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A kind of highly flame-retardant light-diffusing PC material and preparation method thereof

A light-diffusing and high-flame-retardant technology, which is applied in the field of high-flame-retardant light-diffusing PC materials and their preparation, can solve the problem of not meeting the high flame-retardant requirements of thin optical products, affecting the light transmittance, haze, and haze of light-diffusing PC. and flame retardancy is difficult to guarantee and other problems, to achieve the effect of easy process operation, low production cost and easy industrial production

Active Publication Date: 2019-10-11
GUANGDONG JUSHI CHEM CO LTD
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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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  • A kind of highly flame-retardant light-diffusing PC material and preparation method thereof

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preparation example Construction

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

[0078] 1) Dry the PC pellets and PC powder separately at a drying temperature of 110-120°C;

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

[0080] 3) Fully mix PC pellets, light diffusing agent masterbatches, brominated flame retardants, silicone flame retardants, primary antioxidants, auxiliary antioxidants, ultraviolet absorbers and lubricants;

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

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

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

Embodiment 1

[0086] 1) Dry the PC pellet S-2001R and PC powder at 120°C for 4 hours, so that the moisture content of the PC resin is lower than 0.02%;

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

[0088] 3) Add 84.5 parts by mass of PC pellet S-2001R, light diffusing agent masterbatch in 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 of Add 1076 main antioxidant, 0.15 parts by mass of auxiliary antioxidant 168, 0.2 parts by mass of ultraviolet absorber UV-329 and 0.5 parts by mass of lubricant PETS into the high mixer, and mix for 1 to 2 minutes;

[0089] 4) Put the material in step 3) into a twin-screw extruder, extr...

Embodiment 2

[0091] 1) Dry the PC pellet S-2001R and PC powder at 120°C for 4 hours, so that the moisture content of the PC resin is lower 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 2 μm and GW-0801T with a particle size of 8 μm in a mass ratio of 7:3), and extrude to granulate , to obtain the light diffusing agent masterbatch that the mass percentage of light diffusing agent is 3%;

[0093] 3) Mix 76.8 parts by mass of PC pellet S-2001R, light diffusing agent masterbatch in 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 of Main antioxidant 1076, 0.1 mass parts of auxiliary antioxidant 168, 0.3 mass parts of ultraviolet absorber UV-329 and 0.7 mass parts of lubricant PETS are added to the high mixer, and mixed for 1 to 2 minutes;

[0094] 4) Add the raw materials in step 3) into the twin-screw extruder, extrud...

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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 highly flame-retardant light-diffusing PC material and a preparation method thereof, belonging 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 has also attracted more and more attention. Common lamp shade materials for lamp tubes include PC (polycarbonate), PMMA (acrylic) and so on. PC is a thermoplastic engineering plastic with superior comprehensive properties. It has excellent weather resistance, high impact resistance, excellent electrical insulation, high light transmittance, and less light energy loss. It is widely used in electrical lighting and other fields. Therefore, the lampshade material of LED lamps tends to use light-diffusing PC resin, which is the future development trend. [0003] LED lamps are required not to be dazzling, but also to main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L83/04C08L33/00
Inventor 杨海民姚杏梅
Owner GUANGDONG JUSHI CHEM CO LTD
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