Bayer Aktiengesellschaft

Erwin Hoffmann

Werner Dietrich

Kurt Krippl

Karl J Kraft

Kuno Wagner

Klaus Schulte

Manfred Kapps

Rolf Wiedermann

Karl D Kreuer

Hans-Dieter Pfeil

Frank Redmer

Karlheinz Andres

Gerd Gabrysch

Rolf Bock

This invention relates to a process for the preparation of polyurethane foams by the reaction of a foamable reaction mixture. A liquid blowing agent is added to either the isocyanate or the polyol prior to mixing of the components. An inert gas is dispersed in the component which contains the blowing agent and the gas charged component is immediately and continuously mixed with the other component, at the same time keeping it at least under the pressure required for charging it with gas until mixing has been completed, and leaving the resulting reaction mixture to foam up. The key to the present invention is in the small amount of gas charging.

Process for the preparation of polyurethane foams

The present invention is directed to an apparatus for applying a foam-forming flowable reaction mixture onto a substrate comprising an applicator tube connected to a mixer, said tube being provided with outlet openings and extending transversely over the substrate, further characterized in that the applicator tube is connected to a vibrating means.

Apparatus for applying a foam-forming flowable reaction mixture to a

This invention relates to a process and a laminator for the continuous production of laminates of foam with facings. An upper facing and a lower facing and a web of meshwork are introduced into the foaming space of a laminator and a fluid reaction mixture is spread over the lower facing before it runs into the foaming space. The reaction mixture penetrates the web of meshwork as it foams up on its journey through the foaming space and becomes bonded to the facings.

Process and laminator for the continuous production of laminates of foam

The invention relates to equipment for the continuous production of foam boards, which may be laminated between facings, from a liquid foamable reaction mixture. The apparatus broadly comprises a conveyor, a foam mixture application device located at or near one end of the conveyor and a transverse foam mixture distribution device located downstream of said application device and above said conveyor, the space between said distribution device and said conveyor being adjustable.

Equipment for the continuous production of foam boards

The invention relates to equipment for the continuous production of foam boards, which may be laminated between facings, from a liquid foamable reaction mixture. The apparatus broadly comprises

The present invention relates to equipment for the continuous production of foam boards, and particularly rigid foam boards, which may be laminated between facings. The apparatus broadly comprises a conveyor, which at the pouring end is equipped with an inclined table and a transverse distribution device, and a foam mixture application device provided above the table.

The instant invention relates to a process for the production of flame-resistant, hard foams which contain urethane groups from polyisocyanates, active-hydrogen containing compounds, water and/or organic blowing agents, and flame-retarding agents, the improvement wherein the flame-retarding agent used is a mixture of (a) an addition compound of (1) a mono-alcohol, a polyalcohol, or mixtures thereof, and (2) a lactam, and (b) a phosphorous containing acid or acid ester.

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Leverkusen, Germany

Erwin Hoffmann