CN102585666B - Powder coating for radiator and preparation process of powder coating - Google Patents
Powder coating for radiator and preparation process of powder coating Download PDFInfo
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- CN102585666B CN102585666B CN201210044672.3A CN201210044672A CN102585666B CN 102585666 B CN102585666 B CN 102585666B CN 201210044672 A CN201210044672 A CN 201210044672A CN 102585666 B CN102585666 B CN 102585666B
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Abstract
The invention relates to a powder coating, in particular to a powder coating for a radiator and a preparation process of the powder coating. The powder coating consists of the following components: 30-32 percent of phenolic aldehyde modified epoxy resin, 30-32 percent of hydroxyl saturated polyester resin, 0.5-1.5 percent of pigment, 20-30 percent of rutile TiO2, 8-12 percent of calcium carbonate, 0.8-1 percent of flatting agent, 0.4-0.6 percent of yellow-preventing benzoin, 0.4-0.6 percent of polysiloxane defoaming agent, 0.8-1.3 percent of cross-linking agent and 0.5-1 percent of antioxidant. The powder coating for a radiator is scientific in formula, the cured film cannot become yellow after being exposed in a high-temperature working environment of the radiator for a long time, the salt fog resistance, gloss preserving property and the impact resistant property of the film are excellent, the preparation process is simple and feasible, and the market prospects are wide.
Description
Technical field
The present invention relates to powder coating, be specifically related to a kind of scatterer powder coating and preparation technology thereof.
Background technology
Powder coating is widely used in household electrical appliances, aluminium section bar and art metal furniture industry with its environmental protection, energy-conservation and efficient advantage, and it provides good decoration and protection effect to metallic surface.When scatterer uses because of it, need for a long time under high temperature, the easy yellowing of its surface coatings, tarnish, mechanical property variation, this not only hinders attractive in appearance, and easily shortens the safe operating life of hardware.The common feature of existing scatterer is: solder joint is many, weld seam is long, connecting portion is many and electrostatic spraying dead angle is many, common decoration there will be the defects such as bubble, shrinkage cavity, pin hole, the poor and surperficial tangerine peel of hardness of film be large in to the coating process of scatterer with powder coating, can not meet decoration requirement.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and can eliminate the various flaws such as bubble, shrinkage cavity and pin hole that cause film to produce due to the special construction of scatterer, strong adhesion, levelling is good, under the high-temperature work environment of scatterer, the film scatterer powder coating of xanthochromia, Gloss Retention and satisfactory mechanical property not for a long time.
The technical solution adopted for the present invention to solve the technical problems is: a kind of scatterer powder coating, its constituent by weight percentage scope is: phenol aldehyde modified epoxy resin 30-32%, hydroxyl saturated polyester resin 30-32%, pigment 0.5-1.5%, rutile TiO
220-30%, calcium carbonate 8-12%, flow agent 0.8-1%, anti-yellowing st-yrax 0.4-0.6%, polysiloxane defoamers 0.4-0.6%, linking agent 0.8-1.3% and oxidation inhibitor 0.5-1%.
The acid number of described hydroxyl saturated polyester resin is 30mg KOH/g, pigment is suitable for the good organic or inorganic pigment of heat resistance used for powder coating for what vapour bar or Lockwood company provided, flow agent is butyl polyacrylate, linking agent is iso-cyanuric acid triallyl ester, and oxidation inhibitor is aromatic hydroxyl polymkeric substance.
A preparation technology for powder coating for scatterer, has following steps:
(1) by weight percentage by phenol aldehyde modified epoxy resin 30-32%, hydroxyl saturated polyester resin 30-32%, pigment 0.5-1.5%, rutile TiO
220-30%, calcium carbonate 8-12%, flow agent 0.8-1%, anti-yellowing st-yrax 0.4-0.6%, polysiloxane defoamers 0.4-0.6%, linking agent 0.8-1.3% and oxidation inhibitor 0.5-1% prepare in proportion and put into the full and uniform mixing of high-speed mixing agitator 10-12min;
(2) material mixing is added in the screw extrusion press that HeII district of I district temperature is 100 ℃ and 110 ℃, the screw rod rotation of controlling by main frame frequency 32hz makes the sufficient melting of material mixing, then extrude, compressing tablet, cooling, broken by travelling belt again, the good sheet stock of fragmentation is put into pulverizing mill hopper, the major-minor barreling abrasive disc material of controlling pulverizing mill with main mill frequency 18Hz and secondary mill frequency 32Hz, sieves to obtain scatterer powder coating with 180 object screen clothes.
Described scatterer is 38-42 μ m with the D50 particle diameter of powder coating.
When scatterer of the present invention adopts electrostatic spraying constructional method to be sprayed on spreader surface with powder coating, through 195-205 ℃, 7-13min is curable completely.
