Basf Aktiengesellschaft

Basf Se Corporation

Werner Schmiade

Udo Rotermund

Holger Seifert

Renate Hempel

Bernhard Naber

Michael Gassan

Thermally stable rigid foams based on isocyanate and having low brittleness and low thermal conductivity

A process for producing pipes illustrated with foams comprises &lsqb;a&rsqb; providing, between an inner carrier pipe and an outer pipe arranged parallel thereto, a holder which is provided with at least one aperture and is mounted so that it can be moved axially and positions the carrier pipe in the outer pipe and &lsqb;b&rsqb; introducing into the vacant space between the two pipes, via the aperture (s) in the holder, a mixture for the preparation of foams, where &lsqb;b1)&rsqb; during the introduction of the mixture, the holder moves in an axial direction with respect to the outer pipe and the carrier pipe, then &lsqb;c&rsqb; after the mixture is charged, it is reacted to give the foam and &lsqb;d)&rsqb; the holder and, if desired, the outer pipe are removed.

Production of pipes insulated with foams

In a process for producing rigid polyurethane foams by reacting

Production of rigid polyurethane foams

A process for producing pipes insulated with foams comprises providing, between an inner carrier pipe and an outer pipe arranged parallel thereto, a holder which is provided with at least one aperture and is mounted so that it can be moved axially and positions the carrier pipe in the outer pipe and introducing into the vacant space between the two pipes, via the aperture(s) in the holder, a mixture for the preparation of foams, where during the introduction of the mixture, the holder moves in an axial direction with respect to the outer pipe and the carrier pipe, then after the mixture is charged, it is reacted to give the foam and the holder and, if desired, the outer pipe are removed.

Growing community of inventors

Lembruch, Germany

Werner Schmiade