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Surface treatment method for powder composition of optical diffusion plastic

A composition, light diffusion technology, applied in the direction of dyeing organosilicon compound treatment, dyeing polymer organic compound treatment, inorganic pigment treatment, etc.

Inactive Publication Date: 2010-09-08
GUANGZHOU DAYIN CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of in-situ polymerization to coat inorganic light-diffusing particles with poly(meth)acrylic acid and its esters in the field of light-diffusing plastics has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A certain quality of calcium carbonate powder is modified by adding YDH-151 silane coupling agent with 1.5% of the powder mass in a high-speed stirrer at 100°C, and the modified powder is added into a three-necked flask filled with methyl ethyl ketone solvent, and ultrasonically After dispersing for 30 minutes, slowly add the pre-prepared mixed solution of methyl methacrylate and azobisisobutyronitrile dropwise. Control the temperature at about 80°C, react for 3 hours, then raise the temperature to 90°C, and discharge after 30 minutes to obtain a core-shell particle structure with calcium carbonate particles as the core and polymethyl methacrylate as the shell.

[0015] With 4% by weight of calcium carbonate as the core, polymethyl methacrylate as the light diffusing agent (particle size is 10 μm, polymethyl methacrylate shell thickness 0.7 μm), 96% by weight of polycarbonate Esters Extrude the composition through a twin-screw extruder. After measurement, the light tra...

Embodiment 2

[0017] Using KH-550 silane coupling agent for nano-SiO 2 surface modification, with a stirrer, N 2 Into the four-necked flask of the gas introduction tube, condenser tube and thermometer, feed N 2 Gas, add toluene 100mL, heat up to boiling, add 2g SiO 2 (Treat at 100°C for 12 hours before use), add 5 mL of hydrolyzed silane coupling agent, stir, reflux, and react for 4 hours to obtain a reaction product. Take the modified SiO 2 Disperse in 100mL of toluene solution, pass through N 2 Gas, stirring, gradually warming up to 80°C, adding the initiator benzoyl peroxide, adding methacrylic acid drop by drop, 0.5mL / min, reacting for 3h, to obtain the product.

[0018] Use 2% by weight of silicon dioxide as the core, polymethacrylic acid as the shell light scattering agent (particle size is 12 μm, polymethylmethacrylate shell thickness 0.8 μm), 98% by weight of polymethylmethacrylate Methyl acrylate was used to extrude the composition through a twin-screw extruder. After measure...

Embodiment 3

[0020] A certain quality of barium sulfate powder is modified by adding YDH-151 silane coupling agent with 1.5% of the powder mass in a high-speed stirrer at 100°C, and the modified powder is added to a three-necked flask filled with methyl ethyl ketone solvent, and ultrasonically After dispersing for 30 minutes, slowly add the pre-prepared mixed solution of glycidyl methacrylate and azobisisobutyronitrile dropwise. Control the temperature at about 80°C, react for 3 hours, then raise the temperature to 90°C, and discharge after 30 minutes to obtain a core-shell particle structure with barium sulfate particles as the core and polyglycidyl methacrylate as the shell.

[0021] Use 3% by weight of barium sulfate as the core and polyglycidyl methacrylate as the light diffusing agent (particle size is 10 μm, polyglycidyl methacrylate shell thickness 0.7 μm), 97% by weight of Polycarbonate The composition was extruded through a twin-screw extruder. After measurement, the light transm...

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PUM

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Abstract

The invention relates to a surface treatment method for a powder composition of optical diffusion plastic, which is characterized by comprising the following steps: modifying the surfaces of inorganic optical diffusion particles with a silane coupling agent in an in-situ polymerization method, ultrasonically dispersing the inorganic optical diffusion particles into an organic solvent, and slowly dripping mixed solution of an initiator and (methyl) acrylic acid and ester monomers thereof at a certain temperature for polymerization, thereby obtaining the product. Since the compound with the core-shell structure is prepared through in-situ realization and combination of the inorganic particles, the invention not only improves the compatibility of the powder composition and the transparent plastic substrate, but also has no large changes in optical properties. Moreover, the refractive index matching degree of the powder composition and the transparent plastic substrate can be effectively adjusted through changing the thickness of the shell layer and the core layer of the powder composition, thereby realizing high transparency and optical diffusibility.

Description

technical field [0001] The invention relates to a method for surface treatment of a powder composition used in light-diffusing plastics. Background technique [0002] With the rapid development of the communication and home appliance industries, liquid crystal displays have attracted increasing attention, and domestic manufacturers have invested in the research and development of liquid crystal display related industries one after another. Compared with other display systems, liquid crystal displays not only have the advantages of small size and light weight, but also have the characteristics of low power consumption and low operating voltage, and have the possibility of displaying various colors. A backlight module in a liquid crystal display generally includes a light source, a reflector, a light guide plate, a diffuser plate, and a light collector. The function of the diffuser plate is to provide a uniform surface light source for the liquid crystal display. At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/00C09C3/12C09C3/10C09C1/02C09C1/28C09C1/40C08K9/10C08K9/06C08K3/26C08K3/36C08K3/30C08K7/20C08K3/22C08F120/14C08F120/06C08F120/32C08F120/18C08F120/28C08L69/00C08L33/12C08L33/02C08L33/14C08L25/06C08L33/10C08L23/12C08L25/14C08L35/06
Inventor 邓招明
Owner GUANGZHOU DAYIN CHEM TECH CO LTD
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