US 12,378,410 B2
Polyamide composition and a tubular or pipe multilayer structure comprising the same
Mohammad Meysami, Budd Lake, NJ (US); Gijsbrecht Jacobus Maria Habraken, Ludwigshafen (DE); and Stephen J. Hanley, Budd Lake, NJ (US)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/608,671
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed May 4, 2020, PCT No. PCT/EP2020/062243
§ 371(c)(1), (2) Date Nov. 3, 2021,
PCT Pub. No. WO2020/225176, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/844,803, filed on May 8, 2019.
Claims priority of application No. 19177559 (EP), filed on May 31, 2019.
Prior Publication US 2022/0204763 A1, Jun. 30, 2022
Int. Cl. C08L 77/02 (2006.01); F16L 11/04 (2006.01)
CPC C08L 77/02 (2013.01) [F16L 11/04 (2013.01); C08L 2203/18 (2013.01); C08L 2203/30 (2013.01); C08L 2205/025 (2013.01)] 15 Claims
 
1. A polyamide composition, comprising:
(a) a polyamide copolymer obtained by reacting
(i) ε-caprolactam, and
(ii) a mixture of hexamethylenediamine with a diacid comprising at least 9 carbon atoms,
wherein the weight ratio between (i) and (ii) is in between 1.0:1.0 to 3.0:1.0,
(b) at least one polyamide which is different from (a),
(c) at least one impact modifier having a glass transition temperature below 0° C., and
(d) additives
wherein the impact modifier is selected from (i) ethylene-methacrylic acid copolymer, (ii) ethylene polymers and copolymers grafted with an epoxy compound, and (iii) olefin or acrylic acid or anhydride terpolymers.