Basf Aktiengesellschaft

Rohm Gmbh

Rohm Gmbh Chemische Fabrik

Roehm Gmbh Chemische Fabrik

Peter R Szigeti

Gerhard Heinz

Manfred Krieg

Eckhard M Koch

Hans Lorenz

Wolfgang Eberle

Friedrich Hanstein

Hermann Buchert

Klaus Hofmann

Uwe Jacobsen

Otto Diroll

Gunther Schreyer

Christa Weber

A transparent plastic pane for an aircraft canopy consisting essentially of a copolymer of methylmethacrylate and polyfunctional acrylates, wherein the content of methylmethacrylate is greater than about 95 wt. % and the content of polyfunctional acrylates is 0.5 to 5% of the copolymer, and which is obtained by cast polymerization, whereby the temperature for final polymerization is maintained at 110.degree. C. to 130.degree. C. for at least 5 hours.

Transparent plastic pane containing a copolymer of methylmethacrylate

Thermoplastically re-formable plastic sheets with flameproofing means, characterized by a core layer 1-10 mm thick comprised of polyether sulfone or a similar thermoplastic, which core material has a content of at least 0.5 wt. %, preferably at least 2 wt. %, of a flame-protective additive, such as boron trioxide; and said sheet or plate further characterized by outer layers, firmly adhering to and covering the two faces of the core layer, at least 0.05 mm thick and comprised of a thermoplastic having a lower proportional content of the flame-protective additives than the core layer; are particularly useful for interior structures in passenger conveyances, such as airplanes.

Plastic sheet or plate with flameproofing means

A polishing plate for polishing the surface of synthetic resins has a rigid disk and a compressible cover abutting a lower surface of the rigid disk. The rigid disk has an inlet opening formed centrally therein and a plurality of channels formed in the lower surface thereof. The cover has a plurality of layers including an upper layer of soft foam adjacent the lower surface of the rigid disk, a lower layer having a textile surface structure and which contacts a surface to be polished, and a middle layer which is permeable to liquid and interposed between the upper and lower layers. A method of polishing a surface has as its first step supplying a polishing agent to a central opening formed in a rigid disk. The polishing agent is then uniformly distributed to an upper portion of a cover which is adjacent a lower surface of the disk through a plurality of channels formed in the lower surface of the disk, the channels communicating with the central opening to allow the polishing agent to flow therethrough. Next, the polishing agent is supplied to a lower portion of the cover through a plurality of access openings formed in the cover and disposed below the channels. The polishing agent is then uniformly applied to the surface to be polished by permeation of the polishing agent through the lower portion of the cover.

Polishing plate and method for polishing surfaces

Growing community of inventors

Buettelborn, Germany

Peter R Szigeti