Process for the polymerization of formaldehyde in the presence o

Details Process for the polymerization of formaldehyde in the presence o Process for the polymerization of formaldehyde in the presence o

1975-12-22

1976-12-28

Lieberman, Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 332R, 260 336R, 260 338R, 260 4585R, 260 4595R, C08L 7700

Patent

active

040002179

ABSTRACT:
Polyoxymethylene is prepared by feeding anhydrous formaldehyde into a reaction medium containing a liquid organic diluent non-solvent for the polyoxymethylene and non-reactive towards the other constituents of the reaction medium, and containing in a dispersed form a polymer A carrying a terminal ionic couple on its macromolecular chain, said polymer A being a polylactamic block of recurring units ##STR1## wherein PM is a linear polymethylene chain having from 3 to 13 carbon atoms, and being present in a proportion of from 0.001 to 0.1% by weight with respect to the polyoxymethylene.

REFERENCES:
patent: 2993025 (1961-07-01), Alsvp
patent: 3204012 (1965-08-01), Eguchi
patent: 3235624 (1966-02-01), Green
patent: 3288885 (1966-11-01), Green

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