Bayer Aktiengesellschaft

Wolfgang Beer

Rolf Dhein

Burkhard Kohler

Wolfgang Ebert

Dieter Freitag

Klaus Horn

Rolf Kuchenmeister

Ralf Dujardin

Jurgen Kirsch

Ernst Grigat

Karl Zabrocki

Kurt Findeisen

Ulrich R Grigo

Karsten-Josef Idel

Hans-Joachim Traenckner

Werner Nouvertne

Uwe Westeppe

Erhard Tresper

Peter Hohlein

Siegfried Anders

Hans-Ulrich Buschhaus

Lothar Fleiter

Peter Horlacher

Rolf Kiichenmeister

Ferdinand Senge

The present invention relates to thermoplastic foams in which .beta.-ketocarboxylic acids, .beta.-ketocarboxylic acid esters or tert.-butyl esters of organic acids are used as the foaming agents.

Recyclable thermoplastic foam with a high glass transition temperature II

A thermoplastic molding composition suitable for the preparation of foam is disclosed. The composition comprises a thermoplastic resinous component and a foaming agent which includes A) (i) 0.01 to 4.8% alumina hydrate (aluminum hydroxide) in combination with (ii) 0.01 to 4.8% of an acidic additive or B) 0.01 to 4.8% of the reaction product of said (i) and said (ii), the percentages being relative to the weight of the composition to be foamed. The invention is based on the finding that the foaming of the composition does not lead to any significant reduction in molecular weight of the resinous component or to troublesome discoloration of the foam, even during its re-extrusion.

Recyclable thermoplastics foam of high glass temperature

A method of foaming thermoplastic aromatic polycarbonates is disclosed. Accordingly, a polycarbonate resin is mixed with 0.01 to 10%, the percent being relative to the total weight of polycarbonate resin and polysaccharide, of a particular polysaccharide and the mixture then processed thermoplastically without the application of negative pressure in an extruder, at temperatures of 180.degree. C. to 320.degree. C., or in an injection molding machine, at temperatures of 190.degree. C. to 330.degree. C., to obtain foamed molded articles.

Method of foaming thermoplastic polycarbonate

The invention relates to a thermoplastic molding composition comprising

Thermoplastic molding compositions of a polysiloxane block

The present invention relates to a process for the production of compounds containing reversibly blocked and, optionally, free alcoholic hydroxyl groups, characterized in that organic compounds containing at least one alcoholic hydroxyl group, but otherwise being inert under the reaction conditions are reacted at 0.degree. to 140.degree. C. with N,N'-disubstituted 5-acylimino-imidazolidine diones. The present invention also relates to the use of these compounds for the production of polyurethanes.

Process for the production of blocked compounds optionally containing

A process for the preparation of resol resins by reacting bisphenol A with 1.2 to 1.8 moles of formaldehyde in the presence of n-butanol or isobutanol and in the presence of a tri-alkali metal phosphate as a catalyst, and their use, optionally combined with epoxy resins, for the preparation of deep-drawable, sterilizable and chemically resistant lacquer films.

Resol resins prepared using butanol and tri-alkali metal phosphate

An air-drying and oven-drying lacquer binder based on a copolymer having copolymerized units of

Air-drying and oven-drying acrylate lacquer binders

An alkyd resin stoving lacquer with decreased loss of reactive diluent yields outstandingly hard coatings if a reactive diluent mixture comprising a lactam and a hydroxyl compound is used.

Stoving lacquers containing reactive diluents

A process for the preparation of multinuclear phenols alkylated in the nucleus, wherein bisphenol A is reacted with a phenyl alkenyl compound in the presence of a catalytic quantity of aluminium phenolate and resols obtained from said alkylated phenols.

Process for the preparation of multinuclear phenols which are alkylated

Non-aqueous polyester and alkyd resin stoving lacquers containing .epsilon.-caprolactam as a so-called reactive diluent with a high solids content and containing correspondingly small quantities of volatile solvents and yield excellently hard coatings which are not brittle.

Non-aqueous stoving lacquers containing .epsilon.-caprolactam as

Stoving lacquer systems having a high solids content contain a binder consisting of carboxyl and hydroxyl group-containing polyester or alkyd resin including an .epsilon.-caprolactone as a 'reactive diluent', and an aminoplast resin as a cross-linking agent.

Growing community of inventors

Krefeld, Germany

Wolfgang Beer