CN103614043B - A kind of reversible temperature indicating powder coating and preparation method thereof and using method - Google Patents
A kind of reversible temperature indicating powder coating and preparation method thereof and using method Download PDFInfo
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- CN103614043B CN103614043B CN201310600785.1A CN201310600785A CN103614043B CN 103614043 B CN103614043 B CN 103614043B CN 201310600785 A CN201310600785 A CN 201310600785A CN 103614043 B CN103614043 B CN 103614043B
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Abstract
The present invention relates to a kind of reversible temperature indicating powder coating, its raw material form component and parts by weight as follows: GMA type acrylic resin 70-80 part; Dodecanedioic acid 15-25 part; Flow agent 0.6-1 part; Anti-yellowing change st-yrax 0.2-0.4 part; Reversible temperature-sensitive camouflage paint 2-13 part; Other pigment 0.01-5 part except reversible temperature-sensitive camouflage paint.Powder coating attractive appearance of the present invention, having can indicated temperature functional, shows specific color at a certain temperature, and reaches discoloring temperature instant color-changing; When environmental requirement improves day by day, abandon solvent-borne type allochroic paint in the past, have employed the powder coating form of solvent-free releasing; This powder coating has higher tint retention, the longer variable color life-span, and has splendid ornamental and weathering resistance, and hardness also can reach 2H-3H; Meanwhile, this powder coating both may be used for open air, also may be used for indoor, expanded its use range, reduced the production cost of enterprise.
Description
Technical field
The invention belongs to technical field of coatings, relate to powder coating, especially a kind of reversible temperature indicating powder coating and preparation method thereof and using method.
Background technology
Powder coating and application techniques thereof are development in recent years novel process, new technologies rapidly, there is the saving energy and resource, reduce environmental pollution, simple process, easily realize the features such as automatization, coating is sturdy and durable, powder is recyclable, cause the attention of countries in the world coating industry.Along with widespread use and the further investigation of powder coating, the performance of powder coating is being improved always, and not only its decorative effect requires more and more higher, its functional requirement also gets more and more, the double antiseptic powder of pipeline, anti-bacterial powder, antistatic powder, conductive powder etc.Also there is now the coating of ask for something energy indicated temperature, the cream jug of such as baby, if the coating of outside can indicated temperature, just can eliminate the step of mother's temperature indicating; The external coating (EC) thermo-paint of chassis lid, can know whether machine generates heat in permanent operation; It is normal etc. that the outside surface spraying temperature indicating powder of scatterer can know whether scatterer dispels the heat, therefore according to different usages, not only need this thermoindicator paint to have indicated temperature, have outside the effect of anti-corrosion function, also high-decoration should be had, the requirement of high-wearing feature.
At present, existing solvent-borne type thermo-paint is due to containing solvent, the phenomenon of the solvent evaporates that frequent generation is a large amount of, to have hardness lower for existing common epoxy/polyester type temperature indicating powder coating in addition, hardness generally can only resistance to H even below, tint retention is poor, the shortcoming that the variable color life-span is shorter, and camouflage paint is expensive, the production cost of enterprise is higher.
By retrieval, find following two sections of patent documents relevant to patent application of the present invention:
1, a kind of thermo-paint (CN102850834A), its formula comprises: lead stearate 25-30 weight part, eicosanoic acid 20-25 weight part, methylcellulose gum 1-2 weight part, ethyl cellulose 1-2 weight part, dimethylbenzene 20-30 weight part, propyl carbinol 15-20 weight part.The present invention is solvent-borne type thermo-paint, have certain temperature indicating function, but the volatilization of solvent causes certain environmental pollution.
2, temperature sensing color change power coating (CN102051109), its formula comprises: saturated hydroxy polyester resin 50-70 part, triglycidyl isocyanurate 3.7-5.0 part; Anti-yellowing change st-yrax 0.01-0.03 part; Flow agent 0.4-1.0 part; Wetting enhancer 0.5-1.5 part; Filler 10-30 part; Colorant 0.3-20.The present invention is by the optimization of formulation for coating material, and cooperatively interacting of different auxiliary agent, changes along with the change of temperature, shows distinct colors at different temperature, plays the effect of temperature-prompting or warning.
