Low-precipitation flame-retardant light diffusion polycarbonate resin and preparation method thereof
A technology of polycarbonate resin and light diffusion, applied in the field of materials, can solve problems such as difficult control of lampshade thickness uniformity, difficulty in product molding, and influence on product appearance, so as to achieve excellent appearance, reduce internal stress generation, and increase processing smoothness Effect
Active Publication Date: 2019-04-19
JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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Problems solved by technology
[0004] At present, the flame-retardant light-diffusing polycarbonate resin specially used to extrude the LED lampshade lamp tube on the market, because the polycarbonate resin itself has a high viscosity, it requires a large extrusion pressure, and there is a large internal stress, and the thickness of the lampshade is uniform. The degree is also difficult to control, resulting in difficult product molding, the surface is difficult to be smooth, and there are depressions; and a large amount of flame retardant is added, and the die is prone to produce small molecule precipitates during continuous extrusion, which affects the appearance of the product
Method used
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Embodiment 1
[0034] Taking Example 1 as an example, its preparation method comprises:
[0035] S1: Weigh polycarbonate resin with a weight ratio of 97.29%;
[0036] S2: Weigh 0.8% of light diffusing agent, 0.4% of dispersant, 0.3% of processing protection agent, 0.2% of lubricant and 1.0% of flame retardant, and mix uniformly;
[0037] S3: Weigh the weight ratio and weigh 0.01% of other additives, put them into the mixer together with the engineering plastics in S1 and the light diffusing agent and processing protection agent mixed in S2 and continue mixing until uniform;
[0038] S4: Put the mixed raw materials in S3 into the hopper of the twin-screw extruder, wait for melt extrusion, and granulate.
[0039] Among them, the temperature in the first zone of the twin-screw extruder in S4 is 170-190°C, the temperature in the second zone is 240-255°C, the temperature in the third zone is 245-260°C, the temperature in the fourth zone is 250-260°C, the temperature in the fifth zone is 250-260°...
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Abstract
The invention provides a low-precipitation flame-retardant light diffusion polycarbonate resin and a preparation method thereof. The low-precipitation flame-retardant light diffusion polycarbonate resin comprises, by weight, 94.78-98.69 parts of polycarbonate resin, 0-1 part of a light diffusing agent, 0.3-0.6 part of a dispersant, 0.3-0.6 part of a processing protective agent, 0.2-1 part of a lubricant, 0.5-2 parts of a flame retardant and 0.01-0.02 part of other additives. The low-precipitation flame-retardant light diffusion polycarbonate resin has the advantages of improvement of the yieldduring polycarbonate resin extrusion, minimization of the internal stress generated during extrusion molding, easiness in molding, and uniform thickness of the finished product; the luminous flux transmittance of the low-precipitation flame-retardant light diffusion polycarbonate resin reaches 85% or above, and the flame retardant grade is stable at UL94 1.0mm V0; and the precipitation of the above special material for extrusion is extremely low in the continuous extrusion process, and the preparation method can achieve the purposes of simple process, convenient operation and low cost on thebasis of ensuring other physical properties.
Description
technical field [0001] The invention relates to the technical field of materials, in particular to a flame-retardant light-diffusing polycarbonate resin with low precipitation and a preparation method thereof. Background technique [0002] Polycarbonate resin (PC) is a kind of amorphous engineering plastics with excellent comprehensive properties. It not only has high electrical insulation and flame retardancy, but also has high transparency, excellent mechanical properties, and high thermal conductivity. Deformation temperature, anti-ultraviolet, anti-aging. [0003] Among the currently used engineering plastics, polycarbonate resin has the best transparency, with a visible light transmittance of over 90%, and is often used as a matrix material for light-scattering materials. The surface of the formed polycarbonate resin lamp product is high gloss, high brightness, light weight, and outstanding appearance quality. It is the most ideal appearance material in the field of LE...
Claims
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IPC IPC(8): C08L69/00C08L83/04C08L33/04C08K5/42B29C48/92
CPCC08L69/00C08L2201/02C08L2205/025C08L2205/035C08L2207/53C08L83/04C08L33/04C08K5/42
Inventor 王晓明薛成亮申应军
Owner JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD