	US 12,227,651 B2
	Rubber blend, sulfur-crosslinkable rubber mixture, and vehicle tire
Carla Recker, Hannover (DE); Catarina Sa, Isernhagen (DE); Kathrin Wehming-Bomkamp, Bad Nenndorf (DE); Viktoria Pavon Sierra, Hannover (DE); Norbert Mueller, Nienhagen (DE); and Michael Radke, Hannover (DE)
Assigned to Continental Reifen Deutschland GmbH, Hannover (DE)
Filed by Continental Reifen Deutschland GmbH, Hannover (DE)
Filed on Jan. 25, 2022, as Appl. No. 17/648,873.
Application 17/648,873 is a continuation in part of application No. 16/325,727, granted, now 11,292,895, previously published as PCT/EP2017/067951, filed on Jul. 17, 2017.
Prior Publication US 2022/0145049 A1, May 12, 2022
Int. Cl. C08L 9/06 (2006.01); C08L 15/00 (2006.01)

CPC C08L 9/06 (2013.01) [C08L 15/00 (2013.01); C08L 2201/08 (2013.01); C08L 2205/025 (2013.01)]

24 Claims

1. A rubber blend comprising:

at least one solution-polymerized diene polymer A of high molecular weight, formed from at least one conjugated diene and one or more optional vinylaromatic compound(s), having a vinylaromatic content of 0% to 50% by weight, a vinyl content of 8% to 80% by weight based on any diene content present, a glass transition temperature Tg according to DSC of −100° C.<Tg<−35° C., a molecular weight Mw according to GPC of more than 350000 g/mol, and a polydispersity PD of 1.1<PD<3;

at least one solution-polymerized polymer B of low molecular weight, formed from at least one conjugated diene, at least one conjugated diene and one or more vinylaromatic compound(s), or at least one or more vinylaromatic compound(s), having a vinylaromatic content of 0% to 50% by weight, a vinyl content of 8% to 80% by weight based on any diene content present, a glass transition temperature Tg according to DSC of −50° C.<Tg<+80° C., a molecular weight Mw according to GPC of 1300 g/mol<Mw<10000 g/mol, and a polydispersity PD of 1<PD<1.5;

30 to 300 phr of at least one silica; and,

1 to 20 phf of at least one blocked and/or unblocked mercaptosilane as silane coupling agent;

wherein at least one of polymers A and B has been functionalized at the chain end and/or along the polymer chain and/or at a coupling site with at least one group selected from epoxy groups, hydroxyl groups, carboxyl groups, silane sulfide groups, amino groups, siloxane groups, organosilicon groups, phthalocyanine groups and amino group-containing alkoxysilyl groups.