Abstract:
Tire comprising at least one structural element including a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric compositon comprising:(a) 100 phr of at least one diene elastomeric polymer; (b) from 5 phr to 120 phr, preferably from 10 phr to 80 phr, more preferably from 20 phr to 50 phr, of at least one layered material modified with at least one alkyl ammonium or alkyl phosphonium salt, said layered material having an individual layer thickness of from 0.01 nm to 30 nm, preferably of from 0.05 nm to 15 nm, more preferably of from 0.1 rim to 2 nm; (c) from 0.05 phr to 2 phr, preferably from 0.1 phr to 1 phr, more preferably from 0.2 phr to 0.5 phr, of at least one N-acyl-sulfenyl amide;, (d) from 0.3 phr to 5 phr, preferably from 0.5 phr to 4 phr, more preferably least one organic or inorganic acid or a derivative thereof selected from: carboxylic acids, phosphoric acids, sulfonic acids, boric acids, or derivatives thereof. Preferably, said at least one structural element is selected from bead filler, sidewall insert, tread underlayer, tread base.
Abstract:
The present invention relates to a process for the preparation of iodinated anilines; in particular, it relates to a process including the direct iodination, with suitably activated iodine, of 3,5-disubstituted anilines to the corresponding 3,5- disubstituted-2,4,6-triiodoanilines, which are useful intermediates for the synthesis of x-ray contrast media, and to the preparation of the contrast media themselves.
Abstract:
The present invention refers to the use of novel molecules able to bind tenaciously to silica, borosilicate and silicate surfaces, and thus to modify their properties and characteristics. When applied to silica-based chromatography, it offers important advantages in all cases in which it is necessary to modulate the interaction of analytes with the stationary phase. In capillary zone electrophoresis (CZE), such compounds will eliminate or invert the electroendoosmostic (EEO) flow, greatly simplifying the analysis of negatively-charged compounds and permitting the analysis of bio(macro)molecules via the direct use of naked capillaries.
Abstract:
The present invention relates to a process for the preparation of iodinated phenols; in particular; it relates to a process including the direct iodination, with suitably activated iodine, of 3,5-disubstituted phenol compounds to the corresponding 3,5-disubstituted-2,4,6-triiodophenols, which are useful intermediates for the synthesis of x-ray contrast media, and to the preparation of the contrast media themselves.
Abstract:
Fuel comprising an emulsion between water and a liquid hydrocarbon and polymeric surfactant, used to stabilize said emulsion, obtainable by: (a) reacting (i) at least one polyolefin oligomer functionalized with at least one group deriving from a dicarbonxylic acid, or a derivative thereof; and (ii) at least one polyocylakylene comprising linear oxyalkylenen units, said polyoxyalkylene being linked to a long-chain alkyl group optionally containing at least one ethylenic unsaturation; and (b) reacting the product of step (a) with (ii) at least one nitrogen compound selected from: monoamines, polyamines and quaternary ammonium hydroxides. The fuel has high stability over time, without forming carbonaceous deposits adhering to metal surfaces.
Abstract:
Process for manufacturing tires comprising the following steps: forming at least one layer including a crosslinkable elastomeric material on an outer surface of a toroidal support the shape of which substantially matches that of the inner surface of the tire; manufacturing a green tire on said toroidal support bearing said at least one layer, said green tire comprising at least one structural element including a crosslinkable elastomeric material; wherein one crosslinkable elastomeric material of said at least one layer includes a crosslinkable elastomeric composition comprising at least one sulfur-curable elastomeric polymer and at least one compound having the following general formula (I): A-(S) p -B wherein: p is an integer of from 2 to 10; A and B, which may be equal or different from each other, represent a group having the following general formula (II).
Abstract:
Tire comprising at least one structural element including a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition comprising: (a) an amount higher than or equal to 30 phr, preferably of from 40 phr to 100 phr, of at least one polyisoprene rubber; (b) an amount lower than or equal to 70 phr, preferably of from 0 phr to 60 phr, of at least one diene elastomeric polymer other than the polyisoprene rubber (a) ; (c) an amount higher than or equal to 30 phr, preferably of from 40 phr to 120 phr, of at least one carbon black reinforcing filler; (d) an amount of from 0.2 phr to 10 phr, preferably of from 1 phr to 5 phr, of at least one copolymer of at least one ethylenically unsaturated carboxylic acid or a derivative thereof with at least one ethylenically unsaturated monomer containing at least one polyoxyalkylene side chain. Preferably, said structural element is a tire's sidewall.
Abstract:
The present invention relates to a tire comprising at least one structural element including a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition comprising: (a)100 phr of at least one elastomeric polymer, (b)from about 0.1 phr to about 120 phr of at least one reinforcing filler; (c) from about 0.05 phr to about 10 phr of at least one crosslinking agent selected from the group comprising diazides having the following general formula (I): N 3 -A -R -B -N 3 (I) wherein -A and B, which may be equal or different from each other, are selected from the group comprising: a substituted or unsubstituted methylene group, a substituted or unsubstituted benzyl group, or a substituted or unsubstituted benzylidene group; -R may be alinear, branched, or cyclic alkylene group comprising from 1 to 20 carbon atoms, said alkylene group optionally comprising one or more heteroatoms selected from S, N, or O. Preferably, said structural element is selected from: bead filler, tread 20 underlayer, antiabrasive layers, or sidewall inserts.
Abstract:
Tire, comprising at least one structural element including a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition comprising: (a) at least one diene elastomeric polymer; (b) at least one activator obtained by dry corralling a mixture comprising: - at least one salt, or one oxide, or one hydroxide of a metal belonging to groups 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, or 16 of the Periodic Table of the Elements; and at least one layered material, said layered material having an individual layer thickness of from 0.01 nm to 30 nm, preferably of from 0.05 nm to 15 nm, more preferably of from 0.1 nm to 2 nm; (c) at least one vulcanization accelerator; (d) sulfur or derivatives thereof .
Abstract:
Tire comprising at least one structural element including a crosslinked elastomeric material obtianed by crosslinking a crosslinkable elastomeric composition comprising: (a) at least one diene elastomeric polymer; (b) at least one silica reinforcing filler; (c) at least one copolymer of at least one ethylenically unsaturated carboxylic acid or a derivative thereof with at least one ethylenically unsaturated monomer containing at least one polyoxyalkyline side chain (c). Preferably, said at least one structural element is a tire’s tread band.