Resin-extended rubber and process for preparing
AssigneeBridgestone Americas Tire Operations, LLC
InventorBenjamin C. Galizio
Life of this patent
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Abstract
Disclosed herein are processes for preparing a resin-extended rubber by mixing at least one thermoplastic resin with a resin-rubber-solvent cement comprising at least one conjugated diene monomer-containing rubber and the resin-extended rubber resulting from such processes. Also disclosed is a resin-extended rubber-solvent-cement comprising at least one conjugated diene monomer-containing rubber, at least one non-polar solvent, and at least one thermoplastic resin as well as a rubber composition comprising a resin-extended rubber.
Claims20
A resin-extended rubber-solvent-cement comprising:
- a. 100 parts of at least one conjugated diene monomer-containing rubber,
- b. at least one non-polar solvent, and
- c. 5 to 100 phr of at least one thermoplastic resin, wherein the at least one thermoplastic resin is guayule resin, a dicyclopentadiene resin, or both;
- wherein the non-polar solvent is selected from the group consisting of:
- alkanes having from 4 to 9 carbon atoms, cycloalkanes or alkyl cycloalkanes having from 5 to 10 carbon atoms, or aromatics and alkyl substituted aromatics having from 6 to 12 carbon atoms.
A rubber composition comprising:
- a. resin-extended rubber comprising n parts of rubber including at least one conjugated diene monomer-containing rubber and up to 100 phr of at least one thermoplastic resin, wherein n is an integer from 10 to 100;
- b. optionally at least one additional rubber in an amount of 100−n parts;
- c. at least one reinforcing filler in a total amount of 10-200 phr;
- and
- d. a cure package;
- wherein the at least one thermoplastic resin is guayule resin.
A resin-extended rubber-solvent-cement comprising:
- a. 100 parts of at least one conjugated diene monomer-containing rubber, wherein the at least one conjugated diene monomer-containing rubber comprises at least one of styrene-butadiene copolymer, polybutadiene, styrene-isoprene rubber, styrene-butadiene-isoprene rubber, natural rubber, or polyisoprene;
- b. at least one non-polar solvent, wherein the non-polar solvent is selected from the group consisting of:
- alkanes having from 4 to 9 carbon atoms, cycloalkanes or alkyl cycloalkanes having from 5 to 10 carbon atoms, or aromatics and alkyl substituted aromatics having from 6 to 12 carbon atoms, and
- c. 5 to 100 phr of at least one thermoplastic resin, extended with a second non-polar solvent;
- wherein the resin comprises at least one of:
- C5 resin, C9 resin, terpene resin, terpene-phenolic resin, rosin resin, cyclopentadiene resin, guayule resin, phenol novolak resin, phenol-formaldehyde resin, resorcinol-formaldehyde resin, reactive resol resin, reactive novolak type phenol-formaldehyde resin, or a combination thereof;
- wherein the at least one conjugated diene monomer-containing rubber is produced by an anionic polymerization process that utilizes a randomizer.
Dependencies are inferred from the claim text.