US 11,990,253 B2
Insulating resin composition and production method therefor, insulating tape and production method therefor, insulating layer formation method, and power cable and production method therefor
Tetsuya Mieda, Tokyo (JP); and Takahiro Kanaya, Tokyo (JP)
Assigned to FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Appl. No. 17/599,166
Filed by FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014712
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/204012, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-069322 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0157488 A1, May 19, 2022
Int. Cl. H01B 9/04 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/88 (2019.01); B32B 15/08 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); C08J 5/18 (2006.01); C08L 23/04 (2006.01); H01B 3/44 (2006.01); H01B 13/14 (2006.01); B29L 7/00 (2006.01)
CPC H01B 3/441 (2013.01) [B29C 48/0022 (2019.02); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 48/9135 (2019.02); B32B 15/08 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); C08J 5/18 (2013.01); C08L 23/04 (2013.01); H01B 9/04 (2013.01); H01B 13/14 (2013.01); B29K 2023/06 (2013.01); B29K 2995/0007 (2013.01); B29L 2007/007 (2013.01); B32B 2264/108 (2013.01); B32B 2307/206 (2013.01); B32B 2307/732 (2013.01); B32B 2457/00 (2013.01); C08J 2323/04 (2013.01); C08J 2423/26 (2013.01); C08L 2203/202 (2013.01); C08L 2205/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An insulating resin composition comprising at least: a base resin; and an antioxidant, the base resin comprising: a polyolefin resin modified with a polar group-containing molecule; and an unmodified polyolefin resin,
the polar group-containing molecule, with which the polyolefin resin is modified, being at least one selected from an unsaturated dicarboxylic acid, an unsaturated dicarboxylic acid anhydride, and an unsaturated dicarboxylic acid anhydride derivative,
the base resin having what is called a sea-island structure comprising: a first phase comprising the unmodified polyolefin resin; and a second phase provided in the first phase and comprising the modified polyolefin resin, the second phase having an average diameter of 2 μm or less.