Preparation of polyether polyols containing aromatics

Details Preparation of polyether polyols containing aromatics Preparation of polyether polyols containing aromatics

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2178576

In a process for preparing polyether polyols containing aromatics by molecular addition of alkylene oxides to H-functional initiators at from 70°C to 135°C and pressures of from 0.1 MPa to 1.0 MPa, the alkoxylation is carried out using at least one initiator comprising at least 95% by weight of 2,3 and 3,4 isomers of tolylenediamine, from 0.5 to 4% by weight of 2,4 and 2,6 isomers of tolylenediamine and from 0.1 to 1.5% by weight of more volatile fractions from tolylenediamine production. The polyether of a polyol mixture for producing rigid polyurethane foams.

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