CN103031014B - A kind of preparation method of non-conductive substrate powder paint coating - Google Patents
A kind of preparation method of non-conductive substrate powder paint coating Download PDFInfo
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- CN103031014B CN103031014B CN201210537047.2A CN201210537047A CN103031014B CN 103031014 B CN103031014 B CN 103031014B CN 201210537047 A CN201210537047 A CN 201210537047A CN 103031014 B CN103031014 B CN 103031014B
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Abstract
The present invention relates to a kind of preparation method of non-conductive substrate powder paint coating, described method comprises the steps: that (1) is to non-conductive substrate coating low-viscosity (mobile) liquid resin combination; (2) to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, be heating and curing, form powder coating.Gained paint coating thickness of the present invention is 5 ~ 200 μm and controlled, and coating surface is smooth, coating flatness≤3 μm.Compared to conventional electrostatic spraying, can be used for non-conductive substrate, and there is the advantages such as adhesive force is good, the saving energy, technique are simple.Described method is applicable to the non-conducting materials such as timber, paper, cement, glass, plastics, pottery, is particularly useful for timber.
Description
Technical field
The present invention relates to a kind of preparation method of non-conductive substrate powder paint coating, belong to paint coatings field.
Background technology
In recent years, powdery paints with its resource-saving, economize the energy, pollution-free, efficiency is high, easily realize the features such as automation, becomes coating variety with fastest developing speed.Powdery paints is mainly used on metal objects and applies decorative coveringn.This coating is in electrostatic field, and by dry colored particles is sprayed to object in friction or the Special coating device that intensifies of electrostatic, particle is adhered on object by electrostatic force.The advantage of powder coating can be modified various structures and surface, and coating is very firm, resistance to wears, the weatherproof of external application grade.In addition, powder charcoal, without solvent, can reclaim due to powder and reuse, so almost do not waste.Coating layer thickness on object can accurately control.Further, this method is specially adapted to the coating of complex-shaped object.Finally, powder coating has pliability and adhesion characteristics, therefore, after powder coating, can form curling and crimping after the object coating of flat board and so on.
Current powdery paints at some temperature-sensitive materials as the fields such as timber, paper, plastics, glass also start to be applied, people actively expand the research and development to powder coating technology for this reason, and achieve certain achievement, but due to powdery paints the most frequently used be electrostatic spray, this just needs matrix material to have certain electric conductivity.For base material that is non-conductive or poorly conductive, be normally first coated with one deck electrically-conducting paint and improve electric conductivity, and then carry out application.
CN101342526 disclose a kind of timber components surface cured powder paint method, but only timber is heated to 60 ~ 80 DEG C be difficult to powdery paints is attached to surface, be difficult to shaping; Disclosed method powdery paints is coated on non-metallic substrate of WO01/30927, but the method precoating polymer needs to use solubility latent catalyst; The application problem that CN101186780 discloses a kind of UV curing powder coating and production method thereof, coating process solves non-refractory and thick matter ground, but the method is subject to the restriction of light-cured resin technology of preparing and equipment manufacturing cost; CN1226301 discloses a kind of method of applying powder coating on length of lignocellulosic material, but will remove solvent after the method dipping, and low-temperature setting need use ultraviolet light polymerization, technique relative complex.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of non-conductive substrate powder paint coating, described method technique is simple, and coating uniform, the non-conductive substrate face coat after coating is even, hardness is high, adhesive force is excellent.
In order to achieve the above object, present invention employs following technical scheme:
A preparation method for non-conductive substrate powder paint coating, described method comprises the steps:
(1) to non-conductive substrate coating low-viscosity (mobile) liquid resin combination;
(2) to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, be heating and curing, form powder coating.
First the present invention adopts low-viscosity (mobile) liquid resin to non-conductive substrate coating processing, utilizes the good fluidity of resin to penetrate in non-conductive substrate top layer, plays the effect improving case hardness and adhesive force; In addition, utilize the adhesiveness adhering powder coating of resin, be conducive to the uniformity controlling coating, improve the compatibility of coating.Due to the good compatibility of low-viscosity (mobile) liquid resin, at relatively high temperatures, its can mixed mutually with the powdery paints of liquid state and together with uniform curing, thus realize the powder coating and their application to non-conductive substrate.Due to the osmosis that low-viscosity (mobile) liquid resin is good, relative to precoating conductive coating technique, present invention process products obtained therefrom has stronger adhesive force.
Preferably, step (1) is front carries out pretreatment to non-conductive substrate surface.Described pretreatment comprises cleaning non-conductive substrate surface dirt and dirt, and rough surface is polished polishing.
Non-conductive substrate of the present invention is selected from the mixture of any one or at least two kinds in timber, paper, cement, glass, plastics or pottery, preferred timber.
