Hoechst Aktiengesellschaft

Hoechst Aktiengesellschaft Ag

Hoechst Aktiengsellschaft

Manfred Kuechler

Guenter Reinhard

Gerhard Grolig

Heinz Schmelzer

Peter Boening

Bernd Mucha

Modified bitumens, processes for their preparation, their use and solubilizing agents for plasticized polyvinyl butyral in bitumen. Preparation of modified bitumens having improved elasticity properties and an improved low-temperature flexibility by homogeneous mixing of plasticized polyvinyl butyral (PVB) into molten bitumen at 150.degree. to 300.degree. C., simultaneously using mono-, oligo- or polyalkylene glycol dialkyl ethers as solubilizing agents, if appropriate in combination with polystyrene as solubilizing co-component. Process for the preparation of the modified bitumens and possible uses thereof in industrial fields in which bitumens elasticized by conventional methods have hitherto been employed or required.

Modified bitumens, processes for their preparation, their use and

Production or multilayer laminated films which can be subjected to thermoplastic shaping and have an improved gas barrier action, consisting of at least one gas barrier film based on highly hydrolyzed, plasticizer-containing polyvinyl alcohol with, on one side or both sides, covering films of plastic which are insoluble in water, impermeable to water and water vapor and if appropriate insoluble in organic solvents and which are laminated to the gas barrier film over the entire surface by means of special adhesive layers which have pressure-sensitive adhesive properties. The adhesive layers consist of copolymers having a glass transition temperature T.sub.G in the range from -50.degree. to -10.degree. C. The gas barrier film can be produced by extrusion blow molding. The blown film bubble is cut open and coated, at room temperature as a flat film, with the adhesive layer on both sides via applicator rolls, dried and deshrunk by conditioning. The resulting self-adhesive gas barrier film is then laminated with covering films of plastic by means of laminating rolls or on a calender to give a multilayer film laminate which is practically impermeable to water and gas and if appropriate solvent-tight. Use of the multilayer laminated films for water- and gas-tight, in particular oxygen-tight, water vapor-tight, aroma-tight and if appropriate solvent-tight packaging or wrapping of various products.

Multilayer laminated film having an improved gas barrier action

Holt melt adhesive compositions having longer pot lives and comprising adhesive thermoplastic compositions having high cohesion and low flowability based on copolymers A) composed of ethylenically unsaturated monomers containing chelating metal compounds B) and, if desired, other conventional additives C), these hot melt adhesive compositions additionally containing an alkylphenolic resin or an arylphenolic resin in amounts of up to 20% by weight, relative to copolymer A), as crosslinking regulator in order to extend the pot life and to improve their processibility like a thermoplastic, and processes for preparing hot melt adhesive compositions by mixing the starting components.

Hot melt adhesives having improved pot lives and processes for their

A process for producing laminated safety glass is disclosed, comprising depositing a film which comprises at least one function layer on a plastic sheet, inserting the sheet between a plurality of further layers, such as two polyvinylbutyral sheets which are in turn enclosed by glass panes, such that the plastic sheet projects beyond the edges of the other layers, clamping the plastic sheet along its projecting sections, and laminating the layers. A clamping device for performing the process and a laminated safety glass produced by the process are also disclosed.

Process and device for producing laminated safety glass and laminated

Hot melt adhesive compositions having longer pot lives and comprising adhesive thermoplastic compositions having high cohesion and low flowability based on copolymers A) composed of ethylenically unsaturated monomers containing chelating metal compounds B) and, if desired, other conventional additives C), these hot melt adhesive compositions additionally containing an alkylphenolic resin or an arylphenolic resin in amounts of up to 20% by weight, relative to copolymer A), as crosslinking regulator in order to extend the pot life and to improve their processibility like a thermoplastic, and processes for preparing hot melt adhesive compositions by mixing the starting components.

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Oberursel, Germany

Manfred Kuechler