen atmosphere, polyisocyanate cyanogen is added dropwise
Ester compound reacts 2-3h at 50-80 DEG C, generates hydroxyl-terminated polyurethane performed polymer；
B. base epoxy resin, chain extender, above-mentioned hydroxyl-terminated polyurethane performed polymer, toluene class or ketones solvent and triphen
Base phosphine is heated up in the reaction vessel after chain extension, and chain extending reaction is carried out between 130-170 DEG C, and obtaining epoxide equivalent is 800-1000
Epoxy resin；
C. in the epoxy resin that epoxide equivalent is 800-1000, it is warming up to 75-80 DEG C under constant stirring, is added amine-containing
The corrective of compound and neutralizer is warming up to 75-80 DEG C, is made after then keeping the temperature 5 hours.
Wherein, the polyol compound is at least one of polyether polyol, polyester polyol.
Wherein, the polyisocyanate compound is toluene di-isocyanate(TDI), hexamethylene diisocyanate, isophorone
At least one of diisocyanate, methyl diphenylene diisocyanate.
Wherein, the base epoxy resin is bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol S type epoxy tree
At least one of rouge, linear phenolic epoxy resin.
Wherein, the chain extender is at least one of bisphenol-A and its derivative.
Wherein, the first benzene kind solvent is at least one of toluene, dimethylbenzene；Ketones solvent is acetone, butanone, methyl
At least one of isobutyl ketone.
Wherein, the amine-containing compound is unitary tertiary amine.
Wherein, the neutralizer is organic acid or at least one of inorganic acid and its derivative.
A kind of the advantages of electrophoretic coating mill base improving wearability of the present invention are as follows:
(1) mill base grind resin uses polyurethane modified epoxy resin, can effectively improve the wearability of coating；
(2) polyurethane-modified epoxy resin, suitably provides toughening effect；
(3) polyurethane-modified epoxy resin provides ehter bond, ester bond, amino ester bond energy and effectively improves stability of pigment paste.
Specific embodiment
The first step carries out the preparation of hydroxyl-terminated polyurethane performed polymer:
Table 1
It is ready in the three-necked flask equipped with thermometer, blender, is added according to formula ratio as shown in Table 1 above
Diglycol, heat temperature raising are opened stirring, are vacuumized, and are dehydrated under the conditions of 105-110 DEG C, vacuum degree 133.3Pa, dehydration
After be cooled to 50 DEG C and saved backup hereinafter, being put into dry closed container.In dry three-necked flask, lead to nitrogen,
Methyl diphenylene diisocyanate is added according to formula ratio as shown in Table 1, above-mentioned diglycol is then added dropwise thereto,
Then in 70-80 DEG C of heat preservation 2h, base polyurethane prepolymer for use as is obtained；
Second step carries out the preparation of polyurethane modified epoxy resin:
Table 2
In the reaction flask equipped with thermometer, blender and reflux condensing tube, formula as shown in Table 2 above is sequentially added
E51 epoxy resin, bisphenol A type epoxy resin, the base polyurethane prepolymer for use as and methyl iso-butyl ketone (MIBK) in the first step of amount.Charging finishes
Afterwards, it starts and stirs and keep the temperature after reaction system is warming up to 120 DEG C, be added after dimethyl benzylamine and temperature is risen to 150 DEG C, and
The reaction was continued at a temperature of this, and 2h starts to be cooled to 100 DEG C when reaction system epoxide equivalent reaches theoretical value (EEW=845)；
Third step carries out the preparation of polyurethane modified epoxy grind resin:
Table 3
Formula ratio as shown in Table 3 above is added in the reaction flask equipped with thermometer, blender and reflux condensing tube
Then the polyurethane modified epoxy in second step is added in dimethylethanolamine, lactic acid and deionized water, 40-50 DEG C of stirring 30min
Resin, 75-80 DEG C keeps the temperature 5 hours, cooling discharge；
4th step carries out the preparation of mill base:
Table 4
By grinding 2 hours is carried out after the dispersion of middle formula dispersion machine shown in above-mentioned table 4, fineness < 15um obtains black wash.
Carry out the preparation of electrophoretic coating:
Table 5
Electrophoretic coating A is made according to the cooperation of raw material shown in above-mentioned table 5, is subsequently placed in electrophoresis tank and cures 24 hours.Slot
Liquid temperature under the conditions of 32 DEG C, control voltage 200V, electrophoresis 30 seconds.Then at 200 DEG C bake 20 minutes, obtain paint film appearance compared with
Good paint film.
To carrying out wear-resisting test, the result of test such as the following table 6 institute after electrophoretic coating A slot allocation and common coating slot allocation electrophoresis
Show.
