CN104974653A - Weather-resistant super-leveling powder coating - Google Patents
Weather-resistant super-leveling powder coating Download PDFInfo
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- CN104974653A CN104974653A CN201510349656.9A CN201510349656A CN104974653A CN 104974653 A CN104974653 A CN 104974653A CN 201510349656 A CN201510349656 A CN 201510349656A CN 104974653 A CN104974653 A CN 104974653A
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- powder coating
- weather
- leveling
- weather resistant
- polyester resin
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Abstract
The invention discloses a weather-resistant super-leveling powder coating. The weather-resistant super-leveling powder coating comprises the following components in percentages by weight: 55% to 65% of modified hydroxyl polyester resin, 9% to 12% of aliphatic polyisocyanates, 20% to 30% of modified padding, 1.0% to 3% of import leveling agent, 0.5% to 1% of degassing agent, 1% to 1.5% of antioxygen ultraviolet light absorber and 0.5% to 1% of weather-resistant pigment. The weather-resistant super-leveling powder coating uses the hydroxyl polyester resin, polyisocyanates, import leveling agent and modified padding as main raw materials; the unblocking temperature of the curing agent polyisocyanates is high, and the melt leveling time of the powder coating is sufficient during baking of the powder coating, so that the powder coating is sufficient leveled before a curing reaction is began, and the leveling property of the coating is excellent; and moreover, the reaction provides a higher cross-linking density, so that the abrasion resistance and chemical medicine resistance of the coating are high, and the powder coating has high weather resistance and illumination performance.
Description
Technical field
The invention belongs to technical field of chemical paint, relate to a kind of powder coating, especially relate to a kind of outdoor weather resistant and surpass levelling powder coating.
Background technology
Powder coating and water-borne coatings all have safety, environmental protection, free of contamination advantage and dark liking by market, but both deposit very large difference, the key distinction has: different from water-borne coatings, and powder coating is not using solvent as dispersion medium, but the solid powdery coating of 100%.Powder coating VOC free, water-borne coatings is then containing a small amount of VOC; The auxiliary agent that powder coating uses is little, and mostly is Powdered auxiliary agent, and water-borne coatings uses liquid flux mostly; Powder coating coating is thicker, and can reach more than 60 μm by disposable spray finishing thickness, and water-borne coatings needs spraying repeatedly just can reach this thickness, and thus powder coating is higher than water-borne coatings in operating efficiency, and more energy-conservation; The powder coating scope of application relate to household electrical appliances, metal device, automobile finish in the majority, the water-borne coatings scope of application then more relates to furniture metope, wood lacquer aspect.
Traditional powder coating, its surperficial flow leveling is poor, and glossiness is not high, or outdoor weatherability can be poor, and therefore it is relative to water-borne coatings, and decorative surface effect is poor.Therefore, for meeting the needs of outdoor weatherability energy and decorative surface effect, be badly in need of a kind of novel powder coating possessing good weatherability properties energy of exploitation.
Summary of the invention
The object of this invention is to provide the weather resistant that a kind of flat appearance is smooth, decorative surface is effective and surpass levelling powder coating.
Above-mentioned purpose of the present invention is achieved by the following scheme:
A kind of weather resistant surpasses levelling powder coating, and component and the mass percent of described weather-proof super levelling powder coating are as follows:
Modified hydroxyl polyester resin 55-65%
Aliphatic polyisocyante 9-12%
Modified filler 20-30%
Import flow agent 1.0-3%
Air release agent 0.5-1%
Oxidation inhibitor UV light absorber 1-1.5%
Weather resistant pigment 0.5-1%.
For improving surface decoration performance further, component and the mass percent of above-mentioned weather-proof super levelling powder coating are as follows:
Modified hydroxyl polyester resin 60%
Aliphatic polyisocyante 9.1%
Modified filler 20-30%
Import flow agent 1.0-3%
Air release agent 0.5-1%
Oxidation inhibitor UV light absorber 1-1.5%
Weather resistant pigment 0.5-1%.
