CN105778734A - Method for preparing water-based baking paint - Google Patents
Method for preparing water-based baking paint Download PDFInfo
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- CN105778734A CN105778734A CN201410829941.6A CN201410829941A CN105778734A CN 105778734 A CN105778734 A CN 105778734A CN 201410829941 A CN201410829941 A CN 201410829941A CN 105778734 A CN105778734 A CN 105778734A
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Abstract
The invention discloses a method for preparing water-based baking paint.The method includes the following steps that 1, water-based acrylic-acid modified polyester emulsion is added into water-soluble amino resin to form a film forming base material, then water-soluble aluminum powder is weighed and added into the film forming base material, a neutralizing agent and deionized water are added, and the mixture is ground through a sand mill to obtain a water-based color paste solution; 2, the water-based color paste solution, a dispersing agent and pearlescent pigment are weighed and dispersed to be even through a stirring machine to be ready for use, and then water-based acrylic resin, an antifoaming agent, an adhesion promoter and a curing agent are sequentially added into a paint mixing kettle filled with emulsion; 3, a spare water-based color paste solution is added into the solution, a thickening agent is finally added, and then deionized water is added to adjust the viscosity; 4, the mixture is filtered with 120-mesh spun silk fabric and then packaged.The method is good in coating adhesive force, pigment wetting performance, construction performance and storage stability, and can be suitable for protecting auto part materials, agricultural machine materials and the like.
Description
Technical field
The preparation method that the present invention relates to a kind of water-based stoving paint.
Background technology
At present, in the baking varnish coating system of China, solvent-borne type still accounts for the overwhelming majority.Tracing it to its cause, be first that the overwhelming majority comparatively speaking should have bigger gap with some performance of water-based stoving paint with oiliness baking vanish, wherein topmost performance difference is that the solvent resistance of dry film, the ribbon of resistance to RCA test performance differ greatly than oiliness baking vanish；The existing production line of the reason that another one water-based stoving paint at home can not be popularized and client has greatest relation；At present, the production line of overwhelming majority oiliness baking vanish nearly all can only meet 160 DEG C of 10min, and high-performance water-based baking vanish in the market must is fulfilled for the baking condition of 170～180 DEG C of 20～30min, in order to cater to this drying condition, production line must be extended on producing and improve baking temperature, and then adding investment and the energy consumption of manufacturer.
Although water-based stoving paint has high glaze, hardness, Bao Sebao light, the advantage such as heat-resisting; and it is widely used in the goods industries such as automobile, household electrical appliances, bookshelf, bicycle; play the effect of metal finishing and protection; but many directly or indirectly factors such as its surface tension is big, the latent heat of vaporization is big, dissolving power is limited, the selection of processing technology, construction technology, auxiliary agent and collocation all can cause water-based stoving paint to cause the phenomenon of bubble, and high in hardness, the transparency is good, humidity resistance good while be extremely difficult to resistance to impact and pliability preferably.
Summary of the invention
The present invention is directed to the deficiencies in the prior art part, it is provided that the preparation method of a kind of water-based stoving paint, reach the transparency good, hardness is high, humidity resistance good, has resistance to impact and pliability preferably simultaneously.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that
The preparation method of a kind of water-based stoving paint, it is characterised in that comprise the following steps:
(1) first the aqueous acrylic modified polyester emulsion that solids content is 70% is added formation film forming binder in water soluble amino resin cross-linking agent, then weigh water solublity argentum powder with electronic balance and add in film forming binder, stir 5 minutes by electric blender, it is subsequently added into nertralizer and deionized water, and grinds prepared aqueous color paste solution by sand mill；
(2) first aqueous color paste solution is measured with graduated cylinder, dispersant, pearlescent pigment is uniformly dispersed standby by high speed pneumatic blender, aqueous color paste solution: dispersant: pearlescent pigment=7～10:0.5～0.8:1～1.5, then water-borne acrylic resin is measured with graduated cylinder, defoamer, adhesion promoter and firming agent are sequentially added into equipped with in the paint mixing kettle of emulsion, water-borne acrylic resin: defoamer: adhesion promoter: firming agent=35～40:0.5～0.6:1.5～2.5:2.0～2.5, and the rotating speed controlling high speed pneumatic blender stirs 10～15 minutes under 500～700r/min shear rate, it is subsequently added into levelling agent, cosolvent and anti-settling agent, the pH value regulating mixed liquor with PH regulator is 7～8；
(3) in above-mentioned solution, standby aqueous color paste solution is added again, stir 15～20 minutes under 450r/min shear rate, being eventually adding thickening agent to stir 10～15 minutes under 450r/min shear rate, adding deionized water adjustment viscosity is 80～100s；
(4) filter with 120 order spun silk cloth, then pack.
