US 12,384,906 B2
Polyolefin compositions having improved volume resistivity
Yunfeng Yang, Shanghai (CN); Xiaosong Wu, Sugar Land, TX (US); Bo Lyu, Shanghai (CN); Yong Chen, Shanghai (CN); Xianmin Xu, Shanghai (CN); and Tao Han, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/638,431
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 30, 2019, PCT No. PCT/CN2019/103785
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/035710, PCT Pub. Date Mar. 4, 2021.
Prior Publication US 2022/0298338 A1, Sep. 22, 2022
Int. Cl. C08L 23/0807 (2025.01)
CPC C08L 23/0815 (2013.01) [C08L 2312/00 (2013.01)] 12 Claims
 
1. A curable composition comprising, based on the weight of the curable composition:
from 40 wt % to 84 wt % of a non-Ziegler Natta catalyzed polyolefin having a Mooney viscosity ML 1+4 at 125° C. from 5 MU to 50 MU, in accordance with ASTM 1646;
from 15 wt % to 40 wt % of siliceous earth;
from 0.01 wt % to 8 wt % of a crosslinking agent consisting of one or more organic peroxides;
from 0.01 wt % to 5 wt % of a crosslinking co-agent selected from the group consisting of: trimethylolpropane trimethacrylate (TRIM); triallyl cyanurate (TAC); triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione also known as triallyl isocyanurate (TAIC); hexaallyl melamine; triallyl phosphate (TAP); triallyl ortho formate; tetra-allyloxy-ethane; triallyl benzene-1,3,5-tricarboxylate; diallyl phthalate; diallyl terephthalate; zinc dimethacrylate; ethoxylated bisphenol A dimethacrylate, and combinations thereof; and
from 0.01 wt % to 20 wt % of an additive component comprising of an oxide of calcium, zinc, iron, titanium, and aluminum and further comprising an antioxidant and wherein the curable composition has a volume resistivity of greater than 3.0E+15 ohm·cm.