Melt adhesive based on metallocene catalyzed olefin-α-olefin copolymers

US8163833B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Thomas Moeller · Goldkronach, DE
• Volker Erb · Goldkronach, DE
• Marcus Heemann · Goldkronach, DE
• Dirk Kasper · Goldkronach, DE
• Eckhard Puerkner · Dressendorf, DE
• Bernhard Herlfterkamp · Bottrop, DE

Key dates

• Filing date: Mar 4, 2011
• Grant date: Apr 24, 2012
• Expiry date: Mar 4, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Melt adhesive containing 5 to 40 wt.-% of at least one ethylene-based copolymer and at least one C3 to C20-α-olefin obtained through metallocene-catalyzed polymerization, 10 to 65 wt.-% of at least one tackifying resin, 0 to 35 wt.-% of a plasticizer, 0.01 to 30 wt.-% additives and additional ingredients selected from stabilizers, adhesion promoters, fillers or pigments, waxes and/or other polymers, wherein the total should amount to 100%, characterized in that copolymer A is a block copolymer that exhibits a substantially even elastic behavior in the range of 0° C. to 25° C., measured as the ratio of the storage modulus E′ according to (E′0C−E′25C)/E′25C<1.5.