Patent ID: 9458322
Filing Date: 2016-10-04
CPC Classification: A61K,B82Y,C09B

Claim Text:
1. A process for forming a nanoparticle-based clathrate pigment composition, consisting of the steps of: preparing a high viscosity, structured fluid matrix by heating a concentrated acid medium consisting essentially of polyphosphoric (superphosphoric 105%) acid, sulfuric acid (80 wt. % aq.), or glyoxylic acid (50% aq.) or mixtures thereof, with agitation, and adding a host vessel molecule comprising a carbohydrate that is amylose, maltodextrin or cyclodextrin, with agitation, to the acid medium, adding a solid guest particle that is a pigment, with agitation, to the structured fluid matrix to form a mixture, stirring the mixture at an elevated temperature for a set period of time to allow for particle size reduction and annealing of the added solid quest particles as they become physically trapped within the host vessel molecule, quenching the mixture, and separating unreacted host vessel molecules from the mixture to obtain a stabilized lower viscosity colloidal dispersion of nanoparticle-based clathrates comprising the solid guest particle pigment within the host vessel molecules of the structured fluid matrix, wherein the particle size of the clathrate achieved by the process is less than about 600 nanometers.