Process for the preparation of secondary monomethylalkyl amines
申请人:Akzo Nobel N.V.
公开号:EP0497407A2
公开(公告)日:1992-08-05
A process for the preparation of a highly selective amount of secondary monomethylalkyl amine, said process comprising reacting, at elevated temperature and pressure, a hexahydrotriazine compound in the liquid state with hydrogen in the presence of a catalyst material having at least one catalytically active metal, said hexahydrotriazine compound having the formula
wherein R₁, R₂, and R₃ are, independently, straight or branched, saturated or unsaturated, linear or cyclic hydrocarbon groups or straight or branched, saturated or unsaturated, linear or cyclic hydrocarbon groups wherein one or more CH₂ groups are replaced by an oxygen atom or a tertiary amine group, provided that any unsaturated group is separated from nitrogen in the hexahydrotriazine ring by at least one carbon atom, any said oxygen atom is enclosed by two carbon groups, and any said oxygen atoms and any said amine groups are separated from other oxygen atoms and other amine groups and from said nitrogen in the hexahydrotriazine ring by at least two carbon atoms.
The invention relates to stabilized thermoplastic polymers, in particular polyolefin films. The stabilizing composition contains a tertiary amine with a molecular weight greater than 400 g/mol, a UV-absorber and/or a sterically hindered amine light stabilizer (HALS). Further aspects of the invention are a process for stabilizing thermoplastic polymers and the use of the above composition for stabilizing thermoplastic polymers.