Described low-viscosity (mobile) liquid resin combination is selected from the combination of any one or at least two kinds in the mixture of the mixture of low-viscosity (mobile) liquid resin, low-viscosity (mobile) liquid resin and solvent, low-viscosity (mobile) liquid resin and curing agent.Namely the mixture of the mixture of described low-viscosity (mobile) liquid resin and solvent, low-viscosity (mobile) liquid resin and curing agent utilizes solvent or curing agent to dilute the mixture of rear formation to low-viscosity (mobile) liquid resin.The mixture formed after described low-viscosity (mobile) liquid resin combination both can be low-viscosity (mobile) liquid resin also can be curing agent or solvent dilution, or the combination of at least two kinds, all can realize the present invention.
Above-mentioned curing agent can adopt the curing agent that this kind of resin is conventional or general in the field, as the Baxxodur of BASF
tMeC301, Baxxodur
tMeC110, Baxxodur
tMeC331, HI190BS, HI-190; Versamid100, Versamid115, Genamid151 that section of Germany is peaceful; DesmodurN3390, DesmodurN75 of Bayer Bitterfeld GmbH; TrigonoxV388, ButanoxM-50 of Akzo Nobel, the Baxxodur of preferred BASF
tMthe TrigonoxV388 of EC301, Akzo Nobel.
Described solvent, as concrete example, the alcohols such as methyl alcohol, ethanol, butanols can be enumerated, the ethers such as ethyl cellosolve, butyl cellosolve, ethylene glycol-methyl ether, carbitol, BC, the ketones such as acetone, butanone, methyl ethyl ketone, hexone, cyclohexanone, toluene, dimethylbenzene, mesitylene etc. are aromatic hydrocarbon based, the ester such as ethoxyethyl acetate, ethyl acetate class, N, the nitrogenous kind solvents such as dinethylformamide, DMA, METHYLPYRROLIDONE.Above-mentioned solvent can be used alone one, also can two kinds or two or more used in combination, the ketone flux such as the aromatic hydrocarbon solvents such as preferred toluene, dimethylbenzene, mesitylene and acetone, butanone, methyl ethyl ketone, hexone, cyclohexanone are used in combination.
The viscosity of low-viscosity (mobile) liquid resin of the present invention is 100 ~ 2000cps/25 DEG C, preferably 200 ~ 1200cps/25 DEG C, particularly preferably 300 ~ 800cps/25 DEG C.
Described low-viscosity (mobile) liquid resin is selected from epoxy resin, acrylic resin, organic siliconresin, the mixture of any one or at least two kinds in unsaturated polyester resin or polyurethane resin, the mixture of described mixture such as epoxy resin and acrylic resin, the mixture of organic siliconresin and unsaturated polyester resin, the mixture of unsaturated polyester resin and polyurethane resin, epoxy resin, the mixture of acrylic resin and organic siliconresin, organic siliconresin, the mixture of unsaturated polyester resin and polyurethane resin, epoxy resin, acrylic resin, the mixture of organic siliconresin and unsaturated polyester resin, preferred epoxy and/or acrylic resin, further preferred epoxy and acrylic resin, most preferably epoxy resin.
Preferably, the preferred tetraglycidel ether epoxy resin of described epoxy resin is or/and ethylene oxidic ester epoxy resin, the mixture of any one or at least two kinds further preferably in bisphenol A type epoxy resin, bisphenol f type epoxy resin, novolac epoxy resin, glycerol epoxy resin, tetrahydrobenzene dimethyl ester epoxy resin or O-phthalic ester epoxy resin, most preferably bisphenol A type epoxy resin.
Preferably, the epoxide equivalent of described bisphenol A type epoxy resin is 180 ~ 280g/eq, preferably 185 ~ 210g/eq.
Described powdery paints is selected from epoxide powder coating, epoxy-polyester powder coating, polyester powder coating, polyurethane powder coating, the mixture of any one or at least two kinds in acrylic acid powder coatings or fluororesin powder coating, preferred Low-Temperature Curable Epoxy Powder Paint, temperature curing epoxy low-polyester powder coating, low-temperature setting polyester powder coating, low-temperature setting polyurethane powder coating, the mixture of any one or at least two kinds in low-temperature setting acrylic acid powder coatings or low-temperature setting fluororesin powder coating, preferred Low-Temperature Curable Epoxy Powder Paint further, the mixture of any one or at least two kinds in temperature curing epoxy low-polyester powder coating or low-temperature setting polyester powder coating.Described " low-temperature setting " refers to that solidification temperature is lower than 140 DEG C.Above-mentioned low temperature cured powder coating can commercially obtain, and also can be prepared with reference to preparation method disclosed in prior art and obtain.
