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Polycarbonate composition and preparation method thereof

A polycarbonate and composition technology, applied in the field of engineering plastics, can solve the problems of easy adsorption, high surface energy, low surface hardness, etc., and achieve the effect of improving the ability of impact energy, effective blocking effect, and improving anti-fouling ability.

Active Publication Date: 2020-11-27
TIANJIN KINGFA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of an ester group structure in the middle of the polycarbonate molecule, the surface energy of the material is high, and it is easy to absorb dust and dirt in the air during application, making the surface not resistant to dirt. At the same time, due to its low surface hardness, it is difficult to wipe It is very easy to cause appearance problems such as scratches
[0003] At present, in the application of PC, the dimensional stability and rigidity of the PC composition are mainly improved by adding fibrous fillers, but general fibrous fillers will add some additives during processing to improve the agglomeration performance of glass fibers. Additives will also increase the surface energy of the composition to a certain extent, thereby reducing the antifouling ability of the material

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A polycarbonate composition, which is made of the following raw materials in parts by weight: 92 parts of polycarbonate, 5 parts of glass fiber, 0.6 parts of silicon-containing compound A, and 2.4 parts of silicon-containing compound B.

[0038] The preparation method of described polycarbonate composition, comprises the steps:

[0039] (1) Cool the fibrous filler to normal temperature after burning, and pre-dry the polycarbonate and the burned fibrous filler for later use. The burning temperature is 650°C, the time is 20 minutes, and the drying temperature is 120°C for 5 hours;

[0040] (2) Mix the pre-dried polycarbonate and the surface energy improver evenly to obtain a mixed premix, and then add the fibrous filler side-feed;

[0041] (3) Add the premix and fibrous filler respectively into the twin-screw extruder. The temperature of the twin-screw extruder is 240°C in the first zone, 245°C in the second zone, 255°C in the third zone, and 255°C in the fourth zone. ℃...

Embodiment 2

[0043] A polycarbonate composition, which is made of the following raw materials in parts by weight: 87 parts of polycarbonate, 10 parts of glass fiber, 0.9 parts of silicon-containing compound A, and 2.1 parts of silicon-containing compound B.

[0044] The preparation method of described polycarbonate composition, comprises the steps:

[0045] (1) Cool the fibrous filler to normal temperature after burning, and pre-dry the polycarbonate and the burned fibrous filler for later use. The burning temperature is 650°C, the time is 20 minutes, and the drying temperature is 120°C for 5 hours;

[0046] (2) Mix the pre-dried polycarbonate and the surface energy improver evenly to obtain a mixed premix, and then add the fibrous filler side-feed;

[0047](3) Add the premix and fibrous filler respectively into the twin-screw extruder. The temperature of the twin-screw extruder is 240°C in the first zone, 245°C in the second zone, 255°C in the third zone, and 255°C in the fourth zone. ℃...

Embodiment 3

[0049] A polycarbonate composition, which is made of the following raw materials in parts by weight: 76 parts of polycarbonate, 20 parts of glass fiber, 1.2 parts of silicon-containing compound A, and 2.8 parts of silicon-containing compound B.

[0050] The preparation method of described polycarbonate composition, comprises the steps:

[0051] (1) Cool the fibrous filler to normal temperature after burning, and pre-dry the polycarbonate and the burned fibrous filler for later use. The burning temperature is 650°C, the time is 20 minutes, and the drying temperature is 120°C for 5 hours;

[0052] (2) Mix the pre-dried polycarbonate and the surface energy improver evenly to obtain a mixed premix, and then add the fibrous filler side-feed;

[0053] (3) Add the premix and fibrous filler respectively into the twin-screw extruder. The temperature of the twin-screw extruder is 240°C in the first zone, 245°C in the second zone, 255°C in the third zone, and 255°C in the fourth zone. ...

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Abstract

The invention provides a polycarbonate composition. The polycarbonate composition is prepared from the following raw materials in parts by weight: 80-95 parts of polycarbonate, 5-20 parts of glass fiber filler and 1-5 parts of a surface energy improver. According to the polycarbonate composition and a preparation method thereof disclosed by the invention, the glass fibers are subjected to ablationtreatment, so that the surface tension of the glass fibers is greatly reduced, the binding force of the glass fibers and the resin is greatly reduced, the glass fibers and the resin can be effectively peeled off under the impact force, the impact energy absorption capacity of the material is improved, and the actual impact strength of the material is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, in particular to a polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a commonly used engineering plastic with good material toughness and is widely used in automobiles, home appliances and other fields. However, due to the presence of an ester group structure in the middle of the polycarbonate molecule, the surface energy of the material is high, and it is easy to absorb dust and dirt in the air during application, making the surface not resistant to dirt. At the same time, due to its low surface hardness, it is difficult to wipe It is very easy to cause appearance problems such as scratches. [0003] At present, in the application of PC, the dimensional stability and rigidity of the PC composition are mainly improved by adding fibrous fillers, but general fibrous fillers will add some additives during processing to impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K9/06C08K9/00C08K7/14C08J5/08
CPCC08J5/08C08J2369/00C08K9/08C08K9/00C08K7/14
Inventor 李明昆陈勇文王中林佟伟丁超岑茵吴俊彭民乐
Owner TIANJIN KINGFA NEW MATERIAL