CN101368057B - High-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint - Google Patents
High-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint Download PDFInfo
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Abstract
The invention discloses a high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint, which comprises aqueous cation epoxide resin, pigments and fillers, innoxious drier, dispersant, emulsifying agent, acid and so on. The thermostability and the breakdown voltage of the tank liquor involved in the invention are high; the content of working solvents is low; the tank liquor is friendly to the environment and energy-saving. The high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint has the excellent overall properties of salt-mist-resistance, chemical resistance, alkali resistance, and water resistance of cathode electrophoretic paint. The high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint can be widely applied as bottom anticorrosion painting in the metal anticorrosion industries of automobiles, components and fittings, engineering machinery, farm trucks, motorcycles, hardware, white goods and so on, which can be manufactured into transparent and chromatic cathode electrophoretic paints meeting the requirement for primer-topcoat coating of white goods, indoor hardware and so on.
Description
Technical field
The present invention relates to Chemicals and preparation method field, particularly a kind of bi-component epoxy-polyurethane cathode electrophoretic paint.
Background technology
Epoxy-polyurethane two-pack cathode electrophoresis dope is at present at painting dressing automobiles, and industries such as agricultural vehicle, motorcycle, engineering machinery, household electrical appliance, five metals have been used widely, and have replaced the anode coating process substantially.Along with the top large-scale coatings enterprises in the world such as U.S. PPG company, German BASF AG.Japan's Northwest coating has been set up individual proprietorship or joint venture in succession in China, also promoted the technical progress of domestic anode electrophoresis dope and application greatly, but still there is a certain distance in China's cathode electrophoresis dope technology and world standard.Cathode electrophoresis dope is with its utilization efficiency of coatings height, the film performance excellence, and safety, environmental protection is fit to numerous advantages such as industrial automation production and is used widely, and is not described further at this piece of writing.
The present cathode electrophoresis dope technology of China mainly shows following several aspect with the gap of external advanced level:
(1) tank liquor thermostability and advanced level gap are big.The independently developed electrophoretic paint tank liquor temperature of China generally all is controlled at below 30 ℃ at present, surpasses 30 ℃ of electrodeposited paint film plumpnesses, and the Stability of Bath Solution extreme difference.And U.S. PPG company ability cathode electrophoresis paint bath temperature 35 ℃ still stable and under this temperature electrodeposited paint film even.
(2) domestic cathode electrodip painting tank liquor breakdown potential is forced down, and general film-type voltage breakdown is at 280V-320V, even middle thick film is also only about 350V.And international most advanced level has up to more than the 600V.The throwing power sign electrocoating paint of electrocoating paint is to the size of the coating ability of complex part inner chamber, and the height voltage that breaks indicates that to a great extent it is by force the throwing power height that electrocoating paint applies ability to the complex part inner chamber.
(3) domestic electrocoating paint hopper liquid solvent is generally between 2-6%, and international most advanced level reaches≤and 1.5%.
Summary of the invention
For solving or improving the problems referred to above, the purpose of this invention is to provide a kind of high-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint, the thermostability height of its tank liquor, voltage breakdown height, the low and more environmental protection of work solvent.
The object of the present invention is achieved like this: a kind of high-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint, it is characterized in that: it is composed of the following components to calculate tank liquor by mass parts: 1 part of water dispersible mill base, emulsion 2-3 part, deionized water 3-4 part; Described water dispersible mill base is by waterborne cation Resins, epoxy 20-40 part, color stuffing 10-40 part, solvent 10-20 part, nontoxic siccative 0.5-1.5 part, dispersion agent 0.5-2 part, deionized water 20-50 part; Described emulsion is by waterborne cation Resins, epoxy 40-60 part, nontoxic siccative 0.5-1 part, and solvent 0.5-5 part, emulsifying agent 0.1-2 part, sour 0.1-2 part, deionized water 30-50 part is formed.
