Henkel Ag & Company, Kgaa

Henkel Kommanditgesellschaft Auf Aktien

Evonik Roehm Gmbh

Henkel Ag&co. Hgaa

Evonik Rohm Gmbh

Uwe Franken

Michael Krebs

Hans-Georg Kinzelmann

Thomas Moeller

Andreas Ferencz

Yang Cao

Christoph Lohr

Hongxia Zhao

Johann Klein

Lars Zander

Sven Balk

Gerd Loehden

Olaf Lammerschop

Karin Jonscher

Xiao Han

Horst Beck

Holger Kautz

Claudia Meckel-Jonas

Adrian Brandt

Christiane Kunze

Alexander Kux

Volker Erb

Andreas Brenger

Stefanie Stapf

Sascha Poeller

Thomas Morgeneyer

Tim Welters

Thomas Möller

Felicitas Kolenda

Horst Hoffmann

Hartmut Primke

Manuel Schiel

Tanja Rossberg

Katja Brosa

Milan Sebestian

Gerd Löhden

Georg Kinzelmann

Kim Dana Kreiskoether

Keon Woo Lee

Christian Kremer

The present invention relates to a heat separable two-layer adhesive system, to a process of adhesive debonding using the adhesive system and to a heat separable bonded composite body. In particular, the present invention relates to a heat separable two-layer adhesive system comprising an adhesive layer having conductive particles.

Heat separable two-layer adhesive system and process of adhesive debonding using the same

The present invention lies in the field of 3D printing methods. In particular, the invention relates to 3D printing methods for the production of a 3D part in a layer-by-layer manner, wherein the printable composition is a pasty polyurethane composition comprising at least one polyisocyanate resin, at least one monomer and/or prepolymer that is polymerizable by exposure to radiation and at least one photoinitiator, wherein the pasty polyurethane composition has a viscosity factor (1.5/15) of at least 2 at application temperature.

Dual cure polyurethane formulations for 3D printing applications

The present invention refers to a process for the production of hot melt adhesives having a low emission of monomeric isocyanates upon heating wherein in a first step a polyurethane prepolymer is generated which is subsequently reacted with a chain extender. Further, the present invention refers to hot melt adhesives obtained by the inventive process.

Process for the production of hot melt adhesives having a low emission of monomeric isocyanates

The present invention relates to a hot-melt adhesive composition comprising at least one polyester polyol based on Betulin and at least one NCO-terminated compound as well as a method for the production of a laminated article using the inventive hot-melt adhesive composition.

Hot-melt adhesive composition comprising bio-based polyester polyols

The present invention relates to a reactive polyurethane (PUR) hot-melt adhesive, in particular a moisture cross-linking 1K-PUR hot-melt adhesive, wherein the PUR adhesive contains neutralized hollow glass spheres as fillers. The invention also relates to the use of said adhesive for adhesively bonding substrates.

Reactive polyurethane hot melt adhesives containing fillers

The invention relates to a polyurethane (PU) reactive hot melt adhesive removable at elevated temperature as well as having a high bonding strength at room temperature.

Removable polyurethane hot melt adhesive and the use thereof

A reactive hot melt adhesive comprising a blend of a (meth)acrylate polymer, a polyurethane polymer containing (meth)acrylate groups and a polyurethane prepolymer containing NCO-groups wherein the content of low molecular weight (meth)acrylate urethanes is less than 1 wt % of the adhesive. The adhesive provides a fast and improved green strength during application.

UV-curing hot melt adhesive containing low content of oligomers

The present invention describes reaction products from 2,4'-diphenylmethane diisocyanate with a content of at least 95 wt. % of 2,4&#x2032; isomer with at least one polyether-polyol and/or polyalkylene glycol with a molecular weight of less than 1,000 and/or one crystalline or partly crystalline or vitreously amorphous polyester-polyol and optionally polyester-polyols and/or polyether-polyols which are liquid at room temperature and have molecular weights of greater than 1,000 can be converted into adhesive compositions which have a very low content of monomeric diisocyanate of less than 0.5, preferably less than 0.25 wt. %. Such hot melt adhesive compositions have a high melt stability and a low viscosity, in addition to the low content of monomeric diisocyanate.

