Abstract: The invention relates mainly to a polymer comprising a hydrocarbon-based main chain bearing carboxylic groups and polyalkoxylated chains and up to 4% by weight of anti-oxidant groups, relative to the weight of the final polymer, grafted to the main chain. It also relates to a method for preparing such a polymer and to an admixture which is of use as a plasticizer of suspensions of mineral particles comprising same. Finally, it is related to the use of such a polymer for fluidifying suspensions of mineral particles and reducing the water demand of hydraulic compositions.

Abstract: The invention relates mainly to a polymer comprising a hydrocarbon-based main chain bearing carboxylic groups and polyalkoxylated chains and up to 4% by weight of anti-oxidant groups, relative to the weight of the final polymer, grafted to the main chain. It also relates to a method for preparing such a polymer and to an admixture which is of use as a plasticizer of suspensions of mineral particles comprising same. Finally, it is related to the use of such a polymer for fluidifying suspensions of mineral particles and reducing the water demand of hydraulic compositions.

Abstract: Free-flowing, non-agglomerating and attrition resistant, substantially spherical solid beads/spherules of a coumarin compound, advantageously having a particle size ranging from 100 .mu.m to 2,000 .mu.m, a loose bulk density ranging from 0.25 to 0.8 and a compressive strength ranging from 500 to 10,000 N/m.sup.2, dissolve rapidly in ethanol and are conveniently prepared by prilling/fragmenting a melt of the coumarin compound into a stream of a cooling gas.

Abstract: An oil-in-water emulsion is passed through a nozzle to form spherules which are allowed to fall countercurrent to a flow of cold air and which are recovered utilizing either a liquid crosslinking agent or a solution, preferably aqueous, optionally containing a crosslinking agent.

Abstract: Process for the preparation of pearls based on a pharmaceutical active substance exhibiting an indefinite crystallization point.The said active substance is mixed in molten form with a pharmaceutical excipient promoting the solidification of the active substance, the melt is forced to pass through a nozzle which is subjected to a vibration, the pearls formed are allowed to fall in a tower countercurrentwise to a gas, and the pearls formed are collected in the bottom of the tower.

Abstract: Process for the preparation of pearls based on a pharmaceutical active substance exhibiting an indefinite crystallization point. The said active substance is mixed in molten form which a pharmaceutical excipient promoting the solidification of the active substance, the melt is forced to pass through a nozzle which is subjected to a vibration, the pearls formed are allowed to fall in a tower countercurrentwise to a gas, and the pearls formed are collected in the bottom of the tower.