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A kind of low yellowness polycarbonate material and preparation method thereof

A polycarbonate and yellowness technology, applied in the field of low yellowness polycarbonate materials and their preparation, can solve the problem of polycarbonate yellowing and other problems, and achieve the effects of excellent effect, excellent surface performance and good effect.

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only uses phosphorus antioxidants to solve some of the factors that cause polycarbonate yellowing, but the yellowing caused by metal impurities cannot be solved.

Method used

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  • A kind of low yellowness polycarbonate material and preparation method thereof
  • A kind of low yellowness polycarbonate material and preparation method thereof
  • A kind of low yellowness polycarbonate material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the polycarbonate solution using solvent 1 (the concentration of the polycarbonate solution is 25wt%, the weight average molecular weight is 28000), 50ppm (based on polycarbonate, the same below) are added to remove the stabilizer 2 and 500ppm of the metal remover. Filter with a filter with a precision of 1 μm, put the filtered polycarbonate solution into a reaction kettle (1000L) with a gas condensation recovery system at a stirring speed of 200rpm, and pass high-temperature steam (180 ° C steam) into the polymer. Inside the carbonate solution, the mass ratio of steam and polycarbonate solution is controlled to be 1:15, the polycarbonate solution is removed from the solvent at a certain stirring rate for 2 hours, and the removed solvent is condensed and recovered to obtain a polycarbonate product.

Embodiment 2

[0037] Similar to Example 1, in the polycarbonate solution of solvent 1, add 200ppm of solvent to remove stabilizer 2 and 500ppm of metal remover, filter through a filter with a precision of 1 μm, and remove the solvent under the action of steam at 180 °C, A polycarbonate product is obtained.

Embodiment 3

[0039] Similar to Example 1, in the polycarbonate solution of solvent 1, add 800ppm of solvent to remove stabilizer 2 and 500ppm of metal remover, filter through a filter with a precision of 1 μm, and remove the solvent under the action of steam at 180 °C, A polycarbonate product is obtained.

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Abstract

The invention provides a low yellowness polycarbonate material and a preparation method thereof. In the method, a solvent removal stabilizer and a metal remover are added to a polycarbonate solution, wherein the amount of the solvent removal stabilizer is 50-1000ppm , the amount of metal remover is 50-1000ppm. By adding the above two additives and optimizing the preparation method, on the one hand, the polycarbonate solution can be kept stable and not yellowed during the process of removing the solvent by steam; The residual color-developing metal elements are complexed to form a colorless substance, thereby obtaining a low-yellow polycarbonate material.

Description

technical field [0001] The invention relates to a low yellowness polycarbonate material and a preparation method thereof. Background technique [0002] Polycarbonate materials have been widely used in electronic appliances, automobiles, daily necessities and other fields due to their excellent heat resistance, impact strength and other properties. At present, the production process of polycarbonate mainly adopts the interface phosgene method and the melt transesterification method. In the actual processing and application of polycarbonate materials, especially in the application fields of films, optical parts, and car lights, the parts should avoid yellowing in color, which requires low yellowness and good thermal stability of polycarbonate materials. In order to obtain polycarbonate materials with low yellowness, many related invention patents have been technically disclosed. [0003] For example, the invention patent CN 101412808 A "manufacturing method of polycarbonate"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/40
Inventor 张钊王亚辉王栋孙永旭吴雪峰张宏科
Owner WANHUA CHEM GRP CO LTD