CN109280475A - Polyurethane electrophoretic coating - Google Patents
Polyurethane electrophoretic coating Download PDFInfo
- Publication number
- CN109280475A CN109280475A CN201810876141.8A CN201810876141A CN109280475A CN 109280475 A CN109280475 A CN 109280475A CN 201810876141 A CN201810876141 A CN 201810876141A CN 109280475 A CN109280475 A CN 109280475A
- Authority
- CN
- China
- Prior art keywords
- polyurethane
- electrophoretic coating
- glycol
- coating
- reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C09D175/08—Polyurethanes from polyethers
-
- 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
-
- 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
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4419—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 otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
- C09D5/4465—Polyurethanes
Abstract
The present invention relates to polyurethane electrophoretic coatings, matrix resin uses polyurethane resin, the polyurethane resin is by the average functionality 2 ~ 5 of a) .10 ~ 40 part molecular weight 400 ~ 15000: polypropylene glycol, polyethylene glycol, EO/PO block polyether polyol, EO/PO blending feed intake one of polyether polyol, adipate polyester polyalcohol, polycarbonate polyol, polytetrahydrofuran polyol or a variety of, react and are prepared with b) .5 ~ 200 part polyisocyanates.This hair has the following advantages and beneficial effects: (1) type and ratio raw materials used according to polyurethane resin, is capable of the flexibility of any adjusting coating；(2) according to the type for using polyisocyanates, it can make coating that there is excellent weatherability.
Description
[technical field]
The present invention relates to polyurethane electrophoretic coatings.
[background technique]
In recent years, due to environmental pollution increasingly aggravate and continuous reinforcement of the people for environmental consciousness, industrial coating by
Solvent type hydrotropism starts to change.Electrophoretic coating has a series of oil paints and does not have as a member in water paint
The advantages of, such as a large amount of organic solvents are saved, atmosphere pollution is greatly reduced using water as dissolving medium using water soluble paint
And environmental hazard, safety and sanitation, while avoiding the hidden danger of fire；Coating efficiency is high, and paint loss is small, and the utilization rate of coating can
Up to 90%~95%；Coating thickness is uniform, and adhesive force is strong, and coating quality is good, workpiece each position such as internal layer, recess, weld seam etc.
Place can obtain uniform, smooth paint film, solve other coating process to the coating problem of complex-shaped workpieces；Production efficiency
Height constructs and automatic continuous production can be achieved, greatly improves labor efficiency etc..
Conventional electrophoretic coating is divided into epoxy and acrylic acid two major classes, and wherein epoxies electrophoretic coating is excellent anti-due to having
Corruption and adhesive force, the priming paint for being widely used as complicated metal material use.But not due to the flexibility of epoxies electrophoretic coating
Foot, is often unable to satisfy requirement of many industries to coating impact resistance.
[summary of the invention]
The main purpose of the present invention is to provide a kind of electrophoresis coatings using resin based on polyurethane.This electricity
Swimming coating can significantly improve the flexibility of paint film while meeting anti-corrosive properties and adhesive force, while can also take into account acrylic acid
The weather resistance of class electrophoretic coating.
To achieve the goals above, a kind of polyurethane electrophoretic coating is provided, matrix resin uses polyurethane resin, described
Polyurethane resin be by
A) average functionality 2~5 of .10~40 part molecular weight 400~15000: polypropylene glycol, polyethylene glycol, EO/PO
Feed intake polyether polyol, adipate polyester polyalcohol, polycarbonate polyol, poly- tetrahydro is blended in block polyether polyol, EO/PO
One of furan polyols are a variety of, with
B) polyisocyanates reaction in .5~200 part is prepared.
Further above-mentioned electrophoretic coating also has following ingredient:
Including curing agent.
The curing agent is by 10~50 parts of polyisocyanates and 1~100 part of end-capping reagent, and 0.001~5 part of polyurethane is with urging
Agent and appropriate solvent heat up in the reaction vessel, carry out being prepared for reaction 2~15 hours between 40-150 DEG C.
Including mill base and auxiliary agent.
The auxiliary agent is one of levelling agent, wetting agent, dispersing agent, thickener, defoaming agent or a variety of mixtures.
The neutralizer is one or more in low molecule amine or low molecular acid.
Component a heats up in the reaction vessel with component b and solvent, carries out between 40-150 DEG C reaction 2~15 hours,
Then 0.1~10 part of chain extender, 0.001~5 part of polyurethane catalyst is added, continuation carries out reaction 2 between 40-150 DEG C
Polyurethane resin is prepared within~15 hours.
The polyisocyanates are as follows: TDI, TDI tripolymer, any type of MDI, any form MDI tripolymer,
One of HDI, HDI trimer, IPDI, IPDI tripolymer, HMDI or a variety of mixtures.
