A new reaction for the conversion of stable nitroxide radicals into the corresponding N-alkoxyamines by means of a copper-catalyzed ketone-hydrogen peroxide reaction is reported.
[EN] PHOSPHO-SUBSTITUTED ALKOXYAMINE COMPOUNDS<br/>[FR] COMPOSÉS ALCOXYAMINE SUBSTITUÉS PAR DES GROUPES PHOSPHO
申请人:BASF SE
公开号:WO2011086114A1
公开(公告)日:2011-07-21
The invention relates to compounds of the group of so-called sterically hindered amines (HALS) which are substituted by phospho groups. The invention also relates to flame retardant compositions wherein these compounds are added to the polymer substrate.
The present invention relates to an intermediate of the formula
, wherein R1 is linear C1-C7alkyl, and
to a process for the preparation of said intermediate.
Further, the present invention relates to a compound of the formula (A) which can be prepared by using said intermediate, and to an organic material stabilized with said compound.
wherein
X is a group of the formula (A-1) or (A-2)
and the radicals R1 are independently of one another linear C1-C7alkyl;
Y1 is C10-C20alkyl; and
Z1 is a direct bond or C2-C12alkylene uninterrupted or interrupted by sulfur.
Process for the preparation of sterically hindered nitroxyl ethers
申请人:Schöning Kai-Uwe
公开号:US20100249401A1
公开(公告)日:2010-09-30
The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.
The instant invention pertains to sterically hindered amine Night stabilizers (HALS) with low basicity at the nitrogen atom and high thermal stability. They are characterized by their spiro- substitution in the 4-position of the tetramethylpiperidine dine ring (Spiro-NOR-HALS). These compounds are particularly effective in stabilizing polymers, especially thermoplastic polyolefins, against the deleterious effects of oxidative, thermal and actinic radiation. The compounds are also particularly effective in stabilizing acid catalyzed and ambient cured coatings systems. They are particularly useful when high processing temperatures are additional required.