Method for the production of polyurethanes

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

Reexamination Certificate

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C252S182270, C521S119000, C521S120000, C521S123000, C521S124000, C521S125000, C521S128000, C521S130000, C521S174000, C524S706000, C524S729000, C524S777000, C524S778000, C524S787000, C524S788000, C524S796000, C528S048000, C528S051000, C528S055000, C528S056000, C528S057000, C528S076000

Reexamination Certificate

active

06906110

ABSTRACT:
In a process for producing polyurethanes by reacting at least one polyisocyanate with at least one compound containing at least two hydrogen atoms which are reactive toward isocyanate groups, the compound having at least two active hydrogen atoms which is used is at least one polyether alcohol prepared by addition of alkylene oxides onto H-functional initiator substances by means of multimetal cyanide catalysis and the reaction is carried out in the presence of at least one metal salt.

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