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US 4,301,057 AGranted
Tris-(3-hydroxyalkyl) phosphine oxide flame retardant compositions
AssigneeFMC Corporation
InventorsDiza P. Braksmayer, Syed N. Hussain
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Abstract
Thermoplastic polyamide polymers such as nylon 6/6 are rendered fire retardant by the addition of an effective amount of a tris-(3-hydroxyalkyl) phosphine oxide such as tris-(3-hydroxypropyl) phosphine oxide.
Claims21
A thermoplastic glass filled polyamide polymer rendered flame retardant by having combined therewith an effective amount of a tris-(3-hyroxyalkyl) phosphine oxide having the formula:
- ##STR3## wherein R is any radical selected from the group consisting of hydrogen and methyl radicals.
A method of manufacturing a flame retardant glass filled polyamide polymer which comprises adding thereto an effective amount of a tris-(3-hyroxyalkyl) phosphine oxide having the formula:
- ##STR5## wherein R is any radical selected from the group consisting of hydrogen and methyl radicals and distributing the phosphine oxide throughout said polyamide polymer.
Dependencies are inferred from the claim text.