Commissariat a L'energie Atomique

Versalis S.p.a.

Nec Corporation

Commissariat a L'energie Atomiguie

Alessandro Casnati

Marcello Notari

Rocco Ungaro

Francesco Sansone

Alessandro Burlini

Alberto Roselli

Claudio Cavallo

Jean-Francedillaois Dozol

Yoshitake Ohnishi

Giulio Assanelli

Jun-ichi Fujita

Jean-Fran&ccedil;ois Dozol

Andrea Pochini

Jacques Vicens

Zouhair Asfari

Helene Rouquette

Veronique Lamare

Christophe Bressot

Arturo Arduini

Andrea Magini

There are mixtures containing calixarenes of formula (I) with a reduced alkyl phenol and linear oligomer content and a preparation process thereof: wherein: Furthermore, there are detergent compositions containing overbased metal salts of calixarenes, a preparation process thereof, and a use thereof in lubricant compositions.

Mixture containing calixarenes, process for the production thereof and use thereof for preparing detergent compositions for lubricants

Hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from: &#x2014;hydrogenated homopolymers or co-polymers of conjugated dienes; or&#x2014;hydrogenated co-polymers of said conjugated dienes and monoalkenyl arenes, and&#x2014;mixtures thereof said formula (I) in which: &#x2014;R, R, Rand Rare independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms; &#x2014;one of the two substituents Rand Ris hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6, preferably methyl and ethyl; &#x2014;n is an integer in the range between 4 and 16. 

Hydrogenated polymers with a radial structure having a core based on calixarenes and use thereof in lubricant compositions

The present invention relates to a metal compound of calixarene not containing sulfur and dispersible in oil, which can be partially salified, or neutral, or basic or overbased, said calixarene having general formula (I) in which: a) R, R, Rand Rare independently selected from hydrogen, or a group containing carbon and hydrogen, or a group containing in addition to carbon and hydrogen also heteroatoms, provided that said heteroatoms are not sulfur; b) one of the two substituents Rand Ris hydrogen, while the other may be selected from hydrogen, or a linear or branched alkyl with a number of carbon atoms between 1 and 6, preferably methyl, ethyl, 1-propyl, 2-propyl, n-butyl, sec-butyl, more preferably methyl or ethyl; c) n is the number of units of the calixarene ring and is comprised in the range between 4 and 16, preferably between 5 and 12; said calixarene being characterized in that in at least one of the n units of the calixarene ring, at least one of the substituents R, R, Rand Rcontains at least one acid group of carboxylic type available for the reaction with a metal base, with the proviso that said acid group of carboxylic type is not contained in a unit of the calixarene ring derived from salicylic acid. 

Metal compounds of calixarenes, detergent compositions containing them and use thereof in lubricant compositions

Hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from: &#x2014;hydrogenated homopolymers or copolymers of conjugated dienes; or &#x2014;hydrogenated copolymers of said conjugated dienes and monoalkenyl arenes, and &#x2014;mixtures thereof said formula (I) in which: &#x2014;R, R, Rand Rare independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms; &#x2014;one of the two substituents Rand Ris hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6, preferably methyl and ethyl; &#x2014;n is an integer in the range between 4 and 16. 

Calixarene acetamido derivatives, preparation and use thereof for extracting strontium

Crown calix[4]arenes, method of preparation and use for selective

Crown calix .vertline.4.vertline. arenes, their preparation process and

A resist film consisting of 5,11,17,23,29,35-hexachloromethyl-37, 38,39,40,41,42-hexamethoxycalix�6!arene sensitive to a high-energy beam and soluble to a solvent is formed on a substrate etchable by a dry etching, has a selective region thereof exposed to the high-energy beam, with a remaining region unexposed thereto, and developed to define a pattern on the substrate, as the remaining region is removed by the solvent, before the substrate with the pattern is subjected to the dry etching. A nanometric patterning and etching is permitted, with a reduced process time.

Ultrafine pattern forming method and ultrafine etching method using

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Parma, Italy

Alessandro Casnati