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US 9,938,381 B2Granted
Flame retardant polyamide compositions
AssigneeFrx Polymers, Inc.
InventorsDieter Freitag, Pin Go, Youmi Jeong, Lawino Kagumba
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Abstract
Predominately amino terminated phosphonamide oligomers and their use as flame retardant additives in polyamides and copolyamides without detracting from melt processability are described herein. Other important properties such as strength, modulus, dyeing and thermal stability are maintained.
Claims2
A phosphonamide oligomer comprising a compound of Formula II:
- wherein
- each of R1, R2, R3, R4, and R5 is individually a C1 to C20 alkyl or, optionally substituted, aryl group;
- each of X1, X2, X3, and X4 is individually, an aromatic, cycloalkyl, or aliphatic group;
- n and m are an integer of from 0 to about 20;
- and
- each Z is, independently:
3 more elements
Dependencies are inferred from the claim text.