Being contrasted by technical characteristic, there are the different of essence from patent application of the present invention in above-mentioned two sections of patent publication us.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, there is provided a kind of and not only there is higher tint retention, the longer variable color life-span, and there is splendid ornamental and weathering resistance, hardness also can reach 2H-3H, there is longer work-ing life, more durable reversible temperature indicating powder coating, meanwhile, the preparation method of this reversible temperature indicating powder coating is simple, with low cost, reduce the production cost of enterprise.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of reversible temperature indicating powder coating, its raw material form component and parts by weight as follows:
And the hydroxyl value of described GMA type acrylic resin is 18-50mgKOH/g, and epoxy equivalent (weight) is 430-500g/mol.
And described flow agent is acrylate type flow agent.
And described reversible temperature-sensitive camouflage paint is microencapsulation material.
And the discoloring temperature scope of described heat discoloration pigment is 40 DEG C ~ 60 DEG C.
The preparation method of reversible temperature indicating powder coating as above, step is as follows:
Add all materials to high speed mixer, after dry blending, be added to forcing machine, district's temperature is 75-85 DEG C, two district's temperature are 90-100 DEG C, carry out melting, mixing, extrude, cool, compressing tablet, then through pulverizer pulverizing, classification, sieve, pack, obtain reversible temperature indicating powder coating.
The using method of reversible temperature indicating powder coating as above, by reversible temperature indicating powder paint in metallic surface, 180 ± 5 DEG C are toasted 15 ± 5 minutes.
Advantage of the present invention and positively effect are:
1, the present invention's reversible temperature indicating powder coating is a kind of decoration type powder coating of attractive appearance, and having again can indicated temperature functional, shows specific color at a certain temperature, and reaches discoloring temperature instant color-changing; When environmental requirement improves day by day, abandon solvent-borne type allochroic paint in the past, have employed the powder coating form of solvent-free releasing; This powder coating has higher tint retention, the longer variable color life-span, and has splendid ornamental and weathering resistance, and hardness also can reach 2H-3H, has longer work-ing life, more durable; Meanwhile, this powder coating both may be used for open air, also may be used for indoor, expanded its use range, reduced the production cost of enterprise.
2, the resin that powder coating of the present invention adopts is GMA type acrylic resin (i.e. glycidyl methacrylate type acrylic resin), the powder coating of acrylic system has high tint retention, the variable color life-span of reversible temperature indicating powder can be extended, and there is high-decoration attractive in appearance and splendid chemical resistant properties and physicals, there is again the function that can indicate specified temp.
3, the acrylic type flow agent that powder coating of the present invention adopts is a kind of acrylic copolymer with splendid recoatability and ply adhesion performance, eliminates surface imperfection, improves clarity and the transparency of film.
4, powder coating of the present invention adopts anti-yellowing change st-yrax as defoamer, both can play the effect of froth breaking and the surperficial levelling of improvement, and can reduce again the generation of high temperature to the Yellowing that resin and pigment bring, ensure that the bright-coloured degree of this powder film.
5, powder coating of the present invention adopts the camouflage paint of microencapsulation material, can heatproof to 200 DEG C, its principle is the phase transformation that can be caused by temperature, the transfer etc. in organic compound of the change of molecular arrangement or electronics, and variation with temperature constantly changes, there is reversibility and unlimited repeatability.
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The method used in the present invention, if no special requirements, is ordinary method; The reagent used in the present invention, if no special requirements, is commercially available prod.
In the present invention, the hydroxyl value of GMA type acrylic resin is 18-50mgKOH/g, and epoxy equivalent (weight) is 430-500g/mol, and such as it can be can be the EP-455 of ESTRON company, EP-555 etc.
The reversible temperature-sensitive camouflage paint used in the present invention is microencapsulation material, repeatedly unlimitedly can produce colour-change according to temperature.