The inventive method is on homemade aqueous acrylic modified polyester emulsion basis, adopt water soluble amino resin as cross-linking agent, using part methyl-etherified amino resins as firming agent, coordinate the defoamer, adhesion promoter and the flux that are suitable for, it is prepared for the water-based stoving paint of excellent combination property, make its storage stability good, be applicable to the protection of the material such as auto parts and components, agricultural machinery.
Further, nertralizer in step (1) is triethylamine, N, one or more mixture in N-dimethylethanolamine, 2-amino-2-methyl-1 propanol, nertralizer on the one hand with in the hydrophilic group of the acrylic resin of oiliness with become salt to make it possess water solublity, the pH value of water-based stoving paint system can be regulated on the other hand so that water paint has excellent storage stability.
Further, defoamer in step (2) is the mixture of polydimethylsiloxane, silicon cream, hydrophobic silicic aerogels and modified polyorganosiloxane, the many directly or indirectly factors such as processing technology, construction technology, the selection of auxiliary agent and collocation that can effectively reduce cause water-based stoving paint to cause the phenomenon of bubble, improve the quality of water-based stoving paint.
Further, firming agent in step (2) is high imino-type height methyl-etherified melamine resin, one in high methylol group type methyl-etherified melamine resin and HMMM formaldehyde resin, alkoxy methyl owing to containing in high methylol group type methyl-etherified melamine resin is mainly the group of cross-linking reaction, need higher temperature that cross-linking reaction could occur, and the reactivity of methylol is more than alkoxy methyl, the increase of methylol group content in amino resins, fixing response speed can be improved and reduce baking temperature, less imino group can reduce self-polymeric reaction simultaneously.
Further, cosolvent in step (2) is one or more mixture in isopropanol, propandiol butyl ether, n-butyl alcohol and ethanol, improve the water solublity of water paint, reduce the viscosity of coating, reduce the surface tension of aqueous coating system, improve the wettability with ground, improve its levelability, delay film formation time, improve gloss and the adhesive force of paint film.
Further, anti-settling agent in step (2) is mixture two or more in organobentonite, lithium magnesium silicate gel, polyurea modified polyurethane, polyamide wax, Tissuemat E, aerosil, improve the thixotropic index of water-based stoving paint system, coating can be made to have the characteristic of shear shinning, when viscosity is higher, it is possible to prevent pigment sedimentation.
Further, levelling agent in step (2) is the one in silicon class levelling agent, acrylic compounds levelling agent and polyurethanes levelling agent, can effectively reduce surface tension and the interfacial tension of water-based stoving paint system, to improve the coating wettability to substrate to be coated, the dispersibility of water-based stoving paint system can be improved simultaneously, increase the mobility of system automatically to repair the space that solvent volatilization causes.
Due to the fact that and have employed technique scheme, have the advantages that
Water-based stoving paint has that raw material is cheap and easy to get, film adhesive good, the bright feature plentiful, pigment wetting performance is good, and there is good workability, by on homemade aqueous acrylic modified polyester emulsion basis, adopt water soluble amino resin as cross-linking agent, using part methyl-etherified amino resins as firming agent, coordinate the defoamer, adhesion promoter and the flux that are suitable for, it is prepared for the water-based stoving paint of excellent combination property, make its storage stability good, be applicable to the protection of the material such as auto parts and components, agricultural machinery.
Detailed description of the invention
The preparation method of a kind of water-based stoving paint of the present invention, comprises the following steps:
(1) first the aqueous acrylic modified polyester emulsion that solids content is 70% is added formation film forming binder in water soluble amino resin cross-linking agent, then weigh water solublity argentum powder with electronic balance and add in described film forming binder, stir 5 minutes by electric blender, it is subsequently added into nertralizer and deionized water, and grinds worth aqueous color paste solution by sand mill；Nertralizer is triethylamine, N, one or more mixture in N-dimethylethanolamine, 2-amino-2-methyl-1 propanol, nertralizer on the one hand with in the hydrophilic group of the acrylic resin of oiliness with become salt to make it possess water solublity, the pH value of water-based stoving paint system can be regulated on the other hand so that water paint has excellent storage stability.