Waterborne cation Resins, epoxy calculates by mass parts, and prescription comprises following component: modified epoxy 50-70 part, type semienclosed and/or blocked polyurethane curing agent 10-30 part, neutralizing agent 5-30 part, deionized water 5-20 part.
Described modified epoxy calculates by mass parts, and prescription comprises following component: pure ethers and ketones solvent 10-30 part, Resins, epoxy 20-35 part, aliphatic amide 0.5-2 part, ketoimine resin 10-25 part.Ketoimine resin wherein calculates by mass parts, and prescription comprises following component: polyetheramine or polyamide 6 0-80 part, butanone or methyl iso-butyl ketone (MIBK) 20-40 part.
Described semiclosed or blocked polyurethane curing agent calculates by mass parts, prescription comprises following component: aromatic polyisocyanate 5-20 part, alcohol ether compound, heterocyclic compound one of them or two or more mixing 3-30 part, polyethers or PCDL 0-80 part, ketones solvent 0-40 part.
The preparation method of above-mentioned emulsion, its feature may further comprise the steps: disperse cylinder A at 900-1500 rev/min of following high speed dispersion 1-2 hour waterborne cation Resins, epoxy, nontoxic siccative, innoxious solvent input; Simultaneously deionized water, acid, emulsifying agent were dropped into the B cylinder at 1100-1500 rev/min of following high speed dispersion 10-40 minute; Thereafter under 1300-1500 rev/min, A cylinder mixture slowly is added drop-wise in the B cylinder, drips and finish the thick emulsion components that under this rotating speed, continues to disperse promptly to get in 1-2 hour.
The preparation method of above-mentioned mill base component, may further comprise the steps: waterborne cation Resins, epoxy, color stuffing, non-ionic dispersing agent, solvent, deionized water, siccative are dropped into dispersion pot, leave standstill more than 8 hours after the dispersion down at 700-1100 rev/min, disperse to advance sand mill in 20-40 minute down at 600-800 rev/min again and grind, to fineness≤15 μ.
The invention has the advantages that the advantage of having concentrated the existing many cathode electrophoresis dopes in market is as the thermostability height of tank liquor (the tank liquor electrophoresis temperature is between 35-38 ℃); Tank liquor voltage breakdown height (voltage breakdown 〉=380V); Tank liquor work solvent low (solvent is lower than at 1.5% o'clock, does not influence electrophoresis); Electrocoating paint does not contain any noxious solvent such as ethylene glycol monomethyl ether, ethylene glycol ethyl ether aspect environmental protection, glycol ethers content is extremely low, and electrocoating paint is not leaded, tin class siccative and toxic heavy metal; 150 ℃ of drying-types are more energy-conservation than 175 ℃ of drying-type electrocoating paints, and the salt spray resistance of cathode electrodip painting, chemicals-resistant, excellent comprehensive performance universal succession in product of the present invention such as alkaline-resisting, water-fast.The present invention can be widely used in the bottom anticorrosive coating of anti-corrosion of metal industries such as automobile and spare and accessory parts, engineering machinery, agricultural vehicle, motorcycle, five metals, household electrical appliance, also can be satisfying to require aspect the bottom surfaces unification applications such as household electrical appliance, indoor five metals and make transparent color and color cathode electrophoretic paint.
Embodiment
Electrophoretic paint is the water-borne coatings kind of developing the earliest, and with other water-borne coatings ratios, the tank liquor solvent is low, helps environmental protection, and security is good, and electrophoresis wet film solvent still less, is not easy to produce disadvantages such as sagging orange peel, long-pending lacquer in drying course; The antiseptic power of filming is strong, and the cathode electrophoresis dope of especially high throwing power has significant raising to the rotproofness at the inner chamber of workpiece, weld seam, edge; Utilization efficiency of coatings is high, and electrophoretic painting can be realized mechanize, automatization fully in addition, raises labour productivity greatly; Temperature is dried electrophoretic paint than 175 ℃ of high bake electrophoretic paints in 150 ℃, but save energy reduces loss on heating.