Preferably, epoxy resin in described epoxide powder coating, epoxy-polyester powder coating, Low-Temperature Curable Epoxy Powder Paint and temperature curing epoxy low-polyester powder coating is bisphenol A type epoxy resin, the epoxide equivalent of described bisphenol A type epoxy resin is 600 ~ 2000g/eq, preferably 600 ~ 1200g/eq.
Preferably, mylar in described epoxy-polyester powder coating, polyester powder coating, temperature curing epoxy low-polyester powder coating and low-temperature setting polyester powder coating is terminal carboxyl polyester, the number-average molecular weight of described terminal carboxyl polyester is 2000 ~ 9000, acid number is 15 ~ 60, and acid number is preferably 20 ~ 40.
Acrylic resin in described acrylic acid powder coatings and low-temperature setting acrylic acid powder coatings is the acrylic resin containing epoxide group, and epoxide equivalent is 500 ~ 2200.
Fluororesin in described fluororesin powder coating and low-temperature setting fluororesin powder coating is hydroxyl fluororesin, and fluorinated volume > 20%, hydroxyl value is 40 ~ 50mgKOH/g.
Composition and the preparation method of above-mentioned powdery paints are prior art, and those skilled in the art can commercially obtain, and also can be prepared according to the composition of powdery paints disclosed in prior art and method and obtain.
By low-viscosity (mobile) liquid resin combination even application on non-conductive substrate surface, form wet film, the thickness controlling wet film is 1 ~ 100 μm, preferably 30 ~ 60 μm.
To the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, form dry film, controlling build is 10 ~ 200 μm, preferably 20 ~ 50 μm.
The temperature of described solidification is 100 ~ 200 DEG C, preferably 100 ~ 140 DEG C; Preferably, described hardening time is 10 ~ 60min, preferably 10 ~ 30min.
A preparation method for non-conductive substrate powder paint coating, comprises the steps:
(1 ') first carries out pretreatment to non-conductive substrate surface, comprises cleaning surface dirt and dirt, rough surface is polished polishing;
Low-viscosity (mobile) liquid resin combination is evenly coated on the non-conductive substrate surface that step (1 ') processed by (2 '), and form wet film, controlling wet-film thickness is 1 ~ 100 μm, preferably 30 ~ 60 μm;
(3 '), to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, forms dry film, and controlling build is 10 ~ 200 μm, and preferably 20 ~ 50 μm, be then heating and curing, solidification temperature is 100 ~ 200 DEG C, preferably 100 ~ 140 DEG C; Hardening time is 10 ~ 60min, preferably 10 ~ 30min, forms powder coating.
Compared with prior art, the present invention has following beneficial effect:
Gained paint coating thickness of the present invention is 5 ~ 200 μm and controlled, and coating surface is smooth, coating flatness≤3 μm.Compared to conventional electrostatic spraying, can be used for non-conductive substrate, and there is the advantages such as adhesive force is good, the saving energy, technique are simple.
Detailed description of the invention
For better the present invention being described, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
According to the method for the invention in material applying coatings coatings such as timber, plastics, glass, pottery, cement, adhesive force test measures according to GB/T9286-1998, pencil hardness test measures according to GB/T6739-1996, and thickness measuring measures according to GB/T1764-1989.
Embodiment 1:
Carry out surface preparation to 50cm × 50cm medium density fibre board (MDF), cleaning surface dirt and dirt, polish polishing with sand paper rough surface; Be 310cps by viscosity, epoxide equivalent is the bisphenol A type epoxy resin of 190g/eq and the Baxxodur of 12%
tMeC301 mixture is as bottom priming paint, medium density fibre board (MDF) is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 15m/min, controls thickness and is about 30 μm, it is made evenly to be coated on medium density fibre board (MDF), check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 45m/min, back and forth sprays, make powdery paints uniform adhesion on priming paint, thickness is about 50 μm.Powdery paints selects low-temperature setting bisphenol A type epoxy resin powdery paints (each component consumption is in table 1), then puts into 110 DEG C of oven for curing 30min.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is about 80 μm, and hardness is 2H.
Table 1(weight portion):
| Epoxy resin E-12 | 35 |
| Mylar CE1099 | 15 |
| Methylimidazole | 3 |
| Levelling agent 701 | 4 |
| Titanium dioxide | 40 |
| Styrax | 3 |
Embodiment 2:
Surface preparation is carried out to 50cm × 50cm glass plate, cleaning surface dirt and dirt, using viscosity be 450cps low viscosity propylene acid resin and 15% TrigonoxV388 mixture as bottom priming paint, be stored in head tank, by nozzle from 30s the pouring of top, on uniform glass plate, controlling thickness is 45 μm, priming paint is evenly applied on a glass, check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 30m/min, back and forth sprays, make powdery paints uniform adhesion on priming paint, thickness is about 85 μm.Powdery paints selects acrylic acid powder coatings (each component consumption is in table 2), then puts into the oven for curing 15min of 140 DEG C.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 130 μm, and hardness is 6H.
