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US 6,787,279 B2Granted
Random copolymers used as compatibilizers in toner compositions
AssigneeLexmark International, Inc.
InventorsBryan Patrick Livengood, George P. Marshall, John Melvin Olson
Life of this patent
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Abstract
The present invention is a random copolymer and its use to compatibilize the components of mixtures of immiscible polymeric materials used in the preparation of toner formulations.
Claims1
In a toner composition comprising about 100 parts of a styrene/acrylic random copolymer base resin and about 3 parts of a polyethylene wax additive, the improvement comprising:
- said composition including a high number-average molecular weight random copolymer compatibilizer present in said toner composition at a level that is about 1.5 weight percent relative to the weight of said styrene/acrylic random copolymer, wherein said compatibilizer comprises 81 weight percent ethylene and 19 weight percent n-butyl acrylate monomer units.
Dependencies are inferred from the claim text.