BIOLOGICALLY DISINTEGRATABLE COMPOSITE FILMS

• Main Authors: MEYER, Axel, YAMAMOTO, Motonori, DIEHL, Heiko, BEYERS, Cornelis Petrus, DAHMEN, Stefan, KRIEGISCH, Volker, LICHT, Ulrike
• Format: Patent
• Language: English; French; German
• Published: 10.04.2019
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES

The invention relates to the use of an aqueous polyurethane dispersion adhesive for producing biologically disintegratable composite films, wherein at least two substrates are glued to each other using the polyurethane dispersion adhesive, wherein at least one of the substrates is a biologically disintegratable polymer film. The polyurethane is made up to at least 60 wt % of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxycarboxylic acid and diaminocarboxylic acid.