US 12,139,608 B2
Non-halogenated flame retardant polyamide compositions
Kimberly M. White, Pensacola, FL (US)
Assigned to Ascend Performance Materials Operations LLC, Houston, TX (US)
Filed by Ascend Performance Materials Operations LLC, Houston, TX (US)
Filed on Apr. 1, 2020, as Appl. No. 16/837,314.
Claims priority of provisional application 62/827,653, filed on Apr. 1, 2019.
Prior Publication US 2020/0308402 A1, Oct. 1, 2020
Int. Cl. C08L 77/00 (2006.01); C08K 3/04 (2006.01); C08K 3/38 (2006.01); C08K 5/00 (2006.01); C08K 5/49 (2006.01); C08K 5/56 (2006.01)
CPC C08L 77/00 (2013.01) [C08K 3/04 (2013.01); C08K 2003/387 (2013.01); C08K 5/0066 (2013.01); C08K 5/49 (2013.01); C08K 5/56 (2013.01)] 18 Claims
 
1. A flame retardant polyamide composition comprising:
polyamides consisting of polyamide 6,6 having a ratio of carboxylic acid end groups to amine end groups of greater than 1.8:1 and a PA-6 homopolymer, wherein the PA-6 homopolymer is present up to 20 wt. %, based on the total weight of the polyamide composition;
a non-halogenated flame retardant;
less than 0.29 wt. % of a first copper-containing heat stabilizer, wherein the first copper-containing heat stabilizer comprises a copper halide and an organohalo-phosphorus compound, based on the total weight of the polyamide composition;
wherein the polyamide composition comprises less than 900 ppm of bromine, and
wherein the polyamide composition retains 50% of its original tensile strength after heat aging for greater than 800 hours when heat aged at a temperature of 195° C. and measured at 23° C.