Abstract: Biodegradable polyesters based onA) 95-99.99 mol % of at least one polyester A containing as monomeric building blocks of an acid component comprisinga.sub.11) 20-95 mol % of at least one aliphatic or cycloaliphatic dicarboxylic acid or its ester-forming derivative anda.sub.12) 5-80 mol % of at least one aromatic dicarboxylic acid or its ester-forming derivative andat least one dihydroxy compound or at least one amino alcohol or their mixtures, andB) 0.01-5 mol % of a mixture comprising mono-, bi-, tri-, tetra- and higher-nuclear isocyanurates or corresponding compounds containing two, three or four functional groups capable of reacting with the end groups of polyester A, or mixtures of the isocyanurates and the corresponding compounds,as well as molding compositions comprising said polyesters, their manufacture and their use in the manufacture of moldings, filsm, fibers and coatings.

Abstract: The aqueous dispersion of a biodegradable aliphatic-aromatic polyester is useful as a binder for nonwovens and for coating paper.

Abstract: Biodegradable polyesters having a molecular weight (M.sub.n) of from 5000 to 50,000 g/mol (measured by gel permeation chromatography), a viscosity number of from 30 to 350 g/ml (measured in 50:50 by weight of o-dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester at 25.degree. C.), and a melting point of from 50 to 170.degree. C., and having both hydroxyl and carboxyl end groups, the molar ratio of carboxyl end groups to hydroxyl end groups being greater than one, which is obtained by reacting a mixture consisting essentially ofa.sub.1) a mixture consisting essentially offrom 45 to 80 mol % of adipic acid or ester-forming derivatives thereof, or mixtures thereof,from 20 to 55 mol % of terephthalic acid or ester-forming derivatives thereof, or mixtures thereof, andfrom 0 to 5 mol % of a sulfonate compound,where the sum of the individual mole percentages is 100 mol %, anda.sub.2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.