Aluminum hydroxide
AssigneeAlbemarle Corporation
InventorsRene Gabriel Erich Herbiet, Norbert Wilhelm Puetz, Volker Ernst Willi Keller, Winfried Toedt
Life of this patent
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Abstract
Aluminum hydroxide flame-retardants and their use.
Claims34
ATH particles having a median pore radius (“r50”) in the range of from about 0.09 to about 0.33 μm and a BET, as determined by DIN-66132, in the range of from about 1 to 15 m2/g.
ATH particles having:
- a) a BET specific surface area of from about 3 to about 6 m2/g;
- and
- a maximum specific pore volume of from about 390 to about 480 mm3/g;
- or
- b) a BET specific surface area of from about 6 to about 9 m2/g;
- and
- a maximum specific pore volume of from about 400 to about 600 mm3/g;
- or
- c) a BET specific surface area of from about 9 to about 15 m2/g;
- and
- a maximum specific pore volume of from about 300 to about 700 mm3/g.
A flame retarded polymer formulation comprising at least one synthetic resin and in the range of from about 5 wt % to about 90 wt % ATH particles having
- a) a median pore radius in the range of from about 0.09 to about 0.33 μm;
- or
- b) a BET specific surface area of from about 3 to about 6 m2/g;
- and
- a maximum specific pore volume of from about 390 to about 480 mm3/g;
- or
- c) a BET specific surface area of from about 6 to about 9 m2/g;
- and
- a maximum specific pore volume of from about 400 to about 600 mm3/g;
- or
- d) a BET specific surface area of from about 9 to about 15 m2/g;
- and
- a maximum specific pore volume of from about 300 to about 700 mm3/g.
ATH particles having an r50 in the range of from about 0.2 to about 0.3 μm;
- in the range of from about 0.185 to about 0.25 μm;
- in the range of from about 0.09 to about 0.21 μm;
- or in the range of from about 0.09 to about 0.165 μm.
ATH particles having an r50 in the range of from about 0.09 to about 0.33 μm and a Vmax in the range of from about 300 to about 700 mm3/g.
Dependencies are inferred from the claim text.