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Flame-retardant polycarbonate composite material and preparation method thereof

A technology of flame retardant polycarbonate and composite materials, applied in the field of polymer materials, can solve the problems of large amount of addition and influence on other properties of materials, and achieve the effects of low cost, small impact on performance and good flame retardant stability

Active Publication Date: 2020-02-04
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Or, in order to ensure the stability of flame-retardant polycarbonate, only some neutral and mild flame retardants can be added, resulting in a large amount of addition and a greater impact on other properties of the material
[0004] By controlling the synthesis of polycarbonate to obtain polycarbonate in a specific parameter range, the method of improving the stability of polycarbonate after adding flame retardant has not been reported so far

Method used

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Examples

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Embodiment Construction

[0038] The present invention is further illustrated by the following examples, but the present invention is not limited by the following examples.

[0039] The sources of raw materials used in the present invention are as follows, but are not limited by the following raw materials.

[0040] The synthetic monomers of the following polycarbonates are bisphenol A and its derivatives

[0041] Polycarbonate A: The weight average molecular weight is about 27500, the molecular weight distribution index PDI is 2.1, the pH of the polycarbonate solution is 7.0, and the Tg temperature change of multiple cycles is 3.0°C. It is prepared by the phosgene method, and the set weight is obtained by controlling the reaction parameters. Average molecular weight, PDI, and then control the pH value through acid-base adjustment to obtain multiple cycle Tg temperature changes;

[0042] Polycarbonate B: The weight-average molecular weight is about 28000, the molecular weight distribution index PDI is...

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PUM

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Abstract

The invention discloses a flame-retardant polycarbonate composite material which comprises the following components in parts by weight: 60-100 parts of polycarbonate and 1-25 parts of flame retardant,wherein the weight average molecular weight of the polycarbonate is greater than 26000; the molecular weight distribution index PDI is less than 2.2; the pH value of a polycarbonate solution is 6.7-7.1; and the Tg temperature changes in multiple cycles. The invention finds that the flame retardant has less influence on the stability of the polycarbonate when the polycarbonate is within the parameter range.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant polycarbonate composite material and a preparation method thereof. Background technique [0002] At present, polycarbonate (PC) is widely used in the production of various industrial and civil parts (such as various transparent parts, lampshades, instrument panels, etc.). In order to expand the application range of polycarbonate, flame retardant modification is required. However, since the stable state of polycarbonate is weakly acidic, the addition of flame retardants will change the overall pH value and affect the stability of polycarbonate, especially the basic metal elements contained in flame retardants (such as antimony dioxide ), free bromine in brominated flame retardants will cause weakly acidic polycarbonate to decompose during melt processing, thereby reducing its performance and even failing to meet the application standards. [0003] Gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K5/5399C08K5/523C08K5/526C08K5/103
CPCC08K5/103C08K5/523C08K5/526C08K5/5399C08L2201/02C08L2201/08C08L69/00
Inventor 岑茵黄险波叶南飚李明昆艾军伟吴俊丁超
Owner KINGFA SCI & TECH CO LTD
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