Abstract: The present invention refers to solid mixtures of alpha hydroxycarbonyl derivatives of alpha-methylstyrene oligomers containing at least 90% of the dimer isomers, the dimer isomer ratio being between 2.5 and 7, to their preparation and to their use as photoinitiators in photopolymerisation.

Abstract: The invention relates to a composition for positive heat sensitive CTP lithographic printing plates comprising a phenolic resin and an IR absorber characterized by the fact that it contains from 1 to 30% w/w of an organic oxygenated phosphorous compound chosen from the group of general formula (I): wherein R1, R2, R3 are independently: C3-C12 linear or branched alkyl; phenyl or heteroaryl eventually substituted with R4, wherein R4 is halogen, C1-C12 linear or branched alkyl, C1-C12 linear or branched alkoxyl; OR5 wherein R5 is C3-C12 linear or branched alkyl, phenyl or heteroaryl eventually substituted with R4, wherein R4 is halogen, C1-C12 linear or branched alkyl, C1-C12 linear or branched alkoxyl.

Abstract: The present invention relates to sulfonium salts, to methods for their preparation and to radiation curable compositions containing them as photoinitiators.

Abstract: Disclosed are chlorine containing polymer compositions containing stabilizers which impart good thermal stability. PVC compositions and, in particular, flexible PVC compositions containing stabilizers which are oligomeric and/or polymeric aminouracyls exhibit high thermal stability as evidenced by improved resistance to yellowing and blistering upon extended exposure to high temperatures.

Abstract: The present invention refers to solid mixtures of alpha hydroxycarbonyl derivatives of alpha-methylstyrene oligomers containing at least 90% of the dimer isomers, the dimer isomer ratio being between 2.5 and 7, to their preparation and to their use as photoinitiators in photopolymerisation.

Abstract: Disclosed are chlorine containing polymer compositions containing stabilizers which impart good thermal stability. PVC compositions and, in particular, flexible PVC compositions containing stabilizers which are oligomeric and/or polymeric aminouracyls exhibit high thermal stability as evidenced by improved resistance to yellowing and blistering upon extended exposure to high temperatures.

Abstract: The present invention relates to compounds of general formula (I) wherein X1 and X2 are different form each other and have the meanings reported in the following description Y is a simple bond, C1-C12 linear or branched alkyl groups, —O—, —S—, >S═O, >SO2, NR17—, wherein R17 is H, C1-C12 linear or branched alkyl groups, COR1, and photopolymerisable formulations containing as photoinitiators the aforementioned compounds of formula (I).

Abstract: A process for forming a color selection mask for a CRT, in a press containing a punch and a counter-punch, after a temperature build-up stage in a shaping chamber, through the circulation of pressurized hot gas injected by inlets placed on the walls of the counter-punch, includes the step of distributing the hot gas through a distribution device to uniformly heat the mask's surface.

Abstract: In the proposed steering device a drive shaft is operationally connected to the front wheel steering mechanism and to a driven shaft by way of motion step-down means; the two shafts are provided with respective cranks, and with respective pins which engage in a link element operationally connected to steering levers for the rear wheels.

Abstract: The valve unit comprises non-return valves disposed within the intake duct and formed from longitudinal channels and flaps which engage these latter. The channels are provided with seal gaskets at their edges and are formed with their base walls shaped on their outer side in such a manner as to improve the valve reliability and life. The flaps comprise fixing tabs which are clamped between ledges and support surfaces of the superposed channels.

Abstract: A device is proposed for gasoline feeding to an internal combustion engine, comprising injectors for injecting gasoline in the nearby of intake valves under low- and medium-load operating conditions, and valve means to feed gasoline into the feed manifold under high-load operating conditions.