Henkel Kommanditgesellschaft Auf Aktien

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Henkel Ag & Company, Kgaa

Ingolf Scheffler

Michael Krebs

Juergen Wichelhaus

Christoph Lohr

Hans-Peter Kohlstadt

Yingjie Li

Gerald Petry

Andreas Brenger

Bettina Becker

Hanns R Misiak

Hartmut Primke

Andrew Nixon

Liane Meuten

Michael Rudolph

Hanns Roland Misiak

Polyamide hot-melt adhesives based on the reaction products of polymeric fatty acids, C-Cmonocarboxylic acids, C-Cdicarboxylic acids and diamines which do not contain any water-extractable, environmentally toxic constituents, which are suitable for sealing cavities in soils, in rock formations, building structures and/or walls, in particular for sealing tunnels, galleries, shafts, channels or caverns, to protect against the penetration of water or the penetration of liquids or gases which contain hazardous substances.

Melt-adhesives for sealing off rocks or building materials

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

Hot-melt adhesive in particulate form

The present invention relates to compositions comprising reaction products of a polyisocyanate with a polyester block copolymer and a process for the preparation thereof. These are suitable as a moisture-curing hot melt adhesive. The hot melt adhesive composition may optionally also comprise a reaction product of a polyisocyanate with a polyester polyol and/or a reaction product of a polyisocyanate with a polyether polyol. Such polyurethane hot melt adhesive compositions have good creep resistance and interfacial adhesion values on plastics and show very high strength values.

Hot melt polyurethane adhesive compositions based on polyester block copolymers

Organic compounds containing the structural element &mdash;N&boxH;C&mdash;S&mdash;S&mdash;C&boxH;N&mdash; are suitable in dilute solution as activators for the accelerated hardening of cyanoacrylate adhesives. As compared with the known accelerators, they have the following advantage: good accelerating action, but they nevertheless permit a long waiting time between application of the activator and application of the adhesive. In addition, they avoid spontaneous, merely superficial hardening.

Activator for cyanoacrylate adhesives

Hotmelt polyurethane adhesive compositions which are solid at room temperature and capable of being cured by moisture are obtained by combining the reaction product of a polyisocyanate and a low molecular weight polymer derived from ethylenically unsaturated monomers and containing active hydrogen groups such as hydroxyl with an isocyanate-containing polyurethane prepolymer derived from one or more polyols. The low molecular weight polymer component may, for example, be obtained by free radical polymerization of mixtures of unsaturated monocarboxylic acids, alkyl esters of unsaturated monocarboxylic acids, and/or hydroxyalkyl esters of unsaturated monocarboxylic acids.

Modified polyurethane hotmelt adhesive

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Neuss, Germany

Ingolf Scheffler