Embodiment 1:
A kind of reversible temperature indicating powder coating, its raw material form component and parts by weight as follows:
The preparation method of above-mentioned reversible temperature indicating powder coating, step is as follows:
Above-mentioned material is added to high speed mixer, forcing machine is added to after dry blending, one district's temperature is 80-90 DEG C, two district's extrusion temperatures be 110-120 DEG C carry out melting, mixing, extrude, cool, compressing tablet, again through pulverizer pulverizing, classification, sieve, pack, become the powder coating final product of particle diameter suitable (generally at 32-36um), obtain reversible temperature indicating powder coating.
The using method of above-mentioned reversible temperature indicating powder coating is as follows:
By this reversible temperature indicating powder paint in metallic surface, or be sprayed on priming paint, 180 DEG C are toasted 15 minutes, spray after ground drop priming especially, effect is better.This reversible temperature indicating powder coating is as clear top powder coatings, existing attractive in appearance ornamental, has again high corrosion-resistant and high rigidity characteristic.
Embodiment 2:
A kind of reversible temperature indicating powder coating, its raw material form component and parts by weight as follows:
The preparation method of above-mentioned reversible temperature indicating powder coating and using method are with embodiment 1.
Embodiment 3:
A kind of reversible temperature indicating powder coating, its raw material form component and parts by weight as follows:
The practical application effect of powder coating of the present invention and test situation:
For checking practical application effect of the present invention, concrete operations are as follows: powder paint embodiment 1 prepared is through parkerized metallic surface, put into high temperature oven through 180 DEG C/15-20 minute baking, make it completion of cure, taking-up exemplar cools, and obtains exemplar A, and powder coating obtained for example 2,3 is made exemplar, making method with embodiment 1, the exemplar B obtained and exemplar C.Main doing the possibility of reversal warm nature of A, B and C is compared.
First, powder coating of the present invention has been carried out to the detection of the test item in table 1, detected result is in table 1.
Film shock-resistance is undertaken by GB/T1732-1993 regulation;
Coating film gloss degree, by the regulation of GB/T9754, is tested with 60 ° of angles;
Hardness of film is undertaken by the regulation of GB/T6739-2006;
Coating alkali resistance is undertaken by first method (infusion method) in GB/T9274-1988;
Coating acid resistance is undertaken by first method (infusion method) in GB/T9274-1988;
The correlation detection repertory of table 1 powder coating of the present invention
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Outward appearance | Smooth surface is smooth, carefully full | Smooth surface is smooth, full | Smooth surface is smooth, full |
| Gloss | ≥95° | ≥95° | ≥95° |
| Impact | By positive and negative 50KG | By positive and negative 50KG | By positive and negative 50KG |
| Coating hardness | 3H | 3H | 3H |
| Ageing resistance (QUV) | 1500h, variable color≤2 grade | 1500h, variable color≤2 grade | 1500h, variable color≤2 grade |
| Alkali resistance | Without exception/450h | Without exception/450h | Without exception/450h |
| Acid resistance | Without exception/450h | Without exception/450h | Without exception/450h |
| Hot water resistance (95 DEG C/2h) | Without exception | Without exception | Without exception |
| Reversibility (colding and heat succeed each other) | >=10000 times | >=10000 times | >=10000 times |
Can be found out by the detected result of table 1, the detected result of three embodiments is identical, just discoloring temperature is different with the color of change, combination according to different camouflage paint is described, the reversible thermocoating of a series of color change interval can be done, and this invention has good decorate properties and splendid weathering resistance, chemical resistant properties, resistance to boiling water, and after 95 DEG C/2h, after colding and heat succeed each other color can change more than 10000 times (test only accomplish 10000 times, the sign that colour change function does not weaken), its discoloring temperature is different according to the difference of pigment, its color change interval can accomplish 30 DEG C-200 DEG C, the invention solves the expensive and problem of the tint retention difference of ordinary powder of camouflage paint, also the pollution problem that causes of the common liquid coating of customer service, there is more wide application prospect.