6 coating A of table, common coating wearability
The above is only preferred embodiment of the invention, it is noted that those skilled in the art, not
Under the premise of being detached from the invention design, some similar deformation and improvement can be made, these also should be regarded as the present invention
Protection scope within.
Claims (8)
1. a kind of electrophoretic coating mill base for improving wearability, which is characterized in that including polyurethane modified epoxy grind resin, charcoal
Black, kaolin, wetting dispersing agent, deionized water, wherein polyurethane modified epoxy grind resin is made by following methods:
A. polyol compound is heated into decompression dehydration at 110 DEG C first, then in nitrogen atmosphere, polyisocyanates is added dropwise
Compound reacts 2-3h at 50-80 DEG C, generates hydroxyl-terminated polyurethane performed polymer；
B. base epoxy resin, chain extender, hydroxyl-terminated polyurethane performed polymer, toluene class or ketones solvent and triphenylphosphine are reacting
It is heated up after chain extension in container, chain extending reaction is carried out between 130-170 DEG C, obtain the asphalt mixtures modified by epoxy resin that epoxide equivalent is 800-1000
Rouge；
C. in the epoxy resin that epoxide equivalent is 800-1000, it is warming up to 75-80 DEG C under constant stirring, is added and contains amine compounds
The corrective of object and neutralizer is warming up to 75-80 DEG C, is made after then keeping the temperature 5 hours.
2. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the polynary alcoholization
Conjunction object is at least one of polyether polyol, polyester polyol.
3. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the polyisocyanic acid
Ester compounds are that toluene di-isocyanate(TDI), hexamethylene diisocyanate, isophorone diisocyanate, diphenyl methane two are different
At least one of cyanate.
4. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the basis epoxy
Resin is bisphenol A type epoxy resin, in bisphenol f type epoxy resin, bisphenol-s epoxy resin, linear phenolic epoxy resin numerical value
At least one.
5. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the chain extender is
At least one of bisphenol-A and its derivative.
6. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the toluene class is molten
Agent is at least one of toluene, dimethylbenzene；Ketones solvent is at least one of acetone, butanone, methyl iso-butyl ketone (MIBK).
7. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that described to contain amine compounds
Object is unitary tertiary amine.
8. a kind of electrophoretic coating mill base for improving wearability according to claim 1, which is characterized in that the neutralizer is
Organic acid or at least one of inorganic acid and its derivative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810798363.2A CN109111793A (en) | 2018-07-19 | 2018-07-19 | A kind of electrophoretic coating mill base improving wearability |
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| CN201810798363.2A CN109111793A (en) | 2018-07-19 | 2018-07-19 | A kind of electrophoretic coating mill base improving wearability |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746609A (en) * | 2019-09-17 | 2020-02-04 | 浩力森化学科技（江苏）有限公司 | Electrophoretic paint color paste, modified epoxy grinding resin and preparation method |
| CN112266687A (en) * | 2020-10-29 | 2021-01-26 | 浩力森化学科技（江苏）有限公司 | Preparation method of quaternary ammonium salt type grinding resin and grinding-free cationic color electrophoresis paste |
| CN114106633A (en) * | 2021-11-26 | 2022-03-01 | 广州优达涂料有限公司 | Infrared reflection color paste and preparation method thereof, infrared reflection electrophoretic paint and application thereof |
| CN115895324A (en) * | 2022-06-08 | 2023-04-04 | 浩力森化学科技（江苏）有限公司 | Stone-impact-resistant electrophoretic coating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746609A (en) * | 2019-09-17 | 2020-02-04 | 浩力森化学科技（江苏）有限公司 | Electrophoretic paint color paste, modified epoxy grinding resin and preparation method |
| CN112266687A (en) * | 2020-10-29 | 2021-01-26 | 浩力森化学科技（江苏）有限公司 | Preparation method of quaternary ammonium salt type grinding resin and grinding-free cationic color electrophoresis paste |
| CN114106633A (en) * | 2021-11-26 | 2022-03-01 | 广州优达涂料有限公司 | Infrared reflection color paste and preparation method thereof, infrared reflection electrophoretic paint and application thereof |
| CN114106633B (en) * | 2021-11-26 | 2023-12-22 | 广州优达涂料有限公司 | Infrared reflection color paste, preparation method and infrared reflection electrophoretic paint and application thereof |
| CN115895324A (en) * | 2022-06-08 | 2023-04-04 | 浩力森化学科技（江苏）有限公司 | Stone-impact-resistant electrophoretic coating |
| CN115895324B (en) * | 2022-06-08 | 2024-01-30 | 浩力森化学科技（江苏）有限公司 | Stone-strike resistant electrophoretic paint |
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