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Polycarbonate composition and preparation method thereof

A technology of polycarbonate and composition, which is applied in the field of polycarbonate composition and its preparation, can solve the problems of high price and decreased mechanical properties of materials, and achieve the effects of total cost reduction, mechanical performance improvement, and simple and reliable process

Inactive Publication Date: 2009-09-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of the invention can be used for high-contrast laser marking, and has very good flame retardancy; the invention prevents the light transmittance of the material itself from decreasing after adding the laser auxiliary agent, and at the same time, the invention also overcomes the current laser auxiliary agent addition amount Too much will cause the degradation of the mechanical properties of the material and the problem of high prices

Method used

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  • Polycarbonate composition and preparation method thereof
  • Polycarbonate composition and preparation method thereof
  • Polycarbonate composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 100 parts by weight of polycarbonate (PC, brand PC201-15, product of LG DOW Polycarbonate Co., Ltd., South Korea) was dried at 120°C for 4 hours, and then mixed with 1 part by weight of polyhedral oligomeric organosilsesquioxane (benzene Base-POSS, C 27 H 68 O 12 Si 8, Average molecular weight 809.51g / mol, brand MS0813, American Hybrid Plastics Company product) After mixing uniformly, add the mixture into a twin-screw extruder (brand ZE25, German Berstorff company) for melt blending and extrusion. For pellets, the temperature of each section of the extruder is set to 30 / 220 / 230 / 235 / 240 / 245 / 250 / 250 / 250°C (from the hopper to the die), and the screw speed is 150r / min. The modified PC after twin-screw extruding and pelletizing was dried at 120°C for 4 hours, and injection molding machine (brand HTB110X / 1, Ningbo Haitian Machinery Co., Ltd.) was used to inject the specimens required for the experiment. The injection temperature was 270°C. The injection mold The temperature is 70...

Embodiment 2

[0034] In this implementation, 100 parts by weight of polycarbonate (PC, brand PC201-15, product of LG DOW Polycarbonate Co., Ltd., South Korea) is dried at 120°C for 4 hours, and then 3 parts by weight of polyhedral oligomeric organosilsesquioxane are added. Alkyl (Phenyl-POSS, C 27 H 68 O 12 Si 8 , Average molecular weight 809.51g / mol, brand MS0813, American Hybrid Plastics Company product) After mixing uniformly, the mixture was prepared according to the same processing and molding conditions as in Example 1, and then the same performance test was performed. The performance results of this embodiment are shown in Table 1.

Embodiment 3

[0036] In this implementation, 100 parts by weight of polycarbonate (PC, brand PC201-15, product of LG DOW Polycarbonate Co., Ltd. of South Korea) is dried at 120°C for 4 hours, and then 10 parts by weight of polyhedral oligomeric organosilsesquioxane are added. Alkyl (Phenyl-POSS, C 27 H 68 O 12 Si 8 , Average molecular weight 809.51g / mol, brand MS0813, American Hybrid Plastics Company product) After mixing uniformly, the mixture was prepared according to the same processing and molding conditions as in Example 1, and then the same performance test was performed. The performance results of this embodiment are shown in Table 1.

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Abstract

The invention relates to a polycarbonate composition and a preparation method thereof. The composition comprises the following components in portion by weight: 100 portions of polycarbonate, 0.1 to 10 portions of polyhedral oligomeric silsesquioxane, and 0 to 0.1 portion of sulphonate flame retardant. The preparation method comprises the following steps: placing the polycarbonate, the polyhedral oligomeric silsesquioxane and the sulphonate flame retardant into a blending device, and mixing the components; melting and mixing the mixture into a melt blending device, and cooling the mixture to form a modified polycarbonate blank; and drying the modified polycarbonate blank, processing the blank by adopting a plastic molding process, and cooling and molding the processed blank to obtain the polycarbonate composition. The composition can carry out laser marking with high contrast, and has good flame retardant property; the light transmittance of the material is not reduced; and simultaneously, the problems of mechanical property reduction and high price of the material due to excessive added laser assistants are solved.

Description

Technical field [0001] The invention relates to a composition in the field of polymer materials and a preparation method thereof, in particular to a polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a general term for polyesters corresponding to carbonic acid. It refers to a type of polymer containing (ORO-CO) links in the main chain. With the difference of the alkyl group R in the formula, polycarbonate can be divided into Aliphatic, fatty-aromatic and aromatic polycarbonate. Among them, the mechanical properties of aliphatic and aliphatic-aromatic polycarbonate are relatively low, which limits its application in engineering plastics. Therefore, as one of the five major engineering plastics, polycarbonate only refers to aromatic polycarbonate, and the most widely used commercially is bisphenol A polycarbonate (BPA-PC). The structural formula of this polycarbonate is: [0003] [0004] The scientific name 2,2-bis(4'-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L83/04C08L83/05C08K5/42
Inventor 李思源党晓容张勇
Owner SHANGHAI JIAO TONG UNIV
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