Patent ID: 11891516
Assignee: KRATON CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A rubber composition comprising a blend of:
a rubber component and based on 100 parts by weight (phr) of the rubber component;
from 50 to 200 phr of a filler;
from 0 to 25 phr of a plasticizer;
from 5 to 90 phr dimeric decarboxylated rosin (DDCR) resin comprising 50 to 100 wt. % of polycyclic hydrocarbon compounds having one or more aliphatic, unsaturated or aromatic groups, and 34-80 carbon atoms;
wherein the DDCR has:
a molecular weight Mn of 250-900 Da, measured using gel permeation chromatography and polystyrene calibration standards;
a polydispersity index of 1.0-1.35; and
an oxygen to carbon ratio of <5%;

wherein the DDCR is formed by decarboxylating a dimeric rosin acid or by dimerizing a decarboxylated rosin.