Phase change ink formulation using urethane isocyanate-derived resins, a polyethylene wax and toughening agent
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United States of America Patent
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Feb 22, 2000
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app pub date -
Feb 13, 1998
filing date -
Jun 28, 1996
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Abstract
Urethane resins are made by reacting selected nucleophiles, such as alcohols including a hydroxyl containing toughening agent, with an isocyanate. A colored urethane resin is combined to form a phase change ink. The order of addition of the isocyanate and the different nucleophiles can tailor the distribution of di-urethane and mixed urethane/urea molecules in the final resin product. The isocyanate-derived resin materials are useful as ingredients as phase change ink carrier compositions used to make phase change ink jet inks.
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