CN101434823A - Core-shell structured reflecting material and preparation thereof - Google Patents
Core-shell structured reflecting material and preparation thereof Download PDFInfo
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- CN101434823A CN101434823A CNA2007101852723A CN200710185272A CN101434823A CN 101434823 A CN101434823 A CN 101434823A CN A2007101852723 A CNA2007101852723 A CN A2007101852723A CN 200710185272 A CN200710185272 A CN 200710185272A CN 101434823 A CN101434823 A CN 101434823A
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Abstract
The invention provides a reflective material of a core-shell structure and a preparation method thereof, in particular to a reflective material which uses stainless steel, glass, ceramic or plastic grains as the core and uses high refractive index glass bead as the shell structure, and a preparation method thereof, belonging to the field of material preparation. The reflective material with different specific gravities has different suspension performances in the fluid, thus solving the construction difficult problem that the reflective glass beads sink excessively fast or do not sink during the marking construction. As the core is made of relatively cheap material and used for supporting the shell structure which is formed by the glass beads with high refractive index, thus meeting the requirement of high refractive index of the reflective material and greatly reducing the cost.
Description
One, technical field
The present invention has light reflecting material of nucleocapsid structure and preparation method thereof and belongs to field of material preparation.In particular to a kind of be nuclear with stainless steel, glass, pottery or plastic grain, be light reflecting material of shell structure and preparation method thereof with the high refractive index glass micro pearl.
Two, technical background
Graticule has become an important component part of road construction, and at present, people no longer have been whether the discussion graticule is effective to the discussion of graticule material, but the most effectively graticule system that how can provide with minimum input is being provided.The graticule system is in the validity at night, retroreflecting is vital, the purpose that graticule exists is exactly to provide visual guiding for the driver, relevant with nighttime visibility is exactly the retroreflecting of graticule, and the retroreflecting of graticule mainly is to be achieved by the retrodirective reflection of light reflecting material to light.
Being applied at present in the facilities such as road sign, graticule as reflective medium, mainly is the spherical glass microballon with the light reflecting material that necessary retroreflecting is provided.In early days, once in gage mark coating and graticule, adopted glass cullet, copper, aluminium matter spheroid as light reflecting material, but these materials show very undesirable in the application of reality, and reason is that above-mentioned material one-tenth circle rate is relatively poor or is exactly that refraction effect is undesirable.
Current, glass microballon has two places that have much room for improvement, one, the density of glass microballon in the construction of gage mark coating.The specific gravity difference that is used for the working viscosity of graticule material of graticule construction and material at present is very big, and the proportion of glass microballon is very single, and construction brings very big trouble to graticule for this.Glass microballon in the construction of graticule because the density difference of graticule material and glass microballon is excessive, in low viscous graticule construction, sink easily, and in the full-bodied graticule construction of quick-dry type, be difficult to, can only adopt spray gun that glass microballon is carried out sprayed construction, bring very big trouble to construction, in order to improve the suspension property of granulated glass sphere in coating, developed a kind of Hollow Glass Sphere abroad with suspension property, this granulated glass sphere can suspend in low viscous wet film and be difficult for sinking to fully and go in filming, studies show that and adopt the suspension granulated glass sphere to spread the initial retro-reflecting coefficient value that granulated glass sphere can significantly improve graticule as face, promptly significantly improve the reflecting effect at night of roadmarking, certainly, the price of suspension granulated glass sphere also is comparatively considerable; Its two, improve the specific refractory power of glass microballon.The specific refractory power of granulated glass sphere is high more, then has the sight line that many more light is reflected back to the driver, and the intensity of reflection ray will be high more.The specific refractory power that is used for the granulated glass sphere of road mark paint or graticule is generally 1.50, these granulated glass spherees generally all are to adopt the discarded glass that reclaims to carry out processing and manufacturing, the granulated glass sphere of high refractive index is generally by the chemical process synthetic, carry out through batching in other words conj.or perhaps that sintering forms by chemical process, rather than be raw material with the discarded glass, specific refractory power is more than 1.9-2.3.Although along with the raising of the specific refractory power of granulated glass sphere can obtain higher glistening intensity, but, it is 1.5 granulated glass sphere that the reflective beads that is used for road mark paint at present still adopts specific refractory power mostly, mainly is because the price of the glass microballon of high refractive index is extremely expensive.
