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US 7,645,558 B2Granted
Inkless reimageable printing paper and method
AssigneeXerox Corporation
InventorsTyler B. Norsten, Gabriel Iftime, Peter M. Kazmaier, Barkev Koshkerian, Naveen Chopra
Life of this patent
Estimating the term…
Abstract
An image forming medium includes a paper substrate and an imaging layer coated on or impregnated into a paper substrate, where the imaging layer is formed of an imaging composition that includes an alkoxy substituted diarylethene photochromic material dissolved or dispersed in a solvent or polymeric binder, and where the imaging composition exhibits a reversible transition between a colorless and a colored state.
Claims28
A photochromic material represented by the general formula (I)
- wherein:
- each X independently represents hydrogen, an alkyl chain having 1 to 20 carbon atoms, bromine, chlorine or an iodine atom,
- A represents a group of formula (a)-(c), and
- B represents a group of formula (d)-(f),
- wherein:
- R4 represents an aryloxy group, a substituted and unsubstituted heteroaromatic group, an alkoxy group, or a substituted alkoxy group, where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms,
- R5 represents an aryl group, a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group,
- R6 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group,
- R7 represents an alkyl group, an aryl group, an alkylaryl group including substituted alkylaryl groups, unsubstituted alkylaryl groups, and wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl,
- R8 represents an aryloxy group, substituted and unsubstituted heteroaromatic group, or an alkoxy group or substituted alkoxy group where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms,
- R9 represents an aryl group, a substituted or unsubstituted alkylaryl groups wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group,
- R10 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group,
- R11 represents an alkyl group, an aryl group, or a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl, and
- U and Z each independently represent sulfur or oxygen atoms.
11 more elements
A photochromic material represented by the general formulae (II), (III), (IV), (V), (VI), (VII)
- wherein:
- in formula (II), X represents S or O,
- in formula (IV), X represents S, O or C═O, and Y represents O, CH2 or C═O,
- in formula (V), Y represents CH2 or C═O,
- in formula (VI), X represents CH or N, and
- in formula (VII), Y represents CH2 or C═O,
- and wherein:
- A represents a group of formula (a)-(c), and
- B represents a group of formula (d)-(f),
- wherein:
- Rb 4 represents an aryloxy group, a substituted and unsubstituted heteroaromatic group, an alkoxy group, or a substituted alkoxy group, where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms,
- R5 represents an aryl group, a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group,
- R6 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group,
- R7 represents an alkyl group, an aryl group, an alkylaryl group including substituted alkylaryl groups, unsubstituted alkylaryl groups, and wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl,
- R8 represents an aryloxy group, substituted and unsubstituted heteroaromatic group, or an alkoxy group or substituted alkoxy group where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms,
- R9 represents an aryl group, a substituted or unsubstituted alkylaryl groups wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group,
- R10 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group,
- R11 represents an alkyl group, an aryl group, or a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl, and
- U and Z each independently represent sulfur or oxygen atoms.
16 more elements
Dependencies are inferred from the claim text.