Commonwealth Scientific and Industrial Research Organisation

Ici Australia Limited

Mervyn B Jackson

Brian A Bolto

Jonathan Howard Hodgkin

Wolfgang H Sasse

Kurt H Eppinger

John West Loder

A method for the preparation of a diaminobisimide compound of the formula (I) substantially free of oligomers: ##STR1## wherein Ar.sup.1 is an optionally substituted aromatic residue which provides for good conjugation between the nitrogen containing groups; and Ar is an optionally substituted aromatic residue characterized in that at least two molar proportions of an aromatic diamine of the formula (II)

Epoxy resins based on diaminobisimide compounds

A method for the preparation of diaminobisimide compounds of the formula (I) which are substantially free of oligomers and are useful as curing agents in epoxy resin formulations: ##STR1## wherein Ar.sup.1 is an optionally substituted aromatic residue which provides for good conjugation between the nitrogen containing groups; and Ar is an optionally substituted aromatic residue, comprising heating an aromatic diamine of the formula H.sub.2 N--Ar.sup.1 --NH.sub.2, with an aromatic tetracarboxylic acid of the formula (HOOC).sub.2 (COOH).sub.2 or the corresponding dianhydride.

Ion exchange resin

Making amphoteric thermally regenerable ion-exchange resins by encapsulating poly (weak acid) ion exchange particles in a matrix of a polymer of opposite ion-exchange type in the presence of certain agents which inhibit the formation of deleterious salts between the resins.

Matrix amphoteric thermally regenerable ion exchange resins

A process for demineralizing an aqueous saline solution containing a deoxygenating agent by treating it with a thermally regenerable ion-exchange resin comprising a resinous material derived from a substituted diallylamine.

Process for demineralizing saline solutions

A process of manufacturing an amphoteric composite resin which process comprises first polymerizing a dispersion comprising two liquid phases wherein the first liquid phase comprises at least one monomer containing a basic group or a precursor or derivative thereof and a crosslinking agent, and the second liquid phase comprises at least one monomer containing an acidic group or a precursor or derivative thereof and a crosslinking agent, and wherein the monomers are not of opposite charge, the two liquid phases are substantially immiscible and partitioning of the monomers from one liquid phase to the other is minimal, to form a composite polymeric material; and second treating the composite polymeric material to convert any acidic group precursor or derivative and any basic group precursor or derivative to the free acid and free base respectively to form an amphoteric composite resin.

Amphoteric composite resins and method of preparing same by

A method of polymerizing a composition comprising a mixture of monomers said monomer mixture containing a major proportion of an unsaturated carboxylic acid and a minor proportion of a crosslinking agent which method comprises irradiating a said mixture of monomers in a nonpolar and nonhydroxylic solvent with electromagnetic radiation having a wavelength greater than 180 nanometers and preferably less than 800 nanometers preferably in the presence of a photosensitive initiator, hereinafter referred to as a sensitizer, at a temperature in the range from 10.degree. C to 90.degree. C, the concentration of unsaturated carboxylic acid being less than 20% w/v, and isolating the polymer so formed.

Process of preparing microspheres using electromagnetic radiation

A resin comprising a copolymer of an unsaturated benzoin or unsaturated benzoin alkyl ether and a neutral or basic derivative of an unsaturated carboxylic acid, said copolymer having grafted onto it an allylamine.

Growing community of inventors

West Brunswick, Australia

Mervyn B Jackson