Three, summary of the invention
It is nuclear with stainless steel, glass, pottery or plastic grain that light reflecting material of nucleocapsid structure of the present invention and preparation method thereof, purpose are to provide a kind of, is the light reflecting material of shell structure with the high refractive index glass micro pearl.Will be as the particulate material of nuclear by twice surface treatment, and then apply one deck and have the reflective glass beads of high refractive index, thus obtain that a kind of proportion can be regulated, the light reflecting material with nucleocapsid structure of high refractive index.This light reflecting material with different specific weight has different suspension properties in fluid, so can solve reflective glass beads in graticule construction otherwise sink too fast, or the construction difficult problem that does not sink; Because nuclear adopts cheap relatively material in order to the supporting of shell structure that the glass microballon with high refractive index is formed, and has both improved the specific refractory power of light reflecting material, greatly reduces cost simultaneously again.
The light reflecting material of nucleocapsid structure of the present invention is characterized in that it being a kind ofly to serve as nuclear and be the light reflecting material of shell structure with the high refractive index glass micro pearl with stainless steel, glass, pottery or plastic grain.Light reflecting material of above-mentioned nucleocapsid structure and preparation method thereof is characterized in that step is carried out in the following order:
1. He the surface treatment first time.To directly polish as the particulate material outside surface of nuclear, or handle the metal plating that plates one deck 0-50 μ m at particulate material outside surface as nuclear by chemical plating or vacuum hot dip.
2. He the surface treatment second time.Will through above-mentioned surface-treated as the material soaking of nuclear in adhesives, filter then.
3. will mix by the volume ratio of 1:0～1:1 with the glass microballon of high refractive index as the particle of examining through the surface-treated second time, stir, and be heated to 50-120 ℃ and solidify 1-12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
The material that is used as nuclear described in the above-mentioned light reflecting material with nucleocapsid structure can be a kind of in stainless steel, glass, plastics or the ceramic particle, and its particle size can be 20～80 orders, and above-mentioned particulate is meant the ball-type or the non-rule particle of rule; Above-mentioned plastics are meant a kind of in polyvinyl chloride or the tetrafluoroethylene; Above-mentioned polishing is meant in 1000 purpose quartz sands carries out mechanical stirring, and 80 rev/mins of stir speed (S.S.)s, churning time are 2h, to realize the particulate material outside surface polishing as nuclear; Metal plating can be a kind of in zinc, silver, aluminium, chromium or the copper; Described adhesives can be a kind of in heat-curing type Resins, epoxy, polyamine fat resin or the acrylate resin; The specific refractory power of the glass microballon of the above-mentioned high refractive index that is used as the shell material is 1.9～2.3, and it is of a size of 100～400 orders.
Anti-settling light reflecting material of nucleocapsid structure of the present invention and preparation method thereof has the following advantages:
(1) different suspension effects.Owing to select for use stainless steel, glass, plastics or ceramic particle to examine, can obtain the material of different specific weight, thereby obtain having the light reflecting material of different suspension effects with different specific weight.
(2) economic results in society height.Utilize relatively inexpensive material to be nuclear, and be shell, saved the consumption of high-index material greatly, effectively saved resources costs, have higher economic results in society with the glass microballon of the high refractive index of costliness.
(3) rainy night, is reflective.Gained has the light reflecting material of nucleocapsid structure owing to through above-mentioned surface treatment, still incident light can be reflected in water, thereby obtains having the light reflecting material of rainy night reflective function.
