US 9,809,670 B2
Nitrile rubber and method of preparing the same
Se Eun Lee, Daejeon (KR); Dong Jo Ryu, Daejeon (KR); Seon Hee Han, Daejeon (KR); Jeong Heon Ahn, Daejeon (KR); Hee Jung Jeon, Daejeon (KR); and Jeong Hoon Jo, Daejeon (KR)
Assigned to LG Chem, Ltd., (KR)
Appl. No. 14/421,205
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jun. 24, 2014, PCT No. PCT/KR2014/005543
§ 371(c)(1), (2) Date Feb. 12, 2015,
PCT Pub. No. WO2015/005597, PCT Pub. Date Jan. 15, 2015.
Claims priority of application No. 10-2013-0080277 (KR), filed on Jul. 9, 2013; and application No. 10-2014-0071217 (KR), filed on Jun. 12, 2014.
Prior Publication US 2015/0191563 A1, Jul. 9, 2015
Int. Cl. C08F 236/12 (2006.01); C08K 5/09 (2006.01); C08K 5/14 (2006.01); C08K 5/37 (2006.01)
CPC C08F 236/12 (2013.01) [C08K 5/09 (2013.01); C08K 5/14 (2013.01); C08K 5/37 (2013.01); Y10T 428/139 (2015.01)] 9 Claims
OG exemplary drawing
 
1. A nitrile rubber consisting of
18 to 29 wt % of at least one α,β-unsaturated nitrile monomer,
82 to 71 wt % of at least one conjugated diene monomer,
0.5 to 5 parts by weight of a fatty acid based on 100 parts by weight of the nitrile rubber;
0.01 to 10 parts by weight of alkyl thiol based on 100 parts by weight of the nitrile rubber; and
0.01 to 1 part by weight of oil-soluble peroxide based on 100 parts by weight of the nitrile rubber
wherein the α,β-unsaturated nitrile monomer is at least one selected from acrylonitrile, methacrylonitrile, fumaronitrile, α-chloronitrile or α-cyanoethyl acrylonitrile,
wherein the conjugated diene monomer is at least one selected from 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene, or isoprene,
wherein ΔACN ranges from 2 to 3, and Mooney stress-relaxation rate (MSR) of the nitrile rubber measured with a shearing-disc viscometer according to ISO 289-4:2003 E at 100° C. is in the range of 0.35 to 0.383.