Bayer Materialscience Ag

Marcus Eichmann

Klaus Lorenz

Arnulf Werner

Hanno Brummer

Josef Sanders

Bernd Sojka

Verena Haverkamp

The present invention relates to a process for preparing polyether polyols by base-catalyzed addition of alkylene oxides (epoxides) onto starter compounds which are solid at room temperature and have Zerevitinov-active hydrogen atoms, a particular feature of which is that visually clear and/or homogeneous products are obtained even in the absence of solvents.

Process for preparing polyether polyols

The present invention relates to a process for solvent-free preparation of polyether polyols with blockwise polyether chain structure, based on starter compounds solid at room temperature.

The present invention provides polyols which can be obtained by a simple process. These polyols, unless explicitly specified, are to be understood to encompass both polyether polyols and polyether ester polyols. The invention further provides the simple process for the production of the polyols, and also, the production of polyurethanes comprising reacting a polyol according to the invention with a polyisocyanate.

Process for the preparation of polyols

The present invention relates to a process for the phosgenation of amines in the gas phase, in which a specific type of heat exchanger is used for vaporizing the amines.

Gas-phase phosgenation process

A process for the preparation of a polyol which includes reacting an amino-group-containing starter compound with an alkylene oxide in the presence of a catalyst to form a polyol, wherein the catalyst is based on a compound selected from the group consisting of alkali metal hydroxides, alkali, alkaline earth metal hydrides, alkaline earth metal carboxylates, and alkaline earth hydroxides, and wherein the catalyst is present in an amount of from 0.004 to 0.1 wt. % based on the amount of polyol; and neutralizing the polyol with from 0.75 to 1 mol of sulfuric acid per mol of catalyst used.

Growing community of inventors

Dusseldorf, Germany

Marcus Eichmann