The present invention is a kind of high-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint, it is characterized in that: it is composed of the following components to calculate tank liquor by mass parts: 1 part of water dispersible mill base, emulsion 2-3 part, deionized water 3-4 part.
Described water dispersible mill base is by waterborne cation Resins, epoxy 20-40 part, color stuffing 10-40 part, solvent 10-20 part, nontoxic siccative 0.5-1.5 part, dispersion agent 0.5-2 part, deionized water 20-50 part.
Described emulsion is by waterborne cation Resins, epoxy 40-60 part, nontoxic siccative 0.5-1 part, and solvent 0.5-5 part, emulsifying agent 0.1-2 part, sour 0.1-2 part, deionized water 30-50 part is formed.
Waterborne cation Resins, epoxy calculates by mass parts, and prescription comprises following component: modified epoxy 50-70 part, type semienclosed and/or blocked polyurethane curing agent 10-30 part, neutralizing agent 5-30 part, deionized water 5-20 part.Neutralizing agent, acid are organic acid, preferable formic acid, acetate, propionic acid, lactic acid, the aqueous solution of oxalic acid etc.Modified epoxy calculates by mass parts, and prescription comprises following component: pure ethers and ketones solvent 10-30 part, Resins, epoxy 20-35 part, aliphatic amide 0.5-2 part, ketoimine resin 10-25 part.Wherein, pure ethers and ketones solvent can be propylene glycol first/second/butyl ether, 2-hydroxyl first/second/butyl ether, phenylcarbinol, dipropylene glycol methyl ether, butanols, Virahol, butanone, ring ethyl ketone, methyl iso-butyl ketone (MIBK); Resins, epoxy can be that epoxy equivalent (weight) is the bisphenol A type epoxy resin between the 180-1000, phenol aldehyde modified Resins, epoxy; The amine value of polymeric amide is between 80-380; The molecular weight of polyetheramine is between 1000-3000.Semiclosed or blocked polyurethane curing agent calculates by mass parts, prescription comprises following component: aromatic polyisocyanate 5-20 part, alcohol ether compound, heterocyclic compound one of them or two or more mixing 3-30 part, polyethers or PCDL 0-80 part, ketones solvent 0-40 part.Wherein, aromatic polyisocyanate can be TDI, MDI; The alcohol ether compound can be butyl glycol ether, Diethylene Glycol first/second/butyl ether, 2-hydroxyl first/second/butyl ether, propylene glycol first/second/butyl ether; Heterocyclic compound can be N-methylpyrrole alkanol, tetrahydrofurfuryl alcohol, methyl ethyl diketone, methyl aceto acetate etc.; Polyethers can be polypropylene glycol ether, the polyglycol ether of molecular weight between 400-3000, or admixtured polyether; The molecular weight of PCDL is between 1000-3000; Aliphatic amide can be Mono Methyl Ethanol Amine, dimethylethanolamine, diethylamine, diethanolamine, trolamine, dipropyl amine, Di-n-Butyl Amine; Ketones solvent can be butanone, ring ethyl ketone, methyl iso-butyl ketone (MIBK).
Pigment can be titanium dioxide, carbon black, red iron oxide, process white, water-washed kaoline etc.
Nontoxic siccative is various bismuth salt, rare earth drier, cobalt salt siccative.
Dispersion agent is non-ionic dispersing agent or cationic dispersing agent.
The preparation method of above-mentioned emulsion, its feature may further comprise the steps: disperse cylinder A at 900-1500 rev/min of following high speed dispersion 1-2 hour waterborne cation Resins, epoxy, nontoxic siccative, innoxious solvent input; Simultaneously deionized water, acid, emulsifying agent were dropped into the B cylinder at 1100-1500 rev/min of following high speed dispersion 10-40 minute; Thereafter under 1300-1500 rev/min, A cylinder mixture slowly is added drop-wise in the B cylinder, drips and finish the thick emulsion components that under this rotating speed, continues to disperse promptly to get in 1-2 hour.