The chain extender are as follows: ethylene glycol, propylene glycol, butanediol, hexylene glycol, cyclohexanediol, glycerine, trihydroxy methyl third
Alkane, pentaerythrite, mannitol, xylitol, monoethanolamine, methyl-ethanolamine, diethanol amine, methyl diethanolamine, three ethyl alcohol
One of amine, hydroxyethyl ethylenediamine, dihydroxy ethyl ethylenediamine, trihydroxyethyl ethylenediamine, tetrahydroxyethyl-ethylene diamine are a variety of mixed
Close object.
The end-capping reagent are as follows: methanol, ethyl alcohol, isopropanol, n-butanol, glycol monoethyl ether, ethylene glycol monoethyl ether, second two
One of alcohol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, methyl ethyl ketoxime, dimethyl pyrazole are a variety of mixed
Close object.
This hair has the following advantages and beneficial effects:
(1) type and ratio raw materials used according to polyurethane resin are capable of the flexibility of any adjusting coating；
(2) according to the type for using polyisocyanates, it can make coating that there is excellent weatherability.
[specific embodiment]
For ease of further understanding the present invention, the following example elaborates details particularly, but implementation of the invention
Mode is without being limited thereto.
Embodiment 1
1) electrophoretic coating polyurethane resin
Equipped with thermometer, blender and reflux condensing tube reaction flask in, sequentially add formula ratio PPG1000,
MDI, organotin T12, methyl iso-butyl ketone (MIBK), heating stirring is reacted at 60 DEG C, keeps the temperature 5 hours.Then 30 DEG C are cooled to,
Triethanolamine is added, is heated to 45 DEG C, stirs 2 hours, obtains electrophoretic coating polyurethane resin.
2) electrophoretic coating polyaminoester emulsion is prepared
In equipped with thermometer, blender reaction flask, the above-mentioned substance of formula ratio is sequentially added, is existed using dispersion impeller
Disperse 20 minutes under 1500rpm, obtains electrophoretic coating polyaminoester emulsion.
3) polyurethane electrophoretic coating tank liquor
Above-mentioned substance is added by formula ratio, is dispersed at 800 rpm using dispersion impeller 15 minutes, it is poly- to obtain electrophoretic coating use
Urethane tank liquor.
Embodiment 2
1) electrophoretic coating polyurethane resin
Equipped with thermometer, blender and reflux condensing tube reaction flask in, sequentially add formula ratio EP copolymerization 2000,
IPDI, organotin T12, butanone, heating stirring is reacted at 60 DEG C, keeps the temperature 8 hours.Then 30 DEG C are cooled to, first is added
Base diethanol amine is heated to 45 DEG C, stirs 2 hours, obtains electrophoretic coating polyurethane resin.
2) electrophoretic coating polyaminoester emulsion is prepared
In equipped with thermometer, blender reaction flask, the above-mentioned substance of formula ratio is sequentially added, is existed using dispersion impeller
Disperse 20 minutes under 1500rpm, obtains electrophoretic coating polyaminoester emulsion.
3) polyurethane electrophoretic coating tank liquor
Above-mentioned substance is added by formula ratio, is dispersed at 800 rpm using dispersion impeller 15 minutes, it is poly- to obtain electrophoretic coating use
Urethane tank liquor.
Making sheet test and (the Conventional epoxy electricity of embodiment 3 are carried out to the polyurethane electrophoretic coating that embodiment 1, embodiment 2 obtain
Swimming coating) it compares, film thickness 25-30um, test relevant parameter is shown in Table 1.
The color inhibition comparison of 1 embodiment 1 of table, 3 coating of embodiment 2 and embodiment
(1) add value of chromatism (2) paint film impact test instrument (3) cross-cut tester method of roasting 180 DEG C of 1h
As seen from the data in Table 1, polyurethane electrophoretic coating possesses outstanding flexibility while having excellent salt fog resistance,
And use the polyurethane of IPDI more for good weatherability.It is obviously high using the performance of polyurethane system in electrophoretic coating
In epoxy systems.
The foregoing is merely highly preferred embodiment of the present invention, are not used in the limitation present invention.The technical staff of this neighborhood according to
Announcement of the invention, the modification made for the present invention all should be within the scope of the present invention.
Claims (10)
1. a kind of polyurethane electrophoretic coating, it is characterised in that matrix resin uses polyurethane resin, and the polyurethane resin is
By
A) average functionality 2 ~ 5 of .10 ~ 40 part molecular weight 400 ~ 15000: polypropylene glycol, polyethylene glycol, EO/PO block are poly-
Ethoxylated polyhydric alcohol, feed intake polyether polyol, adipate polyester polyalcohol, polycarbonate polyol, polytetrahydrofuran of EO/PO blending are more
One of first alcohol is a variety of, with
B) polyisocyanates reaction in .5 ~ 200 part is prepared.
2. polyurethane electrophoretic coating as described in claim 1, it is characterised in that including curing agent.