The invention has the beneficial effects as follows: the hydroxyl saturated polyester resin in powder coating for scatterer of the present invention, makes coating when curing speed slows down, guarantee best levelling; Butyl polyacrylate flow agent and iso-cyanuric acid triallyl ester linking agent combine use, make film can automatically eliminate the various flaws such as bubble, shrinkage cavity and pin hole because the special construction of scatterer produces, film heat resistance is good, and strong adhesion, high, the surperficial levelling of hardness be good, without tangerine peel and shrinkage cavity; Aromatic hydroxyl antioxidant polymer and iso-cyanuric acid triallyl ester linking agent combine use, make the anti-aging increased functionality of film, film color and luster under 195 ℃ of-205 ℃ of conditions of cure does not change, after solidifying under the high-temperature work environment of scatterer xanthochromia not for a long time, salt fog resistance, gloss retention and shock resistance are good.
Powder coating scientific formulation for scatterer of the present invention, preparation is simple, gained D50 particle diameter be the powder coating of 38-42 μ m at the primary powder spraying ratio of angle higher than other like product, there are wide market outlook.
Specific embodiment
Embodiment mono-
A kind of scatterer powder coating, its preparation method has following steps:
(1) by weight percentage by 30% phenol aldehyde modified epoxy resin, 30% hydroxyl saturated polyester resin, 1.1% pigment, 26% rutile TiO
2, 10% calcium carbonate, 0.8% flow agent, 0.4% anti-yellowing st-yrax, 0.4% polysiloxane defoamers, 0.8% linking agent and 0.5% oxidation inhibitor, put into the full and uniform mixing of high-speed mixing agitator 10-12min;
(2) material mixing is added in the screw extrusion press that HeII district of I district temperature is 100 ℃ and 110 ℃, the screw rod rotation of controlling by main frame frequency 32hz makes the sufficient melting of material mixing, then extrude, compressing tablet, cooling, broken by travelling belt again, the good sheet stock of fragmentation is put into pulverizing mill hopper, the major-minor barreling abrasive disc material of controlling pulverizing mill with main mill frequency 18Hz and secondary mill frequency 32Hz, sieves to obtain scatterer powder coating with 180 object screen clothes.
Adopt electrostatic spraying constructional method to be sprayed on spreader surface this powder coating, through 195 ℃, 13min can be fully curing.
After testing: this powder coating D50 particle diameter is 38-42 μ m; The shock resistance (GB/T1732-1993) of film after solidifying: 50cm just recoils and passes through; Thermotolerance: 150 ℃, 30h toasts without the colourless change of loss of gloss; Salt-fog test 500h (GB/T1771-1991): without foaming, without cracking and without peeling; Sticking power (1mm cross-hatching, GB/T9286-1998): 0 grade; Pencil hardness (GB/T6739-1996): 3H.
Embodiment bis-
A kind of scatterer powder coating, its preparation method has following steps:
(1) by weight percentage by 32% phenol aldehyde modified epoxy resin, 32% hydroxyl saturated polyester, 0.5% pigment, 22% rutile TiO
2, 9% calcium carbonate, 1% flow agent, 0.6% anti-yellowing st-yrax, 0.6% polysiloxane defoamers, 1.3% linking agent and 1% oxidation inhibitor, put into the full and uniform mixing of high-speed mixing agitator 10-12min;
(2) with embodiment mono-step (2).
Adopt electrostatic spraying constructional method to be sprayed on spreader surface this powder coating, through 205 ℃, 7min can be fully curing.
After testing: this powder coating D50 particle diameter is 38-42 μ m; The shock resistance (GB/T1732-1993) of film after solidifying: 50cm just recoils and passes through; Thermotolerance: 150 ℃, 35h toasts without the colourless change of loss of gloss; Salt-fog test 500h (GB/T1771-1991): without foaming, without cracking and without peeling; Sticking power (1mm cross-hatching, GB/T9286-1998): 0 grade; Pencil hardness (GB/T6739-1996): 3H.
Embodiment tri-
A kind of scatterer powder coating, its preparation method has following steps:
(1) by weight percentage by 32% phenol aldehyde modified epoxy resin, 32% hydroxyl saturated polyester, 1% pigment, 25% rutile TiO
2, 6% calcium carbonate, 0.8% flow agent, 0.4% anti-yellowing st-yrax, 0.4% polysiloxane defoamers, 1% linking agent and 1.4% oxidation inhibitor, put into the full and uniform mixing of high-speed mixing agitator 10-12min;
(2) with embodiment mono-step (2).
Adopt electrostatic spraying constructional method to be sprayed on spreader surface this powder coating, through 200 ℃, 10min can be fully curing.
