Firma Carl Freudenberg

Dieter Bischoff

Holger Buchwald

Werner Schafer

Armando Favorite

This application discloses a sealing floor covering useful in moist rooms and outdoor areas, comprising an undercoat and an outermost surface covering bonded to the undercoat. The undercoat is comprised of at least three bonded-together layers of a vulcanizable elastomeric material and at least one intermediate layer of the undercoat contains a vulcanization accelerator.

Floor covering and method for installing a floor covering

A weather-resistant covering is made of three superimposed sheets of vulcanizable material such as ethylene-propylene copolymers, e.g. ethylene-propylene-diene terpolymer. The inner layer contains a vulcanization accelerator and advantageously the outer layers do not. An additional inner layer such as a non-woven textile fabric can be provided to increase strength and dimensional stability. A roof can be covered by placing a plurality of strips of such covering side-by-side with slight overlap, welding them together into impervious seams by application of a volatile solvent or swelling agent for the outer layers.

Weather-resistant vulcanizable covering

A high-temperature-resistant nonwoven fabric comprising synthetic fibers bonded to one another, said fibers comprising at least one polyaryl amide, polyaryl imide, polyaryl ester or polyaryl anhydride, said fibers being resistant to temperatures up to about 350.degree. C and being resistant to prolonged exposure to a temperature of at least 200.degree. C, is produced by bonding a suitable nonwoven web employing a solution containing a swelling agent and/or a bonding agent for the fiber. If a bonding agent is present, it is of substantially the same composition as the fiber and is precipitated or coagulated by treating the impregnated web with a liquid miscible with the solvent of the solution but which is a non-solvent for the bonding agent. The fabric is washed and dried and then preferably calendered at high temperature so that all the polymeric material is crystallized.

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Furth, Germany

Dieter Bischoff