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US 6,270,560 B1Granted
Flameproof polymer moulding material
AssigneeTicona LLC
InventorsHans-Jerg Kleiner, Winfried Budzinsky
Life of this patent
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Abstract
Salt mixtures made from aluminum phosphinates, aluminum hydroxide and/or aluminum phosphonates and/or aluminum phosphates are thermally stable and are suitable as flame retardants for polymeric molding compositions, in particular for polyesters and polyamides. The use of these salt mixtures is more effective and more cost-effective than the use of aluminum phosphinates alone.
Claims25
A flame-retardant molding composition, which comprises the following components
- a) a polymer,
- b) an aluminum phosphinate, polymer of the formula (I), an aluminum diphosphinate or a polymer of the formula (II):
- where R1 and R2, independently of each other, are C1-C6-alkyl, optionally linked to a ring, and
- R3 is C1-C10-alkylene, and
- c) aluminum phosphonate of the formula (III):
- where R4 is C1-C6-alkyl,
- R5 is C1-C3-alkyl,
- n is 0 or 1,
- x is 1 if n is 1, and
- x is 2 if n is 0.
7 more elements
A flame-retardant molding composition, which comprises
- a) a polymer selected from the group consisting of polyethylene, poly-butylene terephthalate and polyamide,
- b) an aluminum phosphinate, polymer of the formula (I), an aluminum diphosphinate or a polymer of the formula (II):
- where R1 and R2, independently of each other, are C1-C6-alkyl, optionally linked to a ring, and
- R3 is C1-C10-alkylene, and
- c) 5 to 35% by weight of aluminum hydroxide, based on the weight of the polymer.
2 more elements
Dependencies are inferred from the claim text.