E.i. Dupont De Nemours and Company

Dennis S Donald

Wilson Tam

Jerald Feldman

Lynda Kaye Johnson

Stephan James McLain

Yueli Wang

Edward Bryan Coughlin

Kristina Ann Kreutzer

Ross A Lee

Anju Parthasarathy

Alison Margaret Bennett

Xing Shen

Lissa Taka Nelson

Sheau-Hwa Ma

Walter R Hertler

Dominic M Chan

Ludovic Fodor

Richard Beckerbauer

John R Shock

Glenn M Russo

Peter K Sysak

Frederick Claus Zumsteg, Jr

William R Pangratz

Julie C Bishop

Gerald R Meredith

The present invention relates to block copolymer dispersants comprising a hydrophobic block and a hydrophilic block having at least one polymerized monomer including a primary amine functionality. The inventive block copolymer dispersant is used to make aqueous dispersants such as inks that have enhanced paper binding characteristics.

Inks with enhanced substrate binding characteristics

Disclosed herein is a process for the polymerization of ethylene, norbornenes and styrenes, by contacting in solution a selected nickel compound and a selected compound which is or can coordinated to the nickel with the olefin(s). The polymers produced are useful for films and molding resins.

Olefin polymerization process

A process of developing exposed silver halide elements comprises developing said element in a developer in the presence of a development accelerator compound as defined. The development accelerator compounds include pyridinium, or pyridinium and and imidazolium compounds. The process is applicable to standard and hydrazine-containing films and to hydroquinone and/or ascorbic acid-based developers. The development accelerator may be incorporated into the developer or into the silver halide emulsion.

Process for rapid access development of silver halide films using

Novel organic glass compositions are disclosed which are poled to achieve nonlinear optical properties. Novel compounds useful for making said poled compositions are also disclosed; as are a method and a device for transforming electromagnetic radiation using a nonlinear optical element formed from said compositions; and certain intermediates for making novel compounds.

Nonlinear optical materials

Optical elements comprising noncentrosymmetric crystalline organic compounds are provided, that are capable of second harmonic generation. The invention further provides for nonlinear optical devices and modulators incorporating the optical elements.

Organic optical elements and nonlinear optical devices

A photoimaging system and method for photoimaging employing said photoimaging system, the latter comprising (i) a photosensitive element having a substrate coated with a photosensitive layer containing dispersed silver halide particles in operative association with a continuous film-forming phase of polymeric coupler, the coupler characterized by the ability to couple with the developing agent of component (ii) to become insoluble in aqueous media; and (ii) an oxidized hydroquinone or aminophenol-type developing agent.

Tanning development in low silver photoimaging using polymeric couplers

Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

Phenylmercaptotetrazolo- and nitroindazolo masked development/image

Masked development/image modifier compounds of silver photographic

Photopolymerizable coating compositions which contain an ethylenically unsaturated polymerizable compound and a radiation sensitive, free-radical generating system are thermally stabilized to inhibit polymerization at elevated temperature without affecting room temperature photopolymerization by adding to the composition a bis(substituted amino)monosulfide or bis(substituted amino)polysulfide.

Bis(substituted amino)sulfides as reversible inhibitor sources for

Method of controlling plant diseases, particularly late blight and apple scab, with aminodicyanopyrazines, such as 2-t-butylamino-3-chloro-5,6-dicyanopyrazine; and agricultural compositions containing these compounds.

Aminodicyanopyrazines for controlling plant disease

Diimidazopyrazines of the formula: ##SPC1## Wherein R.sup.1 and R.sup.2 are selected from the group consisting of lower alkyl and aryl of 6 to 12 carbons which may be optionally substituted are described. These compounds are useful as brightening agents. They are prepared from tetracarboxamidopyrazines of the formula: ##SPC2## Wherein the R's are as specified above for R.sup.1 and R.sup.2.

Diimidazopyrazines and tetracarboxamidopyrazines

An improved method for the preparation of 3,5-diaminopyrazinoic acid (which is useful for the manufacture of diuretics) is described. New compounds obtained in the process include 3,5-diamino-2,6-dicarbamoylpyrazine; 3.5-diamino-6-carbamoylpyrazinoic acid and 3,5-diamino-6-carbamoylpyrazine. The latter compounds are also useful as curing agents for epoxy resins.

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Mendenhall, PA, United States of America

Dennis S Donald