Photochromic core and shell matrix
AssigneeXerox Corporation
InventorsDaniel A. Foucher, Jaan Noolandi, James H. Sharp
Life of this patent
Estimating the term…
Abstract
Disclosed is a composition comprising a matrix which comprises particles comprising a core resin and a shell resin thereover, wherein at least one of the core resin and the shell resin contains a chelating agent and a spiropyran compound of the formula wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, wherein the shell resin is the continuous phase of the matrix, wherein the spiropyran compound can produce changes in the optical and photoactive properties of the resin containing the spiropyran when irradiated.
Claims22
A composition comprising a matrix which comprises particles comprising a core resin and a shell resin thereover, wherein at least one of the core resin and the shell resin contains a chelating agent and a spiropyran compound of the formula
- wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, wherein the shell resin is the continuous phase of the matrix, wherein the spiropyran compound can produce changes in the optical and photoactive properties of the resin containing the spiropyran when irradiated.
A matrix composition which comprises (a) a discrete phase comprising an ordered array of core particles containing a first resin, and (b) an annealed continuous phase comprising a second resin, wherein at least one of the first resin and the second resin contains a chelating agent and a spiropyran compound of the formula
- wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, wherein if the spiropyran compound is irradiated then the optical properties of the resin containing the spiropyran compound change.
A process which comprises (a) organizing into an array particles comprising a core resin and a shell resin, wherein at least one of the core resin and the shell resin contains a chelating agent and a spiropyran compound of the formula
- wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2;
- and (b) heating the array to cause the shell resin to melt, partially flow, then harden on cooling, to fix the particles into a storage medium comprising the particles as a discrete phase and the shell resin as a continuous phase.
A process which comprises fusing an array of particles comprising a core resin with a shell resin thereover to fix the particles into a matrix, wherein at least one of the core resin and the shell resin contains a chelating agent and a spiropyran compound of the formula
- wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, and wherein the core resin comprises a discrete phase and the shell resin comprises a continuous phase of the matrix.
Dependencies are inferred from the claim text.