After testing: this powder coating D50 particle diameter is 38-42 μ m; The shock resistance (GB/T1732-1993) of film after solidifying: 50cm just recoils and passes through; Thermotolerance: 150 ℃, 35h toasts without the colourless change of loss of gloss; Salt-fog test 500h (GB/T 1771-1991): without foaming, without cracking and without peeling; Sticking power (1mm cross-hatching, GB/T9286-1998): 0 grade; Pencil hardness (GB/T6739-1996): 3H.
Claims (2)
1. a scatterer powder coating, is characterized in that: the constituent of coating by weight percentage scope is: phenol aldehyde modified epoxy resin 30-32%, hydroxyl saturated polyester resin 30-32%, pigment 0.5-1.5%, rutile TiO
220-30%, calcium carbonate 8-12%, flow agent 0.8-1%, anti-yellowing st-yrax 0.4-0.6%, polysiloxane defoamers 0.4-0.6%, linking agent 0.8-1.3% and oxidation inhibitor 0.5-1%;
The acid number of described hydroxyl saturated polyester resin is 30mg KOH/g, and flow agent is butyl polyacrylate, and linking agent is iso-cyanuric acid triallyl ester, and oxidation inhibitor is aromatic hydroxyl polymkeric substance.
2. scatterer powder coating as claimed in claim 1, is characterized in that: this scatterer is as follows with the step of preparation process of powder coating:
(1) by weight percentage by phenol aldehyde modified epoxy resin 30-32%, hydroxyl saturated polyester resin 30-32%, pigment 0.5-1.5%, rutile TiO
220-30%, calcium carbonate 8-12%, flow agent 0.8-1%, anti-yellowing st-yrax 0.4-0.6%, polysiloxane defoamers 0.4-0.6%, linking agent 0.8-1.3% and oxidation inhibitor 0.5-1% prepare in proportion and put into the full and uniform mixing of high-speed mixing agitator 10-12min;
(2) material mixing is added in the screw extrusion press that HeⅡ district of I district temperature is 100 ℃ and 110 ℃, the screw rod rotation of controlling by main frame frequency 32hz makes the sufficient melting of material mixing, then extrude, compressing tablet, cooling, broken by travelling belt again, the good sheet stock of fragmentation is put into pulverizing mill hopper, the major-minor barreling abrasive disc material of controlling pulverizing mill with main mill frequency 18Hz and secondary mill frequency 32Hz, sieves to obtain scatterer powder coating with 180 object screen clothes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210044672.3A CN102585666B (en) | 2012-02-27 | 2012-02-27 | Powder coating for radiator and preparation process of powder coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210044672.3A CN102585666B (en) | 2012-02-27 | 2012-02-27 | Powder coating for radiator and preparation process of powder coating |
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| CN102585666A CN102585666A (en) | 2012-07-18 |
| CN102585666B true CN102585666B (en) | 2014-07-09 |
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| CN105073918A (en) * | 2013-03-02 | 2015-11-18 | 朋诺股份有限公司 | Heat-dissipating powder coating composition, heat-dissipating coating film, and coated article |
| CN103254741B (en) * | 2013-04-09 | 2015-11-25 | 刘庆芳 | A kind of take saturated polyester resin as powder coating of major ingredient and preparation method thereof |
| CN103289536A (en) * | 2013-05-03 | 2013-09-11 | 马鞍山科信咨询有限公司 | Powdery paint containing tree ash |
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| CN103555150A (en) * | 2013-10-28 | 2014-02-05 | 安徽明都电气有限公司 | Powder coating for small and medium-sized engineering equipment shell |
| CN103555149A (en) * | 2013-10-28 | 2014-02-05 | 安徽明都电气有限公司 | Powder coating for radiator shell |
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| CN108264825A (en) * | 2018-01-24 | 2018-07-10 | 佛山市三水金恒金属制品有限公司 | The preparation method of the impact resistance powdery paints of aluminum products |
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| CN111040589A (en) * | 2019-12-27 | 2020-04-21 | 上海邦中新材料有限公司 | Special anticorrosive powder coating for pipeline and preparation method and application thereof |
| CN111117438A (en) * | 2019-12-28 | 2020-05-08 | 江阴市玲珑高分子材料有限公司 | Insulating flame-retardant coating |
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Owner name: JIANGSU HUAGUANG NEW MATERIAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JIANGSU HUAGUANG POWDER CO., LTD. Effective date: 20150603 |
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Effective date of registration: 20150603 Address after: 213000 No. 126 Dongfang Dong Road, Qishuyan District, Jiangsu, Changzhou Patentee after: Jiangsu Hua Guang novel material Science and Technology Ltd. Address before: 213102, Jiangsu Changzhou District, Wujin Province remote view of the town to build rural areas Patentee before: Jiangsu Huaguang Powder Co., Ltd. |