The preparation method of above-mentioned mill base component, may further comprise the steps: waterborne cation Resins, epoxy, color stuffing, non-ionic dispersing agent, solvent, deionized water, siccative are dropped into dispersion pot, leave standstill more than 8 hours after the dispersion down at 700-1100 rev/min, disperse to advance sand mill in 20-40 minute down at 600-800 rev/min again and grind, to fineness≤15 μ.
The preparation method of above-mentioned waterborne cation Resins, epoxy, its feature may further comprise the steps:
(1) preparation of modified epoxy: with Resins, epoxy 20-35 part, pure ethers, ketones solvent 10-30 part input reactor add aliphatic amide 0.5-2 part 50 ℃ of-80 ℃ of following stirring and dissolving and reacted 2-3 hour down at 80 ℃-90 ℃ after 1 hour; After reaction is finished, drip 10-25 part ketoimine resin down at 75 ℃-90 ℃ and go into reactor and be incubated 1.5-2.5 hour, get modified epoxy;
(2) preparation of solidifying agent: aromatic polyisocyanate 5-20 part is dropped into reactor, add in batches or drip pure ethers monohydroxy compound or heterocyclic hydroxy-containing compounds 3-30 part at 20-50 ℃, polyethers or PCDL 0-80 part (if PCDL or polyethers need in advance through dissolution with solvents); Thereafter be warming up to 70 ℃-90 ℃ insulations 1.5-3 hour after 0.5-2 hour again 30-80 ℃ of insulation, solubilizing agent 0-40 part promptly gets semiclosed or blocked polyurethane curing agent;
(3) modified epoxy 50-70 part is heated to 70-90 ℃, drips or add semiclosed or blocked curing agent 10-30 part in batches, and add deionized water 5-20 part after 1.5-2.5 hour 70-90 ℃ of insulation 40-80 minute in insulation under this temperature; Thereafter being cooled to 25-70 ℃ adds neutralizing agent 5-30 part and stirs and hour promptly to get waterborne cation Resins, epoxy half an hour to 1.
Embodiment 1
76 parts of TDI are dropped into reactors, open and stir and, be warming up to 80 ℃ of insulations 2 hours again, promptly get semiclosed polyurethane curing agent add 46 parts of tetrahydrofurfuryl alcohols below 50 ℃ in batches 50 ℃ of insulation half an hour.
Embodiment 2
In reactor, drop into 33.4 parts of methyl ethyl diketones, TDI55.3 part, 1 part of dimethylethanolamine, 80 parts of solvent butanone, heated and stirred is warming up to 85 ℃ of reactions in insulation under 70 ℃ and promptly got blocked polyurethane curing agent in 4 hours after 30 minutes.
Embodiment 3
To gather 25 parts of input reactors of semiclosed solidifying agent that 110 parts of carbon ester dibasic alcohol (molecular weight 2000), 15 parts of butanone solvents, embodiment 1 make, open to stir and be warming up to 120 ℃ of reactions after 2 hours, be cooled to 80 ℃, drip TDI10 part, be warming up to 110 ℃ of insulations after dripping off and promptly got semi-enclosed polyurethane curing agent in 1 hour.
Embodiment 4
81 parts of E20 Resins, epoxy, 39.4 parts of propylene glycol monomethyl ethers, 19.8 parts of input reactors of butanone were dissolved 1 hour 50 ℃-80 ℃ following heated and stirred; Add 19.7 parts of 2.2 parts of dimethylethanolamines, 9.1 parts of diethanolamine, Virahol afterwards 80 ℃-85 ℃ insulations 2 hours; Drip 49.2 parts in ketoimine mixture (this ketoimine mixture is 2000 2.8 parts of polyetheramines by the molecular weight with butanone sealing and is that 300 polyamide is formed for 46.4 parts with the amine value of methyl iso-butyl ketone (MIBK) sealing) then and 85 ℃ of insulations after 1 hour down, be warming up to 90 ℃ of insulations 2 hours again, promptly get modified epoxy.
