Bayer Aktiengesellschaft

Robert Zollner

Jan Mazanek

Johannes Blahak

Wolfgang Henning

Eberhard Konig

Norbert Eisen

Peter Seifert

Roland Gipp

Reinhold Dederichs

Uwe F Gronemeier

Kuuno Wagner

Refrigeration units having internal parts containing a rigid polyurethane foam formed without the use of perhalogenated fluoro-chlorohydrocarbons are produced by applying a coating to the internal walls of the part in which back-foaming will take place, pouring a foam forming reaction mixture into the cavity of the part in which the internal walls have been coated and allowing the foam to form and set. The coating applied to the internal walls of the part in which back foaming is to be carried out is selected from one-component chemically cross-linking lacquers, two-component chemically cross-linking lacquers and lacquers based on aqueous polyurethane dispersions. The foam forming mixture generally includes a polyisocyanate, a polyisocyanate-reactive compound and a blowing agent. The blowing agent must include a partially halogenated hydrocarbon having at least one carbon-hydrogen bond and a boiling point in the range of from about -50.degree. to about 50.degree. C.

Process for the production of back foamed internal parts for

The preparation and use of polyurethane-based hot melt adhesives which are cross-linked under the influence of heat comprising reacting

Process for the preparation of adhesives and their use for the formation

Novel, finely divided, redispersible dispersions of high melting polyesters in low melting polyhydroxyl compounds are disclosed. Disclosed also is a process for their preparation and their use as polyol components containing fillers in the production of cellular or non-cellular polyurethanes.

Dispersions of high melting polyesters in polyhydroxyl compounds, a

Growing community of inventors

Leverkusen, Germany

Robert Zollner