Four, embodiment
Embodiment 1:
With size is that 20-40 purpose Stainless Steel Ball carries out mechanical stirring in 1000 purpose quartz sands, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, the volume ratio of Stainless Steel Ball: quartz sand=1:10, filter out quartz sand then, to realize to particulate material outside surface polishing as nuclear.To impregnated in the Resins, epoxy 1 hour through the Stainless Steel Ball of polishing, filter then.With Stainless Steel Ball after the above-mentioned filtration and specific refractory power is 1.9, granularity be 100-200 purpose glass microballon by volume for the mixed of 1:0.3, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 2:
With size is that 40-80 purpose Stainless Steel Ball carries out mechanical stirring in 1000 purpose quartz sands, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, the volume ratio of Stainless Steel Ball: quartz sand=1:10, filter out quartz sand then, to realize to particulate material outside surface polishing as nuclear.To impregnated in the thermohardening type polyamine fat resin 1 hour through the Stainless Steel Ball of polishing, filter then.With Stainless Steel Ball after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 80 ℃, solidify 5h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 3:
With size is that 40-80 purpose Stainless Steel Ball carries out mechanical stirring in 1000 purpose quartz sands, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, the volume ratio of Stainless Steel Ball: quartz sand=1:10, filter out quartz sand then, to realize to particulate material outside surface polishing as nuclear.To impregnated in the Resins, epoxy 1 hour through the Stainless Steel Ball of polishing, filter then.With Stainless Steel Ball after the above-mentioned filtration and specific refractory power is 2.3, granularity be 200-400 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 120 ℃, solidify 1h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 4:
With size is that 30-60 purpose ceramic microsphere is in carry out mechanical stirring in 1000 purpose quartz sands, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, the volume ratio of ceramic microsphere: quartz sand=1:10, filter out quartz sand then, to realize to particulate material outside surface polishing as nuclear.To impregnated in the Resins, epoxy 1 hour through the ceramic microsphere of polishing, filter then.With ceramic microsphere after the above-mentioned filtration and specific refractory power is 1.9, granularity be 100-200 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 80 ℃, solidify 5h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 5:
With size is that 30-60 purpose ceramic microsphere carries out mechanical stirring in 1000 purpose quartz sands, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, ceramic microsphere: quartz sand=1:: 10 volume ratio, filter out quartz sand then, to realize to particulate material outside surface polishing as nuclear.To impregnated in the thermal-curable acrylic resin 1 hour through the ceramic microsphere of polishing, filter then.With ceramic microsphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 120 ℃, solidify 3h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 6:
The method that is 40-60 purpose ceramic grain surface by chemical plating with size plates the argent that a layer thickness is 10 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With ceramic particle after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 80 ℃, solidify 5h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 7:
The method that is 20-30 purpose ceramic grain surface by chemical plating with size plates the argent that a layer thickness is 30 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With ceramic particle after the above-mentioned filtration and specific refractory power is 2.2, granularity be 100-200 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 120 ℃, solidify 1h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 8:
The method that is 40-80 purpose ceramic grain surface by chemical plating with size plates the metallic aluminium that a layer thickness is 50 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With ceramic particle after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.7, stir then, be heated to 120 ℃, solidify 1h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 9:
The method that is 30-60 purpose ceramic grain surface by the vacuum hot dip with size plates the metallic copper that a layer thickness is 20 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With ceramic particle after the above-mentioned filtration and specific refractory power is 2.3, granularity be 300-400 purpose glass microballon by volume for the mixed of 1:0.9, stir then, be heated to 120 ℃, solidify 1h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 10:
The method that is 20-80 purpose ceramic grain surface by the vacuum hot dip with size plates the metallic zinc that a layer thickness is 30 μ m, impregnated in the polyamine fat resin 1 hour then, filters.With ceramic particle after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 11:
With size is that 20-80 purpose glass sphere impregnated in the polyamine fat resin 1 hour, filters.With glass sphere after the above-mentioned filtration and specific refractory power is 1.9, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.1, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 12
The method that is 20-80 purpose granulated glass sphere surface by chemical plating with size plates the metallic zinc that a layer thickness is 30 μ m, impregnated in the polyamine fat resin 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 13:
The method that is 30-80 purpose granulated glass sphere surface by chemical plating with size plates the argent that a layer thickness is 10 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 50 ℃, solidify 10h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 14:
The method that is 20-30 purpose granulated glass sphere surface by chemical plating with size plates the argent that a layer thickness is 30 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 70 ℃, solidify 7h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 15:
The method that is 40-60 purpose granulated glass sphere surface by chemical plating with size plates the metallic aluminium that a layer thickness is 50 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 300-400 purpose glass microballon by volume for the mixed of 1:0.7, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 16:
The method that is 30-60 purpose granulated glass sphere surface by the vacuum hot dip with size plates the metallic aluminium that a layer thickness is 30 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.9, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 17:
The method that is 20-80 purpose granulated glass sphere surface by the vacuum hot dip with size plates the metallic zinc that a layer thickness is 30 μ m, impregnated in the polyamine fat resin 1 hour then, filters.With granulated glass sphere after the above-mentioned filtration and specific refractory power is 2.2, granularity be 100-400 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 100 ℃, solidify 2h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 18:
The method that is 30-80 purpose tetrafluoroethylene ball surface by chemical plating with size plates the chromium metal that a layer thickness is 20 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With baton round after the above-mentioned filtration and specific refractory power is 1.9, granularity be 100-400 purpose glass microballon by volume for the mixed of 1:0.5, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 19:
The method that is 20-30 purpose polytetrafluoroethylene granule surface by chemical plating with size plates the argent that a layer thickness is 30 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With baton round after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.3, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 20:
The method that is 40-60 purpose tetrafluoroethylene ball surface by chemical plating with size plates the metallic aluminium that a layer thickness is 50 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With baton round after the above-mentioned filtration and specific refractory power is 2.2, granularity be 100-300 purpose glass microballon by volume for the mixed of 1:0.4, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 21:
The method that is 30-60 purpose polyvinyl chloride ball surface by chemical plating with size plates the metallic copper that a layer thickness is 20 μ m, impregnated in the Resins, epoxy 1 hour then, filters.With baton round after the above-mentioned filtration and specific refractory power is 2.2, granularity be 200-300 purpose glass microballon by volume for the mixed of 1:0.6, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Embodiment 22:
The method that is 20-80 purpose polyvinyl chloride particles surface by chemical plating with size plates the metallic zinc that a layer thickness is 30 μ m, impregnated in the thermal-curable acrylic fat resin 1 hour then, filters.With baton round after the above-mentioned filtration and specific refractory power is 2.2, granularity be 100-400 purpose glass microballon by volume for the mixed of 1:1, stir then, be heated to 50 ℃, solidify 12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
Claims (7)
1, light reflecting material of a kind of nucleocapsid structure and preparation method thereof, it is characterized in that be a kind of be nuclear with stainless steel, glass, pottery or plastic grain, be the light reflecting material of shell structure with the high refractive index glass micro pearl.
2, light reflecting material of the described nucleocapsid structure of claim 1 and preparation method thereof is characterized in that step is carried out in the following order:
I. He the surface treatment first time.To directly polish as the particulate material outside surface of nuclear, or handle the metal plating that plates one deck 0-50 μ m at particulate material outside surface as nuclear by chemical plating or vacuum hot dip;
II. He the surface treatment second time.Will through above-mentioned surface-treated as the material soaking of nuclear in adhesives, filter then;
III. will mix by the volume ratio of 1:0～1:1 with the glass microballon of high refractive index as the particle of examining through the surface-treated second time, stir, and be heated to 50-120 ℃ and solidify 1-12h, sieve then, promptly obtain having the light reflecting material of nucleocapsid structure.
3, according to light reflecting material of claims 2 described nucleocapsid structures and preparation method thereof, the material that it is characterized in that being used as nuclear can be a kind of in stainless steel, glass, plastics or the ceramic particle, its particle size can be 20～80 orders, its shape can be that the ball-type of rule also can be non-rule particle, above-mentioned polishing is meant in 1000 purpose quartz sands carries out mechanical stirring, 80 rev/mins of stir speed (S.S.)s, churning time are 2h, to realize the particulate material outside surface polishing as nuclear.