(2) first described aqueous color paste solution is measured with graduated cylinder, dispersant, pearlescent pigment is uniformly dispersed standby by high speed pneumatic blender, aqueous color paste solution: dispersant: pearlescent pigment=7～10:0.5～0.8:1～1.5, then water-borne acrylic resin is measured with graduated cylinder, defoamer, adhesion promoter and firming agent are sequentially added into equipped with in the paint mixing kettle of emulsion, water-borne acrylic resin: defoamer: adhesion promoter: firming agent=35～40:0.5～0.6:1.5～2.5:2.0～2.5, and the rotating speed controlling described high speed pneumatic blender stirs 10～15 minutes under 500～700r/min shear rate, it is subsequently added into levelling agent, cosolvent and anti-settling agent, the pH value regulating mixed liquor with PH regulator is 7～8；nullDefoamer is polydimethylsiloxane、Silicon cream、The mixture of hydrophobic silicic aerogels and modified polyorganosiloxane，Can effectively reduce processing technology、Construction technology、Many directly or indirectly factors such as the selection of auxiliary agent and collocation cause water-based stoving paint to cause the phenomenon of bubble，Improve the quality of water-based stoving paint，Firming agent is high imino-type height methyl-etherified melamine resin、One in high methylol group type methyl-etherified melamine resin and HMMM formaldehyde resin，Alkoxy methyl owing to containing in high methylol group type methyl-etherified melamine resin is mainly the group of cross-linking reaction，Need higher temperature that cross-linking reaction could occur，And the reactivity of methylol is more than alkoxy methyl，The increase of methylol group content in amino resins，Fixing response speed can be improved and reduce baking temperature，Less imino group can reduce self-polymeric reaction simultaneously，Cosolvent is isopropanol、Propandiol butyl ether、One or more mixture in n-butyl alcohol and ethanol，Improve the water solublity of water paint，Reduce the viscosity of coating，Reduce the surface tension of aqueous coating system，Improve the wettability with ground，Improve its levelability，Delay film formation time，Improve gloss and the adhesive force of paint film，Anti-settling agent is organobentonite、Lithium magnesium silicate gel、Polyurea modified polyurethane、Polyamide wax、Tissuemat E、Mixture two or more in aerosil，Improve the thixotropic index of water-based stoving paint system，Coating can be made to have the characteristic of shear shinning，When viscosity is higher，It is prevented from pigment sedimentation，Levelling agent is silicon class levelling agent、One in acrylic compounds levelling agent and polyurethanes levelling agent，Can effectively reduce surface tension and the interfacial tension of water-based stoving paint system，To improve the coating wettability to substrate to be coated，The dispersibility of water-based stoving paint system can be improved simultaneously，The mobility of increase system is automatically to repair the space that solvent volatilization causes.
(3) in above-mentioned solution, standby described aqueous color paste solution is added again, stir 15～20 minutes under 450r/min shear rate, being eventually adding thickening agent to stir 10～15 minutes under 450r/min shear rate, adding described deionized water adjustment viscosity is 80～100s.
(4) filter with 120 order spun silk cloth, then pack.
