CN103773228A - Special black paint for absorbing solar energy and preparation method thereof - Google Patents
Special black paint for absorbing solar energy and preparation method thereof Download PDFInfo
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- CN103773228A CN103773228A CN201310750454.6A CN201310750454A CN103773228A CN 103773228 A CN103773228 A CN 103773228A CN 201310750454 A CN201310750454 A CN 201310750454A CN 103773228 A CN103773228 A CN 103773228A
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Abstract
The invention discloses a special black paint for absorbing solar energy. The black paint comprises the following raw materials: 10-30 parts of ethyl cellulose, 35-50 parts of organic silicon resin, 25-45 parts of iron oxide black, 2-15 parts of copper powder, 0.1-5 parts of dispersing agent, and 5-20 parts of organic solvent. Accordingly, the invention also discloses a preparation method for the special black paint for absorbing solar energy. The preparation method comprises steps of firstly throwing the organic silicon resin and ethyl cellulose into a reaction cylinder, then adding the dispersing agent and mixing uniformly through stirring, adding the copper powder, finally adding the iron oxide black, dispersing for 20-50 minutes at high speed; after dispersing at high speed, throwing into a sand mill for grinding, then adding organic solvent, regulating the viscosity of the paint, filtering, packaging so as to obtain the finished product. The black paint has high solar energy absorption rate, good heat resistance and high overall performance.
Description
Technical field
The present invention relates to paint field, particularly special black paint of a kind of solar absorption and preparation method thereof.
Background technology
The worsening shortages of the energy is the significant problem that the world today faces, and sun power has advantages of clean, inexhaustiblely because of it, becomes the important channel that solves energy shortage problem.Sun power coating is the gordian technique during sun power utilizes, most important to the efficiency of raising solar collector.
Existing solar collector generally comprises steel pipe, is sprayed with black paint on steel pipe, and this solar collector utilizes black paint to absorb sun power.But it is pigment that existing black paint generally adopts common carbon black, its solar absorptance is not high, thermotolerance is bad, over-all properties is poor.
Summary of the invention
Technical problem to be solved by this invention is, provides that a kind of solar absorptance is high, good heat resistance, black paint that over-all properties is high.
Technical problem to be solved by this invention is also, a kind of method of preparing above-mentioned black paint is provided.
For reaching above-mentioned technique effect, the invention provides the special black paint of a kind of solar absorption, it is mainly obtained by the raw material preparation of following weight part:
As the improvement of such scheme, the special black paint of described solar absorption is mainly obtained by the raw material preparation of following weight part:
As the improvement of such scheme, the solid masses of described silicone resin is 40-60% containing number; The solid masses of described ethyl cellulose is 10-30% containing number.
As the improvement of such scheme, the solid masses of described silicone resin is 50% containing number; The solid masses of described ethyl cellulose is 20% containing number.
As the improvement of such scheme, described organic solvent is vinyl acetic monomer.
Accordingly, the invention also discloses the preparation method of the special black paint of a kind of solar absorption, comprising:
First silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 20-50 minute;
After high speed dispersion, drop into sand mill and carry out milled processed, then add organic solvent, adjusting coating viscosity, filtration, packing, obtain finished product;
Wherein, the special black paint of described solar absorption is mainly obtained by the raw material preparation of following weight part:
As the improvement of such scheme, while adding iron oxide black, temperature≤50 ℃ of dispersion.
As the improvement of such scheme, when described sand mill grinds, temperature≤80 ℃ of grinding, the fineness of grinding is 50um-60um.
As the improvement of such scheme, while adding described organic solvent, the viscosity of described coating is transferred to 2500-3000Mpa.s.
As the improvement of such scheme, the special black paint of described solar absorption is mainly obtained by the raw material preparation of following weight part:
As the improvement of such scheme, the solid masses of described silicone resin is 40-60% containing number; The solid masses of described ethyl cellulose is 10-30% containing number.
As the improvement of such scheme, the solid masses of described silicone resin is 50% containing number; The solid masses of described ethyl cellulose is 20% containing number.
As the improvement of such scheme, described organic solvent is vinyl acetic monomer.
Implement the present invention and there is following beneficial effect:
The special black paint of solar absorption provided by the invention, adopting ethyl cellulose, silicone resin, iron oxide black, copper powder, dispersion agent and organic solvent is raw material.Wherein, it is take silicone resin, ethyl cellulose as base-material, iron oxide black (Z 250, chemical formula Fe
3o
4) be pigment, after the black paint making is coated on base material, surface forms coarse concave-convex sense, has increased surface-area, has greatly improved the specific absorption of sun power.Meanwhile, due to the synergy of each raw material, the present invention, improving under the prerequisite of solar absorptance, has also improved the dry speed of coating, and has had good thermotolerance and sticking power.Especially when ethyl cellulose: silicone resin:, it is better that the performance of each side can reach, good combination property when iron oxide black=15～25:40～45:30～the 40.
