	US 12,071,512 B2
	Polyamide resin composition
Hideo Aso, Yamaguchi (JP); Shuji Kubota, Osaka (JP); and Yoshitaka Ayuzawa, Shiga (JP)
Assigned to TOYOBO MC CORPORATION, Osaka (JP)
Appl. No. 17/440,363
Filed by TOYOBO MC Corporation, Osaka (JP)
PCT Filed Mar. 12, 2020, PCT No. PCT/JP2020/010826 § 371(c)(1), (2) Date Sep. 17, 2021, PCT Pub. No. WO2020/189502, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-052998 (JP), filed on Mar. 20, 2019.
Prior Publication US 2022/0162381 A1, May 26, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 63/00 (2006.01); C08G 69/00 (2006.01); C08K 13/02 (2006.01); C08K 3/34 (2006.01); C08K 5/098 (2006.01); C08K 5/544 (2006.01)

CPC C08G 69/00 (2013.01) [C08K 13/02 (2013.01); C08K 3/346 (2013.01); C08K 5/098 (2013.01); C08K 5/544 (2013.01)]

19 Claims

1. A polyamide resin composition comprising 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), wherein an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 μm and not greater than 60 μm,

the average particle size of the secondary particles of the talc (B) is an average value determined by a method that includes observing a molded article obtained by injection-molding the polyamide resin composition with a scanning electron microscope at a magnification of 500 times, measuring maximum lengths of 500 secondary particles having a maximum length larger than an average particle size of primary particles of the talc (B), and calculating the average value of the maximum lengths of 100 secondary particles in descending order, and

the crystalline polyamide resin (A) comprises polyamide 6.