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US 2011/0237715 A1Published application
Flame retardant compositions of phosphinic acid salts and nitroxyl derivatives
AssigneeBASF SE
InventorRainer Xalter
Life of this patent
Estimating the term…
Abstract
The present invention relates to flame retardant polymer compositions which comprise mixtures of salts of phosphinic acids and 2,2,6,6-tetraalkylpiperidines. The mixtures are especially useful for the manufacture of flame retardant compositions based on thermoplastic polymers.
Claims12
A composition, which comprises
- a) A salt of a phosphinic acid as represented by the structural formulae
- in which
- one of R1 and R2 represents hydrogen or C1-C8alkyl;
- or both R1 and R2 represent C1-C8alkyl;
- and
- R3 represents C1-C10alkylene, C2-C10alkylene interrupted by phenylene, phenylene, (C1-C4alkyl)1-3-phenylene, or phenyl-C1-C4alkylene;
- b) A tetraalkylpiperidine or tetraalkylpiperazine derivative selected from the group that consists of 2,2,6,6-tetraalkylpiperidine-1-oxides, 1-hydroxy-2,2,6,6-tetraalkylpiperidines, 1-alkoxy-2,2,6,6-tetraalkylpiperidines, 1-acyloxy-2,2,6,6-piperidines, 1-hydroxy-2,2,6,6-tetraalkylpiperazines, 1-alkoxy-2,2,6,6-tetraalkylpiperazines, and 1-acyloxy-2,2,6,6-piperazines;
- and
- c) A polymer substrate.
6 more elements
A mixture, which comprises
- a) A salt of a phosphinic acid as represented by the structural formulae
- in which
- one of R1 and R2 represents hydrogen or C1-C8alkyl;
- or both R1 and R2 represent C1-C8alkyl;
- and
- R3 represents C1-C10alkylene, C2-C10alkylene interrupted by phenylene, phenylene, (C1-C4alkyl)1-3phenylene, or phenyl-C1-C4alkylene;
- b) A tetraalkylpiperidine derivative selected from the group that consists of 2,2,6,6-tetraalkylpiperidine-1-oxides, 1-hydroxy-2,2,6,6-tetraalkylpiperidines, 1-alkoxy-2,2,6,6-tetraalkylpiperidines and 1-acyloxy-2,2,6,6-piperidines.
4 more elements
Dependencies are inferred from the claim text.