Miles Inc.

Gary W Munko

Harald Pielartzik

Douglas A Wicks

Rick L Archey

Aaron D Meltzer

Dittmar K Nerger

An improvement in the process of preparing nylon-1 by the polymerization of isocyanates is disclosed. Accordingly, the improvement comprising using in the process a catalyst conforming to

Polymerization catalyst for the preparation of poly(isocyanates)

A process for preparing a block oligocarbonate is disclosed. The oligocarbonate conforms to ##STR1## where R denotes hydrogen or ##STR2## and where A denotes an aromatic carbonate structure conforming to ##STR3## where Ar is an aromatic radical, n is 2-6 and where B is the residue of an aliphatic polyol is disclosed. In the process a high molecular weight aromatic polycarbonate is reacted, in the melt and in the presence of a catalyst, with an aliphatic polyol. The block oligocarbonate is useful as a reactant in a process for the preparation of copolymers.

Growing community of inventors

Coraopolis, PA, United States of America

Gary W Munko