Novas amidas de poliéster alifáticas resistentes à hidrólise sua preparação e aplicação

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-R1-OH, where R1 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-R2-COOH, where R2 is an aliphatic residue having 1-14 carbon atoms; and a monomeric constituent C which is at least one diamine having a general formula: H2N-R3-NH2, where R3 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.