Diene polymers and copolymers having an alkoxysilane group
AssigneeBridgestone Corporation
InventorTakashi Shimizu
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Abstract
A functionalized polymer includes a diene-type polymer having an alkoxysilane, aryloxysilane or aralkyloxysilane group, wherein the functionalized polymer has a molecular structure represented by at least one of the following formula(1), formula(2), and formula(3): ##STR1## Further, an elastomeric composition is provided which includes a rubber material containing the functionalized polymer, and a filler such as white carbon. The functional polymer and the elastomeric composition exhibit excellent fracture properties, abrasion resistance, and low hysteresis (low rolling resistance and low fuel consumption).
Claims33
A functionalized polymer comprising a conjugated diene polymer or a conjugated diene/vinyl aromatic hydrocarbon polymer having at least one of an alkoxysilane group, an aryloxysilane group or an aralkyloxysilane group wherein the functionalized polymer has a molecular structure selected from the group consisting of formula (1), formula (2), formula (3), and mixtures thereof:
- ##STR5## wherein P represents a conjugated diene polymer or a conjugated diene/vinyl aromatic hydrocarbon polymer;
- R.sup.1 and R.sup.2 may be the same or different, and are each selected from the group consisting of an aliphatic hydrocarbon group, an alicyclic hydrocarbon group and an aromatic hydrocarbon group, each having 20 or less carbon atoms, or R.sup.1 and R.sup.2 may be bonded together with the nitrogen atom to form a heterocyclic ring, wherein the heterocyclic ring may additionally contain an oxygen atom or a nitrogen atom;
- R.sup.3 and R.sup.4 may be the same or different, and are each selected from the group consisting of an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, and an aromatic hydrocarbon group, each having 20 or less carbon atoms;
- R.sup.5 is selected from the group consisting of an aliphatic hydrocarbon group and an alicyclic hydrocarbon group, each having 20 or less carbon atoms;
- R.sup.6 is selected from the group consisting of an oxygen atom and a methylene group;
- R.sup.7 represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms;
- x represents an integer of 1 to 3;
- x+y and x+y+z each represent an integer of 2 to 4;
- n represents 0 or 1;
- and when y is 2 or 3, each R.sup.3 may be the same or different.
An elastomeric composition comprising:
- a rubber material containing a functionalized copolymer in an amount of 10 or more parts by weight in 100 parts by weight of the rubber material, and
- a filler in an amount of 10 to 100 parts by weight based on 100 parts by weight of the rubber material,
- wherein the filler contains a white carbon, and the functionalized polymer comprises a conjugated diene polymer or a conjugated diene/vinyl aromatic hydrocarbon polymer having at least one of an alkoxysilane group, an aryloxysilane group or an aralkyloxysilane group, wherein the functionalized polymer has a molecular structure selected from the group consisting of formula (1), formula (2), formula (3), and mixtures thereof:
- ##STR6## wherein P represents a conjugated diene polymer or a conjugated diene/vinyl aromatic hydrocarbon polymer;
- R.sup.1 and R.sup.2 may be the same or different, and are each selected from the group consisting of an aliphatic hydrocarbon group, an alicyclic hydrocarbon group and an aromatic hydrocarbon group, each having 20 or less carbon atoms, or R.sup.1 and R.sup.2 may be bonded together with the nitrogen atom to form a heterocyclic ring, wherein the heterocyclic ring may additionally contain an oxygen atom or a nitrogen atom;
- R.sup.3 and R.sup.4 may be the same or different, and are each selected from the group consisting of an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, and an aromatic hydrocarbon group, each having 20 or less carbon atoms;
- R.sup.5 is selected from the group consisting of an aliphatic hydrocarbon group and an alicyclic hydrocarbon group, each having 20 or less carbon atoms;
- R.sup.6 is selected from the group consisting of an oxygen atom and a methylene group;
- R.sup.7 represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms;
- x represents an integer of 1 to 3;
- x+y and x+y+z each represent an integer of 2 to 4;
- n represents 0 or 1;
- and when y is 2 or 3, each R.sup.3 may be the same or different.
Dependencies are inferred from the claim text.