Table 2(weight portion):
| Acrylic resin FB9870 | 70 |
| Blocked polyisocyanate | 6 |
| Dibutyl tin dilaurate | 1.5 |
| Levelling agent 701 | 1 |
| Titanium dioxide | 20 |
| Zinc oxide | 4 |
| Degassed wax powder | 5 |
| Styrax | 0.5 |
Embodiment 3:
Surface preparation is carried out to 50cm × 50cm plastic plate, cleaning surface dirt and dirt, be 600cps by viscosity, epoxide equivalent is that the low-viscosity bisphenol A type epoxy resin of 210g/eq is as bottom priming paint, take out after ABS plate being put into impregnating bath dipping 5s, priming paint is evenly coated on plastic plate, thickness is 65 μm, check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 25m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 105 μm.Powdery paints selects epoxide powder coating (each component consumption is in table 3), then puts into 110 DEG C oven for curing 30 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 170 μm, and hardness is 3H.
Table 3(weight portion):
| Epoxy resin E-06 | 55 |
| Sebacic dihydrazide | 1 |
| 2-benzylimidazoline | 1.5 |
| Levelling agent 701 | 3 |
| Calcium carbonate | 20 |
| Zinc oxide | 20 |
| Degassed wax powder | 1 |
| Styrax | 2 |
Embodiment 4:
Surface preparation is carried out to 50cm × 50cm ceramic wafer, cleaning surface dirt and dirt, be that the low viscosity unsaturated polyester resin of 800cps is as bottom priming paint using viscosity, ceramic wafer is put into roller glue machine, left and right handwheel in the middle of adjustment roller glue machine machine upper portion, the speed of dancer rools glue machine rubber roll is 9m/min, controlling thickness is 95 μm, priming paint is made evenly to be coated on zirconia ceramics plate, check bubble-free, without after hole, coated plate is put into automatic spraying machine, adjustment spraying rate is 10m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 200 μm.Upper strata powdery paints selects low-temperature setting polyester powder coating (each component consumption is in table 4), then puts into 120 DEG C oven for curing 25 minutes.The coating flat smooth obtained, coating flatness is 2 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 395 μm, and hardness is 3H.
Table 4(weight portion):
| Mylar XB1968-A | 60 |
| Hydroxyalkyl amide | 5 |
| Acetylbutyrylcellulose | 3 |
| Barium sulfate | 15 |
| Zinc oxide | 15 |
| Degassed wax powder | 1 |
| Styrax | 1 |
Embodiment 5:
Surface preparation is carried out to 50cm × 50cm millboard, cleaning surface dirt and dirt, be that the tetraglycidel ether epoxy resin of 560cps is as bottom priming paint using viscosity, millboard is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 7m/min, controlling thickness is 100 μm, priming paint is evenly coated on millboard, check bubble-free, without after hole, coated plate is put into automatic spraying machine, adjustment spraying rate is 15m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 200 μm.Upper strata powdery paints selects temperature curing epoxy low-polyester powder coating (each component consumption is in table 5), then puts into 100 DEG C oven for curing 20 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 340 μm, and hardness is 2H.
Table 5(weight portion):
| Mylar XB1968-C | 40 |
| Epoxy resin E-03 | 34 |
| Glyoxal ethyline quinoline | 2 |
| Levelling agent 503 | 2 |
| Barium sulfate | 15 |
| Zinc oxide | 5 |
| Degassed wax powder | 1 |
| Styrax | 1 |
Embodiment 6
Carry out surface preparation to 50cm × 50cm ceramic wafer, cleaning surface dirt and dirt, polish polishing with sand paper rough surface; Be 100cps by viscosity, epoxide equivalent is that the bisphenol A type epoxy resin of 180g/eq is as bottom priming paint, ceramic wafer is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 15m/min, control thickness and be about 5 μm, it is made evenly to be coated on ceramic wafer, check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 45m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 20 μm.Powdery paints selects low-temperature setting bisphenol A type epoxy resin powdery paints (each component consumption is in table 6), then puts into the inherent 100 DEG C of solidification 30min of baking oven.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is about 80 μm, and hardness is 2H.
