Tire composition and method for making thereof
AssigneeKraton Corporation
InventorsJochem H. W. Vervelde, Jeremie G. Pichereau, Jeroen van Herrikhuyzen, Mark Schaapman, Pieter Eduard
Life of this patent
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Abstract
The disclosure relates to a composition for use in tires. The rubber composition comprises 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, and from 5 to 90 phr dimeric decarboxylated rosin (DDCR). The DDCR resin comprises 50 to 100 wt. % of polycyclic hydrocarbon compounds having one or more aliphatic, unsaturated, or aromatic groups, and 34-80 carbon atoms, with a molecular weight Mn of 250-900 Da, a polydispersity index of 1.0-1.35, and an oxygen to carbon ratio of <5%.
Claims20
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.
A method for preparing a tire rubber composition comprising:
- providing 0-100 parts by weight (phr) of a rubber component,
- providing from 5-75 phr of a dimeric decarboxylated rosin (DDCR) comprising 50-100 wt. % of polycyclic hydrocarbon compounds having one or more aliphatic, unsaturated, or aromatic groups, and 34-80 carbon atoms, having:
- 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;
- providing from 50-200 phr of a filler, and optionally up to 75 phr of a plasticizer;
- mixing the rubber component, the DDCR resin, the filler, and the optional plasticizer to form a mixture;
- kneading the mixture;
- and
- incorporating a cross-linking system into the kneaded mixture to form the tire rubber composition.
Dependencies are inferred from the claim text.