E.i. Dupont De Nemours and Company

Commonwealth Scientific and Industrial Research Organisation

Other

Catherine Louise Moad

Ezio Rizzardo

Graeme Moad

Steven Dale Ittel

Lech Wilczek

Alexei Alexeyevich Gridnev

Charles T Berge

San Hoa Thang

Julia Krstina

Michael Fryd

Jeffery W Johnson

Thomas Robert Darling

John Chiefari

Albert Mau

Alexi A Gridnev

Roshan Mayadunne

Gerry Swiegers

Gerry Wilson

This invention relates to a process for controlling the architecture of copolymers of at least two unsaturated monomers, made by free-radical polymerization in the presence of a cobalt-containing chain transfer agent, including the control of molecular weight, degree of branching and vinyl end group termination, by varying at least one of the variables of molar ratio of monomers, their relative chain transfer constants, polymerization temperature and degree of conversion and amount of cobalt chain transfer agent; and polymers made thereby.

Catalytic polymerization process

The invention provides in one aspect a process for preparing a microgel by RAFT polymerizing in the presence of a RAFT chain transfer agent, one or more solvophobic monomers and one or more solvophilic monomers to form one or more block copolymers comprising one or more solvophobic blocks and one or more solvophilic blocks wherein the solvophobic block is insoluble in a dispersing medium and the solvophilic block is soluble in the dispersing medium. The block copolymer is dispersed in the dispersing medium to form micelles, which is then stabilized to form the microgel. The dispersing medium can be aqueous or lipophilic. The method of the present invention also permits one to encapsulate a wide variety of materials, such as pigments, dye molecules, and aluminum flakes used in metallized paints.

Process of microgel synthesis and products produced therefrom

Process for the synthesis of block polymers, homopolymers and copolymers of narrow polydispersity having formula (1) by contacting selected vinyl monomer(s), vinyl-terminated compound(s) and free radicals in which effective control of production of polymer is achieved by controlling the mole ratio of vinyl monomer(s), vinyl-terminated compound(s) and free radicals relative to one another; and polymers produced thereby

Polymer synthesis

Polymerization in aqueous media

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Sassafras, Australia

Catherine Louise Moad