US 12,415,920 B2
Thermosetting resin composition, thermosetting resin cured product, prepreg and fiber-reinforced composite material
Itaru Asano, Nagoya (JP); Atsuhito Arai, Ehime (JP); Ryohei Watari, Ehime (JP); and Tomohiko Nakamura, Nagoya (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/783,072
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Dec. 18, 2020, PCT No. PCT/JP2020/047472
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/132091, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-231132 (JP), filed on Dec. 23, 2019.
Prior Publication US 2023/0054021 A1, Feb. 23, 2023
Int. Cl. C08L 63/00 (2006.01); C08G 59/50 (2006.01); C08G 69/14 (2006.01); C08G 69/40 (2006.01); C08J 5/04 (2006.01); C08J 5/24 (2006.01)
CPC C08L 63/00 (2013.01) [C08G 59/5033 (2013.01); C08G 69/14 (2013.01); C08G 69/40 (2013.01); C08J 5/042 (2013.01); C08J 5/243 (2021.05); C08J 2363/00 (2013.01); C08J 2377/02 (2013.01); C08L 2205/18 (2013.01)] 11 Claims
 
1. A thermosetting resin composition comprising:
[A] a thermosetting resin;
[B] a curing agent; and
[C] polyamide particles, wherein the polyamide particles contain a polyamide resin comprising a constituent unit of formula (1):

OG Complex Work Unit Chemistry
where n represents an integer of 4 to 7, and wherein the polyamide particles satisfy (c1) to (c5):
(c1) a melting point of polyamide resin constituting the polyamide particles is 200 to 300° C.;
(c2) a crystallization temperature of the polyamide resin constituting the polyamide particles is 150° C. to 250° C.;
(c3) a number average particle size of the polyamide particles is 1 to 100 um;
(c4) a sphericity of the polyamide particles is 80 to 100; and
(c5) a linseed oil absorption of the polyamide particles is 10 to 100 mL/100 g;
(c6) having no exothermic peak in the temperature range between the glass transition temperature and the melting point.