Table 6(weight portion):
| Epoxy resin E-12 | 35 |
| Mylar CE1099 | 15 |
| Methylimidazole | 3 |
| Levelling agent 701 | 4 |
| Titanium dioxide | 40 |
| Styrax | 3 |
Embodiment 7
Carry out surface preparation to 50cm × 50cm glass plate, cleaning surface dirt and dirt, polish polishing with sand paper rough surface; Be 2000cps by viscosity, epoxide equivalent is that the bisphenol A type epoxy resin of 280g/eq is as bottom priming paint, glass plate is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 15m/min, control thickness and be about 100 μm, it is made evenly to apply on a glass, check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 45m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 150 μm.Powdery paints selects bisphenol A type epoxy resin powdery paints, and the epoxide equivalent of described bisphenol A type epoxy resin is 600g/eq, and each component consumption, in table 7, then puts into the inherent 200 DEG C of solidification 60min of baking oven.The coating flat smooth obtained, coating flatness is 5 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is about 80 μm, and hardness is 2H.
Table 7(weight portion):
| Bisphenol A type epoxy resin | 55 |
| Sebacic dihydrazide | 1 |
| 2-benzylimidazoline | 1.5 |
| Levelling agent 701 | 3 |
| Calcium carbonate | 20 |
| Zinc oxide | 20 |
| Degassed wax powder | 1 |
| Styrax | 2 |
Embodiment 8
Carry out surface preparation to 50cm × 50cm ceramic wafer, cleaning surface dirt and dirt, polish polishing with sand paper rough surface; Be 1200cps by viscosity, epoxide equivalent is that the bisphenol A type epoxy resin of 230g/eq is as bottom priming paint, ceramic wafer is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 15m/min, control thickness and be about 50 μm, it is made evenly to be coated on ceramic wafer, check bubble-free, without after hole, coated plate put into automatic spraying machine, adjustment spraying rate is 45m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 200 μm.Powdery paints selects bisphenol A type epoxy resin powdery paints, and the epoxide equivalent of described bisphenol A type epoxy resin is 2000g/eq, and each component consumption, in table 8, then puts into the inherent 150 DEG C of solidification 40min of baking oven.The coating flat smooth obtained, coating flatness is 5 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is about 80 μm, and hardness is 2H.
Table 8(weight portion):
| Bisphenol A type epoxy resin | 55 |
| Sebacic dihydrazide | 1 |
| 2-benzylimidazoline | 1.5 |
| Levelling agent 701 | 3 |
| Calcium carbonate | 20 |
| Zinc oxide | 20 |
| Degassed wax powder | 1 |
| Styrax | 2 |
Embodiment 9
Surface preparation is carried out to the ABS plate of 50cm × 50cm, cleaning surface dirt and dirt, be that the bisphenol f type epoxy resin of 560cps is as bottom priming paint using viscosity, ABS plate is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 7m/min, controlling thickness is 100 μm, priming paint is evenly coated on millboard, check bubble-free, without after hole, coated ABS plate is put into automatic spraying machine, adjustment spraying rate is 15m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 140 μm.Upper strata powdery paints selects low-temperature setting polyester powder coating, and the number-average molecular weight of terminal carboxyl polyester is 2000 ~ 9000, and acid number is 15, and each component consumption, in table 9, then puts into 120 DEG C oven for curing 40 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 340 μm, and hardness is 2H.
Table 9(weight portion):
| Terminal carboxyl polyester | 120 |
| HAA curing agent | 15 |
| Levelling agent 503 | 2 |
| Barium sulfate | 15 |
| Zinc oxide | 5 |
| Degassed wax powder | 1 |
| Styrax | 1 |
Embodiment 10
Surface preparation is carried out to the cement plate of 50cm × 50cm, cleaning surface dirt and dirt, be that the organic siliconresin of 700cps is as bottom priming paint using viscosity, cement plate is put into glue spreader, left and right handwheel in the middle of adjustment glue spreader machine upper portion, the feeding speed regulating glue spreader is 7m/min, controlling thickness is 600 μm, priming paint is evenly coated on millboard, check bubble-free, without after hole, coated cement plate is put into automatic spraying machine, adjustment spraying rate is 15m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 150 μm.Upper strata powdery paints selects low-temperature setting polyester powder coating, and the number-average molecular weight of terminal carboxyl polyester is 2000 ~ 9000, and acid number is 60, and each component consumption, in table 10, then puts into 120 DEG C oven for curing 40 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 340 μm, and hardness is 2H.