Further, the softening temperature of above-mentioned modified hydroxyl polyester resin is 105-120 DEG C, and second-order transition temperature is 58-65 DEG C, and described modified hydroxyl polyester resin carries out modification obtain by adding liquid flow agent in resin.
The isocyanato content of above-mentioned aliphatic polyisocyante is 14.8-15.7%, and second-order transition temperature is 40-55 DEG C.
Above-mentioned modified filler selects modification process white, and it carries out coating modification formation by epoxy crosslinking agent under 60-80 DEG C of condition.
Above-mentioned flow agent selects the flow agent of import, and film has fabulous levelling, improves coating film gloss and vividness, eliminates the defects such as shrinkage cavity pin hole, reduces tangerine peel.
St-yrax selected by air release agent, can eliminate the disadvantages such as the pin hole bubble that coating produces in the curing process, can also mixing good in flow agent, improves film coated surface tension force, regulates film coated surface levelling.
Compared with prior art, the beneficial effect that the present invention has is:
The present invention with hydroxy polyester resin, isocyanic ester, import flow agent, modified filler for main raw material(s), because the deblocking temperature of solidifying agent isocyanic ester is high, when powder coating toasts, there are enough powder coating melting flow times, make powder coating abundant levelling before beginning curing reaction, so the levelling property of film is fine; This reaction another provides high cross-linking density, make the wear resistance of film and chemical proofing fine, there is high weather-proof and illumination performance.
The present invention has good weathering resistance, flow leveling, and surface gloss is very high after spray coating, substantially increase surface decoration and the performance requriements of sprayed product, it is widely used in the application of bike, motorcycle, outdoor air conditioner, automobile and the outdoor products such as tractor part, fork truck.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment only understands the present invention for helping, and should not be considered as concrete restriction of the present invention.
As no specific instructions, various raw material of the present invention all can be obtained by commercially available; Or prepare according to the ordinary method of this area.Unless otherwise defined or described herein, all specialties used herein and scientific words and art technology skillfully the person of entering the same meaning be familiar with.In addition any method similar or impartial to described content and material all can be applicable in the inventive method.
embodiment 1
The formula of weather-proof super levelling powder coating is as follows:
Modified hydroxyl polyester resin 600
Aliphatic polyisocyante 91
Modification process white 200
Import flow agent 10
St-yrax 5
Oxidation inhibitor UV light absorber 10
Weather resistant pigment 10
embodiment 2
The formula of weather-proof super levelling powder coating is as follows:
Modified hydroxyl polyester resin 600
Aliphatic polyisocyante 91
Modification process white 250
Import flow agent 10
St-yrax 5
Oxidation inhibitor UV light absorber 10
Weather resistant pigment 10
embodiment 3
The formula of weather-proof super levelling powder coating is as follows:
Modified hydroxyl polyester resin 600
Aliphatic polyisocyante 91
Modification process white 300
Import flow agent 10
St-yrax 5
Oxidation inhibitor UV light absorber 10
Weather resistant pigment 10
Preparation steps is as follows:
(1) weigh according to the formula described in above-described embodiment 1-3, and pre-mixing is carried out to the raw material taken;
(2) material of pre-mixing is melt extruded, extrusion parameter: 100 DEG C, a district of 100 DEG C two, district, screw speed 45HZ;
(3) the above-mentioned material extruded is cooled, carry out coarse reduction subsequently, obtain uniform flap;
(4) carry out the broken and classification of fine powder to the material of coarse reduction to sieve and obtain product.
By as shown in the table for the performance perameter of the weather-proof super condition of cure of levelling powder coating described in embodiment 1-3 and the film of formation:
| Condition of cure and performance test | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Condition of cure | 200℃×10min | 200℃×10min | 200℃×10min |
| Shock strength | 490N*cm | 490N*cm | 490N*cm |
| Drawing test | 7mm | 7mm | 7mm |
| Pencil hardness | 2H | 2H | 2H |
| Resistance to 5% hydrochloric acid | 240h | 240h | 240h |
| Resistance to 5%NaOH | 240 | 240 | 240 |
| Salt spray resistance | 500h | 500h | 500h |
| Wet-heat resisting | 500h | 500h | 500h |
| Be exposed to the sun and protect light rate in 12 months in open air | 97% | 97% | 97% |
| Outward appearance | Very flat smooth | Very flat smooth | More smooth |
As seen from the table, compared with traditional powder coating, weather-proof super levelling powder coating of the present invention has good outdoor weatherability energy, and outward appearance very flat smooth, and the decorative surface effect of itself and water-borne coatings is suitable.
