Imperial Chemical Industries Limited

Jozef Nemcek

Martyn Humphries

Joseph F Jaworzyn

John B Cantwell

John J Gerrard

John Christopher Padget

Thomas A Roberts

Edward Charles Dart

Christopher C Mollett

James Rodney Traynor

Francis R Sherliker

Nicholas Heap

Antony R Perry

Neil B Graham

Roger C Roberts

Oral hygiene compositions effective for preventing the adherent deposition of cariogenic bacteria on teeth comprise as active constituents polymers having defined repeating units comprising hydrocarbyl groups with pendant carboxyl and pendant polyalkylene oxide groups in defined ratio. The polymers themselves, their preparation, and a process for treating teeth with the compositions are also claimed.

Oral hygiene compositions and polymers active therein

Oral hygiene compositions effective for preventing the adherent deposition of cariogenic bacteria on teeth comprise as active constituents polymers having defined repeating units comprising hydrocarbyl groups with pendant carboxyl and pendant polyalkylene oxide groups in defined ratio. The polymers themselves, their prepartion, and a process for treating teeth with the compositions are also claimed.

Coating composition suitable for treating a surface so as to provide water-erodible coating thereon, which composition comprises at least one erodible polymer comprising one or more hydrolysable groups selected from sulphonate esters and sulphonate esters which in an aqueous environment will generate by hydrolysis corresponding polymer-bound acid groups. The erodible polymers are described in detail and a method of treating surfaces using the composition is described.

Surface treatment with sulfonate ester polymer

Coating composition suitable for treating a surface so as to provide a water-erodible coating thereon, which composition comprises at least one erodible polymer comprising one or more hydrolysable groups selected from sulphonate esters and sulfphonate esters which in an aqueous environment will generate by hydrolysis corresponding polymer-bound acid groups. The erodible polymers are described in detail and a method of treating surfaces using the composition is described.

Compositions of polymers with sulfphate and/or sulfphonate groups

A polymerizable composition is formed from (a) a polymerizable olefinically unsaturated substance, (b) a phosphorus oxyacid and an organic amine, at least one of which bears a polymerizable olefinically unsaturated group and optionally (c) a particulate inorganic material. Such compositions are useful in dental applications.

Polymerizable composition comprising (a) phosphorus oxyacid (b) amine

Dispersions of colloidal siliceous particles, preferably silica, may be prepared in organic liquids by means of a synergistic mixture of dispersing agents comprising a phosphorus oxy-acid derivatives and a long-chain amine. Dispersions containing a high weight fraction of siliceous solids are possible having a lower viscosity than is normally achieved.

Dispersions of siliceous solids in liquid organic media

A polymeric composition which is capable of being shaped and which preferably is in the form of a sheet, the composition being formed by partially reacting a mixture of

Photopolymerizable composition comprising .alpha.,.alpha.diketone

Photocurable dental filling compositions

A photopolymerizable composition comprising a polymerizable ethylenically unsaturated material and a photosensitizer, said photosensitizer being an addition product of an organic 1,2,3-triketone and an organic alcohol or organic mercaptan, said addition product having the formula ##EQU1## or ##EQU2## where the groups R and R.sub.1 may be same or different and each is a hydrocarbyl group or a substituted hydrocarbyl group or the groups R when taken together form part or the whole of a cyclic structure.

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Cheshire, United Kingdom

Jozef Nemcek