Table 10(weight portion):
| Terminal carboxyl polyester | 120 |
| HAA curing agent | 15 |
| Levelling agent 503 | 2 |
| Barium sulfate | 15 |
| Zinc oxide | 5 |
| Degassed wax powder | 1 |
| Styrax | 1 |
Embodiment 11
Surface preparation is carried out to 50cm × 50cm ceramic wafer, cleaning surface dirt and dirt, be that the low-viscosity polyurethane resin of 200cps is as bottom priming paint using viscosity, ceramic wafer is put into roller glue machine, left and right handwheel in the middle of adjustment roller glue machine machine upper portion, the speed of dancer rools glue machine rubber roll is 9m/min, controlling thickness is 95 μm, priming paint is evenly coated on ceramic wafer, check bubble-free, without after hole, coated plate is put into automatic spraying machine, adjustment spraying rate is 10m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 160 μm.Upper strata powdery paints selects acrylic acid powder coatings, acrylic resin in described acrylic acid powder coatings is the acrylic resin containing epoxide group, epoxide equivalent is 500g/eq, (each component consumption is in table 11), then puts into 120 DEG C oven for curing 25 minutes.The coating flat smooth obtained, coating flatness is 2 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 395 μm, and hardness is 3H.
Table 11(weight portion):
| Acrylic resin | 85 |
| Adipic acid | 10 |
| Levelling agent 701 | 1 |
| Epoxy resin E-16 | 3.5 |
| Styrax | 0.5 |
Embodiment 12
Surface preparation is carried out to 50cm × 50cm ceramic wafer, cleaning surface dirt and dirt, be that the low-viscosity polyurethane resin of 200cps is as bottom priming paint using viscosity, ceramic wafer is put into roller glue machine, left and right handwheel in the middle of adjustment roller glue machine machine upper portion, the speed of dancer rools glue machine rubber roll is 9m/min, controlling thickness is 95 μm, priming paint is evenly coated on ceramic wafer, check bubble-free, without after hole, coated plate is put into automatic spraying machine, adjustment spraying rate is 10m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 180 μm.Upper strata powdery paints selects acrylic acid powder coatings, acrylic resin in described acrylic acid powder coatings is the acrylic resin containing epoxide group, epoxide equivalent is 2200g/eq, (each component consumption is in table 11), then puts into 120 DEG C oven for curing 25 minutes.The coating flat smooth obtained, coating flatness is 2 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 395 μm, and hardness is 3H.
Table 12(weight portion):
| Acrylic resin | 85 |
| 12 carbon dicarboxylic acids | 10 |
| Levelling agent 503 | 1 |
| Epoxy resin E-16 | 3.5 |
| Styrax | 0.5 |
Embodiment 13
Surface preparation is carried out to 50cm × 50cmABS plate, cleaning surface dirt and dirt, be 600cps by viscosity, epoxide equivalent is that the low-viscosity bisphenol A type epoxy resin of 210g/eq is as bottom priming paint, take out after ABS plate being put into impregnating bath dipping 5s, priming paint is evenly coated on plastic plate, thickness is 65 μm, check bubble-free, without after hole, coated ABS plate put into automatic spraying machine, adjustment spraying rate is 25m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 105 μm.Powdery paints selects fluororesin powder coating, and the fluororesin in described fluororesin powder coating is hydroxyl fluororesin, and fluorinated volume is greater than 20%, and hydroxyl value is 40mgKOH/g, and each component consumption, in table 13, then puts into 110 DEG C oven for curing 30 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 170 μm, and hardness is 3H.
Table 13(weight portion):
| Hydroxyl fluororesin | 68 |
| Enclosed type isophorone diisocyanate | 15 |
| Levelling agent 701 | 1 |
| Titanium dioxide | 15 |
| Styrax | 1 |
Embodiment 14
Surface preparation is carried out to 50cm × 50cmABS, cleaning surface dirt and dirt, be 600cps by viscosity, epoxide equivalent is that the low-viscosity bisphenol A type epoxy resin of 210g/eq is as bottom priming paint, take out after ABS plate being put into impregnating bath dipping 5s, priming paint is evenly coated on plastic plate, thickness is 65 μm, check bubble-free, without after hole, coated ABS plate put into automatic spraying machine, adjustment spraying rate is 25m/min, reciprocal spraying, make powdery paints uniform adhesion on priming paint, thickness is about 105 μm.Powdery paints selects fluororesin powder coating, and the fluororesin in described fluororesin powder coating is hydroxyl fluororesin, and fluorinated volume is greater than 20%, and hydroxyl value is 50mgKOH/g, and each component consumption, in table 14, then puts into 110 DEG C oven for curing 30 minutes.The coating flat smooth obtained, coating flatness is 3 μm, the shrinkage cavity of pore-free pin hole, and film adhesive is 0 grade, and thickness is 170 μm, and hardness is 3H.
Table 14(weight portion):
| Hydroxyl fluororesin | 63 |
| Enclosed type isophorone diisocyanate | 15 |
| Levelling agent 503 | 1 |
| Titanium dioxide | 20 |
| Styrax | 1 |
It should be noted that and understand, when not departing from the spirit and scope of the present invention required by accompanying claim, various amendment and improvement can be made to the present invention of foregoing detailed description.Therefore, the scope of claimed technical scheme is not by the restriction of given any specific exemplary teachings.
