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US 2003/0149185 A1Published application
Multi-layer nano-particle preparation and applications
AssigneeBridgestone Corporation
InventorsXiaorong Wang, Victor J. Foltz
Life of this patent
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Abstract
A multi-layer nano-particle composition including a polymer core and at least two additional layers is provided. The nano-particles have a mean average diameter less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can be advantageously incorporated into rubbers, elastomers, and thermoplastics.
Claims47
A multi-layer polymer nano-particle composition comprising:
- a. a poly(alkenylbenzene) layer, and
- b. at least two additional polymer layers,
- wherein said nano-particles have a mean average diameter of less than about 100 nm.
A process for forming a multi-layer polymer nano-particle comprising;
- a. initiating a polymerization of at least a first monomer in a hydrocarbon solvent to form a living polymerization mixture;
- b. adding at least a second monomer to the polymerization mixture allowing the second monomer to polymerize onto a living polymer chain to form a living block copolymer chain;
- c. adding an alkenylbenzene monomer to polymerize onto the living block copolymers chain;
- d. allowing the living block copolymer chains to form micelles;
- and
- e. adding at least one crosslinking agent to the polymerization mixture to form cross-linked nano-particles from said micelles.
3 more elements
A nano-particle composition comprising:
- a. a poly(alkenylbenzene) core,
- b. a polyalkylene surface layer comprising at least one alkylene contributed monomer unit, and
- c. at least one additional layer,
- wherein said nano-particles have a mean average diameter of less than about 100 nm.
1 more element
A polymer nano-particle comprising:
- a. a poly(alkenylbenzene) core,
- b. at least two additional layers, one of which comprises an outer layer, and
- wherein said nano-particles have a mean average diameter of less than about 100 nm.
- c. said outer layer including a functional group.
1 more element
A rubber composition comprising:
- a. a rubber, and
- b. a polymer nano-particle including a poly(alkenylbenzene) core and at least two additional layers independently including monomer units selected from the group consisting of conjugated dienes, alkylenes, alkenylbenzene, acrylates, nitriles, and mixtures thereof.
Dependencies are inferred from the claim text.