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Shading PC material and preparation method thereof

A raw material and acid etching technology, which is applied in the field of light-shielding PC materials and its preparation, can solve problems such as difficult to ensure the mechanical strength of modified materials, and achieve good light-shielding performance and mechanical strength.

Pending Publication Date: 2021-03-16
BULL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the related technology modifies polycarbonate to improve its light-shielding properties, it is difficult to ensure that the modified material maintains good mechanical strength

Method used

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  • Shading PC material and preparation method thereof
  • Shading PC material and preparation method thereof

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preparation example Construction

[0033] The preparation method of the acid-etched glass microspheres comprises: acid-etching the hollow glass microspheres with sulfuric acid and phosphate buffer solution.

[0034] The hollow glass microspheres are acid-etched with a mixed solution of sulfuric acid and phosphoric acid buffer solution, wherein the phosphoric acid buffer solution can be NaH with a pH range of 1-5 2 PO 4 or KH 2 PO 4 solution, the sulfuric acid solution can be sulfuric acid with a mass fraction of 95% to 98%, the acid etching time can be 20 to 30s, and the mixed solution of sulfuric acid and phosphoric acid buffer solution is 20-20 to the hollow glass microsphere acid etching temperature. 30°C. Further, the volume ratio of sulfuric acid and phosphate buffer solution may be 10:1-3.

[0035] The particle diameter of the hollow glass microsphere of the present application is 50-100 μm, the wall thickness is 1-4 μm, and the refractive index is 1.9-2.2. It should be noted that after the acid etch...

Embodiment 1

[0058] The hollow glass microspheres were etched in a mixed solution of sulfuric acid and phosphate buffer solution at a temperature of 20°C for 30 seconds, the mass fraction of sulfuric acid was 98%, KH 2 PO 4 The pH of the phosphate buffer solution is 1; after acid etching, the porosity of the surface of the glass microsphere is approximately 15%, and depressions or micropores with a diameter of 3-5 μm are formed. Then filter with a microporous membrane with an average pore size of about 10 μm, and wash with deionized water several times until the pH value of the filtrate is 7 when detected with pH test paper. Dry the cleaned glass microspheres in an oven at approximately 100°C for 2 hours. The volume ratio of sulfuric acid and phosphate buffer solution can be 10:1.

[0059] Make a solution of silane coupling agent A-1100 and stir it evenly. Drop the solution into the aforementioned dried hollow glass microspheres and stir for about 40 minutes to make the coupling agent f...

Embodiment 2

[0065] The hollow glass microspheres were acid-etched in a mixed solution of sulfuric acid and phosphate buffer solution at a temperature of 30°C for 20 seconds, the mass fraction of sulfuric acid was 95%, NaH 2 PO 4 The pH of the phosphate buffer solution is 5; after acid etching, the porosity of the surface of the glass beads is approximately 30%, and a depression or micropore with a diameter of 3-5 μm is formed, and then the microporous membrane with an average pore diameter of approximately 20 μm is used for Filter and wash with deionized water several times until the pH of the filtrate is 7 when detected with pH test paper. Dry the cleaned glass microspheres in an oven at approximately 120°C for 3 hours. The volume ratio of sulfuric acid and phosphate buffer solution can be 10:3.

[0066] Make a solution of silane coupling agent A-1100 and stir it evenly. Drop the solution into the aforementioned dried hollow glass microspheres, and stir for about 60 minutes to make th...

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Abstract

The invention relates to the technical field of polymer material modification, in particular to a shading PC material and a preparation method thereof. The shading PC material is prepared from the following raw materials: polycarbonate, acid-etched glass beads and talcum powder treated by a coupling agent, and the talcum powder treated by the coupling agent is carried on the acid-etched glass beads. According to the shading PC material disclosed by the invention, the talcum powder treated by the coupling agent is carried in micropores or recesses of the glass beads subjected to acid etching, so that the problem of agglomeration of the talcum powder in polycarbonate can be improved, the mixture can be uniformly dispersed, and the polycarbonate can be modified by utilizing the talcum powderand the glass beads; the prepared shading PC material has shading property, stress concentration of the shading PC material due to non-uniform dispersion of mixed materials is avoided, the mechanicalstrength of the shading PC material is not greatly reduced, and the modified shading PC material is ensured to keep good mechanical strength.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a light-shielding PC material and a preparation method thereof. Background technique [0002] Polycarbonate (Polycarbonate, abbreviated as PC) is a general term for polymer compounds containing carbonate in the main molecular chain. Polycarbonate has outstanding impact toughness and dimensional stability, excellent mechanical properties, electrical insulation properties, wide temperature range, good creep resistance, weather resistance, low water absorption, non-toxic, self-extinguishing, is a An engineering plastic with excellent comprehensive properties. [0003] Modification of polycarbonate to improve its light-shielding property can further expand its application. However, in the related art, when modifying polycarbonate to improve its light-shielding properties, it is difficult to ensure that the modified material maintains good mechanical strength. ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L51/08C08L27/18C08L51/04C08K13/06C08K9/12C08K7/28C08K3/34C08K9/02C08K9/06C08K9/10C08K5/523
CPCC08L69/00C08L2205/035C08L51/08C08L27/18C08L51/04C08K13/06C08K9/12C08K7/28C08K3/34C08K9/02C08K9/06C08K9/10C08K5/523Y02A40/25
Inventor 樊绍彦申会员何洋秦强强陈泉孔德玉丁晓龙
Owner BULL GRP CO LTD
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