Fine-grained polyether-ketone powder, process for the manufactur

Details Fine-grained polyether-ketone powder, process for the manufactur Fine-grained polyether-ketone powder, process for the manufactur

1992-06-01

1993-09-21

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525153, C08G 802

Patent

active

052470520

ABSTRACT:
A fine-grained polyether-ketone powder, having a particle size with a d.sub.50 value smaller than or equal to 40 .mu.m and a grain size distribution range smaller than or equal to 55 .mu.m, is obtained by cold-grinding of coarse-grained polyether-ketone in a fluid-bed opposed-jets mill, which is provided with a grinding chamber (2) subjected to gas jets, a grinding material-charging device, a screening device (5) for separating coarse material (11) and fine material (10), and a bottom (3) underneath the grinding chamber for added material to be ground and coarse material flowing back from the screening device, the material to be ground and the coarse material flowing back from the screening device being cooled by means of a cryogenic refrigerant.
The powders obtained in this way are used for producing surface coatings or composites.

REFERENCES:
patent: Re32595 (1988-02-01), Davis
patent: 4440916 (1984-04-01), Waters et al.
patent: 4578427 (1986-03-01), Saito et al.
patent: 4703075 (1987-10-01), Egami
patent: 4957962 (1990-09-01), Winkler et al.
patent: 4977218 (1990-12-01), Gardner et al.
Plastics Engineering, Band 44, Sep. 1988 "Pulverizing PEEK without cryogenics".
Soviet Inventions Illustrated, Woche 8431, Sep. 1984.
ANTEC 1988 Conference Proceedings of the Society of Plastics Engineers, Atlanta, Apr. 18-21, 1988.

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