Rubber composition containing functionalized polymer nanoparticles
AssigneeBridgestone Corporation
InventorsXiaorong Wang, James E. Hall, Georg G.A. Bohm, Chenchy Jeffrey Lin
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Abstract
A polymer nanoparticle is provided. The nanoparticle includes an inner layer having alkenylbenzene monomer units. The nanoparticle further includes an outer layer having monomer units selected from conjugated dienes, alkylenes, alkenylbenzenes, and mixtures thereof. The nanoparticle has at least one functional group associated with the outer layer. Applications of use as additives for rubber, including the rubber compositions, are also provided.
Claims42
A nanoparticle comprising:
- a. an inner layer including alkenylbenzene monomer units,
- b. an outer layer including monomer units selected from the group consisting of conjugated diene, alkylene, alkenylbenzene, and mixtures thereof;
- and
- C. at least one functional group associated with the outer layer;
- wherein said nanoparticle has a mean average diameter of less than about 100 nm;
- wherein said functional group is selected from the group consisting of maleic anhydride, amine, azo, carboxylic acid, epoxide, amino, and mixtures thereof;
- provided that the functional group is not the product of an anionic initiator.
(canceled)
(canceled)
A process for forming polymer nanoparticles comprising:
- a. polymerizing alkenylbenzene monomer and conjugated diene monomer in a hydrocarbon solvent to form a diblock polymer;
- b. forming micelles of said diblock polymer;
- c. adding at least one crosslinking agent to the micelles to form crosslinked nanoparticles having an inner layer including alkenylbenzene monomer units and an outer layer including monomer units selected from the group consisting of alkenylbenzenes, conjugated dienes, and mixtures thereof, and
- d. combining said nanoparticles with at least one functional group to form functionalized nanoparticles.
A rubber composition comprising:
- a. a rubber;
- b. a polymer nanoparticle including a poly(alkenylbenzene) core;
- an outer layer including monomer units selected from the group consisting of conjugated dienes, alkenylbenzenes, alkylenes, and mixture thereof;
- and at least one functional group associated with said surface layer;
- and
- c. at least one filler.
A rubber, including a polymer nanoparticle including a poly(alkenylbenzene) core, an outer layer including monomer units selected from the group consisting of conjugated dienes, alkenylbenzenes, alkylenes, and mixtures thereof, at least one functional group associated with said surface layer, and a metal complexed with said functional group and at least one filler.
(canceled)
A nanoparticle comprising:
- a. an inner layer including alkenylbenzene monomer units,
- b. an outer layer including monomer units selected from the group consisting of conjugated diene, alkylene, alkenylbenzene, and mixtures thereof;
- and
- c. at least one functional group associated with the outer layer;
- wherein said nanoparticle has a mean average diameter of less than about 100 nm;
- wherein said alkylene monomer units are formed by hydrogenating said conjugated diene monomer units;
- wherein functional groups are located throughout the outer layer of the nanoparticle.
A nanoparticle comprising:
- a. a cross-linked inner layer including alkenylbenzene monomer units,
- b. an outer layer including monomer units selected from the group consisting of conjugated diene, alkylene, alkenylbenzene, and mixtures thereof;
- and
- c. at least one functional group associated with the outer layer;
- wherein said functional group is polar;
- wherein functional groups are located throughout the outer layer of the nanoparticle.
Dependencies are inferred from the claim text.