Applicant states, person of ordinary skill in the field is on the basis of above-described embodiment, by the concrete content point value of above-described embodiment component, combined with the technical scheme of summary of the invention part, thus the new numerical range produced, also be one of record scope of the present invention, the application, for making specification sheets simple and clear, no longer enumerates these numerical ranges.
Claims (6)
1. weather resistant surpasses a levelling powder coating, it is characterized in that, component and the mass percent of described weather-proof super levelling powder coating are as follows:
Modified hydroxyl polyester resin 55-65%
Aliphatic polyisocyante 9-12%
Modified filler 20-30%
Import flow agent 1.0-3%
Air release agent 0.5-1%
Oxidation inhibitor UV light absorber 1-1.5%
Weather resistant pigment 0.5-1%.
2. a kind of weather resistant as claimed in claim 1 surpasses levelling powder coating, it is characterized in that, component and the mass percent of described weather-proof super levelling powder coating are as follows:
Modified hydroxyl polyester resin 60%
Aliphatic polyisocyante 9.1%
Modified filler 20-30%
Import flow agent 1.0-3%
Air release agent 0.5-1%
Oxidation inhibitor UV light absorber 1-1.5%
Weather resistant pigment 0.5-1%.
3. a kind of weather resistant as claimed in claim 1 surpasses levelling powder coating, it is characterized in that: the softening temperature of described modified hydroxyl polyester resin is 105-120 DEG C, second-order transition temperature is 58-65 DEG C, and described modified hydroxyl polyester resin carries out modification obtain by adding liquid flow agent in resin.
4. a kind of weather resistant as claimed in claim 1 surpasses levelling powder coating, it is characterized in that: the isocyanato content of described aliphatic polyisocyante is 14.8-15.7%, and second-order transition temperature is 40-55 DEG C.
5. a kind of weather resistant as claimed in claim 1 surpasses levelling powder coating, it is characterized in that: described modified filler selects modification process white, and it carries out coating modification formation by epoxy crosslinking agent under 60-80 DEG C of condition.
6. a kind of weather resistant as claimed in claim 1 surpasses levelling powder coating, it is characterized in that: st-yrax selected by described air release agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510349656.9A CN104974653A (en) | 2015-06-23 | 2015-06-23 | Weather-resistant super-leveling powder coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510349656.9A CN104974653A (en) | 2015-06-23 | 2015-06-23 | Weather-resistant super-leveling powder coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104974653A true CN104974653A (en) | 2015-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510349656.9A Pending CN104974653A (en) | 2015-06-23 | 2015-06-23 | Weather-resistant super-leveling powder coating |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671518A (en) * | 2009-08-14 | 2010-03-17 | 老虎粉末涂料制造（太仓）有限公司 | Powder coating with super-weathering resistance, preparation method and application thereof |
| CN102181223A (en) * | 2011-05-26 | 2011-09-14 | 安徽美佳新材料股份有限公司 | Super leveling mirror surface powder coating |
-
2015
- 2015-06-23 CN CN201510349656.9A patent/CN104974653A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671518A (en) * | 2009-08-14 | 2010-03-17 | 老虎粉末涂料制造（太仓）有限公司 | Powder coating with super-weathering resistance, preparation method and application thereof |
| CN102181223A (en) * | 2011-05-26 | 2011-09-14 | 安徽美佳新材料股份有限公司 | Super leveling mirror surface powder coating |
Non-Patent Citations (2)
| Title |
|---|
| 冯素兰等: "《粉末涂料》", 30 September 2004 * |
| 陈治良: "《现代涂装手册》", 31 January 2010 * |
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Application publication date: 20151014 |
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