Abstract: Thermal and/or acoustic insulation product based on mineral fibers, obtained by internal centrifugation and attenuation by a high-temperature gas stream and by crimping, characterized in that it contains no devitrified and/or defiberized particles, the length of the fibers is at most equal to 2 cm, preferably less than 1.5 cm, and the fibers have a micronaire per 5 grams of less than or equal to 4, especially between 2.5 and 4, or a micronaire of less than or equal to 18 l/mim, especially between 11 and 15 l/mim, in particular around 12 to 13 l/mim.

Abstract: The present invention relates to a device for the internal centrifugation of fine mineral fibres, a method for forming fine mineral fibres, and paper containing fine mineral fibres.

Abstract: A compound of formula (I): ##STR1## In which: R.sub.1 represents linear or branched (C.sub.1 -C.sub.6) alkyl,X represents oxygen or sulfur,R.sub.2 represents optionally substituted alkyl, alkoxy, optionally substituted phenyl, optionally substituted cycloalkyl, 4-(2,3-dithiacyclopent-1-yl)butyl, pyridyl or optionally substituted amino or any one of the groups as defined in the description,R.sub.3 represents hydrogen or cycloalkyl, formyl, optionally substituted phenyl, pyridyl or optionally substituted alkyl,the isomers thereof, the addition salts thereof with a pharmaceutically acceptable acid or base, and medicinal compounds containing them are useful for the treatment of chronic or cellular ischemia.

Abstract: The invention relates to a novel process for the preparation of acyl isocyanates which consists in reacting oxalyl chloride with an N-trialkylsilylcarboxamide or an N,N-bis(trialkylsilyl)carboxamide.The process makes it possible to obtain acyl isocyanates in good yield, in particular acyl isocyanates derived from aliphatic amides, and under simplified reaction conditions.

Abstract: A process and apparatus for controlling the manufacture of mineral fibers, in particular glass fibers, by use of a fiber-drawing process using internal centrifuging in a centrifuger. The peripheral strip is pierced by a large number of outlet orifices and the radiation emitted superficially by the peripheral strip is measured in order to determine the temperature of points of the peripheral strip and the vertical coordinate of each of the points measured.

Abstract: A fibrous mineral material serving as an absorbent, especially for hygienic products such as diapers, sanitary napkins, bandages and similar products, is comprised at least partially of these mineral fibers, which have a specific surface area greater than 0.25 m.sup.2 /g. The material has an appreciably greater absorption capacity than the regularly-used cellulose fluff-based products.