Basf Se Corporation

A. Raymond Et Cie

A. Raybond Et Cie

Michel Awkal

Hermann Seyffer

Dieter Urban

Carmen-Elena Cimpeanu

Volker Schaedler

Thomas Breiner

Michel Bremont

Robert Feuerhake

Volker Schädler

Soumyajit Roy

Michel Brémont

A heat-activable powder adhesive composition for use in bonding a component to a surface such as glass is disclosed. The composition of the disclosed invention includes at least two polymers, at least one solid di- or poly-isocyanate in powder form, and a catalyst. Each of the two polymers has a melting point above 40&#xb0; C. The two polymers are selected from the group consisting of di-functional polymers and multi-functional polymers. The preferred method of preparing the composition of the disclosed invention includes first forming three parts, including a first melted part comprising the polymers, a second melted part comprising the polymers and a catalyst, and a third part comprising the isocyanate. Once cooled, each of the first and second parts forms solid blocks which are fragmented and sieved. The three dry parts are then brought together to form the adhesive powder of the disclosed invention. The adhesive powder can be pre-applied to the attachment surface of a component to be bonded. The composition does not require either a deactivating agent or a blocking agent for deactivating the isocyanate or the catalyst nor does it require either a deactivated isocyanate or a deactivated catalyst.

Adhesive polyurethane powder capable of being activated by heat

A description is given of a method of producing packaging, the packaging surface being coated with a polyelectrolyte complex, and the polyelectrolyte complex being composed of at least one first polymer and at least one second polymer, the first polymer being an anionic polymer and the second polymer being a cationic polymer. The packaging is distinguished by good fat barrier properties.

Method of producing packaging having fat barrier properties

A method and an apparatus are provided for the production of heat-activable adhesive pellets that can be formed into elements for holding an article to a surface such as a glass surface. The apparatus and method for the manufacture of the heat-activable pellets include the steps of introducing at least a first component comprising at least one difunctional polymer with at least one multifunctional polymer into an extruder, heating the first component, introducing a second component comprising isocyanate and a powder flow enhancer (such as fumed silica) at a point downstream of the introduction of the first component, combining the first and second components in the extruder to form a flowable compound, pelletizing the extruded compound exiting the extruder by cutting to form heat-activable adhesive pellets, and drying the pellets. In one embodiment of the disclosed invention a catalyst is applied to the pellets to form catalyst-coated heat-activable adhesive pellets. In another embodiment of the disclosed invention a catalyst is added into the extruder to form catalyst-containing heat-activable adhesive pellets.

System and method for manufacturing heat-activable adhesive pellets

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Saint Louis, France

Michel Awkal