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Polycarbonate composition and preparing method thereof

A polycarbonate and composite technology, applied in the field of engineering plastics, can solve the problems of large damage to material toughness, failure to achieve rigid-tough balance, and reduced material toughness, etc.

Active Publication Date: 2015-12-09
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 1-7

[0067] PETS (Lonza, USA), the added amount is 0.5%. Embodiment 1-9 and comparative example 1-7: the preparation of polycarbonate composition

[0068] 1) Weigh each component according to the formula content, and dry the polycarbonate, polysiloxane-polycarbonate copolymer, fibrous filler, and other additives that need to be pre-dried at 120°C-130°C , the drying time is set to 4h-6h, to obtain dry-treated polycarbonate, polysiloxane-polycarbonate copolymer, fibrous filler, and other additives;

[0069] 2) Mix the pre-dried polycarbonate, polysiloxane-polycarbonate copolymer, fibrous filler, and other additives through a high-speed mixer. The mixing temperature is 30°C-50°C, and the mixing time is set to Set at 5min-15min to obtain uniformly mixed polycarbonate, polysiloxane-polycarbonate copolymer, fibrous filler, and other additives;

[0070] 3) Pass the uniformly mixed polycarbonate, polysiloxane-polycarbonate copolymer, and other additives through such as figure 1 Feed po...

Embodiment 1

[0074] Embodiment 1, 4 and embodiment 7: Based on the total weight of glass fibers, glass fibers accounting for 50% of the total weight of glass fibers are added from the feeding port 1 in the figure, based on the total weight of glass fibers, accounting for 50% of the total weight of glass fibers The glass fiber of weight 50% obtains embodiment 1 from feeding port 2, embodiment 4, the composition that the component I and the component II that comprise specific glass fiber length distribution and weight ratio of embodiment 7 are formed;

Embodiment 2

[0075] Embodiment 2, 5 and embodiment 8: based on the total weight of glass fibers, glass fibers accounting for 80% of the total weight of glass fibers are added from the feeding port 1 in the figure, based on the total weight of glass fibers, accounting for 80% of the total weight of glass fibers The glass fiber of weight 20% is from feeding port 2, obtains the composition that the component I that comprises specific glass fiber length distribution and weight ratio and component II of embodiment 2,5 and embodiment 8 are formed;

[0076] Continued Table 1 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 Component a 59.19 59.19 59.19 69.19 69.19 79.19 69.19 Component b-1 30

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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 polysiloxane-polycarbonate copolymer, 5-50 parts of fibrous filler and 0-10 parts of other adjuvants, wherein the sum of the weight parts of the components is 100 parts. The fibrous filler comprises a component I and a component II, wherein the component I is composed of fibrous filler bodies with the length of 100-300 micrometers and accounts for 30-50 wt% of the fibrous filler, and the component II is composed of fibrous filler bodies with the length of 400-800 micrometers and accounts for 10-20 wt% of the fibrous filler. Moreover, based on the total weight of the polycarbonate composition, the content of polydimethylsiloxane (PDMS) in the composition is 0.05-30%. According to the polycarbonate composition, the fibrous filler is distributed in the polycarbonate composition in a bimodal mode, while rigidity of the polycarbonate composition is enhanced, the obtained polycarbonate composition has flame retardance and excellent toughness, especially low-temperature toughness, and rigidity and toughness are balanced.

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): C08L69/00C08L83/10C08K13/06C08K9/04C08K7/14C08K5/523C08K5/12C08K5/098B29C47/92B29C48/92
Inventor 刘贤文岑茵佟伟李明昆董相茂郭唐华
Owner KINGFA SCI & TECH CO LTD
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