Applicant states, the present invention illustrates method detailed of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned method detailed, does not namely mean that the present invention must rely on above-mentioned method detailed and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (31)
1. a preparation method for non-conductive substrate powder paint coating, is characterized in that, described method comprises the steps:
(1) to non-conductive substrate coating low-viscosity (mobile) liquid resin combination, described low-viscosity (mobile) liquid resin combination is selected from the combination of any one or at least two kinds in the mixture of the mixture of low-viscosity (mobile) liquid resin, low-viscosity (mobile) liquid resin and solvent, low-viscosity (mobile) liquid resin and curing agent, and the viscosity of described low-viscosity (mobile) liquid resin is 100 ~ 2000cps/25 DEG C;
(2) to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, be heating and curing, form powder coating;
Wherein, by low-viscosity (mobile) liquid resin combination even application on non-conductive substrate surface, wet film is formed, the thickness controlling wet film is 1 ~ 100 μm, to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, form dry film, controlling build is 10 ~ 200 μm.
2. the method for claim 1, is characterized in that, step (1) is front carries out pretreatment to non-conductive substrate surface, and described pretreatment comprises cleaning non-conductive substrate surface dirt and dirt, and rough surface is polished polishing.
3. method as claimed in claim 1 or 2, is characterized in that, described non-conductive substrate is selected from the mixture of any one or at least two kinds in timber, paper, cement, glass, plastics or pottery.
4. method as claimed in claim 3, it is characterized in that, described non-conductive substrate is selected from timber.
5. the method for claim 1, is characterized in that, the viscosity of described low-viscosity (mobile) liquid resin is 200 ~ 1200cps/25 DEG C.
6. method as claimed in claim 5, it is characterized in that, the viscosity of described low-viscosity (mobile) liquid resin is 300 ~ 800cps/25 DEG C.
7. the method for claim 1, is characterized in that, described low-viscosity (mobile) liquid resin is selected from the mixture of any one or at least two kinds in epoxy resin, acrylic resin, organic siliconresin, unsaturated polyester resin or polyurethane resin.
8. method as claimed in claim 7, it is characterized in that, described low-viscosity (mobile) liquid resin is selected from epoxy resin and/or acrylic resin.
9. method as claimed in claim 8, it is characterized in that, described low-viscosity (mobile) liquid resin is selected from epoxy resin and acrylic resin.
10. method as claimed in claim 7, it is characterized in that, described low-viscosity (mobile) liquid resin is selected from epoxy resin.
11. methods as claimed in claim 7, is characterized in that, described epoxy resin is that tetraglycidel ether epoxy resin is or/and ethylene oxidic ester epoxy resin.
12. methods as claimed in claim 11, it is characterized in that, described epoxy resin is the mixture of any one or at least two kinds in bisphenol A type epoxy resin, bisphenol f type epoxy resin, novolac epoxy resin, glycerol epoxy resin, tetrahydrobenzene dimethyl ester epoxy resin or O-phthalic ester epoxy resin.
13. methods as claimed in claim 12, it is characterized in that, described epoxy resin is bisphenol A type epoxy resin.
14. methods as claimed in claim 13, is characterized in that, the epoxide equivalent of described bisphenol A type epoxy resin is 180 ~ 280g/eq.
15. methods as claimed in claim 14, is characterized in that, the epoxide equivalent of described bisphenol A type epoxy resin is 185 ~ 210g/eq.
16. the method for claim 1, it is characterized in that, described powdery paints is selected from the mixture of any one or at least two kinds in epoxide powder coating, epoxy-polyester powder coating, polyester powder coating, polyurethane powder coating, acrylic acid powder coatings or fluororesin powder coating.
17. methods as claimed in claim 16, it is characterized in that, described powdery paints is selected from the mixture of any one or at least two kinds in Low-Temperature Curable Epoxy Powder Paint, temperature curing epoxy low-polyester powder coating, low-temperature setting polyester powder coating, low-temperature setting polyurethane powder coating, low-temperature setting acrylic acid powder coatings or low-temperature setting fluororesin powder coating, and described low-temperature setting refers to that solidification temperature is lower than 140 DEG C.
18. methods as claimed in claim 17, is characterized in that, described powdery paints is selected from the mixture of any one or at least two kinds in Low-Temperature Curable Epoxy Powder Paint, temperature curing epoxy low-polyester powder coating or low-temperature setting polyester powder coating.
19. methods as claimed in claim 17, it is characterized in that, epoxy resin in Low-Temperature Curable Epoxy Powder Paint and temperature curing epoxy low-polyester powder coating is bisphenol A type epoxy resin, and the epoxide equivalent of described bisphenol A type epoxy resin is 600 ~ 2000g/eq.