When using above-mentioned water-based stoving paint, first the substrate of required spraying is cleared up, and clean with IPA solvent scouring, then the viscosity of water-based stoving paint solution is adjusted to 65～80s, the pressure of aerial spraying machine is 500～650Kpa, and spray gun is from for 250～400mm, and painting environments temperature controls in room temperature.Workpiece painting completes to be placed on dry 15～20 minutes of indoor sudden strain of a muscle, is then placed in the baking oven of 150 DEG C～200 DEG C and toasts 20～30min, can obtain water-based stoving paint film after taking out cooling.The performance parameter of water-based stoving paint is as shown in table 1:
| Project | Performance indications |
| Fineness/μm | ≤20 |
| Thickness/μm | 30 |
| Alcohol resistance (500g) | 200 |
| Wearability (500g) | 750 |
| Adhesive force (3M hundred lattice)/% | 100 |
| Resistance to impact (1kg, 500mm) | Just >=50, anti->=50 |
| Bendability | 180,2mm (doubling is up to OT standard) |
| Solid content | 42.5 |
| 240h | Good |
| 480h | Surface is as good as shape |
| Storage stability (50 DEG C, 15d) | Slightly soft precipitation |
| Gloss (60)/% | ≥90 |
The performance parameter of table 1 water-based stoving paint
Different baking temperatures and drying time are on the impact of water-based stoving paint such as shown in table 2 to table 3:
The impact on water-based stoving paint performance of table 2 baking temperature
Table 3 drying time of the impact on water-based stoving paint performance
Table 2 and table 3 demonstrate the impact on water-based stoving paint performance of baking temperature and drying time respectively, when baking temperature is risen to 150 DEG C by 120 DEG C, dry 30min, the hardness of baking vanish is brought up to 2H by HB, continue thereafter with rising temperature, baking vanish hardness is not changed in, the methylol of the hydroxyl after film forming and water-compatible amino resin is described, alkoxy methyl chemistry cross-linking reaction is complete, define adhesive force, shock-resistant and that pliability is excellent baking vanish, as shown in Table 4 simultaneously, at 140 DEG C, when 20min, baking vanish can not be fully cured, by extending drying time to 50min, equally possible the reaching of baking vanish is fully cured hardness.
The inventive method is on homemade aqueous acrylic modified polyester emulsion basis, adopt water soluble amino resin as cross-linking agent, using part methyl-etherified amino resins as firming agent, coordinate the defoamer, adhesion promoter and the flux that are suitable for, it is prepared for the water-based stoving paint of excellent combination property, make its storage stability good, be applicable to the protection of the material such as auto parts and components, agricultural machinery
These are only specific embodiments of the invention, but the technical characteristic of the present invention is not limited thereto.Any based on the present invention, for realizing essentially identical technique effect, done ground simple change, equivalent replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (7)
1. the preparation method of a water-based stoving paint, it is characterised in that comprise the following steps:
(1) first the aqueous acrylic modified polyester emulsion that solids content is 70% is added formation film forming binder in water soluble amino resin cross-linking agent, then weigh water solublity argentum powder with electronic balance and add in described film forming binder, stir 5 minutes by electric blender, it is subsequently added into nertralizer and deionized water, and grinds prepared aqueous color paste solution by sand mill；
(2) first described aqueous color paste solution is measured with graduated cylinder, dispersant, pearlescent pigment is uniformly dispersed standby by high speed pneumatic blender, aqueous color paste solution: dispersant: pearlescent pigment=7～10:0.5～0.8:1～1.5, then water-borne acrylic resin is measured with graduated cylinder, defoamer, adhesion promoter and firming agent are sequentially added into equipped with in the paint mixing kettle of emulsion, water-borne acrylic resin: defoamer: adhesion promoter: firming agent=35～40:0.5～0.6:1.5～2.5:2.0～2.5, and the rotating speed controlling described high speed pneumatic blender stirs 10～15 minutes under 500～700r/min shear rate, it is subsequently added into levelling agent, cosolvent and anti-settling agent, the pH value regulating mixed liquor with PH regulator is 7～8；
(3) in above-mentioned solution, standby described aqueous color paste solution is added again, stir 15～20 minutes under 450r/min shear rate, being eventually adding thickening agent to stir 10～15 minutes under 450r/min shear rate, adding described deionized water adjustment viscosity is 80～100s；
(4) filter with 120 order spun silk cloth, then pack.
2. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the described nertralizer in step (1) is one or more mixture in triethylamine, N, N-dimethylethanolamine, 2-amino-2-methyl-1 propanol.
3. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the described defoamer in step (2) is the mixture of polydimethylsiloxane, silicon cream, hydrophobic silicic aerogels and modified polyorganosiloxane.
4. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the described firming agent in step (2) is the one in high imino-type height methyl-etherified melamine resin, high methylol group type methyl-etherified melamine resin and HMMM formaldehyde resin.
5. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the cosolvent in step (2) is one or more mixture in isopropanol, propandiol butyl ether, n-butyl alcohol and ethanol.
6. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the described anti-settling agent in step (2) is mixture two or more in organobentonite, lithium magnesium silicate gel, polyurea modified polyurethane, polyamide wax, Tissuemat E, aerosil.
