Coated carriers and processes thereof
AssigneeXerox Corporation
InventorsRobert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney
Life of this patent
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Abstract
A carrier comprised of a core and a polymer generated from a mixture of two latexes, and wherein the first latex enables a polymer with a high molecular weight, and the second latex enables a polymer with a low molecular weight, and wherein high represents a weight average molecular weight of from about 1,000,000 to about 8,000,000, and said low represents a weight average molecular weight of from about 500,000 to about 750,000.
Claims25
A carrier comprised of a core and a polymer coating generated from a mixture of two latexes, and wherein the first latex comprises a first polymer with a high molecular weight and the second latex comprises a second polymer with a low molecular weight, and wherein said high molecular weight represents a weight average molecular weight of from about 4,000,000 to about 10,000,000 and said low molecular weight represents a weight average molecular weight of from about 500,000 to about 750,000.
A developer comprised of (1) a carrier core and polymer coating layer thereover, and (2) a toner;
- and wherein said coating is generated from a mixture of at least two latexes, wherein the first latex comprises a first polymer with a high molecular weight, and a second latex comprises a second polymer with a low molecular weight;
- and wherein said high molecular weight represents a weight average molecular weight of from about 4,000,000 to about 10,000,000, and said low molecular weight represents a weight average molecular weight of from about 400,000 to about 800,000.
A process for forming a carrier comprised of a core and a polymer coating, comprising
- mixing and heating of two latexes to form a polymer mix;
- wherein one latex contains a polymer resulting from the polymerization of a monomer, which polymer possesses a weight average molecular weight of from about 4,000,000 to about 10,000,000, and wherein said second latex contains a polymer resulting from the polymerization of a monomer, which polymer possesses a weight average molecular weight of from about 400,000 to about 700,000;
- drying the polymer mix by spray drying or freeze drying;
- and
- coating core particles with the polymer mix, and heating said polymer mix coated core particles, to form a carrier.
Dependencies are inferred from the claim text.