CN101671518A - Powder coating with super-weathering resistance, preparation method and application thereof - Google Patents
Powder coating with super-weathering resistance, preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses powder coating with super-weathering resistance, a preparation method and an application thereof. The powder coating comprises the following raw materials in parts by weight: 40-90 parts of weather-resistant polyester resin, 3-30 parts of thermosetting fluorocarbon resin, 4-50 parts of curing agent, 0.1-1.5 parts of flatting agent, 0.2-0.8 part of degasifying agent, 0-4.5 parts of defoaming agent and 4-45 parts of pigment and filler. The powder coating with super-weathering resistance provided by the invention has scientific and reasonable proportioning in the aspects of raw material composition and raw materials, fine comprehensive properties such as flexibility, hardness, adhesive force and the like, stable chemical property, easy storage, performances of acid rain, ozone, ultraviolet ray and chemical medicine resistance and the like in long-term outdoor use, environment protection and wide application range. The preparation method provided by the invention has reasonable processes, strong operability, high qualified rate of finished products and capability of realizing industrialized production.
Description
Technical field
The present invention relates to a kind of powder coating, be specifically related to a kind of powder coating and preparation method thereof and in preparation weathering resistance decorative coveringn, use with it with super-weathering resistance.
Background technology
Nearly ten years, along with China's rapid economy development, the demand of high-grade decorative powder coatings is also being increased year by year, wherein new requirement is proposed constantly the super-weathering resistance powder coating.Powder coating based on the thermosetting fluoro carbon resin is fine in aspect over-all propertieies such as weather-proof and chemical resistances, thermosetting fluoro carbon dust coating can be made transparent varnish, the excellent storage stability of coating, the physical and mechanical property of filming is good, it is the kind of weathering resistance the best in the powder coating, but its fetch long price can not be applied on a large scale, and most clients can't accept.With the weather resistant carboxy(l)polyester or based on the Weather-resisting powder coating of weather resistant hydroxyl polyester relatively poor aspect the endurance quality, also can't satisfy the standard of client's high request.U.S. invention (U.S.Patent 6812267) discloses the powder coating preparation technology that preparation contains methyl methacrylate polymer and fluoropolymer, and composite in the invention is thermoplasticity PVDF fluoropolymer rather than composite thermosetting fluoro carbon resin.China's invention (CN101298530) discloses a kind of fluoropolymer modified powder coating, the recipe ingredient complexity, and cost is higher, can not apply on a large scale.Therefore, be badly in need of a kind of good weatherability in the market, cheap, easily apply the powder coating of super-weathering resistance.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provide a kind of in excellent in durability, cheap, be convenient to the powder coating of the super-weathering resistance that the client accepts and apply on market, another object of the present invention provide this super-weathering resistance powder coating the preparation method and it is in the application that is used for preparing the weathering resistance decorative coveringn.
Technical scheme: in order to realize above purpose, the powder coating with super-weathering resistance provided by the invention comprises the raw material of following parts by weight:
40～90 parts in weather resisteant vibrin
3～30 parts of thermosetting fluoro carbon resins
4～50 parts in solidifying agent
0.1～1.5 part of flow agent
0.2～0.8 part of air release agent
0～4.5 part of defoamer
4～45 parts of color stuffings
As preferred version, powder coating with super-weathering resistance provided by the invention also can add other auxiliary agent of 0～30 parts by weight, such as wax class matting agent, be used to regulate the gloss of weathering resistance powder coating, obtain having the powder coating of various luster, also can add the curing catalysts that promotes resin solidification as required, perhaps add the solubilizing agent of the different components of promotion powder coating according to actual needs, perhaps also can add aluminum oxide growth agent auxiliary agent according to actual needs in the melt stage consistency.Wherein above-described wax class matting agent, solubilizing agent, resin solidification catalyzer and aluminum oxide growth agent auxiliary agent etc. all can be commonly used on the market, the toner coating that can buy wax class matting agent, solubilizing agent, resin solidification catalyzer and aluminum oxide growth agent auxiliary agent.
Powder coating with super-weathering resistance provided by the invention, wherein said weather resisteant vibrin are a kind of, two kinds or the multiple hybrid resin in weather resistant carboxyl polyester resin or the weather resistant hydroxy polyester resin.Wherein the weather resistant carboxyl polyester resin is a terminal carboxyl polyester resin, and the weather resistant hydroxy polyester resin is the hydroxyl telechelic polyester resin.
Powder coating with super-weathering resistance provided by the invention, wherein said matrix resin is the hybrid resin that weather resistant carboxyl polyester resin or weather resistant hydroxy polyester resin add the thermosetting fluoro carbon resin, the two has excellent chemical resistant properties, weathering resistance and high-decoration by certain after being listed as mixing, weather resistance is expected to reach 25 years, and price is obviously lower than independent thermosetting fluoro carbon resin, can apply.
