US 12,215,224 B2
Unsaturated polyester resin composition, molding material, molded article, and battery pack casing for electric vehicle
Ikuo Akai, Shizuoka (JP); Masahiro Hakotani, Shizuoka (JP); and Takashi Tsukamoto, Shizuoka (JP)
Assigned to JAPAN COMPOSITE CO., LTD., Tokyo (JP)
Appl. No. 17/424,917
Filed by JAPAN COMPOSITE CO., LTD., Tokyo (JP)
PCT Filed Jan. 29, 2020, PCT No. PCT/JP2020/003218
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/162288, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 2019-019045 (JP), filed on Feb. 5, 2019.
Prior Publication US 2022/0089864 A1, Mar. 24, 2022
Int. Cl. C08L 67/06 (2006.01); H01M 50/224 (2021.01); H01M 50/227 (2021.01); H01M 50/229 (2021.01); H01M 50/233 (2021.01); H01M 50/249 (2021.01)
CPC C08L 67/06 (2013.01) [H01M 50/224 (2021.01); H01M 50/227 (2021.01); H01M 50/229 (2021.01); H01M 50/233 (2021.01); H01M 50/249 (2021.01); H01M 2220/20 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An unsaturated polyester resin composition comprising:
a resin component including an unsaturated polyester, a polymerizable monomer, and a low shrinkage agent; aluminum hydroxide; and an electrically conductive filler, wherein
the unsaturated polyester is a polymerization product of a polybasic acid and a polyhydric alcohol;
the polybasic acid includes a polybasic acid having an ethylenically unsaturated double bond;
a mixing ratio of the polybasic acid having an ethylenically unsaturated double bond is 80 mol % or more with respect to 100 mol % of the polybasic acid;
the low shrinkage agent includes polyvinyl acetate;
a mixing ratio of the polyvinyl acetate is 3 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the resin component;
a mixing ratio of the aluminum hydroxide is 50 parts by mass or more and 300 parts by mass or less with respect to 100 parts by mass of the resin component;
the electrically conductive filler includes an electrically conductive fiber;
the electrically conductive fiber includes an electrically conductive short fiber having a fiber length of 0.01 mm or more and 0.15 mm or less; and
a mixing ratio of the electrically conductive short fiber is 12% by mass or more and 50% by mass or less with respect to the electrically conductive fiber.