Reactive polyurethane compositions with a low residual monomer content

Cross-linkable foamable composition with low content of monomeric isocyanates, containing a pre-polymer of polyester diols and/or polyether dials reacted i) with asymmetric aromatic diisocyanates to form a reaction product with OH and NCO groups, ii) subsequent addition of and reaction with symmetric aromatic diisocyanate in a quantity at least equivalent to the available OH-groups, 0.1 to 30 wt % additives, at least one propellant, wherein the polyols have a molar mass (MN) of less than 5000 g/mol, and the reaction product has a content of less than 0.1 wt % monomeric asymmetric isocyanate and less than 2 wt % monomeric symmetric isocyanate.

Low-monomer polyurethane foams

Polyether block copolymers of the general structure B-(A-OH)are described, where n is greater than or equal to 2 and blocks A are made up of polyoxypropylene units and the central block B of polyoxytetramethylene, polyoxyethylene, polybutadiene, polyisoprene, polyacrylate, polymethacrylate, polyamide, polyurethane, or polyester units. These polyether block copolymers are suitable for the manufacture of compositions that serve as the basis for preparations for use as a one-component moisture-hardening or two-component adhesive or sealant, for assembly bonding, for areal bonding, and/or for coating, as a reactive melt adhesive or as a laminating adhesive.

Polyether block copolymers and compositions that can be obtained therefrom

A solvent-free moisture-curing polyurethane hot-melt adhesive composition, in which the adhesive comprises the following components: 20 to 85 wt % of a polyurethane prepolymer with free isocyanate groups produced from at least one polyol from the group of polyether polyols, polyester polyols, polyalkylene polyols and mixtures thereof with an excess of at least one polyisocyanate, the prepolymer having a monomeric diisocyanate content of below 1 wt %, 4 to 40 wt % of at least one acrylate copolymer with a molecular weight of below 60,000 g/mol, 3 to 35 wt % of a thermoplastic polyester with a number-average molecular weight (MN) of below 6000 g/mol, which comprises fewer than 1.4 NCO-reactive groups, and 0 to 25 wt % of at least one additive from the group of catalysts, resins, plasticizers, fillers, pigments, stabilizers or adhesion promoters, the sum of the constituents being equal to 100 wt %.

Polyurethane hot-melt adhesive produced from polyacrylates and polyesters

A reactive melt adhesive containing 30 to 70% of at least one prepolymer having at least two isocyanate groups having a molecular weight below 6000 g/mol, manufactured from polyether polyols and/or polyester polyols reacted with a molar excess of diisocyanates, the prepolymer containing less than 1% monomeric diisocyanate; 30 to 70 wt % of a thermoplastic polyester having a number-average molecular weight (M) below 6000 g/mol, which comprises fewer than 1.4 groups reactive with NCO; and up to 30 wt % additives from the group of the catalysts, resins, plasticizers, fillers, pigments, stabilizers, or adhesion promoters.

Polyurethane hot-melt adhesive with reduced viscosity

The invention relates to a process for preparing CABAC or ACBCA pentablock copolymers based on (meth)acrylate with an OH functionalization of the A blocks.

Method for preparation of penta-block copolymers with oh-functionalized blocks based on (meth)acrylate

One-component moisture-curing hot melt adhesive compositions based on reaction products from di- or polyisocyanates and polyether-polyols, crystalline or partly crystalline polyester-polyols and low molecular weight polymers from olefinically unsaturated monomers and optionally hydroxylated tackifying resins are suitable for high-strength and ageing-resistant gluing of profiles of plastics to one- or multilayer acrylate films.

Reactive hot melt adhesive

A process for the production of a polyurethane hot-melt adhesive based on grafted polyester-polyether block copolymers with grafted-on hydroxyl groups and the reaction thereof with a stoichiometric excess of a polyisocyanate and the optional mixing thereof with further pre-polymers based on polyether polyols and polyester polyols is disclosed. By this process, the polyester-polyether block copolymers are firmly incorporated into the polyurethane matrix on curing, so that they are migration-proof. Highly-elastic hot-melt adhesives result, which, with optional foaming, are also suitable for the production of elastic seals.

Highly elastic polyurethane hot-melt adhesives

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Dormagen, Germany

Uwe Franken