US 12,109,766 B2
Fiber-reinforced composite molded article and method for molding same
Chiasa Kitani, Nagoya (JP); Satoshi Matsumoto, Nagoya (JP); Shigeru Kawashima, Nagoya (JP); and Atsuki Tsuchiya, Nagoya (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/796,730
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Feb. 21, 2020, PCT No. PCT/JP2020/007190
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/166241, PCT Pub. Date Aug. 26, 2021.
Prior Publication US 2023/0067964 A1, Mar. 2, 2023
Int. Cl. B29C 70/48 (2006.01); B29C 33/64 (2006.01); B29K 101/10 (2006.01); B29K 307/04 (2006.01)
CPC B29C 70/48 (2013.01) [B29C 33/64 (2013.01); B29K 2101/10 (2013.01); B29K 2307/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fiber-reinforced composite molded article prepared by curing reinforcing fibers and a thermosetting resin composition, the resin composition comprising an internal mold release agent,
wherein:
the internal mold release agent is a silicone mold release agent,
the silicone mold release agent is a silicone fluid having a functional group equivalent of 100 g/mol to 10,000 g/mol,
the silicone fluid comprises a modification group including a carboxyl or a thiol,
the thermosetting resin composition includes a bisphenol-A epoxy resin, and
the value obtained by normalizing a Poisson-corrected ion intensity derived from the internal mold release agent detected in a predetermined area of a surface of the fiber-reinforced composite molded article, by the Poisson-corrected gross positive secondary ion intensity detected in the predetermined area, is higher than 0.1.