7. the preparation method of a kind of water-based stoving paint according to claim 1, it is characterised in that: the described levelling agent in step (2) is the one in silicon class levelling agent, acrylic compounds levelling agent and polyurethanes levelling agent.
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| CN201410829941.6A CN105778734A (en) | 2014-12-26 | 2014-12-26 | Method for preparing water-based baking paint |
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| CN201410829941.6A CN105778734A (en) | 2014-12-26 | 2014-12-26 | Method for preparing water-based baking paint |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221517A (en) * | 2016-08-30 | 2016-12-14 | 河北晨阳工贸集团有限公司 | A kind of aqueous amino-stoving varnish and preparation method thereof |
| CN107868545A (en) * | 2017-12-13 | 2018-04-03 | 青岛益群环保新材料有限公司 | A kind of water-based cold casing color baking vanish |
| CN107880693A (en) * | 2017-12-13 | 2018-04-06 | 青岛益群环保新材料有限公司 | A kind of water-based cold spray steel drum baking vanish |
| CN107903745A (en) * | 2017-12-13 | 2018-04-13 | 青岛益群环保新材料有限公司 | A kind of reddish yellow chromatography water paint that can be directly sprayed on cold bucket |
| CN108017964A (en) * | 2017-12-13 | 2018-05-11 | 青岛益群环保新材料有限公司 | A kind of cold spray steel drum paint of water-based oil rub resistance |
| CN108410227A (en) * | 2018-03-01 | 2018-08-17 | 温州环诺新材料科技有限公司 | A kind of universal aqueous wheel hub baking vanish |
| CN108977029A (en) * | 2018-07-18 | 2018-12-11 | 廊坊立邦涂料有限公司 | A kind of water colour paint and preparation method thereof with high scintillation effect |
| CN112007739A (en) * | 2020-07-16 | 2020-12-01 | 珠海市瑞龙水墨有限公司 | Preparation method and application of nano particles |
| CN114621643A (en) * | 2022-03-31 | 2022-06-14 | 惠尔明（福建）化学工业股份有限公司 | Water-based amino baking paint with good stability and preparation method thereof |
| CN114736575A (en) * | 2022-05-17 | 2022-07-12 | 中山蓝海洋水性涂料有限公司 | High-gloss boiling-resistant water-based silver powder baking paint for stainless steel tableware and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221517A (en) * | 2016-08-30 | 2016-12-14 | 河北晨阳工贸集团有限公司 | A kind of aqueous amino-stoving varnish and preparation method thereof |
| CN107868545A (en) * | 2017-12-13 | 2018-04-03 | 青岛益群环保新材料有限公司 | A kind of water-based cold casing color baking vanish |
| CN107880693A (en) * | 2017-12-13 | 2018-04-06 | 青岛益群环保新材料有限公司 | A kind of water-based cold spray steel drum baking vanish |
| CN107903745A (en) * | 2017-12-13 | 2018-04-13 | 青岛益群环保新材料有限公司 | A kind of reddish yellow chromatography water paint that can be directly sprayed on cold bucket |
| CN108017964A (en) * | 2017-12-13 | 2018-05-11 | 青岛益群环保新材料有限公司 | A kind of cold spray steel drum paint of water-based oil rub resistance |
| CN108410227A (en) * | 2018-03-01 | 2018-08-17 | 温州环诺新材料科技有限公司 | A kind of universal aqueous wheel hub baking vanish |
| CN108977029A (en) * | 2018-07-18 | 2018-12-11 | 廊坊立邦涂料有限公司 | A kind of water colour paint and preparation method thereof with high scintillation effect |
| CN112007739A (en) * | 2020-07-16 | 2020-12-01 | 珠海市瑞龙水墨有限公司 | Preparation method and application of nano particles |
| CN114621643A (en) * | 2022-03-31 | 2022-06-14 | 惠尔明（福建）化学工业股份有限公司 | Water-based amino baking paint with good stability and preparation method thereof |
| CN114736575A (en) * | 2022-05-17 | 2022-07-12 | 中山蓝海洋水性涂料有限公司 | High-gloss boiling-resistant water-based silver powder baking paint for stainless steel tableware and preparation method thereof |
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Application publication date: 20160720 |