C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 211/08 (2006.01) B22C 1/22 (2006.01) B22C 9/12 (2006.01) C08G 8/00 (2006.01) C08G 18/00 (2006.01)
Patent
CA 2268952
Dimethylpropylamine is provided. This new amine surprisingly has a significantly less offensive odor and is considerably less prone to be impregnated in or coat the skin and clothing than are other amines which are utilized to catalyze phenol formaldehyde and polyisocyanate resins during the production of sand cores in the "Cold Box Process". Dimethylpropylamine also cures phenol formaldehyde and polyisocyanate resins at a surprisingly rapid rate. Dimethylpropylamine is produced utilizing a reaction mixture which includes Dimethylamine and Propyl alcohol such that the molar ratio of Dimethylamine to Propyl alcohol is in the range of 0.07 to 0.5.
L'invention concerne une dyméthylpropylamine. Cette nouvelle amine a curieusement une odeur sensiblement moins désagréable et est nettement moins susceptible d'imprégner ou de se déposer sur la peau et les vêtements que les autres amines utilisées pour catalyser les résines de phénol-formaldéhyde et polyisocyanate pendant la production de noyaux en sable dans le processus de "moulage en boîte froide". La dyméthylpropylamine permet aussi la polymérisation de résines phénol-formaldéhyde et de polyisocyanate à une vitesse remarquablement élevée. On produit la dyméthylpropylamine en utilisant un mélange réactionnel qui inclut de la dyméthylamine et de l'alcool propylique dans une proportion molaire de dyméthylamine et d'alcool propylique allant de 0,07 à 0,5.
Brambila Rene Becerra
Hernandez German Maya
Brambila Rene Becerra
Hernandez German Maya
Petramin S.a. de C.v.
Smart & Biggar
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