Methods for producing photosensitive microparticles

US8563213B2 · kind B2 · utility

Assignee

• Transitions Optical, Ltd. · US

Inventors

• Steven Bowles · Pittsburgh, US
• Anu Chopra · Pittsburgh, US
• Randy E. Daughenbaugh · Monroeville, US
• Dennis L. Faler · Glenshaw, US
• M. Frank Haley · Glenshaw, US
• Paul H. Lamers · Allison Park, US
• Yunyi Lu · Monroeville, US
• Kevin J. Stewart · Murrysville, US
• Cathy A. Taylor · Washington, US
• Feng Wang · Export, US
• Elizabeth A. Zezinka · Oil City, US

Key dates

• Filing date: Mar 8, 2010
• Grant date: Oct 22, 2013
• Expiry date: Feb 25, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/105
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described are various methods of producing non-aqueous dispersions of photosensitive polymeric microparticles, comprising: (a) preparing one or more aqueous dispersions of a polymerizable component, at least one of which contains a photosensitive material and, wherein the polymerizable components comprise at least one hydrophilic functional group and/or at least one hydrophobic functional group; (b) subjecting the dispersion of (a) to conditions sufficient to form microparticles; (c) at least partially polymerizing the polymerizable component; (d) combining the dispersion with an organic continuous phase comprising an organic solvent; (e) removing water from the dispersion such that the final water content of the non-aqueous dispersion is less than 30 percent by weight; wherein e) is performed before or after d); and (f) reacting any acid functional groups on the surface of the microparticles with a reactive material having at least one epoxy functional group, at least one thiocarbonylthio functional group, at least one alkoxyamine functional group, or at least one halide functional group.