US 11,447,640 B2 · Encapsulated materials with improved properties

Abstract

Described herein are polymer-encapsulated materials and a method for encapsulating materials with polymer via emulsion polymerization. The encapsulated materials include colorants (e.g., pigments and dyes, and in particular fluorescent dyes), optical brighteners, downconverters and upconverters. The encapsulated materials are produced by the emulsion polymerization of ethylenically unsaturated monomers. The polymer-encapsulation method described herein does not require the preparation of a miniemulsion homogenized with special equipment, such as an ultrasonification device, and the resulting polymer-encapsulated materials exhibit optical properties superior to polymer-encapsulated materials prepared by processes that include the preparation of a miniemulsion prepared with such special equipment, such as an ultrasonification device.

Claims20

Dependent claims

An encapsulated light emitting material comprising:

a light emitting material and
a polymer material encapsulating the light emitting material, wherein the encapsulated light emitting material is produced by emulsion polymerization:
i) in an emulsion polymerization medium formed from:
a) a solution of the light emitting material in a water miscible solvent and
b) an aqueous solution of surfactants;
ii) in a process that does not employ a miniemulsion;
and
wherein the encapsulated light emitting material exhibits an increased intensity of at least 5% over an encapsulated light emitting material produced in an emulsion polymerization that employs a miniemulsion procedure.

5 more elements

Dependencies are inferred from the claim text.

Encapsulated materials with improved properties

Life of this patent

Encapsulated materials with improved properties

Life of this patent

Abstract

Claims20