	US 12,290,991 B2
	Thermoplastic resin composition for millimeter-wave radar member, molded article, and method for producing resin composition
Hidekazu Shoji, Hiratsuka (JP)
Assigned to MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
Appl. No. 17/612,336
Filed by MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
PCT Filed May 15, 2020, PCT No. PCT/JP2020/019421 § 371(c)(1), (2) Date Nov. 18, 2021, PCT Pub. No. WO2020/235472, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-094719 (JP), filed on May 20, 2019; and application No. 2020-066525 (JP), filed on Apr. 2, 2020.
Prior Publication US 2022/0325037 A1, Oct. 13, 2022
Int. Cl. C08L 67/02 (2006.01); B29C 48/40 (2019.01); B29C 65/16 (2006.01); C08F 222/06 (2006.01); C08G 59/24 (2006.01); C08K 3/04 (2006.01); C08K 7/14 (2006.01); C08K 9/08 (2006.01); C08L 25/08 (2006.01); C08L 51/04 (2006.01); C08L 69/00 (2006.01); G01S 7/02 (2006.01); G01S 7/03 (2006.01); G01S 13/931 (2020.01); H01Q 1/42 (2006.01)

CPC B29C 65/1635 (2013.01) [B29C 48/40 (2019.02); C08F 222/06 (2013.01); C08G 59/245 (2013.01); C08K 3/04 (2013.01); C08K 7/14 (2013.01); C08K 9/08 (2013.01); C08L 25/08 (2013.01); C08L 51/04 (2013.01); C08L 69/00 (2013.01); G01S 7/027 (2021.05); G01S 7/03 (2013.01); G01S 13/931 (2013.01); H01Q 1/42 (2013.01); C08K 2201/019 (2013.01); C08L 2201/10 (2013.01); C08L 2205/03 (2013.01)]

20 Claims

1. A millimeter-wave radar article, comprising:

a first molded body, configured as an absorption-side member, comprising carbon black in a range of from 0.2 to 1 mass %; and

a second molded body, configured as a transmission-side member, comprising a thermoplastic resin composition,

wherein the thermoplastic resin composition comprises, relative to 100 parts by mass of a polybutylene terephthalate resin (A):

the polybutylene terephthalate resin (A);

a rubber-reinforced polystyrene resin (B1) in a range of from 15 to 65 parts by mass and/or a polycarbonate resin (B2) in a range of from 10 to 70 parts by mass, as component (B);

an epoxy compound (D) in a range of from 0.1 to 3 parts by mass; and

a glass fiber (E) in a range of from 30 to 150 parts by mass, and

wherein the first molded piece is laser welded to the second molded piece by laser welding by irradiating laser light upon the carbon black and the thermoplastic resin composition so as to weld and integrate the first and second molded bodies.