Method for producing conductive masterbatch
AssigneeAsahi Kasei Chemicals Corporation
InventorsKazuya Noda, Takaaki Miyoshi
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Abstract
The present invention relates to a method for producing a conductive masterbatch containing a polyamide resin and a carbonaceous filler. The present invention provides a method for producing a conductive masterbatch which can suppress an increase in resin temperature during extrusion, formation of die drips, and strand breakage and can also significantly increase the output of extruding. The method is achieved by the steps of feeding the carbonaceous filler to a molten first polyamide to melt-knead them together and then feeding a second polyamide to the resulting melt-kneaded product to further melt-knead the second polyamide, the carbonaceous filler, and the first polyamide.
Claims12
A method for producing a conductive resin composition comprising a polyamide resin, a polyphenylene ether and a carbonaceous filler comprising the steps of:
- (1) producing a conductive masterbatch in which 8 to 15% by weight of the carbonaceous filler is incorporated relative to the total weight of the conductive masterbatch, characterized by comprising a first step of melt-kneading a first polyamide and the carbonaceous filler to form a melt-kneaded product and a second step of melt-kneading the melt-kneaded product and a second polyamide, in this order, and
- (2) melting the polyphenylene ether;
- and adding the conductive masterbatch obtained in the step of (1) and the additional amount of polyamide simultaneously to the molten polyphenylene ether.
Dependencies are inferred from the claim text.