The present invention is aided with copper powder on the basis of ethyl cellulose, silicone resin, iron oxide black, and the copper powder of consumption 2～15 can form alloy layer with steel substrate in temperature-rise period, has greatly improved over-all properties.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below the present invention is described in further detail.
Existing black paint can not meet that solar absorptance is high simultaneously, good heat resistance, the high requirement of over-all properties.
For this reason, the invention provides the special black paint of a kind of solar absorption, it is mainly obtained by the raw material preparation of following weight part:
Preferably, the special black paint of described solar absorption is mainly obtained by the raw material preparation of following weight part:
Wherein, (one) is about silicone resin:
In the case of the kind consumption of other components is all identical, the fundamental property of silicone resin has a great impact coating thermotolerance, specific as follows:
As from the foregoing, heat resistance of organic silicon resin can increase along with the increase of amount, that is, the consumption of silicone resin is larger, and thermotolerance is also better, and silicone resin is applicable to doing heat resisting coating.
But, at the black paint for absorbing sun power, in the time that the consumption of silicone resin is greater than 50%, can affect the specific absorption of sun power.Therefore, the present invention selects 35～50% silicone resin.
Further, the solid masses of described silicone resin is preferably 40-60% containing number; Better, the solid masses of described silicone resin is 50% containing number.
(2) about ethyl cellulose
In the case of the kind consumption of other components is all identical, the consumption of ethyl cellulose has important impact to rapid-curing cutback performance, specific as follows:
| 20% ethyl cellulose | Surface drying time/min | Empty dry time/h |
| 10 | 25 | 20 |
| 15 | 18 | 15 |
| 20 | 15 | 12 |
As from the foregoing, the consumption of ethyl cellulose affects the dry speed of coating, and the consumption of ethyl cellulose is more, and dry speed is faster.
But at the black paint for absorbing sun power, in the time that the consumption of ethyl cellulose is greater than 30%, described black paint is the sticking power of quick-drying, reduction black paint and base material too.Therefore, the present invention selects 10～30% ethyl cellulose.
Further, the solid masses of described ethyl cellulose is preferably 10-30% containing number; The solid masses of described ethyl cellulose is 20% containing number.
(3) about iron oxide black
In the each component of black paint, pigment is very large on the absorption of solar energy impact of coating, in the case of the kind consumption of other components is all identical, study respectively the iron oxide black of four kinds of Different adding amounts and the impact on solar absorptance of the common iron oxide black that adopts at present, specific as follows:
| Pigment (quality/g) | Solar absorptance % |
| Common carbon black/20g | 50.8 |
| Iron oxide black/20g | 93.5 |
| Iron oxide black/30g | 95.57 |
| Iron oxide black/35g | 96.8 |
| Iron oxide black/40g | 98.3 |
| Iron oxide black/45g | 99.5 |
As from the foregoing, be pigment if adopt common carbon black in coating, solar absorptance is lower, is only 50% left and right.If be pigment and adopt iron oxide black in coating, solar absorptance obviously increases, and reaches more than 90%.And along with the increase of the consumption of iron oxide black, solar absorptance raises.Therefore iron oxide black is suitable as sun power high-absorbility coating.
In sum, the special black paint of solar absorption provided by the invention, adopting ethyl cellulose, silicone resin, iron oxide black, copper powder, dispersion agent and organic solvent is raw material.Wherein, it is take silicone resin, ethyl cellulose as base-material, and iron oxide black (Z 250, chemical formula Fe3O4) is pigment, after the black paint making is coated on base material, surface forms coarse concave-convex sense, has increased surface-area, has greatly improved the specific absorption of sun power.Meanwhile, due to the synergy of each raw material, the present invention, improving under the prerequisite of solar absorptance, has also improved the dry speed of coating, and has had good thermotolerance and sticking power.Especially when ethyl cellulose: silicone resin:, it is better that the performance of each side can reach, good combination property when iron oxide black=15～25:40～45:30～the 40.
In addition, the present invention is aided with copper powder on the basis of ethyl cellulose, silicone resin, iron oxide black, and the copper powder of consumption 2～15 can form alloy layer with steel substrate in temperature-rise period, has greatly improved over-all properties.
Further, described organic solvent is preferably vinyl acetic monomer.Described iron oxide black, copper powder are preferably technical grade.
Accordingly, the invention also discloses the preparation method of the special black paint of a kind of solar absorption, comprising:
One, first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 20-50 minute.
