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US 2013/0157189 A1Published application
Toners Containing Large Strontium Titanate Particles
AssigneeXerox Corporation
InventorThomas R. Pickering
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Abstract
Disclosed is a toner composition comprising: (a) resin particles; and (b) strontium titanate particles having an average particle diameter of at least about 400 nm.
Claims20
A toner composition comprising:
- (a) resin particles;
- and
- (b) strontium titanate particles having an average particle diameter of at least about 400 nm.
An emulsion aggregation toner composition comprising:
- (a) resin particles comprising a resin, a colorant, and a wax;
- and
- (b) strontium titanate particles, wherein said strontium titanate particles
- (i) have an average particle diameter of at least about 400 nm, and
- (ii) have an average particle diameter of no more than about 1,500 nm;
- wherein said strontium titanate particles do not adhere to the resin particles.
3 more elements
An emulsion aggregation toner composition comprising:
- (a) resin particles comprising a resin, a colorant, and a wax, wherein the resin comprises:
- (i) a styrene-butyl acrylate copolymer;
- or
- (ii) an amorphous polyester of the formula
- wherein m is from about 5 to about 1000 and a crystalline polyester is of the formula
- wherein b is from about 5 to about 2000 and d is from about 5 to about 2000;
- (b) uncoated strontium titanate particles, wherein said uncoated strontium titanate particles
- (i) have an average particle diameter of at least about 400 nm;
- (ii) have an average particle diameter of no more than about 1,500 nm;
- (iii) have a density of at least about 4.5 g/cc;
- (iv) have a density of no more than about 6.0 g/cc;
- (v) have a Mohs hardness value of at least about 5;
- and
- (vi) have a Mohs hardness value of no more than about 7;
- wherein:
- (vii) the strontium titanate particles are present in the toner in an amount of at least about 0.1 percent by weight of the toner;
- and
- (viii) the strontium titanate particles are present in the toner in an amount of no more than about 1 percent by weight of the toner;
- wherein said strontium titanate particles do not adhere to the resin particles.
16 more elements
Dependencies are inferred from the claim text.