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publicationDate 1987-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-4665136-A
titleOfInvention Process for producing novel block alkylene polycarbonate copolymers
abstract The present invention is a novel class of block copolymers and a process of making the same. An alkylene oxide is reacted with CO 2 in an organic solvent in the presence of an organometallic catalyst to form a polyalkylene carbonate. A second alkylene oxide is subsequently added without the addition of catalyst. The resulting product is a block copolymer comprising distinct, covalently linked, alkylene carbonate blocks.
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