US 12,234,358 B2
Polyamide resin composition comprising specific ionomer
Kazunari Abe, Kanagawa (JP)
Assigned to JAPAN POLYETHYLENE CORPORATION, Tokyo (JP); and JAPAN POLYPROPYLENE CORPORATION, Tokyo (JP)
Appl. No. 17/599,889
Filed by JAPAN POLYETHYLENE CORPORATION, Tokyo (JP); and JAPAN POLYPROPYLENE CORPORATION, Tokyo (JP)
PCT Filed Apr. 1, 2020, PCT No. PCT/JP2020/014999
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/204063, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-070502 (JP), filed on Apr. 2, 2019.
Prior Publication US 2022/0169847 A1, Jun. 2, 2022
Int. Cl. C08L 77/00 (2006.01); C08F 210/02 (2006.01)
CPC C08L 77/00 (2013.01) [C08F 210/02 (2013.01)] 11 Claims
 
1. A polyamide resin composition consisting of a polyamide resin (I) and an ionomer (II), wherein:
the polyamide resin (I) is a polymer obtained from:
at least one lactam selected from the group consisting of ε-caprolactam, enantholactam, and lauryllactam;
at least one aminocarboxylic acid selected from the group consisting of 6-aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 9-aminononanoic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid; or
at least one combination of a diamine and a dicarboxylic acid, wherein:
the diamine is selected from the group consisting of 1,4-butanediamine, 1,5-pentanediamine, 1,6-hexanediamine, 1,5-hexanediamine, 1,9-nonanediamine, 1,11-undecanediamine, 1,12-dodecanediamine, α,ω-diaminopolypropylene glycol, m-phenylenediamine, and p-phenylenediamine, and
the dicarboxylic acid is selected from the group consisting of adipic acid, sebacic acid, dodecanedioic acid, glutaric acid, terephthalic acid, and isophthalic acid; and
the ionomer (II) is an ionomer which satisfies the following requirements:
the ionomer is derived from a copolymer (P) which comprises, as essential constituent units, structural units (A) derived from ethylene and/or an α-olefin having 3 to 20 carbon atoms and structural units (B) derived from a monomer having a carboxyl group and/or a dicarboxylic anhydride group, wherein at least part of the carboxyl group and/or dicarboxylic anhydride group in the copolymer (P) has been converted to a metal-containing carboxylic acid salt containing ions of at least one metal selected from metals belonging to Groups 1, 2, and 12 of the Periodic Table, and wherein the ionomer has a phase angle δ of 50 to 75 degrees at a complex modulus absolute value G* of 0.1 MPa, as measured by a rotational rheometer.