Embodiment 5
17.6 parts in the semiclosed solidifying agent that 80 parts of input reactors of modified epoxy that embodiment 4 is made make at 75 ℃ of-80 ℃ of following agitation and dropping embodiment 1, then add 11.3 parts of the blocked polyurethane curing agents that embodiment 2 makes in three batches, and 80 ℃ down insulation add water after 2 hours and continue insulation 1 hour for 6 parts, cool to and add neutralizing agent below 50 ℃ and stir for 6 parts and promptly got the cationic water epoxy resin in 30 minutes.
Embodiment 6
32.6 parts of waterborne cation Resins, epoxy, 15.4 parts of 1250 order calcined kaolins, 1.1 parts of high-carbon black pigments, 0.7 part of non-ionic dispersing agent, 6 parts of propylene glycol monomethyl ethers, 7.8 parts of Virahols, 38.6 parts of deionized waters, organo-bismuth siccative are dropped into dispersion pot for 0.76 part, after disperseing 1 hour under 700-1100 rev/min, left standstill 8 hours, disperseing to advance sand mill in 30 minutes down at 700 rev/mins again grinds, to fineness≤15 μ be qualified packing, electrophoretic paint mill base component.
Embodiment 7
123.4 parts of waterborne cation Resins, epoxy, 1.8 parts of propylene glycol monomethyl ethers, rare earth drier are dropped into dispersion cylinder A for 7.1 parts to be disperseed 1.5 hours down at 1300 rev/mins; In disperseing cylinder B, drop into simultaneously 131.5 parts of deionized waters, 2 parts of 20% acetic acid, 2.8 parts of 20% nonionic emulsifying agents, 1500 rev/mins of following high speed dispersion 30 minutes; Under 1500 rev/mins of high speed dispersion with A cylinder material with slowly evenly adding the B cylinder in 1.5 hours; Material adds the two-pack cathode electrophoresis dope is continued to disperse promptly to get in 1.5 hours in the back under this rotating speed another component---emulsion.
Embodiment 8
In clean electrophoresis chamber, drop into 2 parts of ionized waters, start the circulation mixing pump, and in groove, drop into 1.5 parts of emulsions, continue circulation; In the premix groove, drop into 1.5 parts of emulsions and start stirring, under agitation slowly drop into 1.5 parts of mill bases, stir and slowly evenly squeezed in the electrophoresis chamber premix groove mixed solution afterwards in 30 minutes; The water of throwing again after 2 parts of washed with de-ionized water premix grooves also will clean slowly evenly pumps into electrophoresis chamber.The tank liquor thermalization can work be carried out the workpiece electrophoretic painting after 48 hours in constantly circulating.
Detected result
One, former lacquer index
| Project | The mill base component | Measured value | Emulsion components | Measured value | Detection method |
| Outward appearance | Grey, the layering of nothing caking | There is not the caking layering | Oyster white | Oyster white | Range estimation |
| Fineness μ m | ≤15 | ≤15 | — | — | GB/T1742 |
| Admittedly contain % | Ash 50 ± 2% black 41 ± 2% | 52.3 | 35±2％ | 34.5 | GB/T6751 |
| The pH value | 5.4±0.3 | 5.3 | 6.7±0.3 | 6.71 | PH meter |
| Specific conductivity us/cm | 1200±300 | 1370 | 900±300 | 952 | HB/T3335 |
Two, tank liquor performance
| Project | Design load | Measured value | Detection method |
| Solids content % | 19±1％ | 20.48 | GB/T6751 |
| The pH value | 6.5±0.3 | 6.35 | PH meter |
| Specific conductivity us/cm | 1000±300 | 1139 | HG/T3335 |
| Ash % | The black 0.95-2.09 of ash 3.42-4.56 | 4.3 | GB/T1747 |
| Solvent | ≤1.5 | Do not survey | Gas-chromatography |
| The MEQ value | 30±4 | Do not survey | A4 in the TB/T10242 appendix A |
| Throwing power % | ≥85 | Do not survey | A10 in the TB/T10242 appendix A |
| The storehouse colour efficiency | ≥25 | Do not survey | HG/T3337 |
| Voltage V breaks | ≥380 | >380 | A3 in the TB/T10242 appendix A |
| The L effect | Horizontal vertical and do not have significant difference | Indifference | A6 in the TB/T10242 appendix A |
