 Benzophenone ether esters and use thereof to improve the light fastness of polyester dyeings |
| We claim: 1. A process for dyeing textile polyester material with disperse dyes in the presence of ... |
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| Powdered hair dye containing cyclodextrin inclusion complex |
| What is claimed is: 1. A powdered hair dye comprising in admixture an oxidative dye component and ... |
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| Dispersants resistant to color change |
| OF THE INVENTION The instant invention is based on the discovery that, in block copolymers of the ... |
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| Transfer imaging system |
| Thus, a principal object of the present invention is to provide an imaging system in which images ... |
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| Aqueous liquid dye composition of C.I. reactive blue ZI and caprolactam or N-methyl pyrrolidone |
| What is claimed is: 1. A method for enhancing storage stability when storing an aqueous liquid dye ... |
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| Stabilization of tetrazolium salts with cyclodextrins |
| What is claimed is: 1. In a process for stabilizing a tetrazolium salt used as a color indicator in ... |
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| Light-responsive material containing a dye comprising two cyclodextrin groups |
| OF THE INVENTION The present invention provides a light-responsive material comprising a dye ... |
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| Leukotriene antagonists and use thereas |
| AND PREFERRED EMBODIMENT The present invention relates to new organic compounds that are useful in ... |
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Diffusion or sublimation transfer imaging system
| Details |
Inventors: Patel, Ranjana C.; Stibbard, John H. A.; Fisher, Michael G.; Baldock, Terence W.;
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Examiner: Schilling; Richard L.
Assistant Examiner:
Attorney, Agent or Firm: Sell; Donald M., Smith; James A., Litman; Mark A.
Images can be formed on a receptor sheet by transfer of a dye image. The positive dye image is formed by bleaching of dye with an iodonium ion. The positive dye image is then transferred by sublimation or diffusion onto a receptor sheet. |
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DETAILED DESCRIPTION We claim: 1.
A process for forming an image which comprises image-wise exposing to radiation of selected wavelength a carrier element comprising, as image forming components, in one or more imaging layers coated on a support a bleachable dye in reactive association with iodonium ion thereby bleaching the dye in exposed areas to form a positive image, and thereafter transferring the positive dye image to a receptor which is either a receptor layer present on the carrier or a separate receptor element by (i) heating the carrier element to a sufficient temperature to allow the dye image to sublime to the receptor thereby forming an image on the receptor, or (ii) providing a liquid medium between the positive dye image and receptor for a sufficient time to allow transfer of the dye image to the receptor.
2.
A process as claimed in claim 1, in which the iodonium compound has the general formula: ##STR42## in which: Ar.
sup.
1 and Ar.
sup.
2 independently represent carbocyclic or heterocyclic aromatic-type groups having 4 to 20 carbon atoms, or together with the iodine atom complete a heterocyclic aromatic ring, and A.
sup.
.
crclbar.
represents an anion which may be incorporated into Ar.
sup.
1 or Ar.
sup.
2.
3.
A process as claimed in claim 2, in which at least one of Ar.
sup.
1 and Ar.
sup.
2 includes a substituent --OR.
sup.
14 in which R.
sup.
14 represents a straight chain or branched chain alkyl group of at least 3 carbon atoms, optionally substituted with one or more groups selected from OH, OR.
sup.
15, (NR.
sup.
16.
sub.
3).
sup.
.
sym.
in which R.
sup.
15 and R.
sup.
16 represent alkyl groups or a group having a quaternary group at the end of the alkyl chain.
4.
The process of claim 1, in which the carrier element comprises cyan, magenta and yellow bleachable dyes, the element being constructed and arranged to allow even transfer of each dye.
5.
The process of claim 1, in which the dye and iodonium salt are present in one or more layers in a polymeric binder, the weight ratio of dye to iodonium salt being in the range of from 1:1 to 1:50 and the binder is present in an amount from 50 to 98% by weight of the total weight of binder, dye and iodonium salt
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Quantum Computing 
