Imperial Chemical Industries Limited

Denis G Ballard

Ian M Shirley

Eric Jones

Graham R Rideal

Andrew Courtis

John Christopher Padget

Anthony Pickering

Peter J Runciman

Nicholas J Walton

Colin S Cundy

Peter Anthony Robinson

David L Twose

Kenneth T Moran

Rowena J Sellens

Paul A Holmes

William N Meredith

Robert T Murray

Dale A Laidler

John Walker

Ronald John Wyatt

Alan Nevin

Ronald Pearce

Jeffrey Farrar

Alexander Joseph Pioli

George Michael Jeffs

David M Haddleton

Adrian Walter Parkins

Richard M Charnah

Samuel Dimewere Ibekwe

John F Droughton

Michael Franz Lappert

David C Morley

A process for addition polymerization of vinylic (in particular methacrylic) monomers at a temperature in the range of -20.degree. to 60.degree. c., in the presence of a catalyst comprising:

Process for polymerizing methacrylic acid ester monomers

A catalyst for addition polymerization comprising

Catalysts

A catalyst for addition polymerization comprising:

A catalyst for addition polymerisation comprising

A process for the preparation of polymeric compositions which comprise novel polymers and copolymers of certain 1,2-disubstituted-cyclohexadienes, aromatization of such polymers in the form of inter alia fibers, and novel aromatic polymers.

Polymers with vinylic units and aromatic units

A process for the preparation of a polyphenylene layer which comprises the steps of treating a copolycyclohexa-3,4-diene under first conditions to aromatize a portion of the aromatic rings and then under second conditions to aromatize the residual cyclohexadiene rings from the first treatment.

Polyaromatics

A method for the preparation of 1-chloro-1,2,2,2-tetrafluoroethane which comprises treating 1,1-dichloro-1,2,2,2-tetrafluoroethane, optionally in the form of an isomer mixture, with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethane.

Preparation of 1-chloro-1,2,2,2-tetrafluoroethane

An electrically conducting composition is described which comprises a polyarylene, e.g. polyphenylene, and a suitable doping agent, e.g. ferric chloride. The polyarylene is prepared from a poly(1,2-disubstitutedcyclohexa-3,5-diene).

Conducting polymers

Vermiculite ore is contacted with an aqueous solution with at least one salt of sodium, lithium or an organosubstituted ammonium cation followed by aqueous washing so that the ore swells. The swollen vermiculite in aqueous suspension is subjected to a shearing action until a suspension containing vermiculite particles having dimensions less than 50 microns is produced with elimination from the suspension of all particles having a diameter larger than 50 microns. Water can then be removed from the suspension.

Production of articles from minerals

A process for the preparation of polymeric compositions which comprise novel polymers and copolymers of certain 1,2-disubstituted-cyclohexadienes, aromatization of such polymers in the form of inter alia fibres, and novel aromatic polymers.

Preparation of aromatic polymers from cyclohexa-3,5-diene polymers

Poly(1,2-disubstituted cyclohexa-3,5-dienes

A free-flowing, dry powder composition comprising vermiculite lamellae (delaminated vermiculite); preferably the composition contains a solid particulate additive such as magnesium oxide.

Dry powder compositions of vermiculite lamellae and additives

A composition comprising vermiculite lamellae (delaminated vermiculite) and one or more solid particulate materials which have a basic reaction in water, especially magnesium oxide. These particulate additives improve the physical properties of vermiculite articles especially the compressive strength and stability to water of foam.

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Littleton, United Kingdom

Denis G Ballard