| Dissolution rate % again | ≤10 | 8 | A2 in the TB/T10242 appendix A |
Three, film performance
| Index name | Design load | Measured value | Detection method |
| Outward appearance | Smooth smooth, no shrinkage cavity | Smooth smooth, no shrinkage cavity | Range estimation |
| Voltage thickness V/um | 280-330/(21±2) | 300/19 | — |
| Gloss 60% | ≥60 | 75 | GB/T9754 |
| Shock strength Kgcm | 50 | Qualified | GB/T1732 |
| Cupping mm | ≥5 | 6.8 | GB/T9753 |
| Sticking power level (1mm * 1mm, 100/100) | 0 | 0 | GB/T9286 |
| Pencil hardness | H | 2H | GB/T6739 |
| Snappiness (mm) | 1 | 1 | GB/T1731 |
| Alkali resistance (5%) | ≥48h | >120h | GB/T1763 |
| Acid resistance (0.05mol) | ≥48h | Qualified | GB/T1763 |
| Water tolerance (40 ℃) | 360h | Qualified | GB-5209 |
| (3%) 25 ℃ of salt water resistance | 360h | Qualified | GB-1763 |
| Salt-fog test phosphatization plate 21 ± 2 μ | 800h | Qualified | GB/T1771 |
| Anti-gasoline (93#) | 48h | >240h | GB/T1734 |
Advantage of the present invention is as follows:
(1) the thermostability height of tank liquor, the tank liquor electrophoresis temperature is between 35-38 ℃;
(2) height of voltage breakdown reflects electrophoretic paint to the ability of filming of workpiece lumen height, i.e. permeability ratio height, so high-breakdown-voltage proves the high-performance of lacquer from the side, and tank liquor voltage breakdown 〉=380V of the present invention (35-38 ℃);
(3) tank liquor work solvent is lower than at 1.5% o'clock, still can the electrophoresis qualified product, and solvent is low to be one of electrophoretic paint developing direction;
(4) do not contain any noxious solvent such as ethylene glycol monomethyl ether, ethylene glycol ethyl ether, gylcol ether content is extremely low, and simultaneously not leaded, tin class siccative and toxic heavy metal belong to environmentally friendly;
(5) solidification value be 150 ℃ have than common 175 ℃ of drying-type ratios energy-conservation, the low advantage such as hot driving that adds;
(6) find that by making sheet this product is good to application workpiece corner covering power;
(7) owing to be middle low-temperature bake, paint film toasts nondiscoloration, and therefore xanthochromia not can be used as light electrophoretic painting.
Claims (6)
1. a high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint is characterized in that, it is composed of the following components to calculate tank liquor by mass parts: 1 part of water dispersible mill base, emulsion 2-3 part, deionized water 3-4 part;
Described water dispersible paste formula is by waterborne cation Resins, epoxy 20-40 part, color stuffing 10-40 part, and solvent 10-20 part, nontoxic siccative 0.5-1.5 part, dispersion agent 0.5-2 part, deionized water 20-50 part is formed;
Described emulsion formulations is by waterborne cation Resins, epoxy 40-60 part, nontoxic siccative 0.5-1 part, and solvent 0.5-5 part, emulsifying agent 0.1-2 part, sour 0.1-2 part, deionized water 30-50 part is formed;
Described waterborne cation Formulaion of epoxy resin comprises following component: modified epoxy 50-70 part, type semienclosed and/or blocked polyurethane curing agent 10-30 part, neutralizing agent 5-30 part, deionized water 5-20 part;
Described modified epoxy prescription comprises following component: pure ethers and ketones solvent 10-30 part, Resins, epoxy 20-35 part, aliphatic amide 0.5-2 part, ketoimine resin 10-25 part;
Described ketoimine resin formula comprises following component: polyetheramine or polyamide 6 0-80 part, butanone or methyl iso-butyl ketone (MIBK) 20-40 part;
Described type semienclosed and/or blocked polyurethane curing agent prescription comprises following component: aromatic polyisocyanate 5-20 part, alcohol ether compound, heterocyclic compound one of them or two or more mixing 3-30 part, polyethers or PCDL 0-80 part, ketones solvent 0-40 part.
