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A high-strength, high-heat-resistant, flame-retardant transparent polycarbonate resin and its preparation method

A resin and flame retardant technology, applied in the field of polymer materials, can solve the problems of high price, poor heat resistance of phosphorus-based flame retardants, affecting PC light transmittance and impact strength, etc., and achieve the effect of improving flame retardant performance.

Active Publication Date: 2022-05-13
锦西化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halogen flame retardants will seriously affect the light transmittance and impact strength of PC. Sulfonate flame retardants have good flame retardancy and have little effect on the light transmittance of polycarbonate. However, sulfonate contains sulfur, Harmful to the environment and human body
Phosphorus-based flame retardants are cheap, good flame-retardant effect and halogen-free and environmentally friendly, but phosphorus-based flame retardants have poor heat resistance and excessive addition will directly affect the light transmittance of polycarbonate
Silicone-based flame retardants have the characteristics of high efficiency, non-toxicity, low smoke, anti-dripping, and little impact on light transmission, processing performance, and mechanical properties, but their high price limits their industrial use.
Therefore, according to the current research status, a single flame retardant cannot meet the performance requirements of polycarbonate at the same time

Method used

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  • A high-strength, high-heat-resistant, flame-retardant transparent polycarbonate resin and its preparation method
  • A high-strength, high-heat-resistant, flame-retardant transparent polycarbonate resin and its preparation method
  • A high-strength, high-heat-resistant, flame-retardant transparent polycarbonate resin and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0029] The synthesis of embodiment 1 phosphorus silicon flame retardant

[0030] (1) Take 4.32g DOPO and add 20ml of dichloromethane into a three-necked flask equipped with a condensing reflux device, and slowly add 4ml of CCl dropwise under ice bath conditions 4 .After the dropwise addition, continue to add 1.2g propenyl alcohol and 4ml triethylamine to the system. After a period of reaction, raise the temperature of the system, keep it warm for a period of time, and then lower it to room temperature. Filter the crude product, wash it, and dry it to obtain propylene Alcohol-modified DOPO.

[0031] (2) Dissolve 11.5 g of the product in step (1) in cyclohexane, add 7.52 g (0.01 mol) of phenyl hydrogen-containing silicone resin to it, stir evenly, add Karstedt catalyst after removing the solvent under reduced pressure, and finally react to obtain target product.

Embodiment 2-6

[0032] Embodiment 2-6 high strength, the preparation of high heat-resistant flame-retardant transparent polycarbonate resin

[0033] Embodiment 2-6, the weight percent of each component in each embodiment is as shown in table 1.

[0034] The specific steps are as follows. Dry the PC resin at a temperature of 120°C for 4 hours, and mix the PC resin and the flame retardant according to the proportion. It is added to a twin-screw extruder for melt blending and extrusion; wherein the temperature of each zone of the twin-screw extruder is 260°C, 265°C, 270°C, 270°C, 265°C, and the head temperature is 270°C, The extruded raw materials are drawn, granulated, and dried to obtain a transparent flame-retardant PC material. The obtained transparent PC material is injected into a sample strip with a thickness of 3.0mm under the injection molding machine, and the performance test is performed according to the corresponding standard test (see Table 2).

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Abstract

The invention provides a high-strength, high-heat-resistant and flame-retardant transparent polycarbonate and a preparation method thereof. The polycarbonate resin and a phosphorus-silicon flame retardant are uniformly mixed and prepared through a process of melt extrusion. The phosphorus-silicon flame retardant adopted in the present invention is to modify DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) by propylene alcohol, and the modified structure is similar to that of benzene Prepared by reacting hydrogen-containing silicone resin. Phosphorus and silicon elements are simultaneously introduced into the structure of the flame retardant and added to the polycarbonate resin to improve the thermal stability and mechanical strength of the polycarbonate material without affecting the transmittance. The preparation process of the present invention is simple, halogen-free and environment-friendly, and has great market promotion value.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-strength, high-heat-resistant and flame-retardant transparent polycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a thermoplastic engineering plastic with good comprehensive properties. Due to its special structure, polycarbonate has excellent light transmission, impact toughness, electrical insulation, and weather resistance. Widely used in electronics, electrical appliances, aerospace, automotive and other industries. [0003] With the increasing development of industries such as electronic appliances, aerospace, and automotive components, the requirements for polycarbonate flame retardancy are becoming more and more stringent. Polycarbonate itself has certain flame retardancy, and its oxygen index can reach about 25, which can be passed UL94 V-2 test, but to meet the requirements of high flame retardant performance, it ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/395C08L69/00C08L83/08
CPCC08G77/395C08L69/00C08L2201/02C08L2201/08C08L2201/10C08L83/08
Inventor 张瑾朱佳虹李锦平李淑杰谷松
Owner 锦西化工研究院有限公司
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