	US 12,351,661 B2
	Maleimide-based copolymer and resin composition
Masanori Matsumoto, Tokyo (JP); and Kohei Nishino, Tokyo (JP)
Assigned to Denka Company Limited, Tokyo (JP)
Appl. No. 18/040,297
Filed by Denka Company Limited, Tokyo (JP)
PCT Filed Jun. 8, 2021, PCT No. PCT/JP2021/021771 § 371(c)(1), (2) Date Feb. 2, 2023, PCT Pub. No. WO2022/044480, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-145428 (JP), filed on Aug. 31, 2020.
Prior Publication US 2024/0279372 A1, Aug. 22, 2024
Int. Cl. C08F 212/08 (2006.01); C08L 9/06 (2006.01); B29C 65/18 (2006.01); B29K 25/00 (2006.01); B29K 35/00 (2006.01); B29K 79/00 (2006.01); B29K 105/00 (2006.01)

CPC C08F 212/08 (2013.01) [C08L 9/06 (2013.01); B29C 65/18 (2013.01); B29K 2025/00 (2013.01); B29K 2035/00 (2013.01); B29K 2079/08 (2013.01); B29K 2105/0002 (2013.01); B29K 2105/0085 (2013.01); C08L 2205/06 (2013.01)]

8 Claims

1. A maleimide-based copolymer comprising:

40% to 65% by mass of an aromatic vinyl-based monomer unit;

35% to 60% by mass of a maleimide-based monomer unit, and

0.1% to 10% by mass of an unsaturated dicarboxylic acid-based monomer unit,

wherein a residual amount of an aromatic vinyl-based monomer is 200 to 2000 ppm by mass, and a residual amount of a maleimide-based monomer is 30 to 400 ppm by mass.