Liquid toner with additives for enhancing life of intermediate transfer members
AssigneeHewlett-Packard Development Company, L.P.
InventorsBenzion Landa, Albert Teishev, Michael German
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Abstract
A liquid toner or toner concentrate comprising: pigmented toner particles in an amount of 0.5% to 20% by weight; a carrier liquid comprising: a liquid hydrocarbon; a silicone based additive; and a charge director, wherein the silicone based additive comprises a release life enhancer additive chosen from the group consisting of: a liquid silicone material having a viscosity of at least 5,000 centistokes; a silicone gum; a silicone surfactant; and a non-reactive silicone fluid.
Claims20
A liquid toner composition or toner concentrate composition comprising:
- (A) pigmented toner particles in an amount of 0.5% to 20% by weight;
- (B) a carrier liquid comprising a liquid hydrocarbon;
- (C) a silicone based additive;
- (D) a charge director;
- and
- (E) wherein the silicone based additive comprises a liquid silicone material having a viscosity at 25° C. of at least 350,000 centistokes.
A liquid toner composition or toner concentrate composition comprising:
- (A) pigmented toner particles in an amount of 0.5% to 20% by weight;
- (B) a carrier liquid comprising a liquid hydrocarbon;
- (C) a silicone based additive;
- (D) a charge director;
- (E) wherein the silicone based additive comprises a liquid silicone material having a viscosity at 25° C. of over 5,000 centistokes;
- and
- (F) wherein the silicone based additive is present in a ratio of between 0.005% to 0.01%, by weight to carrier liquid.
A liquid toner composition or toner concentrate composition comprising:
- (A) pigmented toner particles in an amount of 0.5% to 20% by weight;
- (B) a carrier liquid comprising a liquid hydrocarbon;
- (C) a silicone based additive, wherein the silicone based additive comprises a release life enhancer which is a silicone gum;
- and
- (D) a charge director.
A liquid toner composition or toner concentrate composition comprising:
- (A) pigmented toner particles in an amount of 0.5% to 20% by weight;
- (B) a carrier liquid comprising a liquid hydrocarbon;
- (C) a silicone based additive;
- (D) a charge director;
- (E) wherein the silicone based additive comprises a release life enhancer selected from the group consisting of:
- (a) a liquid silicone material having a viscosity at 25° C. of over 5,000 centistokes;
- (b) a silicone gum;
- and
- (c) an alkyl modified non-reactive silicone fluid present in a ratio of between 0.01% and 2%, by weight to carrier liquid;
- and
- (F) a defoaming agent.
Dependencies are inferred from the claim text.