Additives for rubber compositions
AssigneeArizona Chemical Company
InventorsJeffery Lin Chenchy, Godefridus J. H. Buisman, Yubin Wu
Life of this patent
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Abstract
The instant invention relates to rubber compositions comprising silica, an organomercaptosilane having a bulky group and/or a polyether group bound to the silicon atom and a rosin-containing material. The instant invention also relates to tires comprising such rubber compositions, to methods of preparation of such rubber compositions or tires thereof, and to the use of rosin-containing materials for improving the Mooney viscosity and mechanical properties of rubbers comprising the same (e.g. in a tire).
Claims25
A rubber composition comprising
- (A) a rubber;
- (B) silica;
- (C) an organomercaptosilane having a bulky group and/or a polyether group bound to the silicon atom and
- (D) a rosin-containing material (comprising at least one rosin compound and derivatives thereof) selected from at least one of rosin, dimerized rosin, hydrogenated rosin, disproportionated rosin, decarboxylated rosin and rosin ester,
- wherein the bulky group has a total number of carbon atoms and, if any, heteroatoms of at least 20.
Use of a rosin-containing material selected from rosin, dimerized rosin, hydrogenated rosin, disproportionated rosin, decarboxylated rosin and rosin ester (component D)
- in a rubber composition further comprising
- a rubber (component A);
- silica (component B);
- and
- an organomercaptosilane having a bulky group and/or a polyether group bound to the silicon atom (component C), wherein the bulky group has a total number of carbon atoms and, if any, heteroatoms of at least 20
- to obtain a rubber composition having, when the rubber composition is not cured, a reduced Mooney viscosity and/or improved mechanical properties when compared to a similar uncured rubber composition without component D;
- and/or
- to obtain a rubber composition having, when the rubber composition is cured, improved tensile strength when compared to a similar cured rubber composition without component D.
Dependencies are inferred from the claim text.