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Production method of nonflammable thermoplastic resin composite

A technology of resin composition and manufacturing method, which is applied in the field of manufacture of flame-retardant thermoplastic resin composition, and can solve the problems of blockage of feeding port, blockage, difficulty in adding PTFE aqueous dispersion, etc.

Inactive Publication Date: 2004-02-25
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to add PTFE water-based dispersion. The pump of the feeding and output equipment of PTFE water-based dispersion is prone to clogging during long-term operation. In addition, after the water-based dispersion is added to the extruder, it is also easy to produce Blocking, which affects the accuracy of the actual amount added, is not ideal in manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0010]In the production method of the flame-retardant thermoplastic resin composition of the present invention, the powdery polyfluororesin (A) used is a resin containing fluorine, preferably a dry powdery resin with a moisture content of 3% by weight or less, specifically Examples include: polytetrafluoroethylene resin (i.e. PTFE), the average particle size of the above-mentioned powdery polyfluororesin (A) is 60-2000 μm, preferably 70-1000 μm, when the average particle size is greater than 60 μm, the extrusion It is not easy to produce bridging phenomenon when feeding the manufactured materials, that is, it is not easy to form lumps and block the entrance of the extruder. When the average particle size of the powdery polyfluororesin (A) is less than 2000 μm, the feeding amount is relatively stable, and the powdery polyfluororesin (A) in the resin composition is uniformly dispersed, which can prevent dripping and burning. The above-mentioned powdery polyfluororesin (A) is add...

preparation example

[0043] The used raw material models and specifications of the following embodiments of the present invention and comparative examples are as follows:

[0044] (A-1): powdery polytetrafluoroethylene resin-average particle size 500 μm, product of DuPont, USA TEFLON-GCJ, hereinafter referred to as powdery PTFE.

[0045] (A-2): Emulsion polytetrafluoroethylene resin - the average particle size is less than 50 μm, hereinafter referred to as emulsion PTFE.

[0046] (B 1-1): powdery polycarbonate resin-particle size less than 1000 μm, manufactured by Mitsubishi Chemical, product model Iupilon S-2000F, hereinafter referred to as powdery PC.

[0047] (B 1 -2): Powdered styrene-acrylonitrile copolymer - the particle size obtained after pulverization is less than 1000 μm, manufactured by Taiwan Chimei Corporation, product model KIBISAN PN-117, hereinafter referred to as powdered AS.

[0048] (B 1 -3): Granular styrene-acrylonitrile copolymer- (particle size greater than 3 mm), manufa...

Embodiment 2

[0060] With mode of operation, but the difference is: the aromatic polyphosphate flame retardant (D-3) of 8 weight parts is changed into triphenyl phosphate flame retardant (D-2), and all the other extrude The feeding and discharging conditions remain unchanged, and the evaluation results are listed in Table 1.

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Abstract

The production method of flame-retardant thermoplastic resin composition includes the following steps: pre-mixing 0.01-10 weight portions of powder polyfluororesin whose average grain size is 60-2000micrometers, 0.02-20 weight portions of powder thermoplastic resin and / or powder compound to obtain mixture, then mixing said mixture with 100 weight portions of thermoplastic resin and 0.1-40 weightportions of fire-resisting agent and extruding by means of extruding machine.

Description

technical field [0001] The present invention relates to a manufacturing method of a flame retardant thermoplastic resin composition, in particular to a flame retardant resin composition which is smooth and unblocked during the extrusion process, and the prepared composition has excellent flame retardant properties. A method for producing a thermoplastic resin composition. Background technique [0002] Flame-retardant polystyrene resin and polycarbonate resin composite composition, or polyphenylene oxide resin (polyphenylene oxide), polybutylene terephthalate (Polybutylene terephthalate, referred to as PBT), polyterephthalate Polyethylene glycol terephthalate (PET) and other engineering plastics are often used as housing materials for household electrical appliances, office electrical appliances, or other electrical appliances. Among them, flame-retardant polystyrene resins and polycarbonate resins The mixture is glued, which is widely used to make casings for computer monit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12
Inventor 苏文义
Owner CHI MEI CORP