US 12,448,501 B2
Rubber composition for tire tread and manufacturing method thereof
Jae-Yun Kim, Daejeon (KR); Dong Eun Kang, Daejeon (KR); and Junhoo Park, Daejeon (KR)
Assigned to KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
Filed by KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
Filed on Sep. 12, 2022, as Appl. No. 17/942,649.
Claims priority of application No. 10-2021-0121830 (KR), filed on Sep. 13, 2021.
Prior Publication US 2023/0098008 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01)
CPC C08L 9/06 (2013.01) [B60C 1/0016 (2013.01); C08L 2205/03 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A rubber composition for a tire tread, comprising:
a rubber polymer;
a petroleum resin; and
a functionalized processing aid,
wherein the functionalized processing aid is a bond of a silane-based compound and a cardanol-derived structure, represented by the following formula 1:
(R1)3Si—R2—Z-(E)n   [Formula 1]
wherein R1 is each independently a linear or branched alkyl group or alkoxyalkyl group having 1 to 10 carbon atoms,
R2 is a linear or branched alkylene group having 1 to 20 carbon atoms,
Z is nitrogen, sulfur or oxygen, and
E is each independently hydrogen or a cardanol-derived structure represented by the following formula 1-1:

OG Complex Work Unit Chemistry
wherein at least one E is not hydrogen, and
n is 1 or 2,
wherein the molar ratio of the silane-based compound and the cardanol-derived structure is 1:2 to 8.