Process for the preparation of flame resistant, elastic...

Details Process for the preparation of flame resistant, elastic... Process for the preparation of flame resistant, elastic...

C - Chemistry, Metallurgy

08

G

403/14

C08G 18/10 (2006.01) C08G 18/18 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08K 5/3492 (2006.01)

Patent

CA 2006698

PROCESS FOR THE PREPARATION OF FLAME RESISTANT ELASTIC POLYURETHANE FLEXIBLE FOAMS WHILE USING AT LEAST ONE POLYOXYALKYLENE POLYAMINE AND MELAMINE ABSTRACT OF DISCLOSURE The present invention deals with a process for the preparation of flame resistant elastic polyurethane flexible foams, comprising reacting: a) organic polyisocyanates and/or modified organic polyisocyanates with; b) higher molecular weight compounds having at least 2 reactive hydrogen atoms; c) optionally lower molecular weight chain extending agents; in the presence of d) catalysts; e) blowing agents; f) flame retardants; as well as with or without g) auxiliaries and/or additives; whereby as starting component (b) a mixture having an average functionality of 2 to 4 and an average molecular weight of 2200 to 8000 is used which preferably comprises bi) 40 to 94 parts by weight of at least one polyoxyalkylene polyol having a functionality of 2 -49- to 4 and an average molecular weight of 250 to 8000; bii) 3 to 25 parts by weight of at least one polymer modified polyoxyalkylene polyol having an average functionality of 2 to 4 and an average molecular weight of 1200 to 8000 selected from the group consisting of graft polyoxyalkylene polyols and polyurethane polyalkylene polyols containing in bonded form polyurea groups, polyhydrazide groups and/or tertiary amino groups; biii) 3 to 25 parts by weight of at least one polyoxyalkylene polyamine having a functionality of 2 to 4 and an average molecular weight of 1800 to 8000; and using melamine or mixtures of melamine and other flame retardants as flame retardant (f). -50-

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