Powder coating with super-weathering resistance provided by the invention, wherein said solidifying agent is masked isocyanate solidifying agent, triglycidyl isocyanurate, curable urethane resin agent or polyester resin solidifying agent etc., can improve the cross-linking properties of powder coating and be coated with membrane stability after adding solidifying agent, also can play the effect of powder quick coating physical dryness.
Powder coating with super-weathering resistance of the present invention, organic color stuffing such as can coupling red, the thioindigo of color stuffing, anthraquinone or azo or be inorganic color stuffings such as titanium dioxide, ferric oxide, magnesium oxide etc. wherein, the color and the opacifying power of coating can be strengthened after adding color stuffing, and the texture of coating can be strengthened.
Preparation method with powder coating of super-weathering resistance provided by the invention specifically may further comprise the steps:
1. choose weather resisteant vibrin, thermosetting fluoro carbon resin, solidifying agent, flow agent, air release agent, defoamer and color stuffing by weight and put into mixing tank (1), after extruding by forcing machine (2) then, cool off by Blowing stopper (3), also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, grind, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by secondary grinding machine (5) is preliminary;
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detection, finished product promptly obtain the powder coating of super-weathering resistance.
Among the wherein above preparation method, the resin of step described in 1. is the hybrid resin that weather resistant carboxyl polyester resin or weather resistant hydroxy polyester resin add the thermosetting fluoro carbon resin.
Among the wherein above preparation method, step can also add other auxiliary agents such as matting agent, curing catalysts, solubilizing agent and/or aluminum oxide growth agent in 1., and then and weather resisteant vibrin, thermosetting fluoro carbon resin, solidifying agent, flow agent, air release agent, defoamer and color stuffing mix after together coextrusion obtain the compressing tablet material.
Powder coating with super-weathering resistance of the present invention can prepare products such as door and window with weather resistant coatings, household appliances, automobile, body of motor cycle, sports equipment with the spraying machine spraying of routine.
The application of powder coating in the weather resistant coatings of preparation railway guardrail, wind and solar energy production facility, outdoor building decoration, bridge, roadbed, door and window, enclosure wall, family expenses mark look material, sports equipment, car body and household appliances with super-weathering resistance of the present invention.
When the powder coating with super-weathering resistance of the present invention is specifically used, it is clean earlier pre-treatment to be carried out on workpiece or surface, place, spraying contains the powder coating of thermosetting fluoro carbon resin then, at high temperature heat levelling then, obtain the Workpiece inspection warehouse-in through hot setting and then, or, play the effect of chemically-resistant, weather needing powder coating layer and the curing with super-weathering resistance provided by the invention in the spraying of place.
Beneficial effect: the powder coating with super-weathering resistance provided by the invention is compared with powder coating of the prior art and is had the following advantages:
1, the powder coating with super-weathering resistance provided by the invention shows through a large amount of experiments, and the proportioning between each raw material composition and the raw material is scientific and reasonable.
2, the powder coating with super-weathering resistance provided by the invention, its matrix resin is the hybrid resin that the poly-junket resin of weather resistant carboxyl polyester resin or weather resistant hydroxyl adds the thermosetting fluoro carbon resin, after mixing by a certain percentage, the two has excellent chemical resistant properties, weathering resistance and high-decoration, quicken the weathering resistance experiment and show that the weather resistance of powder coating is expected to reach 25 years, and the price of hybrid resin is lower than independent thermosetting fluoro carbon resin, can apply.
3, the powder coating with super-weathering resistance provided by the invention, have over-all propertieies such as good flexible, hardness, sticking power, and chemical property is stable, be easy to store, life-time service has performances such as acidproof rain, anti-ozone, UV resistant, chemical-resistant resistance to powder coating out of doors, erosion resistance is strong, and environmental protection, applied range.
4, the preparation method with powder coating of super-weathering resistance provided by the invention, technology is reasonable, and is workable, the production efficiency height, energy consumption is low, and the product qualified rate height for preparing can be realized industrialized production.
Description of drawings
Accompanying drawing is the preparation technology figure with powder coating of super-weathering resistance of the present invention.
Embodiment:
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment only is used to the present invention is described and is not used in and limit the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Embodiment 1
1, the parts by weight proportioning that has the powder coating of super-weathering resistance:
44 parts of weather resistant hydroxyl telechelic polyester resins
8.9 parts of thermosetting fluoro carbon resins
11 parts in masked isocyanate solidifying agent
14.5 parts of solubilizing agent
3.6 parts of curing catalysts
0.9 part of flow agent
0.6 part of air release agent
16.5 parts of color stuffings
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant hydroxyl telechelic polyester resin, thermosetting fluoro carbon resin, masked isocyanate solidifying agent, solubilizing agent, curing catalysts, flow agent, air release agent and color stuffing by above 1 described parts by weight and put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are filmed, carry out performance test then to filming, concrete test index and result are as shown in table 1:
The film performance detected result that table 1 powder coating prepares
Show that by table 1 detected result powder coating provided by the invention has good comprehensive performances, meet the standard that index respectively detects in country.
