Photodiffusion PC material with high flame-retardant performance and preparation method thereof

A light diffusion and high flame retardant technology, applied in the field of high flame retardant light diffusion PC material and its preparation, can solve the problem of not meeting the high flame retardant requirements of thin optical products, affecting light diffusion PC light transmittance and haze, haze and flame retardancy are difficult to guarantee, so as to achieve the effect of easy process operation, low production cost and easy industrial production

Active Publication Date: 2017-10-20
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polycarbonate resin has some flame retardancy, it is only UL94 V 2 Grade, ordinary light-diffusing PC, cannot meet the high flame-retardant requirements of thin optical products, so it is necessary to further improve its flame-retardant performance
At present, most of the research is to add flame retardants to the light-diffusing PC to improve the flame-retardant level, but most types of flame retardants will affect the light transmittance and haze of the light-diffusing PC
At the same time, in order to improve the utilization rate of light, the material of LED lighting lampshade is getting thinner and thinner. The design thickness in the industry is basically 1.0mm, even as low as 0.8mm. However, due to the thinner wall thickness, the haze and flame retardancy become difficult. ensure
[0004] The Chinese patent with the application number 2013107528199 discloses a low-temperature resistant flame-retardant light-diffusing polycarbonate composite material and its preparation method. However, the highest light transmittance of the sample is only 80.8%. Although the flame retardancy is good, the patent does not include Mention the thickness of the samples prepared for the test, no comparison is possible
The Chinese patent application number 2014101185594 discloses an anti-aging light-diffusing PC-based resin and its preparation method. The light transmittance and haze of the 2.0mm thick sample can reach 83% and 98% respectively, but it does not improve the material Flame retardant performance, so that the application is subject to certain restrictions

Method used

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  • Photodiffusion PC material with high flame-retardant performance and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0077] The preparation method of the above-mentioned high flame-retardant light-diffusing PC material includes the following steps:

[0078] 1) Dry the PC pellets and PC powder separately, the drying temperature is 110~120℃;

[0079] 2) Mix the PC powder and the light diffusing agent uniformly, extrude and granulate to obtain the light diffusing agent masterbatch;

[0080] 3) Fully mix PC pellets, light diffusion agent masterbatch, brominated flame retardant, silicone flame retardant, main antioxidant, auxiliary antioxidant, ultraviolet absorber and lubricant;

[0081] 4) Add the materials of step 3) into a twin-screw extruder, extrude and pelletize, to obtain a high flame-retardant light-diffusing PC material.

[0082] Preferably, in step 2), the mass percentage of the light diffusing agent in the light diffusing agent masterbatch is 3% to 7%.

[0083] Preferably, in step 3), the processing temperature in each zone of the twin-screw extruder is 250-260° C., and the screw speed is 250-30...

Embodiment 1

[0086] 1) Dry PC pellets S-2001R and PC powder at 120°C for 4 hours to make the moisture content of PC resin less than 0.02%;

[0087] 2) Mix 5.7 parts by mass of PC powder and 0.3 parts by mass of light diffusing agent (composed of KMP-590 with a particle size of 2μm and GW-0801T with a particle size of 8μm in a mass ratio of 4:1), and extrude and granulate , To obtain a light diffusing agent masterbatch with a mass percentage of 5% of the light diffusing agent;

[0088] 3) 84.5 parts by mass of PC pellets S-2001R, light diffusion agent masterbatch of step 2), 8 parts by mass of flame retardant BC-58, 0.5 parts by mass of silicone flame retardant FCA117, 0.15 parts by mass Add the main antioxidant 1076, 0.15 parts by mass of the auxiliary antioxidant 168, 0.2 parts by mass of the ultraviolet absorber UV-329 and 0.5 parts by mass of the lubricant PETS to the high mixer, and mix for 1 to 2 minutes;

[0089] 4) Add the materials of step 3) into a twin-screw extruder, extrude and pelle...

Embodiment 2

[0091] 1) Dry PC pellets S-2001R and PC powder at 120°C for 4 hours to make the moisture content of PC resin less than 0.02%;

[0092] 2) Mix 9.7 parts by mass of PC powder and 0.3 parts by mass of light diffusing agent (composed of 30-424 with a particle size of 2μm and GW-0801T with a particle size of 8μm in a mass ratio of 7:3), and extrude and granulate. , To obtain a light diffusing agent masterbatch with a mass percentage of 3% of the light diffusing agent;

[0093] 3) Combine 76.8 parts by mass of PC pellets S-2001R, light diffusing agent masterbatch of step 2), 10 parts by mass of flame retardant BC-58, 2 parts by mass of silicone flame retardant FCA117, 0.1 parts by mass Add the main antioxidant 1076, 0.1 parts by mass of the auxiliary antioxidant 168, 0.3 parts by mass of the ultraviolet absorber UV-329 and 0.7 parts by mass of the lubricant PETS into the high-mixer and mix for 1 to 2 minutes;

[0094] 4) Add the raw materials of step 3) into a twin-screw extruder, extrude...

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Abstract

The invention discloses a photodiffusion PC material with high flame-retardant performance and a preparation method thereof. The PC material is prepared from PC granules, PC powder, a photodiffusion agent, a brominated flame retardant, an organic-silicon flame retardant, a main antioxidant, an auxiliary antioxidant, an ultraviolet light absorber and a lubricant. The preparation method comprises the steps as follows: 1) drying the PC granules and the PC powder; 2) preparing photodiffusion agent master batch; 3) fully and uniformly mixing the PC granules, the photodiffusion agent master batch, the brominated flame retardant, the organic-silicon flame retardant, the main antioxidant, the auxiliary antioxidant, the ultraviolet light absorber and the lubricant; 4) adding the material in step 3) to a twin-screw extruder for extrusion granulation to obtain the photodiffusion PC material with high flame-retardant performance. The photodiffusion PC material with high flame-retardant performance has the advantages of high light transparency, high haze, high flame-retardant performance and the like, has excellent comprehensive performance and can be widely applied to electrical lighting and other fields. The preparation method is simple, the process operation is easy to realize, the production cost is low, and industrial production is facilitated.

Description

Technical field [0001] The invention relates to a high flame-retardant light diffusion PC material and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] At present, energy-saving and environmentally-friendly lamps are becoming more and more popular, and the development of LED lamp shade materials is also attracting more and more attention. Common materials for lamp shade materials include PC (polycarbonate), PMMA (acrylic), etc. PC is a kind of thermoplastic engineering plastic with superior comprehensive performance. It has excellent weather resistance, high impact resistance, excellent electrical insulation, high light transmittance, and low light energy loss. It is widely used in electrical lighting and other fields. Therefore, LED lampshade materials tend to choose light-diffusing PC resin, which is the future development trend. [0003] LED lamps are required not to be dazzling, but to maintain the transmittan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L83/04C08L33/00
CPCC08L69/00C08L2201/02C08L2201/08C08L2203/20C08L2205/025C08L2205/035C08L83/04C08L33/00
Inventor 杨海民姚杏梅
Owner GUANGDONG JUSHI CHEM CO LTD
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