2. high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint according to claim 1 is characterized in that: described acid, neutralizing agent are organic acid.
3. high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint according to claim 1 is characterized in that: described nontoxic siccative is bismuth salt siccative, rare earth drier or bores the salt siccative; Described dispersion agent is non-ionic dispersing agent or cationic dispersing agent.
4. high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint according to claim 1, it is characterized in that the preparation method of described emulsion may further comprise the steps: disperse cylinder A at 900-1500 rev/min of following high speed dispersion 1-2 hour waterborne cation Resins, epoxy, nontoxic siccative, solvent input; Simultaneously deionized water, acid, emulsifying agent were dropped into the B cylinder at 1100-1500 rev/min of following high speed dispersion 10-40 minute; Thereafter under 1300-1500 rev/min, A cylinder mixture slowly is added drop-wise in the B cylinder, drips the end back and under this rotating speed, continue to disperse 1-2 hour, promptly get emulsion components.
5. high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint according to claim 1, it is characterized in that, the preparation method of described water dispersible mill base may further comprise the steps: waterborne cation Resins, epoxy, color stuffing, dispersion agent, solvent, deionized water, nontoxic siccative are dropped into dispersion pot, leave standstill more than 8 hours after the dispersion down at 700-1100 rev/min, disperseed 20-40 minute down at 600-800 rev/min again, advance sand mill and be ground to fineness≤15 μ m.
6. high-performance 150 DEG C oven dry type two component epoxy-polyurethane cathode electrophoretic paint according to claim 1 is characterized in that, the preparation method of described waterborne cation Resins, epoxy may further comprise the steps:
(1) preparation of modified epoxy: with Resins, epoxy 20-35 part, pure ethers and ketones solvent 10-30 part are dropped into reactor, add aliphatic amide 0.5-2 part after 50 ℃ of-80 ℃ of following stirring and dissolving, react 2-3 hour down at 80 ℃-90 ℃; After reaction is finished, drip 10-25 part ketoimine resin down at 75 ℃-90 ℃ and go into reactor and be incubated 1.5-2.5 hour, promptly get modified epoxy;
(2) preparation of solidifying agent: aromatic polyisocyanate 5-20 part is dropped into reactor, add in batches or drip pure ether compound or heterocyclic compound 3-30 part at 20-50 ℃, polyethers or PCDL 0-80 part; Thereafter be warming up to 70 ℃-90 ℃ insulations 1.5-3 hour after 0.5-2 hour again 30-80 ℃ of insulation, add ketones solvent 0-40 part, promptly get type semienclosed and/or blocked polyurethane curing agent; Wherein, described pure ether compound is pure ethers monohydroxy compound, and described heterocyclic compound is the heterocyclic hydroxy-containing compounds;
(3) modified epoxy 50-70 part is heated to 75-85 ℃, drip or add type semienclosed and/or blocked polyurethane curing agent 10-30 part in batches, and after being incubated 1.5-2.5 hour under this temperature, add deionized water 5-20 part, 70-90 ℃ of insulation 40-80 minute; Thereafter be cooled to 25-70 ℃ and add neutralizing agent 5-30 part, stirred 0.5-1 hour, promptly get waterborne cation Resins, epoxy.
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Application publication date: 20090218 Assignee: Guangdong Kodest Chemical Industry Co., Ltd. Assignor: Jiang Zeping|Chen Qinbin Contract record no.: 2012440000642 Denomination of invention: High-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint Granted publication date: 20110914 License type: Exclusive License Record date: 20121206 |
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