Patent ID: 6251968
Filing Date: 2001-06-26
Classification: C08L

Abstract:
A method of modifying articles and/or semi-finished products made from polymer resin molding compositions comprising subjecting said articles and/or semi-finished products to biodegradation in accordance with DIN 54 900, said molding compositions containing a mixture of thermoplastic polymers comprising,a first thermoplastic ester amide resin component which is formed from copolymers which contain,A) an ester constituent formed from linear and/or cycloaliphatic bifunctional alcohols and from linear and/or cycloaliphatic bifunctional acids, orB) an ester constituent formed from acid- and alcohol-functionalized components, or a mixture or a copolymer of A) and B), andC) an amide constituent formed from linear and/or cycloaliphatic bifunctional amines and from linear and/or cycloaliphatic bifunctional acids orD) an amide constituent formed from acid- and amine-functionalized components,or a mixture of C) and D) as an amide constituent, the proportion of ester constituent A) and/or B) being at least 30% by weight with respect to the sum of A), B), C) and D); anda second thermoplastic polymer component which is different than said first thermoplastic ester amide resin component,wherein said second thermoplastic polymer component has a degree of biodegradability which is less than the degree of biodegradability of said first thermoplastic ester amide resin component.