C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 9/547 (2006.01) C07F 9/6571 (2006.01) C08K 5/5377 (2006.01)
Patent
CA 2086616
Novel 6-aryl-6H-dibenzo[c,e][1,2]oxaphosphorines, a process for their preparation, and their use for stabi- lizing plastics, in particular polyolefin molding compositions A process for the preparation of a dibenzo[c,e][1,2]- oxaphosphorine of the formula I (I) Image where n = 1 or 2 and in which R1, as a monovalent radical, is a phenyl radical, which may carry 1 to 3 substituents, or a naphthyl radical, which may carry 1 to 5 substi- tuents, the substituents being identical or different nonaromatic hydrocarbon, alkoxy, alkylthio or dialkyl- amino radicals, in each case having 1 to 8 carbon atoms, aryl or aryloxy, in each case having 6 to 10 carbon atoms, or halogen having an atomic number of from 9 to 35, or, as a divalent radical, is a phenylene or biphenylene radical which is unsubstituted or substituted by up to 4 nonaromatic hydrocarbon radicals having 1 to 8 carbon atoms, or is a naphthylene radical which is unsubstituted or carries 1 to 4 nonaromatic hydrocarbon radicals having 1 to 8 carbon atoms as substituents, which comprises, in a first step, reacting a hydrocarbon halide R1-(Hal)n in which R1 is as defined above, n = 1 or 2, and the halogen has an atomic weight of at least 35, under Grignard conditions with an at least stoichiometric amount of magnesium to give the corresponding Grignard compounds R1(MgHal)n, and reacting the latter, in a second step, with 6-chloro-6H-dibenzo[c,e][1,2]oxaphosphorine, forming the compounds of the formula I. The invention furthermore relates to a plastic molding composition, in particular a polyolefin molding composi- tion, which contains compounds of the formula I. The molding composition has improved properties compared with molding compositions containing oxaphosphorines prepared in accordance with the prior art.
Bohshar Manfred
Kleiner Hans-Jerg
Pfahler Gerhard
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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