US 11,053,377 B2
Rubber compounds for pneumatic tyre parts comprising lignin as dispersing agent
Raffaele Di Ronza, Rome (IT); Claudia Aurisicchio, Rome (IT); and Ludovica Caliano, Rome (IT)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 16/477,317
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Jan. 23, 2018, PCT No. PCT/EP2018/051521
§ 371(c)(1), (2) Date Jul. 11, 2019,
PCT Pub. No. WO2018/138071, PCT Pub. Date Aug. 2, 2018.
Claims priority of application No. 102017000007087 (IT), filed on Jan. 24, 2017.
Prior Publication US 2020/0032036 A1, Jan. 30, 2020
Int. Cl. C08L 97/00 (2006.01); C08L 9/06 (2006.01); B60C 1/00 (2006.01); C08K 3/36 (2006.01)
CPC C08L 9/06 (2013.01) [B60C 1/00 (2013.01); C08K 3/36 (2013.01); C08L 97/005 (2013.01)] 9 Claims
 
1. Rubber compound for the preparation of pneumatic tyre parts comprising at least one crosslinkable unsaturated-chain polymer base, a filler, a vulcanization system and a dispersing agent;
said compound being characterized in that said dispersing agent comprises a functionalized lignin having a plurality of functionalizations of the general formula I

OG Complex Work Unit Chemistry
wherein R and R′ are different from each other and chosen from —OH and —OArLig and
n is an integer between 1 and 6.