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A kind of temperature controllable polycarbonate composition and preparation method thereof

A technology of polycarbonate and polycarbonate resin, applied in the field of polycarbonate composition and its preparation, can solve the problem of no temperature controllable material and the like, and achieve the effect of solving the dispersion problem

Active Publication Date: 2021-02-23
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no development of temperature-controllable polycarbonate materials. Generally, heat is generated by adding infrared light in the absorption of metal oxides to increase the temperature, but there is no development of temperature-controllable materials.

Method used

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  • A kind of temperature controllable polycarbonate composition and preparation method thereof

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preparation example Construction

[0018] A method for preparing a temperature-controllable polycarbonate composition, using the following steps:

[0019] (1) Disperse deionized water and vanadium dioxide according to the composition of 8:2 with a stirrer, the speed is 200rpm, and the dispersion time is 5min, and the vanadium dioxide dispersion is prepared

[0020] (2) PC resin and anti-oxidant are added in the mixing mixer and mixed, fed from the main feed port of the extruder, and the vanadium dioxide dispersion is fed with a liquid pump from the side feed port of the extruder, and carried out together Mixing and granulation, the extrusion temperature is 260-280° C., the rotation speed is 450-550 rpm, and the pressure is 1.8-2.2 MPa to obtain the temperature-controllable polycarbonate composition.

[0021] The following are more detailed implementation examples, through which the technical solutions of the present invention and the technical effects that can be obtained are further described.

Embodiment 1

[0032] A temperature-controllable polycarbonate composition and a preparation method thereof, the method comprising the following steps:

[0033] (1) PC resin: 80 parts, vanadium dioxide dispersion: 20 parts, antioxidant: 0.5 parts.

[0034] (2) Disperse the deionized water and vanadium dioxide according to the mass fraction of 8:2 with a stirrer, the speed is 200rpm, and the dispersion time is 5min to make a vanadium dioxide dispersion;

[0035] (3) PC resin and anti-oxidant are added in the mixing mixer and mixed, fed from the main feed port of the extruder, and the vanadium dioxide dispersion is fed with a liquid pump from the side feed port of the extruder, and carried out together Mixing and granulation, the extrusion temperature is 260° C., the rotation speed is 450 rpm, and the pressure is 1.8 MPa to obtain the temperature-controllable polycarbonate composition.

Embodiment 2

[0037] A temperature-controllable polycarbonate composition and a preparation method thereof, the method comprising the following steps:

[0038] (1) PC resin: 90 parts, vanadium dioxide dispersion: 10 parts, antioxidant: 0.5 parts.

[0039] (2) Disperse the deionized water and vanadium dioxide according to the mass fraction of 8:2 with a stirrer, the speed is 200rpm, and the dispersion time is 5min to make a vanadium dioxide dispersion;

[0040] (3) PC resin and anti-oxidant are added in the mixing mixer and mixed, fed from the main feed port of the extruder, and the vanadium dioxide dispersion is fed with a liquid pump from the side feed port of the extruder, and carried out together Mixing and granulation, the extrusion temperature is 270° C., the rotation speed is 500 rpm, and the pressure is 2 MPa to obtain the temperature-controllable polycarbonate composition.

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Abstract

The invention relates to a temperature-controllable polycarbonate composition and a preparation method thereof. The composition is prepared from, by weight, 80-99 parts of polycarbonate resin, 1-20 parts of vanadium dioxide dispersion liquid and 0.1-1 part of antioxidant. The preparation method includes: taking deionized water and vanadium dioxide according to a proportion of 8:2, stirring for dispersion to obtain vanadium dioxide dispersion liquid, adding PC resin and the antioxidant into a mixing stirrer for mixing, feeding from a main feeding port of an extruder, and using a liquid pump tofeed the vanadium dioxide dispersion liquid from a lateral feeding port of the extruder for blending granulation to obtain the composition. The method is simple and easy to implement, solid-state thermochromic performance of vanadium dioxide is utilized, and when being lower than phase change temperature, the composition is high in infrared transmittance rate; when being higher than the phase change temperature, the composition is high in infrared reflectivity and is obtained; by means of solution pre-dispersion, the problem of dispersing vanadium dioxide is solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a temperature-controllable polycarbonate composition and a preparation method thereof. Background technique [0002] Due to its excellent transparency, heat resistance and toughness, polycarbonate is widely used in a series of applications such as sun visors, instrumentation, and automobiles. Transparent polycarbonate is completely transparent to infrared light, which tends to cause temperature rise. [0003] Vanadium dioxide (VO 2 ) is a solid thermochromic material, VO 2 The thin film has a semiconductor-metal phase transition characteristic under thermal drive, and the optical transmittance in the infrared region undergoes a reversible mutation before and after the phase transition. At low temperature, VO 2 It is a semiconductor phase with a monoclinic structure; it becomes a metal phase with a tetragonal rutile structure at high temperature. The phase transitio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08K3/22
Inventor 柏莲桂李强辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS