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A kind of weather-resistant polycarbonate composition and preparation method thereof

A technology of polycarbonate and polycarbonate resin, applied in the field of weather-resistant polycarbonate composition and preparation thereof, can solve the problems of insufficient concentration of light stabilizer, low molecular weight, inability to obtain weather resistance, etc. The effect of high mobility

Active Publication Date: 2017-06-13
SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent achieves the effect of weather resistance by adding 2,4-dihydroxybenzophenone, but because the light stabilizer is evenly distributed throughout the material system, the concentration of the light stabilizer on the surface is insufficient, and 2,4-dihydroxybenzophenone Ketones have low molecular weight and are easy to precipitate, so they cannot get better weather resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A weather-resistant polycarbonate composition and a preparation method thereof, the method comprising the following steps:

[0036] (1) Weigh each component by weight: PC: 95 parts, PTMG1000: 5 parts, benzophenone: 0.5 parts, antioxidant 1010: 0.1 parts, antioxidant 168: 0.1 parts, lubricant PETS: 0.1 parts share.

[0037] (2) First mix polytetrahydrofuran and benzophenone into an extruder, melt and extrude at 200-280° C., and the screw extruder rotates at 500 rpm to prepare polytetrahydrofuran weather-resistant masterbatches.

[0038] (3) The screw diameter of the extruder is 35 mm, and the aspect ratio is 32.

[0039] (4) Add polytetrahydrofuran weather-resistant masterbatch, polycarbonate resin, resin, antioxidant and lubricant into a mixing mixer for mixing; the resulting mixture is blended and granulated by a twin-screw extruder, melt-extruded, and granulated That is, the obtained product is a weather-resistant polycarbonate composition.

Embodiment 2

[0041] A weather-resistant polycarbonate composition and a preparation method thereof, the method comprising the following steps:

[0042] (1) Weigh each component by weight: PC: 80 parts, PTMG1000: 20 parts, benzophenone: 0.1 part, antioxidant 1010: 0.1 part, antioxidant 168: 0.1 part, lubricant PETS: 0.1 part share.

[0043] (2) The polytetrahydrofuran and benzophenone are first mixed and then put into an extruder, melted and extruded at 200-280° C., and the rotation speed of the screw extruder is 500 rpm to prepare polytetrahydrofuran weather-resistant masterbatches.

[0044] (3) The screw diameter of the extruder is 35 mm, and the aspect ratio is 32.

[0045] (4) Add polytetrahydrofuran weather-resistant masterbatch, polycarbonate resin, resin, antioxidant and lubricant into a mixing mixer for mixing; the resulting mixture is blended and granulated by a twin-screw extruder, melt-extruded, and granulated That is, the obtained product is a weather-resistant polycarbonate c...

Embodiment 3

[0047] A weather-resistant polycarbonate composition and a preparation method thereof, the method comprising the following steps:

[0048] (1) Weigh each component by weight: PC: 90 parts, PTMG1000: 10 parts, benzophenone: 0.3 parts, antioxidant 1010: 0.1 parts, antioxidant 168: 0.1 parts, lubricant PETS: 0.1 parts share.

[0049] (2) The polytetrahydrofuran and benzophenone are first mixed and then put into an extruder, melted and extruded at 200-280° C., and the rotation speed of the screw extruder is 500 rpm to prepare polytetrahydrofuran weather-resistant masterbatches.

[0050] (3) The screw diameter of the extruder is 35 mm, and the aspect ratio is 32.

[0051] (4) Add polytetrahydrofuran weather-resistant masterbatch, polycarbonate resin, resin, antioxidant and lubricant into a mixing mixer for mixing; the resulting mixture is blended and granulated by a twin-screw extruder, melt-extruded, and granulated That is, the obtained product is a weather-resistant polycarbona...

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PUM

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Abstract

The invention relates to a weather-resistant polycarbonate composition and a preparation method thereof, which is prepared from the following components and raw materials in parts by weight: polycarbonate resin 50-90, polytetrahydrofuran 5-20, benzophenone 0.1-0.5; Antioxidant 0.1 ~ 1, lubricant 0.1 ~ 1, first mix polytetrahydrofuran and benzophenone and then enter the extruder to obtain polytetrahydrofuran weathering masterbatch, then add polycarbonate resin, antioxidant and lubricant to the mixing mixer Mixing in the middle, and finally blending and granulation by a twin-screw extruder, melt extrusion, and granulation to obtain a product to prepare a weather-resistant polycarbonate composition. Compared with the prior art, the invention can protect the polycarbonate in the characteristic wave band, thereby improving the weather resistance performance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a weather-resistant polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate resin is widely used in automobiles, electronics, home appliances and other fields due to its excellent impact performance and heat resistance performance. Because the ester bond of polycarbonate is broken by the ultraviolet radiation of sunlight, resulting in defects such as color change and performance degradation of polycarbonate products, therefore, polycarbonate resin needs to be modified. [0003] At present, polycarbonate resin mainly improves weather resistance by adding various light stabilizers and ultraviolet absorbers. Its weathering effect depends on many factors, including the characteristic absorption band of the weathering agent, stability and distribution in the polymer. The destructive penetration depth of ultraviolet rays to ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L71/00C08K5/07C08K5/134C08K5/526C08K5/103
Inventor 柏莲桂李强罗明华辛敏琦
Owner SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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