High thermal stability melamine octamolybdate and use thereof as a smoke suppressant in polymer compositions
AssigneeJ.M. Huber Corporation
InventorsYue Liu, Aleksey Isarov, David Dwayne Temples, David Stanley Reece, Mitchell Lee Pierce
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Abstract
Processes for producing melamine octamolybdates having high thermal stability include a step of reacting molybdenum trioxide and melamine in an acidic aqueous system at a pH of less than or equal to about 4 to form a slurry of the melamine octamolybdate. The resulting melamine octamolybdate can be characterized by a decomposition onset temperature (or a temperature at a weight loss of 1%, or a temperature at a weight loss of 2%) on a thermogravimetric analysis curve of greater than 300° C., and is useful in polymer compositions as a smoke suppressant.
Claims21
Melamine octamolybdate characterized by:
- a median particle size (d50) in a range from about 0.5 to about 20 μm;
- a temperature at a weight loss of 1% on a thermogravimetric analysis curve in a range from about 300° C. to about 500° C.;
- and
- a temperature at a weight loss of 2% on a thermogravimetric analysis curve in a range from about 300° C. to about 500° C.
A polymer composition comprising:
- (a) a polymer;
- and
- (b) a melamine octamolybdate characterized by:
- a median particle size (d50) in a range from about 0.5 to about 20 μm;
- a temperature at a weight loss of 1% on a thermogravimetric analysis curve in a range from about 300° C. to about 500° C.;
- and/or
- a temperature at a weight loss of 2% on a thermogravimetric analysis curve in a range from about 300° C. to about 500° C.
Dependencies are inferred from the claim text.