Polyether polyols based on aromatic diamines and polyamines,...

Details Polyether polyols based on aromatic diamines and polyamines,... Polyether polyols based on aromatic diamines and polyamines,...

C - Chemistry, Metallurgy

08

G

402/278, 260/597

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

Patent

CA 1337357

The present invention relates to polyether polyols having OH numbers of about 300 to 630 obtained by sequentially reacting 2,4- and/or 2,6-tolylenediamine or mixtures of 2,4- and/or 2,6-tolylenediamine and one or more other aromatic amines with from about 1 to 2.5 moles of ethylene oxide for each NH2 group, and then with from about 0.5 to 5 moles of propylene oxide for each NH2 group, wherein said polyether polyols contain secondary amino groups comprising from about 2 to 20% of the isocyanate-reactive groups in said polyols and a free aromatic amine content of less than about 0.2% by weight. The present invention further relates to a process for preparing the polyether polyols of the invention, as well as to a method of using the polyether polyols for the preparation of polyurethane plastics.

607996

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