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US 2012/0083557 A1Published application
Sterically hindered amine stabilizers
AssigneeBASF SE
InventorKai-Uwe Schoening
Life of this patent
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Abstract
The instant invention pertains to hindered amine compounds having at least two nitrogen atoms with different basicity. One part is substituted on the N-atom by alkoxy moieties and the other part is substituted on the N-atom by a hydroxy-alkyl moiety. These materials 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.
Claims20
A compound of formula (I)
- wherein:
- G1, G2, G3 and G4 are independently alkyl groups having 1 to 4 carbon atoms, or G1 and G2, G3 and G4, or both, together are pentamethylene;
- R101 and R102 are independently hydrogen or C1-C8alkyl;
- Q is a group of formula (II), (III), (IV) or (V)
- R103 and R104 are independently —C3-C7cycloalkyl or C1-C18alkyl, which is unsubstituted or substituted with halogen, nitro or —C(O)H;
- R105 is ethyl or methyl;
- E1 is straight or branched chain C1-C24alkyl, C2-C18alkenyl, C2-C18alkinyl, C5-C12cycloalkyl, C5-C12cycloalkenyl, phenyl, naphthyl or C7-C15phenylalkyl which are optionally unsubstituted or substituted with 1 to 3 OH groups, or
- E1 is C2-C24alkyl which is substituted by NO2, POR′ or NHR′ wherein R′ is C1-C12alkyl;
- * indicates a point of attachment;
- and
- ** indicates a point of attachment to one or two organic residues comprising 1-500 carbon atoms and optionally 1-200 heteroatoms.
8 more elements
A process for preparing the compound of formula (I)
- the process comprising reacting a sterically hindered amine comprising the structural element of formula (VI)
- wherein:
- G1, G2, G3 and G4 are independently alkyl of 1 to 4 carbon atoms, or G1 and G2, G3 and G4, or both, together are pentamethylene;
- ** indicates a point of attachment to one or two organic residues comprising 1-500 carbon atoms and optionally 1-200 heteroatoms, with a compound of formula (VII)
- wherein:
- R101 and R102 are independently hydrogen or C1-C8alkyl;
- Q is a group of formula (II), (III), (IV) or (V)
- R103 and R104 are independently —C3-C7cycloalkyl or C1-C18alkyl, which is unsubstituted or substituted with halogen, nitro or —C(O)H;
- R105 is ethyl or methyl;
- E1 is straight or branched chain C1-C24alkyl, C2-C18alkenyl, C2-C18alkinyl, C5-C12cycloalkyl, C5-C12cycloalkenyl, phenyl, naphthyl or C7-C15phenylalkyl which are optionally unsubstituted or substituted by 1 to 3 OH groups;
- and
- * indicates the point of attachment,
- in the presence of a Lewis acid as catalyst.
10 more elements
Dependencies are inferred from the claim text.