20. methods as claimed in claim 19, is characterized in that, the epoxide equivalent of described bisphenol A type epoxy resin is 600 ~ 1200g/eq.
21. methods as claimed in claim 17, it is characterized in that, mylar in described temperature curing epoxy low-polyester powder coating and low-temperature setting polyester powder coating is terminal carboxyl polyester, and the number-average molecular weight of described terminal carboxyl polyester is 2000 ~ 9000, and acid number is 15 ~ 60.
22. methods as claimed in claim 21, it is characterized in that, acid number is 20 ~ 40.
23. methods as claimed in claim 17, is characterized in that, the acrylic resin in described low-temperature setting acrylic acid powder coatings is the acrylic resin containing epoxide group, and epoxide equivalent is 500 ~ 2200g/eq.
24. methods as claimed in claim 17, is characterized in that, the fluororesin in described low-temperature setting fluororesin powder coating is hydroxyl fluororesin, fluorinated volume > 20%, and hydroxyl value is 40 ~ 50mgKOH/g.
25. the method for claim 1, is characterized in that, by low-viscosity (mobile) liquid resin combination even application on non-conductive substrate surface, form wet film, the thickness controlling wet film is 30 ~ 60 μm.
26. the method for claim 1, is characterized in that, to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, form dry film, controlling build is 20 ~ 50 μm.
27. the method for claim 1, is characterized in that, the temperature of described solidification is 100 ~ 200 DEG C.
28. methods as claimed in claim 27, is characterized in that, the temperature of described solidification is 100 ~ 140 DEG C.
29. the method for claim 1, is characterized in that, described hardening time is 10 ~ 60min.
30. methods as claimed in claim 29, it is characterized in that, described hardening time is 10 ~ 30min.
31. the method for claim 1, is characterized in that, described method comprises the steps:
(1 ') first carries out pretreatment to non-conductive substrate surface, comprises cleaning surface dirt and dirt, rough surface is polished polishing;
Low-viscosity (mobile) liquid resin combination is evenly coated on the non-conductive substrate surface that step (1 ') processed by (2 '), and form wet film, controlling wet-film thickness is 1 ~ 100 μm;
(3 '), to the non-conductive substrate spray coating powder paint being coated with low-viscosity (mobile) liquid resin combination, forms dry film, and controlling build is 10 ~ 200 μm, and be then heating and curing, solidification temperature is 100 ~ 200 DEG C; Hardening time is 10 ~ 60min, forms powder coating.
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| CN104231686B (en) * | 2014-08-22 | 2016-07-06 | 安徽博大纤维素科技有限公司 | A kind of powdery paints of long service life |
| CN104588301A (en) * | 2015-02-15 | 2015-05-06 | 浙江省磐安县绿海工艺厂有限公司 | Powder coating method for surface of bamboo and wood material |
| CN104889039A (en) * | 2015-06-04 | 2015-09-09 | 遵义春华新材料科技有限公司 | Powder coating applying process of non-conductor substrate |
| CN106311565A (en) * | 2015-06-30 | 2017-01-11 | 富钰精密组件（昆山）有限公司 | Electrostatic spraying method for complex of metal and non-conducting material and shell |
| CN105542631A (en) * | 2016-01-28 | 2016-05-04 | 廊坊云途科技有限公司 | Special transparent powder coating for glass plate and preparation and use method thereof |
| NL2019197B1 (en) * | 2017-07-07 | 2019-01-16 | Stahl Int B V | Powder coating method and coated article |
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| CN108531056B (en) * | 2018-04-03 | 2020-06-09 | 中国科学院过程工程研究所 | Heat-sensitive substrate powder coating and preparation method thereof |
| CN113316401B (en) * | 2019-12-20 | 2023-07-21 | 株式会社爱世克私 | Shoe upper manufacturing method, shoe upper and shoe |
| CN113122103A (en) * | 2019-12-30 | 2021-07-16 | 苏州青田新材料有限公司 | Imitation electroplating powder coating and preparation method thereof |
| CN111554882A (en) * | 2020-05-13 | 2020-08-18 | 中科(马鞍山)新材料科创园有限公司 | Ternary positive pole piece and coating method and application thereof |
| CN112495735A (en) * | 2020-11-04 | 2021-03-16 | 西安鑫垚陶瓷复合材料有限公司 | Surface flatness processing method for ceramic matrix composite material satellite light structural part and structural part |
| CN112724803B (en) * | 2020-12-29 | 2022-06-07 | 老虎表面技术新材料（苏州）有限公司 | Plane powder coating composition and coating thereof |
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