Polymer material for ammeter case

A technology for polymer materials and shells. It is applied in the direction of measuring electrical variables, measuring time integration, and instruments. It can solve problems such as expensive fluorine compounds, poor use of polycarbonate resin, and high thermal decomposition temperature.

Active Publication Date: 2009-07-01
CHONGQNG PRET NEW MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluorine compounds are expensive, and these materials alone do not work well with glass fiber reinforced polycarbonate resins, and in fact require additional additives, generally bromine-containing flame retardants
Due to the high processing temperature of glass fiber reinforced PC, the flame retardant used for PC requires a relatively high thermal decomposition temperature, and most of them are brominated high polymers, such as brominated polycarbonate, etc., so the price is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The following examples further describe the present invention, but the examples are only for illustrating the present invention rather than limiting the present invention.

[0023] PC resin and various additives are mixed at a high speed by a high-speed mixer, and then melted and extruded by a twin-screw extruder. The glass fiber is added from the side glass fiber feeding port, and then cooled and granulated to obtain the composition. The temperature is 240-250°C. The processing temperature of the comparative example is 250-260°C.

[0024] Use the following materials:

[0025] PC Teijin, grade 100C

[0026] PC American Dow, grade 301-22

[0027] Glass fiber Manufactured by Jushi Group, grade ER—988

[0028] Brominated polycarbonate American Great Lakes grade BC—52

[0029] Decabromodiphenylethane Nanjing Hengqiao Brand CG—801

[0030] PTFE produced by Shanghai Shangju Chemical Co., Ltd., PTFE content is 75%

[0031] PTW toughening agent, produced by DuPont, USA ...

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PUM

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Abstract

The invention relates to a high molecular material for an ammeter shell, which consists of PC-based resin, glass fiber, main flame retardant, dripping resistant agent, toughening agent, compatilizer, lubricant, and hindered phenol and phosphate ester of antioxidant. The high molecular material is characterized in that the PC is a mixture of two or more than two different PC with 5 to 24 of melt index, the main flame retardant is decabromodiphenylethane, the compatilizer is maleic anhydride grafting ABS, the toughening agent is PTW, and the lubricant is PETS and OP wax; and each component has the following adding weight portion: 490 to 770 portions of the PC-based resin, 100 to 300 portions of the glass fiber, 50 to 70 portions of the main flame retardant, 50 to 100 portions of the compatilizer, 20 to 40 portions of the toughening agent, 5 to 10 portions of the dripping resistant agent, 5 to 10 portions of the lubricant, and 4 to 6 portions of the antioxidant.

Description

technical field [0001] The invention relates to a flame-retardant enhanced polycarbonate composition, in particular to a polymer material for an electric watch case, belonging to the field of polymer alloys. Background technique [0002] The ammeter case needs high rigidity, good appearance, good insulation performance, and flame retardant. At present, flame-retardant ABS is mostly used as the shell material in China. Although flame retardant ABS is cheap, its rigidity is not very good. At present, reinforced PC is mostly used in foreign countries. With the development of my country's economy, a large number of reinforced PC will be used as the material of the meter casing in China. [0003] Glass fiber reinforced polycarbonate resin has high strength and good appearance, and is widely used in the casing of various electrical appliances, especially suitable for injection molding of thin-walled parts. However, glass fiber-reinforced polycarbonate resins are inherently flam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K7/14C08K13/02C08K5/02C08K5/13C08K5/524C08J5/04G01R11/04
Inventor 朱江磊陈永东张祥福周文
Owner CHONGQNG PRET NEW MATERIAL
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