Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1981-08-12
1983-06-28
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528241, 528270, C08G 210
Patent
active
043906842
ABSTRACT:
A continuous polymerization method to obtain polymer production in the form of fine particles from a liquid polymerization medium; the reaction being conducted in a polymerization reactor wherein mixing is effected by the action of a plurality of elliptical paddles mounted on each of dual rotating shafts, characterised in that the dual shafts are rotated in reverse directions to each other, and the paddles being enclosed by walls of the reactor with the inside surface of the walls closely defining the surface generated by the rotation of the ends of both sets of paddles; and with the ends of major axes of the elliptical paddles on one rotating shaft periodically approaching the ends of minor axes of the corresponding elliptical paddles on the other rotating shaft to effect a mixing action as well as a longitudinal shearing action across a notional interface between the two shafts. The method is particularly useful for the polymerization of trioxane.
REFERENCES:
patent: 3253818 (1966-05-01), Seddon et al.
patent: 3254053 (1966-05-01), Fisher et al.
patent: 3275602 (1966-09-01), Weiss et al.
patent: 3447582 (1969-06-01), Street
patent: 4105637 (1978-08-01), Semanchik et al.
patent: 4301273 (1981-11-01), Sugio et al.
Hotta Hiroshi
Ikenaga Yukio
Komazawa Hiroyasu
Mori Tadashi
Nakashima Tuneyasu
Lin Maria C. H.
Phynes Lucille M.
Polyplastics Co. Ltd.
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