Atofina

Elf Atochem S.a.

Arkema France

Arkema Inc.

Ceca S.a.

Christian Gancet

Bernard Boutevin

Rosangela Pirri

Jean-Philippe Gillet

Serge Nicolas

Tong Eak Pou

Jean-Louis Seris

Frederic Perie

Jean Lepetit

Nathalie Cuny

Monique Lescure

Didier Lauranson

Alfred Mirassou

Cédric Loubat

Claude Gavach

Bernard Guyot

Adrien Lapeyre

Yves Taupin

The present invention relates to a method of covering a metal article with a film formed from the melting of a thin layer of powder comprising: physically blending 99.8 to 97% by weight of at least one polyamide and 0.2 to 3% by weight of an inorganic biocide species consisting of a soluble ceramic in which silver ions are encapsulated to form a powder blend composition; contacting the metal article with said powder composition blend to form a thin layer of said powder on the article; melting the powder blend composition onto the metal article to form a thin coating film; and cooling the coated article; where the powder blend composition is free of zinc compounds.

Polyamide-based powder and its use for obtaining an antibacterial coating

A hydrophilic polymer with improved biodegradability and particular usefulness in detergent compositions contains units derived by polymerization from at least one monomers A bearing a carboxylic acid function or an equivalent function, units derived by polymerization from at least one monomers B bearing an electron-rich group or a function capable of introducing an electron-rich group into the main chain, and, optionally, units derived by polymerization from at least one monomers C which is copolymerizable with A and B, but is different from A and B. Examples of suitable monomers as monomers A include maleic anhydride, acrylic acid, methacrylic acid, itaconic acid, fumaric acid and maleic acid, and the salts thereof. Examples of suitable monomers as monomers B include butadiene, isoprene, chloroprene, dimethylbutadiene, cyclohexadiene, butadienecarboxylic acid, butadienedicarboxylic acid, acetylene, acetylenecarboxylic acid and acetylenedicarboxylic acid. Suitable monomers as monomers C include vinyl, acrylic and styrene monomers and derivatives thereof.

Polyacrylates with improved biodegradability

Novel biodegradable polymers consisting of a biodegradable core bound to at least two carboxylic polyacid-based branches via a bond capable of being broken by hydrolysis or by oxidation are described. Biodegradable detergent compositions containing such polymers are also described.

Detergent biodegradable polyacrylates

The preparation of a carboxylic ester by direct reaction of a carboxylic acid and an alcohol catalyzed by a sulphonic acid R&mdash;SO H is carried out in the presence of a solid comprising tertiary amine functions.

Preparation of carboxylic esters catalyzed by a sulphonic acid

Compositions which greatly diminish, or eliminate, unpleasant smells associated with the use of underwear and diapers are described. These compositions are composed of superabsorbent polymers of the p6lyacrylic type and of certain boron derivatives, in particular sodium tetraborate pentahydrate. The sanitary articles which incorporate these compositions do not develop unpleasant smells, ammoniacal or otherwise.

Super absorbent composition intended for the production of sanitary articles of the underwear, diaper or disposable diaper type which do not develop unpleasant smells

Purification of alkanesulphonic acids

The invention concerns a superabsorbent composition containing a superabsorbent polymer powder, for instance polyacrylic and a zeolite powder exchanged with metal cations with bactericidal properties, in particular with silver ions. The hygiene articles incorporating them do not give off nor develop unpleasant smells though soaked with corporeal liquids.

Superabsorbent composition for hygiene articles free from unpleasant smells

In order to remove the salts (in particular NH.sub.4 Cl) present in an aqueous sulphonamide solution (in particular CH.sub.3 SO.sub.2 NH.sub.2), the solution is subjected to a two-compartment electrodialysis. By maintaining the pH at a value below 7, the formation of ammonia is avoided. The demineralized solution can be concentrated in order to receover after crystallization, the sulphonamide.

Desalination of aqueous sulphonamide solutions

Regenerating of acids, particularly of strong organic acids, using

Compositions which greatly diminish, or eliminate, unpleasant smells associated with the use of underwear and diapers are described. These compositions are composed of superabsorbent polymers of the polyacrylic type and of certain boron derivatives, in particular sodium tetraborate. The sanitary articles which incorporate these compositions do not develop unpleasant smells, ammoniacal or otherwise.

Superabsorbent composition intended for the production of sanitary

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Lons, France

Christian Gancet