3. polyurethane electrophoretic coating as claimed in claim 2, it is characterised in that the curing agent is by 10 ~ 50 parts of polyisocyanic acid
Ester and 1 ~ 100 part of end-capping reagent, 0.001 ~ 5 part of polyurethane catalyst and appropriate solvent heat up in the reaction vessel, in 40-
It carries out being prepared for reaction 2 ~ 15 hours between 150 DEG C.
4. polyurethane electrophoretic coating as claimed in claim 1 or 2, it is characterised in that including mill base and auxiliary agent.
5. polyurethane electrophoretic coating as claimed in claim 4, it is characterised in that the auxiliary agent is levelling agent, wetting agent, divides
One or more of powder, thickener, defoaming agent scalemic thereof.
6. polyurethane electrophoretic coating as claimed in claim 5, it is characterised in that the neutralizer is low molecule amine or low molecule
It is one or more of in acid.
7. polyurethane electrophoretic coating as described in claim 1, it is characterised in that component a is reacting appearance with component b and solvent
It heats up in device, is carried out between 40-150 DEG C reaction 2 ~ 15 hours, 0.1 ~ 10 part of chain extender, 0.001 ~ 5 part of poly- ammonia is then added
Ester catalyst, continuation carry out polyurethane resin being prepared in reaction 2 ~ 15 hours between 40-150 DEG C.
8. polyurethane electrophoretic coating as described in claim 1, it is characterised in that the polyisocyanates are as follows: TDI, TDI tri-
Aggressiveness, any type of MDI, the tripolymer of any form MDI, HDI, HDI trimer, IPDI, IPDI tripolymer, in HMDI
One or more of mixtures.
9. polyurethane electrophoretic coating as described in claim 1, it is characterised in that the chain extender are as follows: ethylene glycol, propylene glycol, fourth
Glycol, hexylene glycol, cyclohexanediol, glycerine, trimethylolpropane, pentaerythrite, mannitol, xylitol, monoethanolamine, methyl
Monoethanolamine, diethanol amine, methyl diethanolamine, triethanolamine, hydroxyethyl ethylenediamine, dihydroxy ethyl ethylenediamine, trihydroxyethyl
One or more of ethylenediamine, tetrahydroxyethyl-ethylene diamine quality arbitrarily compares mixture.
10. polyurethane electrophoretic coating as described in claim 1, it is characterised in that the end-capping reagent are as follows: methanol, ethyl alcohol, different
Propyl alcohol, n-butanol, glycol monoethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol list
One or more of butyl ether, methyl ethyl ketoxime, dimethyl pyrazole quality arbitrarily compares mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876141.8A CN109280475A (en) | 2018-08-03 | 2018-08-03 | Polyurethane electrophoretic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876141.8A CN109280475A (en) | 2018-08-03 | 2018-08-03 | Polyurethane electrophoretic coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109280475A true CN109280475A (en) | 2019-01-29 |
Family
ID=65182919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810876141.8A Pending CN109280475A (en) | 2018-08-03 | 2018-08-03 | Polyurethane electrophoretic coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109280475A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710002A (en) * | 2005-06-16 | 2005-12-21 | 武汉科利尔化工有限公司 | Water-based polyurethane resin and its electrophoretic paint composition and preparing method |
| CN105504214A (en) * | 2015-12-25 | 2016-04-20 | 武汉科利尔新材料有限公司 | Preparation method of biomass polyurethane electrophoretic resin and electrophoretic paint thereof |
| CN106243316A (en) * | 2016-07-29 | 2016-12-21 | 肇庆浩城树脂科技有限公司 | A kind of aqueous pu dispersions and application thereof |
| CN106634525A (en) * | 2016-10-19 | 2017-05-10 | 东莞市霖辉金属表面处理材料有限公司 | Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material |
| JP2018105863A (en) * | 2016-12-26 | 2018-07-05 | 同方威視技術股▲分▼有限公司 | Neutron-sensitive layer for neutron detection and method of forming the same |
-
2018
- 2018-08-03 CN CN201810876141.8A patent/CN109280475A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710002A (en) * | 2005-06-16 | 2005-12-21 | 武汉科利尔化工有限公司 | Water-based polyurethane resin and its electrophoretic paint composition and preparing method |
| CN105504214A (en) * | 2015-12-25 | 2016-04-20 | 武汉科利尔新材料有限公司 | Preparation method of biomass polyurethane electrophoretic resin and electrophoretic paint thereof |
| CN106243316A (en) * | 2016-07-29 | 2016-12-21 | 肇庆浩城树脂科技有限公司 | A kind of aqueous pu dispersions and application thereof |
| CN106634525A (en) * | 2016-10-19 | 2017-05-10 | 东莞市霖辉金属表面处理材料有限公司 | Polyurethane-acrylate cathodic electrophoretic coating material, preparation method therefor and application of polyurethane-acrylate cathodic electrophoretic coating material |
| JP2018105863A (en) * | 2016-12-26 | 2018-07-05 | 同方威視技術股▲分▼有限公司 | Neutron-sensitive layer for neutron detection and method of forming the same |
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Application publication date: 20190129 |
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