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US 5,944,853 AGranted
Method for preparing halotriazine dye- and vinyl sulfone dye-monomer compounds
AssigneeJohnson & Johnson Vision Products, Inc.
InventorsFrank F. Molock, James D. Ford, Gregory A. Hill, Joe M. Wood
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Abstract
A highly purified monomer-dye unit is disclosed. A method for producing a highly purified monomer-dye unit is also disclosed. A hydrophilic monomer is reacted with a halotriazine or vinyl sulfone dye in the presence of a base under conditions that yield highly pure monomer-dye units.
Claims24
A method of preparing a monomer-dye compound, comprising the steps of:
- forming an aqueous solution comprising water and water-soluble reagents, said reagents comprising water-soluble hydrophilic monomer, water-soluble base, and water-soluble halotriazine dye;
- reacting said water-soluble dye with said water-soluble hydrophilic monomer to form a monomer-dye compound, wherein said monomer-dye compound is insoluble in said aqueous solution;
- and separating said monomer-dye compound from said solution comprising said water-soluble reagents.
A method of preparing a monomer-dye compound, comprising the steps of:
- forming an aqueous solution comprising water and water-soluble reagents, said reagents comprising water-soluble base, water-soluble hydrophilic monomer, and water-soluble vinyl-sulfone dye;
- reacting said water-soluble dye with said water-soluble hydrophilic monomer to form a monomer-dye compound, wherein said monomer-dye compound is insoluble in said aqueous solution;
- and separating said monomer-dye compound from said solution comprising said water-soluble reagents.
A monomer-dye compound formed by a method comprising the steps of:
- forming an aqueous solution comprising water and water-soluble reagents, said reagents comprising water-soluble hydrophilic monomer, water-soluble base, and water-soluble halotriazine dye;
- reacting said water-soluble dye with said water-soluble hydrophilic monomer to form a monomer-dye compound, wherein said monomer-dye compound is insoluble in said aqueous solution;
- and separating said monomer-dye compound from said solution comprising said water-soluble reagents.
A monomer-dye compound formed by a method comprising the steps of:
- forming an aqueous solution comprising water and water-soluble reagents, said reagents comprising water-soluble base, water-soluble hydrophilic monomer;
- and water-soluble vinyl-sulfone dye;
- reacting said water-soluble dye with said water-soluble hydrophilic monomer to form a monomer-dye compound, wherein said monomer-dye compound is insoluble in said aqueous solution;
- and separating said monomer-dye compound from said solution comprising said water-soluble reagents.
1 more element
Dependencies are inferred from the claim text.