US 11,912,810 B2
Composition for preparing vinyl chloride-based polymer and method for preparing vinyl chloride-based polymer using the same
Kyung Seog Youk, Daejeon (KR); Heung Kwon Bae, Daejeon (KR); Jung Rae Lee, Daejeon (KR); Hyun Min Lee, Daejeon (KR); Joong Chul Lim, Daejeon (KR); and Min Jeong Kang, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/058,316
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 7, 2019, PCT No. PCT/KR2019/013091
§ 371(c)(1), (2) Date Nov. 24, 2020,
PCT Pub. No. WO2020/076023, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 10-2018-0119879 (KR), filed on Oct. 8, 2018.
Prior Publication US 2021/0087303 A1, Mar. 25, 2021
Int. Cl. C08F 4/38 (2006.01); C08F 2/22 (2006.01)
CPC C08F 4/38 (2013.01) [C08F 2/22 (2013.01)] 8 Claims
 
1. A composition for preparing a vinyl chloride-based polymer, the composition comprising:
a vinyl chloride-based first seed;
a vinyl chloride-based second seed;
an initiator composition comprising a water-soluble initiator and an oil-soluble initiator;
a reducing agent; and
a vinyl chloride-based monomer,
wherein the composition does not comprise a metal catalyst, and
wherein an amount of the reducing agent is 60 to 100 ppm based on a weight of the vinyl chloride-based monomer.