4,, it is characterized in that above-mentioned plastics are meant a kind of in polyvinyl chloride or the tetrafluoroethylene according to light reflecting material of claims 2 described nucleocapsid structures and preparation method thereof
5,, it is characterized in that metal plating can be a kind of in zinc, silver, aluminium, chromium or the copper according to light reflecting material of claims 2 described nucleocapsid structures and preparation method thereof.
6,, it is characterized in that described adhesives can be a kind of in heat-curing type Resins, epoxy, polyamine fat resin or the acrylate resin according to light reflecting material of claims 2 described nucleocapsid structures and preparation method thereof.
7, according to light reflecting material of claims 2 described nucleocapsid structures and preparation method thereof, the specific refractory power of glass microballon that it is characterized in that being used as the high refractive index of shell material is 1.9～2.3, and it is of a size of 100～400 orders.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101852723A CN101434823A (en) | 2007-11-18 | 2007-11-18 | Core-shell structured reflecting material and preparation thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101852723A CN101434823A (en) | 2007-11-18 | 2007-11-18 | Core-shell structured reflecting material and preparation thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964676A (en) * | 2014-05-06 | 2014-08-06 | 湖州远光路标涂料有限公司 | All-weather high-refraction reflective micro-crystal ceramic bead |
| CN106565135A (en) * | 2016-10-19 | 2017-04-19 | 长安大学 | Preformed wear-resistant reflection sand and reflection material for all-weather roads |
| CN109401543A (en) * | 2018-10-26 | 2019-03-01 | 安徽拓力工程材料科技有限公司 | Liquid reflective coating and preparation method thereof and purposes |
| CN110283490A (en) * | 2018-10-26 | 2019-09-27 | 安徽拓力工程材料科技有限公司 | The three-dimensional reflecting unit body of liquid reflective coating |
| US10858496B2 (en) | 2015-09-11 | 2020-12-08 | 3M Innovative Properties Company | Durable retroreflective elements with a blend of beads |
| US11353640B2 (en) | 2015-09-11 | 2022-06-07 | 3M Innovative Properties Company | Durable retroreflective elements with an ionic copolymer core |
-
2007
- 2007-11-18 CN CNA2007101852723A patent/CN101434823A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964676A (en) * | 2014-05-06 | 2014-08-06 | 湖州远光路标涂料有限公司 | All-weather high-refraction reflective micro-crystal ceramic bead |
| US10858496B2 (en) | 2015-09-11 | 2020-12-08 | 3M Innovative Properties Company | Durable retroreflective elements with a blend of beads |
| US11286368B2 (en) | 2015-09-11 | 2022-03-29 | 3M Innovative Properties Company | Durable retroreflective elements with a blend of beads |
| US11353640B2 (en) | 2015-09-11 | 2022-06-07 | 3M Innovative Properties Company | Durable retroreflective elements with an ionic copolymer core |
| US12043723B2 (en) | 2015-09-11 | 2024-07-23 | 3M Innovative Properties Company | Durable retroreflective elements with a blend of beads |
| CN106565135A (en) * | 2016-10-19 | 2017-04-19 | 长安大学 | Preformed wear-resistant reflection sand and reflection material for all-weather roads |
| CN106565135B (en) * | 2016-10-19 | 2019-03-01 | 长安大学 | A kind of all-weather road preforming wear-resisting light reflecting sand and reflectorized material |
| CN109401543A (en) * | 2018-10-26 | 2019-03-01 | 安徽拓力工程材料科技有限公司 | Liquid reflective coating and preparation method thereof and purposes |
| CN110283490A (en) * | 2018-10-26 | 2019-09-27 | 安徽拓力工程材料科技有限公司 | The three-dimensional reflecting unit body of liquid reflective coating |
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Application publication date: 20090520 |