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Flame-retardant polycarbonate alloy with excellent chemical resistance and preparation method thereof

A flame-retardant polycarbonate and chemical-resistant technology, applied in the field of flame-retardant polycarbonate alloy and its preparation, can solve the problems of good thermal stability, poor chemical resistance, large molecular weight, etc., and improve solvent resistance. , the effect of excellent chemical resistance

Inactive Publication Date: 2010-10-13
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical resistance of PC / ABS is poor, which limits the application of PC / ABS alloys in certain environments
[0003] Organosilicon compounds, especially some compounds with active functional group structures, have certain compatibility with PC and ABS but poor compatibility, large molecular weight and good thermal stability, and will not decompose below 300 °C

Method used

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  • Flame-retardant polycarbonate alloy with excellent chemical resistance and preparation method thereof
  • Flame-retardant polycarbonate alloy with excellent chemical resistance and preparation method thereof
  • Flame-retardant polycarbonate alloy with excellent chemical resistance and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-3

[0033] A method for preparing a flame-retardant polycarbonate alloy with excellent chemical resistance, the method comprising the following steps:

[0034] (1) prepare materials according to the following components:

[0035] PC: The molecular weight is 20000-30000, using L-1225Y produced by Teijin Chemicals, Dow PC-201-15 or PC-201-10, and Dow PC-201-15 is preferred in the examples.

[0036] ABS: Produced by Kumho, South Korea.

[0037] Organosilicon compound: use Degussa's silicone oil, 4042.

[0038] Flame retardant: bisphenol A type, BDP, produced in Great Lakes, USA.

[0039] Polytetrafluoroethylene (PTFE): produced by Mitsubishi Rayon, A3800. The content of each component is shown in Table 1.

[0040] (2) Mix PC, ABS and organosilicon compound in a medium-speed mixer for 20 minutes to obtain a mixed material;

[0041] (3) The above-mentioned mixed raw materials are put into a twin-screw extruder, and the flame retardant is fed through the side line, and the product ...

Embodiment 4

[0059] A method for preparing a flame-retardant polycarbonate alloy with excellent chemical resistance, the method comprising the following steps:

[0060](1) Prepare materials according to the following components and contents: 70kgPC, 5kgABS, 3kg organosilicon compound, 15kg flame retardant, 1kg anti-dripping agent, among which PC is bisphenol A polycarbonate with a molecular weight of 20000; ABS molecular weight is 80000 , formed by bulk polymerization, wherein the content of butadiene is 30wt%, the content of acrylonitrile is 30wt%, and the content of styrene is 40wt%. It exists in the form of liquid coating; the flame retardant is bisphenol A-bis(diphenyl phosphate), that is, BDP, and its structural formula is as follows:

[0061]

[0062] The anti-dripping agent is polytetrafluoroethylene coated with polymethyl methacrylate, the content of polytetrafluoroethylene is 50wt%, and the remaining components are polymethyl methacrylate;

[0063] (2) Mix PC, ABS, organosilic...

Embodiment 5

[0066] A method for preparing a flame-retardant polycarbonate alloy with excellent chemical resistance, the method comprising the following steps:

[0067] (1) Prepare materials according to the following components and contents: 75kgPC, 10kgABS, 1kg organosilicon compound, 10kg flame retardant, 3kg anti-dripping agent, wherein PC is aromatic polycarbonate with a molecular weight of 30000; ABS molecular weight is 150000, passed It is polymerized by emulsion method, in which the content of butadiene is 20wt%, the content of acrylonitrile is 10wt%, and the content of styrene is 70wt%. The flame retardant is a phosphorus-based flame retardant; the anti-dripping agent is polytetrafluoroethylene (PTFE) coated with polymethyl methacrylate (PMMA), the content of PTFE is 55wt%, and the remaining components are polymethyl methacrylate (PMMA). Methyl acrylate;

[0068] (2) Mix PC, ABS, organosilicon compound and anti-dripping agent in a medium-speed mixer for 20 minutes to obtain a mix...

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Abstract

The invention relates to a flame-retardant polycarbonate alloy with excellent chemical resistance and a preparation method thereof. The alloy comprises the following components in part by weight: 70 to 90 parts of PC, 5 to 20 parts of ABS, 0.5 to 3 parts of organic silicon compound and 10 to 20 parts of flame retardant. The preparation method comprises the following steps of: mixing the PC, the ABS and the organic silicon compound in an intermediate-speed mixer, feeding the mixture into a double-screw extruder, feeding the flame retardant into the extruder through a lateral line, and smelting, extruding and granulating the mixture to obtain a product. Compared with the prior art, the organic silicon compound adopted for modifying the PC / ABS is favorable for improving the solvent resistance of the PC / ABS alloy so that the alloy has excellent chemical resistance.

Description

technical field [0001] The invention relates to a polycarbonate alloy and a preparation method thereof, in particular to a flame-retardant polycarbonate alloy with excellent chemical resistance and a preparation method thereof. Background technique [0002] PC is an amorphous engineering plastic with excellent impact strength, thermal stability, gloss, antibacterial properties, flame retardant properties and anti-pollution properties. However, due to its high molecular rigidity and steric hindrance, its high melting temperature (270--320 ° C) is difficult to process, and it is difficult to produce large thin-walled products, and the residual stress in the product is large, and stress cracking is prone to occur. At the same time, PC is sensitive to gaps. Although PC is stable to acidic and oily media, it is not resistant to alkali, which limits the practical application of PC. ABS resin has good processability and mechanical properties. Therefore, PC / ABS is a plastic alloy ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L55/02C08L83/04C08L83/07C08L27/18C08L33/12C08K5/523
Inventor 杨春华徐本刚罗明华李荣群辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS