Patent ID: 7081234

Claim:
A process of making treated metal oxide nanoparticles, comprising mixing metal oxide nanoparticles, a solvent, and a surface treatment agent, wherein the surface treatment agent has a structure represented by formula (I) R-Z(X) n Y 3-n (I) wherein R and X each independently represents an alkyl group containing from about 1 carbon atom to about 30 carbon atoms, an aryl group containing from about 6 to about 60 carbon atoms, a substituted alkyl group containing from about 1 to about 30 carbon atoms or a substituted aryl group containing from about 6 to about 60 carbon atoms, an organic group containing of from about 1 to about 30 carbon atoms and a carbon—carbon double bond or a carbon—carbon triple bond, and epoxy-group, Z represents a silicon atom, titanium atom, aluminum atom or zirconium atom, and Y represents a hydrogen atom, a halogen atom, a hydroxyl group, an alkoxy group, or an allyl group, and n is an integer of from 0 to 3, or wherein the surface treatment agent has a structure represented by formula (III) wherein R 1 and R 2 each independently represents an alkyl group of from about 1 to about 30 carbon atoms, an aryl group of from about 6 to about 60 carbon atoms, and a substituted alkyl group or a substituted aryl group of from about 1 to about 30 carbon atoms, and z represents an integer of from about 3 to about 10, and heating the mixture to a temperature of at least about 80° C. for a period of at least about 1 hour.