Abstract: The invention concerns the preparation of sulphur-containing organosilicic compounds of general formula (I) wherein, for example: R1?C1-C15 alkyl; R2 and R3?C1-C6 alkyl; in a mean number ranging from 1.5±0.1 to 5±0.1. Said preparation is carried out by performing successively the following steps (a), (b) and (c): (a) hydrosilylation of the type: R2R3HSi-Hal+CH2?CH—CH2-Hal}Hal-R2R3Si—(CH2)3Hal; (b) alcoholysis of the type: Hal-R2R3Si—(CH2)3-Hal+R1—OH}R?O—R2R3Si—(CH2)3Hal; (c) sulphidization of the type: R?O—R2R3Si—(CH2)3Hal+M2Sx} compound of formula (I); with Hal=a halogen atom and M=alkali metal.

Abstract: The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Abstract: The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Abstract: The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Abstract: The invention concerns an isocyanate composition useful for applying powder paints. Said composition is characterized in that it contains a masked isocyanate compound and an unmasked cycloaliphatic isocyanate compound. The invention is applicable in the chemistry of paints.

Abstract: The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Abstract: The invention relates to the preparation of organodialkylalkoxysilane using a continuous method consisting in bringing an alkanol into continuous contact with an omega-haloalkyl dialkylhalosilane in a countercurrent reactor, such as a plate column or a packed column. The reaction is performed in the aforementioned countercurrent reactor in the presence or absence of a non-reactive solvent with scavenging of the hydrochloric acid formed. The omega-haloalkyl dialkylalkoxysilane thus formed is particularly suitable for use as a starting material for the preparation of organosilicon compounds containing sulphur having general formula (I) by means of sulphidisation reaction on an alkaline metal polysulphide.

Abstract: Provided is a composition useful for obtaining a high gloss coating, for example, a high gloss paint. The composition includes an isocyanate which is at least partially masked by one or more masking agent, and having a degree of liberation with respect to the masking agent at 120 ° C. of 5 % or less. A polyol has a glass transition temperature of about 40° C. or more, a hydroxyl number of about 20 mg KOH/g or more and an average molecular weight Mn of about 500 g/mol or more. Also provided is a process for preparing the composition, wherein the isocyanate, the polyol and any other components are preblended in a blender. The polyol and other meltable components of the blend are melted, homogenized and dispersed in an extruder having one or more screws. Further provided are paint compositions, wherein the paint is a high gloss paint. The compositions are environmentally friendly and result in high gloss coatings having beneficial mechanical properties.

Abstract: The invention concerns an isocyanate composition useful for applying powder paints. Said composition is characterized in that it contains a masked isocyanate compound and an unmasked cycloaliphatic isocyanate compound. The invention is applicable in the chemistry of paints.

Abstract: The present invention relates to a composition, particularly useful in paint. This composition is defined in that it contains, for successive or simultaneous addition: an isocyanate which is at least partially masked, having a glass transition temperature (sometimes denoted by the abbreviation Tg) of at least 20° C., advantageously of at least 40° C., and a degree of liberation at 120° C. of not more than 5%; a polyol having the following characteristics: a glass transition temperature (sometimes denoted by the abbreviation Tg) which is at least equal to about 40° C., advantageously at least equal to about 50° C.; a hydroxyl number at least equal to about 10 mg/g, advantageously at least equal to about 15 mg/g; an average molecular mass Mn at least equal to about 1000 g/mol and advantageously to 2000 g/mol.

Abstract: The present invention relates to a composition, particularly useful in paint.

Abstract: The present invention relates to a composition, particularly useful in paint. This composition is defined in that it contains, for successive or simultaneous addition: an isocyanate which is at least partially masked, having a glass transition temperature (sometimes denoted by the abbreviation Tg) of at least 20° C., advantageously of at least 40° C., and a degree of liberation at 120° C. of not more than 5%; a polyol having the following characteristics: a glass transition temperature (sometimes denoted by the abbreviation Tg) which is at least equal to about 40° C., advantageously at least equal to about 50° C.; a hydroxyl number at least equal to about 10 mg/g, advantageously at least equal to about 15 mg/g; an average molecular mass Mn at least equal to about 1000 g/mol and advantageously to 2000 g/mol.