The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2001
Filed:
Apr. 12, 1999
BK Giulini Chemie GmbH Co OHG, Ludwigshafen, DE;
Abstract
An aliphatic polyester amide which is hydrolysis-resistant includes a ternary polycondensation product of monomeric constituents composed of a monomeric constituent A which is at least one diol having a general formula: HO—R,—OH, where R,is an aliphatic residue having 2-16 carbon atoms; a monomeric constituent B which is at least one dicarboxylic acid having a general formula: HOOC—R,—COOH, where R,is an aliphatic residue having 1-14 carbon atoms; and a monomeric constituent C which is at least one diamine having a general formula: H,N—R,—NH,, where R,is an aliphatic residue having 2-16 carbon atoms and is present in an amount of up to about 5% by weight based on total weight of the monomeric constituents, wherein polycondensation proceeds in the presence of a catalyst comprised of constituent D, which is a metal-containing catalyst, in combination with constituent E, which is at least one of an organic phosphorus compound and an inorganic phosphorus compound, and wherein the ternary polycondensation product is subsequently treated with constituent F, a multivalent isocyanate compound, at a temperature reduced to about 150° C. or less for a maximum of 10 minutes so that the aliphatic polyester amide has chain terminations which are partially isocyanate-terminated and so that the ternary polycondensation product has a viscosity of at least 50,000 cPs as measured by an automatic Ubbelohde Viskosimeter in xylene at 25° C.