1, the parts by weight proportioning that has the powder coating of super-weathering resistance:
60 parts of weather resistant terminal carboxyl polyester resins
5.5 parts of thermosetting fluoro carbon resins
5 parts of triglycidyl isocyanurates (TGIC)
1.1 parts of flow agents
0.4 part of air release agent
27.5 parts of color stuffings
0.5 part of matting agent
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant terminal carboxyl polyester resin, thermosetting fluoro carbon resin, triglycidyl isocyanurate, flow agent, air release agent and color stuffing by above 1 described parts by weight and matting agent is put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 2:
50 parts of weather resistant terminal carboxyl polyester resins
6 parts of thermosetting fluoro carbon resins
5 parts of triglycidyl isocyanurates (TGIC)
3 parts of matting agents
0.8 part of flow agent
0.4 part of air release agent
34.8 parts of color stuffings
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant terminal carboxyl polyester resin, thermosetting fluoro carbon resin, triglycidyl isocyanurate, flow agent, air release agent and color stuffing by above 1 described parts by weight and matting agent is put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 3:
The performance test results of filming that table 3 powder coating prepares
Embodiment 4
45 parts of weather resistant hydroxyl telechelic polyester resins
6.5 parts of thermosetting fluoro carbon resins
10 parts in masked isocyanate solidifying agent
1.0 parts of flow agents
0.5 part of air release agent
36.5 parts of color stuffings
0.5 part of matting agent
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant hydroxyl telechelic polyester resin, thermosetting fluoro carbon resin, masked isocyanate solidifying agent, flow agent, air release agent and color stuffing by above 1 described parts by weight and matting agent is put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 4:
The performance test results of filming that table 4 powder coating prepares
Embodiment 5
90 parts of weather resistant hydroxyl telechelic polyester resins
25 parts of thermosetting fluoro carbon resins
30 parts in masked isocyanate solidifying agent
1.2 parts of flow agents
0.8 part of air release agent
38 parts of color stuffings
2 parts of matting agents
1 part of curing catalysts
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant hydroxyl telechelic polyester resin, thermosetting fluoro carbon resin, masked isocyanate solidifying agent, flow agent, air release agent and color stuffing, matting agent and curing catalysts by above 1 described parts by weight and put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 5:
The performance test results of filming that table 5 powder coating prepares
Embodiment 6
70 parts of weather resistant hydroxyl telechelic polyester resins
25 parts of thermosetting fluoro carbon resins
16 parts in masked isocyanate solidifying agent
1.5 parts of flow agents
0.6 part of air release agent
32 parts of color stuffings
5 parts of matting agents
5 parts of solubilizing agent
0.5 part of curing catalysts
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant hydroxyl telechelic polyester resin, thermosetting fluoro carbon resin, masked isocyanate solidifying agent, flow agent, air release agent, color stuffing, matting agent, solubilizing agent and curing catalysts by above 1 described parts by weight and put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 5:
The performance test results of filming that table 6 powder coating prepares
Embodiment 7
30 parts of weather resistant hydroxyl telechelic polyester resins
50 parts of weather resistant terminal carboxyl polyester resins
21 parts of thermosetting fluoro carbon resins
25 parts in masked isocyanate solidifying agent
1.5 parts of flow agents
0.6 part of air release agent
36 parts of color stuffings
3 parts of matting agents
2, the preparation that has the powder coating of super-weathering resistance:
1. choose weather resistant hydroxyl telechelic polyester resin, weather resistant terminal carboxyl polyester resin, thermosetting fluoro carbon resin, masked isocyanate solidifying agent, flow agent, air release agent, color stuffing and matting agent by above 1 described parts by weight and put into mixing tank (1), then by after forcing machine (2) coextrusion, pass through Blowing stopper (3) cooling again, also can carry freezing air further to cool off, obtain the compressing tablet material with heat exchanger (4);
2. get the compressing tablet material that 1. step obtains, obtain meal, use main grinding machine (6) secondary to pulverize grinding again and obtain fine powder, in the regrind process, can use heat exchanger (4) to carry chilled air cools, obtain fine powder by preliminary grinding of secondary grinding machine (5);
3. get the fine powder that 2. step obtains, after separating by cyclonic separator (7), sieve by screen cloth (8) again, detect finished product.
3,2 powder coating that prepare are sprayed filmed, carry out performance test then to filming, concrete test index and result are as shown in table 5:
The performance test results of filming that table 7 powder coating prepares
Show by above experimental result, proportioning is scientific and reasonable between each composition of powder coating provided by the invention, the coating for preparing with powder coating provided by the invention has over-all propertieies such as good snappiness, hardness, sticking power, all compound national standard of every index.
