Coextrudierbarer Schmelzklebstoff

• Main Authors: VIANDEN, DIRK, HEEMANN, MARCUS, PUERKNER, ECKHARD, SCHROEDER, MAJA, ERB, VOLKER
• Format: Patent
• Language: German
• Published: 18.06.2009
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DYES; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PAINTS; PERFORMING OPERATIONS; POLISHES; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS AS ADHESIVES; WORKING-UP

Schmelzklebstoff für wiederverschließbare Verpackungen enthaltend 30 bis 90 Gew.-% mindestens eines Copolymeren auf Basis von Ethylen und/oder Propylen zusammen mit C4 bis C12-alpha-Olefinen, das durch Metallocene-katalysierte Polymerisation erhältlich ist, mit einem melt index von 5 bis 100 g/10 min (DIN ISO 1133), 5 bis 50 Gew.-% von Klebrigharzen mit einem Erweichungspunkt von 80 bis 140°C, 0 bis 15 Gew.-% Wachse mit einem Schmelzpunkt von 120 bis 170°C, 0,1 bis 20 Gew.-% Additive und Hilfsstoffe, wobei der Klebstoff eine Viskosität von 25000 mPas bis 250000 mPas gemessen bei einer Temperatur von 170 bis 190°C aufweist. A hot-melt adhesive for resealable packaging, containing 30 to 90 wt. % of at least one copolymer based on ethylene and/or propylene together with C4 to C12-α-olefins, which is obtainable by metallocene-catalyzed polymerization, with a melt index of 5 to 100 g/10 min (DIN ISO 1133), 5 to 50 wt. % of tackifier resins with a softening point of 80 to 140° C., 0 to 15 wt. % of waxes with a melting point of 120 to 170° C., 0.1 to 20 wt. % of additives and auxiliaries, the adhesive having a viscosity of 25,000 mPa·s to 250,000 mPa·s, measured at a temperature of 170 to 190° C.