Process for production of polyamide composite material

Details Process for production of polyamide composite material Process for production of polyamide composite material

2007-09-04

2007-09-04

Zemel, Irina S. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S443000, C524S442000, C524S445000, C415S145000

Reexamination Certificate

active

10675951

ABSTRACT:
In the process of the present invention, a polyamide A1 and an organized clay B are mixed mainly by dispersive mixing, and after added with a polyamide A2, mixed mainly by distributive mixing in a corotating intermeshing twin-screw extruder so designed as to effect the dispersive mixing and the distributive mixing. The organized clay B is completely and finely dispersed and distributed throughout the resultant polyamide composite material. Shaped articles such as films and sheets made of the polyamide composite material exhibit excellent gas barrier properties and transparency with little malodor mainly attributable to the decomposed products of the organizing agent for preparing the organized clay B.

REFERENCES:
patent: 4857600 (1989-08-01), Gross et al.
patent: 2001/0056148 (2001-12-01), Sato et al.
patent: 1 156 073 (2001-11-01), None
patent: WO 01/04197 (2001-01-01), None
patent: WO 02/066553 (2002-08-01), None
European Search Report mailed Dec. 2, 2003 for EP No. 03 02 1786.

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