Embodiment 8 accelerated deterioration test experiments
Carry out the accelerated deterioration test experiments to adding the thermoset fluorocarbon resin with the super Weather-resisting powder coating prescription that does not add the thermoset fluorocarbon resin, test event is the QUV-B test, test condition is under 50 ℃, UV illumination 4 hours, in 40 ℃ of steam round-robin tests 4 hours, test sample plate was spraying solidified aluminium material model.Investigation is at 360 hours, 480 hours, 500 hours, 600 hours, 620 hours and 730 hours, the total color difference size of the aluminium material model of spraying toner coating, concrete experimental result as table 8 to shown in the table 11:
Table 8 adds the ageing test result of the powder coating coating before and after the thermoset fluorocarbon resin
Table 9 adds the ageing test result of the powder coating coating before and after the thermoset fluorocarbon resin
Table 10 adds the ageing test result of the powder coating coating before and after the thermoset fluorocarbon resin
Table 11 adds the ageing test result of the powder coating coating before and after the thermoset fluorocarbon resin
Show by the detected result of above table 8 to table 11, the coating that adds the powder coating of thermoset fluorocarbon resin detects the aging total color difference of its total color difference much smaller than the powder coating coating of the not fluorocarbon resin of identical digestion time through weathering test, as seen adds the weathering resistance that the thermoset fluorocarbon resin offsets light powder paint and has obvious enhanced effect.
Experimental result shows, weather resistant hydroxyl telechelic polyester resin or weather resistant terminal carboxyl polyester resin with play after the thermosetting fluoro carbon resin mixes by a certain percentage collaborative, the effect of helping each other, not only has good flexible by above hybrid resin as the matrix resin of powder coating, hardness, over-all propertieies such as sticking power, and has good chemically-resistant, weather, can ornamental strong advantage, and powder coating provided by the invention is keeping good weathering resistance, the stability of chemical property, the advantage of life-time service simultaneously out of doors, also have cheap, the advantage of applied range.Therefore, powder coating provided by the invention is expected to become the powder coating that a new generation has super-weathering resistance.
Claims (9)
1, a kind of powder coating with super weather resisteant is characterized in that, it comprises the raw material of following parts by weight:
40～90 parts in weather resisteant vibrin
3～30 parts of thermosetting fluoro carbon resins
4～50 parts in solidifying agent
0.1～1.5 part of flow agent
0.2～0.8 part of air release agent
0～4.5 part of defoamer
4～45 parts of color stuffings
2, the powder coating with super-weathering resistance according to claim 1, it is characterized in that described powder coating with super marquis's property also can add the matting agent of 0～30 parts by weight such as wax class etc., curing catalysts, solubilizing agent and/or aluminum oxide growth agent.
3, the powder coating with super-weathering resistance according to claim 1 is characterized in that, described weather resisteant vibrin is one or more the hybrid resin in weather resistant carboxyl polyester resin or the weather resistant hydroxy polyester resin.
4, the powder coating with super-weathering resistance according to claim 1 is characterized in that, described solidifying agent is masked isocyanate solidifying agent, triglycidyl isocyanurate, curable urethane resin agent or polyester resin solidifying agent.
According to each described powder coating of claim 1 to 4, it is characterized in that 5, described color stuffing is organic color stuffing or is inorganic color stuffing with super-weathering resistance.
6, a kind of described method with powder coating of super-weathering resistance of claim 1 for preparing is characterized in that may further comprise the steps:
1. choose weather resisteant vibrin, thermosetting fluoro carbon resin, solidifying agent, flow agent, air release agent, defoamer and color stuffing by the described parts by weight of claim 1 and put into mixing tank, after extruding by forcing machine then, obtain the compressing tablet material by the Blowing stopper cooling;
2. get the compressing tablet material that 1. step obtains, obtain fine powder by secondary grinding machine and main grinding machine regrind;
3. get the fine powder that 2. step obtains, separate, sieve, detection, finished product by cyclonic separator.
7, the preparation method with powder coating of super-weathering resistance according to claim 6 is characterized in that, step can also add matting agent, curing catalysts, solubilizing agent and/or aluminum oxide growth agent in 1., and coextrusion obtains the compressing tablet material after mixing.
8, door and window, household appliances, automobile, body of motor cycle, the sports equipment for preparing with each described powder coating spraying of claim 1 to 5 with super-weathering resistance.
9, each described powder coating application in the weather resistant coatings of preparation railway guardrail, wind and solar energy production facility, outdoor building decoration, bridge, roadbed, door and window, enclosure wall, family expenses mark look material, sports equipment, car body and household appliances of claim 1 to 5 with super-weathering resistance.
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