US 12,312,466 B2
Polyamide formulations for improved noise vibration and harshness
Avelino Lima, Houston, TX (US); Jacob G. Ray, Houston, TX (US); Ted Wieczorek, Houston, TX (US); Kai Becker, Houston, TX (US); Bradley J. Sparks, Houston, TX (US); and Tariq Oweimreen, Houston, TX (US)
Assigned to Ascend Performance Materials Operations LLC, Houston, TX (US)
Filed by Ascend Performance Materials Operations LLC, Houston, TX (US)
Filed on May 12, 2021, as Appl. No. 17/318,754.
Claims priority of provisional application 63/119,201, filed on Nov. 30, 2020.
Claims priority of provisional application 63/045,009, filed on Jun. 26, 2020.
Claims priority of provisional application 63/024,872, filed on May 14, 2020.
Prior Publication US 2021/0355322 A1, Nov. 18, 2021
Int. Cl. C08L 77/06 (2006.01); B60G 21/055 (2006.01); B60K 5/12 (2006.01); B60K 17/00 (2006.01); F16F 1/36 (2006.01); F16M 13/02 (2006.01)
CPC C08L 77/06 (2013.01) [F16F 1/3605 (2013.01); B60G 21/055 (2013.01); B60G 2206/11 (2013.01); B60G 2206/71043 (2013.01); B60K 5/1208 (2013.01); B60K 17/00 (2013.01); C08L 2205/03 (2013.01); F16F 2224/02 (2013.01); F16M 13/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A composition comprising:
one or more amorphous polyamides;
one or more semi-crystalline polyamides; and
an additive;
wherein the difference between the heat distortion temperature and melting temperature of the composition is less than 45° C.;
wherein the composition exhibits a maximum viscoelastic loss factor (tan(δ)) at a temperature greater than 40° C. when the composition has a moisture content less than or equal to 0.2 wt %; and
wherein the maximum tan(δ) has a value ranging from 0.057 to 0.245 when the composition has a moisture content less than 0.2 wt %;
wherein the composition is free of non-polyamide polymers, flow enhancers, and flow aids.