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Polycarbonate composition and preparing method thereof

A polycarbonate and composition technology, which is applied in the field of engineering plastics, can solve problems such as affecting dimensional stability and processing fluidity, reducing material toughness, and failing to achieve a balance between rigidity and toughness. amount of effect

Active Publication Date: 2015-12-09
KINGFA SCI & TECH CO LTD +1
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Problems solved by technology

However, in conventional glass fiber-reinforced PC materials, glass fiber can endow the material with strong rigidity, but the toughness of the material is greatly damaged.
[0004] At present, fibrous fillers are mainly used for reinforcement in the system. The addition of fibrous fillers will greatly reduce the toughness of the material, and the balance of rigidity and toughness cannot be achieved. The conventional method is to increase the toughening agent, but it is well known that increasing the toughening agent will affect the size. Stability and Processing Fluidity
[0005] So far, there has been no report about the effect of using two different lengths of glass fibers on the toughness of the polycarbonate composition

Method used

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  • Polycarbonate composition and preparing method thereof

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Effect test

Embodiment 1-9 and comparative example 1-6

[0068] Embodiment 1-9 and comparative example 1-6: the preparation of polycarbonate composition

[0069] 1) Weigh each component according to the formula content, and dry the polycarbonate, fibrous filler, flame retardant, and other additives that need to be pre-dried at 120°C-130°C, and the drying time is set at 4h-6h, to obtain polycarbonate, fibrous filler, flame retardant, and other additives that have been dried;

[0070] 2) Mix the pre-dried polycarbonate, fibrous filler, flame retardant, and other additives through a high-speed mixer, the mixing temperature is 30°C-50°C, and the mixing time is set at 5min-15min to obtain Uniformly mixed polycarbonate, fibrous filler, flame retardant, and other additives;

[0071] 3) Pass the homogeneously mixed polycarbonate, flame retardant, and other additives through such as figure 1 Feed port 1 shown, fibrous filler passes through as figure 1 The feed port 1, 2 or 3 shown is fed into the twin-screw extruder. The temperature con...

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Abstract

The invention discloses a polycarbonate composition. The polycarbonate composition is prepared from, by weight, 50-90 parts of polycarbonate, 5-50 parts of fibrous filler, 0.01-30 parts of flame retardant and 0-10 parts of other adjuvants, wherein the sum of the weight parts of the four components is 100 parts. The fibrous filler comprises fibrous filler bodies with the length larger than or equal to 400 micrometers and accounts for 0.01-30 wt% of the fibrous filler. According to selection, the length and content distribution of the fibrous filler are adjusted in the formula of the polycarbonate composition, the fibrous filler can be distributed in the polycarbonate composition in a unimodal mode, while rigidity of the polycarbonate composition is enhanced, the polycarbonate composition has excellent toughness, rigidity and toughness can be balanced, modulus can be increased remarkably, and applicability and practicality of the composition are improved.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate PC is one of the five major engineering plastics. It has high impact resistance and heat resistance, and is widely used in all aspects of people's production and life. However, due to some defects of polycarbonate, such as poor processing performance, easy stress cracking, sensitive notch resistance, and poor wear resistance, it cannot meet the needs of actual use in some occasions, so people began to use glass fiber for polycarbonate. Esters are enhanced. [0003] Glass-reinforced PC materials are widely used in the fields of automobiles, electronic appliances, and home appliance materials due to their good strength, toughness, and thermal properties. However, in conventional glass fiber-reinforced PC materials, glass fiber can impart strong rigidity to the ma...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L25/06C08K13/06C08K9/04C08K7/14C08K5/523C08K5/12C08K5/098B29C47/92B29C48/92
Inventor 李明昆刘贤文岑茵佟伟董相茂郭唐华
Owner KINGFA SCI & TECH CO LTD
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