Preferably, while adding iron oxide black, the time of high speed dispersion is 30 minutes, temperature≤50 ℃ of dispersion.
The present invention requires the temperature of disperseing to be no more than 50 ℃, and this is because in the time that temperature is greater than 50 ℃, and flocculation reaction easily occurs, and component (as silicone resin) was lost efficacy, and reduces the quality of product.
Two, after high speed dispersion, drop into sand mill and carry out milled processed, then add organic solvent, adjusting coating viscosity, filtration, packing, obtain finished product.
Preferably, when described sand mill grinds, temperature≤80 ℃ of grinding.The present invention requires the temperature of grinding to be no more than 80 ℃, and this is that the color of paint easily changes, and affects the outward appearance of product because in the time that temperature is greater than 80 ℃.
Preferably, when described sand mill grinds, the fineness of grinding is 50um-60um.The fineness that the present invention grinds is preferably 50um-60um, and within the scope of this, the granularity of black paint finished product just meets the requirement of solar absorption.If the fineness of grinding is less than 50um, can reduce the degree of roughness of black paint formation coating, reduce the surface-area of coating, and then reduce solar absorptance; If the fineness of grinding is greater than 60um, affect the outward appearance of coating.
Preferably, while adding described organic solvent, the viscosity of described coating is transferred to 2500-3000Mpa.s.The viscosity of coating of the present invention is preferably transferred to 2500-3000Mpa.s, can meet well the process requirements of product.
It should be noted that, the composition of raw materials that the special black paint preparation method of this solar absorption adopts, with aforesaid consistent, does not repeat them here.
Further set forth the present invention with specific embodiment below
Embodiment 1
1, raw material: ethyl cellulose 10g, silicone resin 50g, iron oxide black 25g, copper powder 5g, dispersion agent 1g, ethyl acetate 9g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 30 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 50um, then adds ethyl acetate, and dope viscosity is transferred to 2500Mpa.s, filtration, packing, obtains finished product.
Embodiment 2
1, raw material: ethyl cellulose 30g, silicone resin 35g, iron oxide black 25g, copper powder 3g, dispersion agent 1g, ethyl acetate 6g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 35 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 60um, then adds ethyl acetate, and dope viscosity is transferred to 3000Mpa.s, filtration, packing, obtains finished product.
Embodiment 3
1, raw material: ethyl cellulose 15g, silicone resin 40g, iron oxide black 35g, copper powder 2.5g, dispersion agent 0.5g, ethyl acetate 7g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 28 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 55um, then adds ethyl acetate, and dope viscosity is transferred to 2800Mpa.s, filtration, packing, obtains finished product.
Embodiment 4
1, raw material: ethyl cellulose 20g, silicone resin 35g, iron oxide black 30g, copper powder 4.5g, dispersion agent 0.5g, ethyl acetate 10g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 30 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 50umum, then adds ethyl acetate, and dope viscosity is transferred to 2500Mpa.s, filtration, packing, obtains finished product.
Embodiment 5
1, raw material: ethyl cellulose 10g, silicone resin 35g, iron oxide black 40g, copper powder 9.5g, dispersion agent 0.5g, ethyl acetate 5g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 40 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 60um, then adds ethyl acetate, and dope viscosity is transferred to 2600Mpa.s, filtration, packing, obtains finished product.
Comparative example 1
1, raw material: ethyl cellulose 20g, silicone resin 40g, common carbon black 30g, dispersion agent 1g, ethyl acetate 9g.
2, preparation method: first silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, finally add common carbon black, high speed dispersion 30 minutes, dispersion temperature is 40 ℃; After high speed dispersion, drop into sand mill and carry out milled processed, grinding temperature is 75 ℃, is ground to fineness to 50um, then adds ethyl acetate, and dope viscosity is transferred to 2500Mpa.s, filtration, packing, obtains finished product.
The black paint of embodiment 1-5 and comparative example 1 gained is carried out to technology for detection, and result is as follows:
As from the foregoing, under the promoter action of other raw materials outside iron oxide black, the present invention is more taller than the solar absorptance of single interpolation iron oxide black.For example, aforesaid while adding 45g iron oxide black, solar absorptance is 99.5%.And in embodiment 1-4, it adds the iron oxide black of 25-35g, its solar absorptance can reach 99.5%.
Therefore, under the synergy of raw material ethyl cellulose, silicone resin, iron oxide black, copper powder, dispersion agent and organic solvent, the present invention has improved the specific absorption of sun power greatly, and has good thermotolerance, sticking power and outward appearance, and dry speed is also very fast.
