Continuous process for preparing particulate microporous, open-c

Details Continuous process for preparing particulate microporous, open-c Continuous process for preparing particulate microporous, open-c

1975-05-12

1977-08-09

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

260 25M, 264 9, 264 28, 264 41, 264 49, 264DIG5, 264DIG13, B29D 2700

Patent

active

040411150

ABSTRACT:
A continuous process for preparing particulate microporous, open-celled polymer structures in a co-rotating twin-screw processor comprising agitating normally solid organic polymer and chlorofluorocarbon in the melt zone of said processor, cooling the resulting solution under agitation in the cooling and milling zone, extruding a snow-like mass from the cooling and milling zone, and then removing the chlorofluorocarbon from the snow-like mass to leave the polymer structures.

REFERENCES:
patent: 3308211 (1967-03-01), Plastridge
patent: 3462337 (1969-08-01), Gorton
patent: 3468986 (1969-09-01), Watanabe
patent: 3752784 (1973-08-01), Jenkins
patent: 3753932 (1973-08-01), Jenkins
patent: 3812224 (1974-05-01), Smith et al.
patent: 3936517 (1976-02-01), Thomas
Natta, Giulio "Progress in Five Years of Research in Stereospecific Polymerization," in SPE Journal, May 1959, pp. 373-382.
Brandrup, J. and E. H. Immergut, Editors, "Polymer Handbook," New York, Interscience, c1966, pp. III-33, 34, 37, 39, 42, 46, 48, 51, 52, 57, 64, 65, 68, 71, 72, 74, 85, 86, 87, 88.

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