Hyperbranched polyesters and polyamides
AssigneeCornell Research Foundation, Inc.
InventorsJean M. J. Frechet, Craig J. Hawker, Kathryn Uhrich
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Abstract
Hyperbranched polyester and polyamide polymers are prepared by a one-step process of polymerizing a monomer of the formula A-R-B.sub.2 so that high molecular weight globular polymers having a multiplicity of a particular functional group on the outside surface are obtained.
Claims4
A hyperbranched aromatic polyamide homopolymer having a molecular weight of at least about 1,000 daltons as determined by gel permeation chromatography with polystyrene calibration and at least 40% branching and prepared by a bulk condensation polymerization of a monomer of the formula A-R-B.sub.2 wherein (i) R is an aromatic moiety and (ii) A and B undergo an amidation reaction at a temperature of about 150 to 300.degree. C. which generates a gaseous by-product.
Dependencies are inferred from the claim text.