It should be noted that, in above-described embodiment 1-5, described ethyl cellulose is selected EK-70, mass fraction of solids 20%; It is 50% containing number that described silicone resin is selected S-2262A, solid masses; Described dispersion agent is selected vapour Bagong department 4010 dispersion agents.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. the special black paint of solar absorption, is characterized in that, it is mainly obtained by the raw material preparation of following weight part:
2. the special black paint of solar absorption as claimed in claim 1, is characterized in that, it is mainly obtained by the raw material preparation of following weight part:
3. the special black paint of solar absorption as claimed in claim 1, is characterized in that, the solid masses of described silicone resin is 40-60% containing number;
The solid masses of described ethyl cellulose is 10-30% containing number.
4. the special black paint of solar absorption as claimed in claim 3, is characterized in that, the solid masses of described silicone resin is 50% containing number;
The solid masses of described ethyl cellulose is 20% containing number.
5. the special black paint of solar absorption as claimed in claim 1, is characterized in that, described organic solvent is vinyl acetic monomer.
6. a method of preparing the special black paint of solar absorption as described in claim 1-5 any one, is characterized in that, comprising:
First silicone resin and ethyl cellulose are dropped in reaction cylinder, then add dispersion agent to stir, then add copper powder, finally add iron oxide black, high speed dispersion 20-50 minute;
After high speed dispersion, drop into sand mill and carry out milled processed, then add organic solvent, adjusting coating viscosity, filtration, packing, obtain finished product;
Wherein, the special black paint of described solar absorption is mainly obtained by the raw material preparation of following weight part:
7. the preparation method of the special black paint of solar absorption as claimed in claim 6, is characterized in that, while adding described iron oxide black, and temperature≤50 ℃ of dispersion.
8. the preparation method of the special black paint of solar absorption as claimed in claim 6, is characterized in that, when described sand mill grinds, and temperature≤80 ℃ of grinding, the fineness of grinding is 50um-60um.
9. the preparation method of the special black paint of solar absorption as claimed in claim 6, is characterized in that, while adding described organic solvent, the viscosity of described coating is transferred to 2500-3000Mpa.s.
10. the preparation method of the special black paint of solar absorption as claimed in claim 6, is characterized in that, the solid masses of described silicone resin is 40-60% containing number;
The solid masses of described ethyl cellulose is 10-30% containing number;
Described organic solvent is vinyl acetic monomer.
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| CN201310750454.6A CN103773228B (en) | 2013-12-31 | 2013-12-31 | Special black paint for solar energy absorption and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777933A (en) * | 2020-06-10 | 2020-10-16 | 惠州市奥亚皇冠涂料有限公司 | Aqueous two-component white elastic wood finish and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550315A (en) * | 2009-05-15 | 2009-10-07 | 泰州市四联化工有限公司 | Black organic-silicon heat-resisting paint and preparation method thereof |
| KR20120046523A (en) * | 2010-11-02 | 2012-05-10 | 한국전기연구원 | Heat-radiant solution-processible composites and heat-radiant composite films fabricated using well-dispersed composites |
| CN103342960A (en) * | 2013-06-27 | 2013-10-09 | 天长市巨龙车船涂料有限公司 | Black organic silicon heat resisting paint and preparation method thereof |
| CN103409020A (en) * | 2013-08-14 | 2013-11-27 | 东莞劲胜精密组件股份有限公司 | Coating for circuit of LDS shell |
-
2013
- 2013-12-31 CN CN201310750454.6A patent/CN103773228B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550315A (en) * | 2009-05-15 | 2009-10-07 | 泰州市四联化工有限公司 | Black organic-silicon heat-resisting paint and preparation method thereof |
| KR20120046523A (en) * | 2010-11-02 | 2012-05-10 | 한국전기연구원 | Heat-radiant solution-processible composites and heat-radiant composite films fabricated using well-dispersed composites |
| CN103342960A (en) * | 2013-06-27 | 2013-10-09 | 天长市巨龙车船涂料有限公司 | Black organic silicon heat resisting paint and preparation method thereof |
| CN103409020A (en) * | 2013-08-14 | 2013-11-27 | 东莞劲胜精密组件股份有限公司 | Coating for circuit of LDS shell |
Non-Patent Citations (2)
| Title |
|---|
| 李芳等编著: "《建筑涂装工程问答实录》", 31 January 2008, 机械工业出版社 * |
| 甘肃油漆厂涂料工业研究所主编: "《涂料品种》", 31 August 1973, 燃料化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777933A (en) * | 2020-06-10 | 2020-10-16 | 惠州市奥亚皇冠涂料有限公司 | Aqueous two-component white elastic wood finish and preparation method thereof |
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