Weather-resistant and flame-resistant light-diffusion PC applicable to outdoor lampshades and preparation method of weather-resistant and flame-resistant light-diffusion PC
An outer lampshade and light diffusing technology, applied in the field of light diffusing PC materials and the preparation of light diffusing PC materials, can solve the problems of poor weather resistance, insufficient flame retardancy, easy aging of light diffusing PC, etc., so as to improve the flame retardant efficiency. , Improve weather resistance and flame retardant performance, improve the effect of flame retardant effect
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Embodiment 1
[0074] Example 1: Preparation of a weather-resistant and flame-retardant light-diffusing PC that can be used for outdoor lampshades
[0075] Table 1 Example 1-5 A kind of weather-resistant and flame-retardant PC formula table (w / w%) that can be used for light diffusion of outdoor lampshades
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[0077]
[0078] refer to figure 1 , synthetic fluorocarbonate polyurethane elastomer:
[0079] Preparation of Compound 1:
[0080] 1) Weigh 2g of bisphenol A in 40mL of dichloromethane, and then add 0.016g of transesterification catalyst NaOH;
[0081] 2) Weigh 1.87g of diphenyl carbonate in 20mL of dichloromethane and slowly add it to 1) under the condition of stirring at room temperature, and react at 40°C for 72 hours; after the reaction is completed, filter it, and use an appropriate amount of Diethyl ether was washed, and the obtained filtrate was distilled under reduced pressure with a rotary evaporator to obtain a solid, and the resulting solid was extracted 3 tim...
Embodiment 2
[0094] Example 2: Preparation of a weather-resistant and flame-retardant light-diffusing PC that can be used for outdoor lampshades
[0095] The synthesis process of the fluorine-containing carbonate polyurethane elastomer is the same as in Example 1.
[0096] Raw material formula: see Table 1. The preparation method of Example 2 is the same as that of Example 1, except that when the above-mentioned mixed slurry is poured into the twin-screw extruder, the temperature is set at 280°C.
Embodiment 3
[0097] Example 3: Preparation of a weather-resistant and flame-retardant light-diffusing PC that can be used for outdoor lampshades
[0098] The synthesis process of the fluorine-containing carbonate polyurethane elastomer is the same as in Example 1.
[0099] Raw material formula: see Table 1. The preparation method of Example 3 is the same as that of Example 1, except that when the above-mentioned mixed slurry is poured into the twin-screw extruder, the temperature is set at 270°C.
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