Electrophotographic composition
AssigneeHP Indigo B.V.
InventorsGuy Nesher, Getahun Biadglin, Haim Cohen, Tony Azzam, Samer Farran, Ilanit Mor, Noam Parvin, Albert Teishev
Life of this patent
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Abstract
The present disclosure relates to an electrophotographic composition that comprises a polymer resin mixture and a liquid carrier. The polymer resin mixture comprises (i) an olefin polymer A having acid and/or ester side groups and a melt index of 22 to 100 g/10 min; and (ii) an olefin polymer B having a melt index of 1 to 20 g/10 min. The olefin polymer B forms 1 to 50 weight % of the polymer resin mixture.
Claims18
A liquid electrophotographic varnish composition consisting of:
- a polymer resin mixture consisting of:
- (i) an olefin polymer A having acid and/or ester side groups and a melt index of 22 to 100 g/10 min, wherein the olefin polymer A forms 50 to 99 weight % of the polymer resin mixture or a blend of olefin polymers A;
- and
- (ii) an olefin polymer B, wherein the olefin polymer B is a terpolymer of a) an olefin, b) an acrylic acid, methacrylic acid, an acrylate, or methacrylate, and c) a polar monomer selected from the group consisting of glycidyl methacrylate and maleic anhydride, wherein the olefin polymer B has a melt index of 1 to 20 g/10 min, and wherein the olefin polymer B forms 1 to 50 weight % of the polymer resin mixture;
- and
- a liquid carrier.
A method of forming a liquid electrophotographic varnish composition, said method comprising:
- melting (i) an olefin polymer A having acid and/or ester side groups and a melt index of 22 to 100 g/10 min;
- and (ii) an olefin polymer B to form a polymer resin mixture, wherein the olefin polymer B is a terpolymer of a) an olefin, b) an acrylic acid, methacrylic acid, an acrylate, or methacrylate, and c) a polar monomer selected from the group consisting of glycidyl methacrylate and maleic anhydride, wherein the olefin polymer B has a melt index of 1 to 20 g/10 min, and wherein the olefin polymer A forms 50 to 99 weight % of the polymer resin mixture and the olefin polymer B forms 1 to 50 weight % of the polymer resin mixture;
- allowing the polymer resin mixture to cool;
- grinding the polymer resin mixture to form particles consisting of the olefin polymer A and the olefin polymer B;
- and
- dispersing the particles in a liquid carrier to form the liquid electrophotographic varnish composition consisting of the particles and the liquid carrier.
Dependencies are inferred from the claim text.