US 12,459,295 B2
Functionalized polymers tread additive to improve tire performance for immiscible all-season tread
Edward J. Blok, Huffman, TX (US); Paul T. Q. Nguyen, League City, TX (US); Anthony J. Dias, Houston, TX (US); Ranjan Tripathy, Sugar Land, TX (US); and Jason A. Mann, Houston, TX (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Appl. No. 17/783,036
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
PCT Filed Dec. 9, 2020, PCT No. PCT/US2020/064007
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/126627, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/949,151, filed on Dec. 17, 2019.
Prior Publication US 2023/0043808 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B60C 1/00 (2006.01); C08L 7/00 (2006.01); C08L 9/06 (2006.01)
CPC B60C 1/0016 (2013.01) [C08L 7/00 (2013.01); C08L 9/06 (2013.01)] 25 Claims
 
1. An elastomeric composition comprising, per 100 parts by weight of rubber (phr):
about 5 to about 40 phr of styrene/butadiene copolymer;
about 60 to about 100 phr of natural rubber or polyisoprene;
a curative agent;
an antioxidant;
about 1 to about 20 phr carbon black;
about 5 to about 40 phr plasticizing agent;
about 40 to about 80 phr silica;
about 1 to about 20 phr silane coupling agent;
and about 5 to about 30 phr of a polymer selected from the group consisting of ethylene-propylene-diene terpolymer, butyl rubber, poly(isobutylene-co-para-methylstyrene) and poly(isobutylene-co-para-methylstyrene-co-isoprene) terpolymer, wherein the polymer is functionalized with an epoxy, thioacetate, mercaptobenzothiazole, amine ionomer, phosphine ionomer or citranellol functional group.