The present invention refers to a mineral matter powder preparation by wet process without acrylic additive or other grinding aid additives and to the use of said mineral matter after an optional hydrophobic treatment. Said mineral material having superior dispersing properties.

The present invention refers to a mineral matter powder preparation by wet process without acrylic additive or other grinding aid additives and to the use of said mineral matter after an optional hydrophobic treatment. Said mineral material having superior dispersing properties.

A precipitated silica suitable for thermal insulation applications and a process for its manufacture.

A precipitated silica suitable for thermal insulation applications and a process for its manufacture.

The present invention provides alumina hydrate particles, a flame retardant and a resin composition that are each for an electric wire/cable covering material improvable in flame retardancy and mechanical properties while the covering material keeps acid resistance; such an electric wire/cable; and producing methods thereof. The alumina hydrate particles of the present invention for electric wire/cable covering material have an average particle size of 0.5 to 2.5 μm, and having a primary particle variation R of 24% or less, the variation R being represented by the following expression:
primary particle variation R (%)=“standard deviationσ(μm) of major axis diameters of the primary particles”/“average value(μm) of the major axis diameters of the primary particles”×100.

The present invention provides alumina hydrate particles, a flame retardant and a resin composition that are each for an electric wire/cable covering material improvable in flame retardancy and mechanical properties while the covering material keeps acid resistance; such an electric wire/cable; and producing methods thereof. The alumina hydrate particles of the present invention for electric wire/cable covering material have an average particle size of 0.5 to 2.5 μm, and having a primary particle variation R of 24% or less, the variation R being represented by the following expression:
primary particle variation R (%)=“standard deviationσ(μm) of major axis diameters of the primary particles”/“average value(μm) of the major axis diameters of the primary particles”×100.

Aqueous coating compositions providing enhanced anticorrosive and water-resistant properties. The anticorrosive coating comprises water borne resin, surface-hydrophobic inorganic pigments, and/or surface-hydrophobic inorganic extenders.

A process for treatment of nanoparticles of mineral filler for obtaining 5 processed nanoparticles for use in polymerization in the presence of nanopartciles which includes the steps of (a) drying a mineral filler with an inert gas for remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the 10 mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products 15 from scavenging agent and catalyst poisons to obtain the treated nanoparticles.

A process for treatment of nanoparticles of mineral filler for obtaining 5 processed nanoparticles for use in polymerization in the presence of nanopartciles which includes the steps of (a) drying a mineral filler with an inert gas for remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the 10 mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products 15 from scavenging agent and catalyst poisons to obtain the treated nanoparticles.

A process for treatment of nanoparticles of mineral filler for obtaining 5 processed nanoparticles for use in polymerization in the presence of nanopartciles which includes the steps of (a) drying a mineral filler with an inert gas for remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the 10 mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products 15 from scavenging agent and catalyst poisons to obtain the treated nanoparticles.