Claims (2)
1. a reversible temperature indicating powder coating, is characterized in that: its raw material form component and parts by weight as follows:
The hydroxyl value of described GMA type acrylic resin is 18-50mgKOH/g, and epoxy equivalent (weight) is 430-500g/mol;
Described flow agent is acrylate type flow agent;
Described reversible temperature-sensitive camouflage paint is microencapsulation material;
The discoloring temperature scope of described heat discoloration pigment is 40 DEG C ~ 60 DEG C;
The preparation method of described reversible temperature indicating powder coating, step is as follows:
Add all materials to high speed mixer, after dry blending, be added to forcing machine, district's temperature is 75-85 DEG C, two district's temperature are 90-100 DEG C, carry out melting, mixing, extrude, cool, compressing tablet, then through pulverizer pulverizing, classification, sieve, pack, obtain reversible temperature indicating powder coating.
2. a using method for reversible temperature indicating powder coating as claimed in claim 1, is characterized in that: by reversible temperature indicating powder paint in metallic surface, and 180 ± 5 DEG C are toasted 15 ± 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310600785.1A CN103614043B (en) | 2013-11-21 | 2013-11-21 | A kind of reversible temperature indicating powder coating and preparation method thereof and using method |
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| CN201310600785.1A CN103614043B (en) | 2013-11-21 | 2013-11-21 | A kind of reversible temperature indicating powder coating and preparation method thereof and using method |
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| CN103614043A CN103614043A (en) | 2014-03-05 |
| CN103614043B true CN103614043B (en) | 2016-02-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712122A (en) * | 2015-02-05 | 2015-06-17 | 中山市极地阳光木业有限公司 | Temperature control color-variable decorative sheet |
| CN105176331A (en) * | 2015-09-25 | 2015-12-23 | 科威嘉粉末涂料（天津）有限公司 | Acrylic acid and silicon-aluminum composite high-heat-dissipation powder coating for engine |
| CN106380143A (en) * | 2016-08-30 | 2017-02-08 | 派丽(上海)管理有限公司 | Temperature-variable cement-based colored caulking compound with lasting effect |
| CN106479312A (en) * | 2016-09-23 | 2017-03-08 | 北京新能源汽车股份有限公司 | A kind of thermo-color and its application |
| CN106336779B (en) * | 2016-09-23 | 2019-01-18 | 北京新能源汽车股份有限公司 | A kind of thermo-color and its application |
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|---|---|---|---|---|
| JP2004346257A (en) * | 2003-05-26 | 2004-12-09 | Pilot Ink Co Ltd | Thermochromic liquid composition having metallic gloss |
| CN101085764A (en) * | 2007-07-09 | 2007-12-12 | 南京林业大学 | Synthesis method for (methyl)glycidyl acrylate |
| JP4347749B2 (en) * | 2004-06-02 | 2009-10-21 | パイロットインキ株式会社 | Thermosensitive color-change color memory laminate |
| CN101712834A (en) * | 2009-11-27 | 2010-05-26 | 广州擎天实业有限公司 | Doodling prevention powder coating and preparation method thereof |
| CN103391984A (en) * | 2011-02-24 | 2013-11-13 | 株式会社樱花彩色笔 | Thermochromic composition |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004346257A (en) * | 2003-05-26 | 2004-12-09 | Pilot Ink Co Ltd | Thermochromic liquid composition having metallic gloss |
| JP4347749B2 (en) * | 2004-06-02 | 2009-10-21 | パイロットインキ株式会社 | Thermosensitive color-change color memory laminate |
| CN101085764A (en) * | 2007-07-09 | 2007-12-12 | 南京林业大学 | Synthesis method for (methyl)glycidyl acrylate |
| CN101712834A (en) * | 2009-11-27 | 2010-05-26 | 广州擎天实业有限公司 | Doodling prevention powder coating and preparation method thereof |
| CN103391984A (en) * | 2011-02-24 | 2013-11-13 | 株式会社樱花彩色笔 | Thermochromic composition |
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