Henkel Kommanditgesellschaft Auf Aktien

Henkel Ag & Company, Kgaa

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Gerald Petry

Michael Krebs

Eckhard Puerkner

Michael Kik

Juergen Wichelhaus

Marcus Heemann

Robert Magunia

Hans-Peter Kohlstadt

Sebastian Kostyra

David Duckworth

Ingolf Scheffler

Lutz Huesemann

Eckhard Pürkner

Joachim Holze

Hartmut Primke

Andrew Nixon

Rainer Vogel

Michael Czmok

Stephen Hatfield

Gunther Kratz

Bernhard Toeritz

Milan Burgsmueller

Alfred Biehle

Riju Davis

Michael Rudolph

Milan BURGSMÜLLER

The invention relates to hot melt adhesives which are pressure sensitive adhesives whereby the adhesive is provided in a granulated form and is free-flowing and does not block during storage. Such pellets can be used as feed for automated feeder devices for the supply hot melt application systems.

Free-flowing pressure sensitive adhesives

The invention relates to a nontacky film-forming polymer composition (cover material), and tacky hot melt adhesives in the form of pellets which are coated with the polymer composition and producible by coextruding the hot melt adhesive and the cover material. The film-forming composition comprises 5 to 40% by weight of at least one Fischer-Tropsch wax having a melting point of &#x3e;95&#xb0; C. and 30 to 70% by weight of at least one metallocene-catalyzed polyolefin having a softening point of &#x3e;95&#xb0; C. and a melt flow index (MFI) (230&#xb0; C., 2.16 kg) of &#x2264;1000 and &#x2265;300 g/10 minutes. The invention further relates to suitable uses for such hot melt adhesives, methods for their use, and products containing these adhesives.

Covering materials for adhesive hot-melt glues

A moisture-curing hot-melt-adhesive composition in granulate, tablet or powder form can be produced by

Hot-melt adhesive in particulate form

A hotmelt adhesive is provided in the form of a granulate comprising at least one compact outer layer (shell) made up of at least one component which is not pressure sensitive up to 45&deg; C. and which surrounds a core made up of other components of the hotmelt adhesive. The hotmelt adhesive granulates are free flowing even after storage at a high temperature under pressure.

Hot-melt-type adhesive in the form of a granulate

The invention relates to thermoplastic compositions that contain reactive isocyanate groups and that are suitable for use as desiccants for packaging moisture-sensitive goods, especially for polyurethane hotmelt adhesives that are cross-linked upon exposure to moisture. The compositions are formed by the reaction of hydroxy- or amino-containing polyols, including sugars, with an excess of polyisocyanates, and admixing the resulting product with polyurethane catalysts.

Thermoplastic desiccant

In the production of a strand-form hotmelt adhesive wrapped in a tubular film which is suitable for simultaneous melting with the hotmelt adhesive and which does not have any surface tackiness at normal storage temperatures, the heated liquid hotmelt adhesive is introduced into the cooled tubular film and the tube is subsequently cooled in a cooling bath. During introduction of the hotmelt adhesive, the shape of the tubular film is stabilized by providing an excess gas pressure and/or a guide inside the tube. The outside of the tube is cooled by a cooling liquid, the tubular film is brought into a substantially horizontal position after immersion in the cooling bath and is kept in that position in the cooling bath at least until the contents of the tubular film in proximity with said liquid hotmelt adhesive have at least partly solidified. Strands of any diameter and any length can readily be produced without significant effort in an economically and industrially useful manner.

Process for production of hotmelt adhesives

Growing community of inventors

Hueckelhoven, Germany

Gerald Petry