Lamberti Spa

Montedison S.p.a.

Franco Federici

Giuseppe Li Bassi

Thierry Bossi

Giovanni Floridi

Luigi Merli

Pierangelo Pirovano

Ennio Cozzi

Giorgio Pin

Riccardo Vago

Christian Parisi

Dario Fornara

Gianmarco Polotti

Aldo Trovati

Arianna Benetti

Peter Bohus

Stefano Fumagalli

Jacopo Franchini

Gabriele Costa

Mattia Ossola

Gianfranco Paganini

Daniele Moro

Guiseppe Li Bassi

Vittorio Betti

The present invention concerns aqueous polymer compositions comprising a water soluble hydrophilic polymer with poly(ethylene oxide) content higher than 50% by weight and a polyacrylic thickener containing sulfonic groups. The aqueous polymer compositions of the invention are useful as deflocculants, rheology modifiers and water retention agents for paper coating compositions.

Aqueous polymer composition for paper coating

A method for reducing filtrate loss of oil based drilling fluids comprising the following steps: a) preparing by emulsion polymerization an aqueous dispersion containing: i) from 20% to 60% by weight of a copolymer comprising from 60% to 90% by weight of styrene and/or vinyltoluene monomers, from 7 to 40% by weight of 2-ethylhexyl acrylate monomers and from 0.01 to 3% of polyfunctional unsaturated monomers; ii) from 40 to 80% by weight of water; iii) from 0.1% to 5% by weight of at least one surfactant; b) providing an oil based drilling fluid containing the aqueous dispersion obtained from step a), or its copolymer in powder form; c) injecting and circulating the drilling fluid in the borehole.

Method for reducing filtrate loss from oil based drilling fluids

Esters of alkanolamines with unsaturated, polyunsaturated or saturated C-Cmonocarboxylic acids are additives for reducing accretion on drilling equipment (anti-accretion agents) to be used in drilling muds during drilling and completion of oil and gas wells.

Anti-accretion agents for drilling fluids

Paper coating compositions contain specific polyethers which are obtained by reacting a diglycidyl ether with a water soluble polyol containing at least one polyoxyethylene chain acting as deflocculants, water retention agents and gloss enhancers.

Paper coating compositions

Disclosed are inverse emulsions for the preparation of cosmetic formulations wherein the weight ratio between the aqueous phase and the organic phase is from 4:1 and 2:1 and containing Ron 20 to 70% buy weight of an acrylic polymer obtained by inverse emulsion polymerisation of from 55 to 75% by weight of an anionic acrylic monomer containing a strongly acidic functional group; Ron 0.1 to 5% by weight of a cationic acrylic monomer if the formula (I). Wherein Ris hydrogen or methyl; R, R, Rare, one independently of the others, hydrogen or C-Calkyl; Y is NH or O; A is a C-Calkylene; from 25 to 45% by weight of a C-Canionic acrylic monomer containing a carboxylic group. Also disclosed is the procedure for their preparation. 

Synthetic thickeners for cosmetics

High-functionality compositions based on fluorinated and silanized polyisocyanates, prepared by reacting a hydroxy-terminated perfluoropolyether having an average molecular weight ranging from 500 to 7000 and a silico-carbinol having an average molecular weight ranging from 500 to 7000, with an organic diisocyanate and a polyol having a functionality of at least 3. Varnishes containing said compositions based on fluorinated and silanized polyisocyanates, having a high functionality.

High-functionality compositions based on fluorinated and silanized

Highly functional fluorinated polyisocyanates of the formula: ##STR1## wherein Z.sub.1 represents the functional group --O--CO--NH--R--NCO;

Highly functional fluorinated polyisocyanates and varnishes obtained

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Busto Arsizio, Italy

Franco Federici