An additive masterbatch composition comprising a semi-crystalline polyolefin carrier resin and an additive package comprising a product of a reaction of an acidic condensation catalyst and a secondary diarylamine. A moisture-curable polyolefin composition comprising the additive masterbatch composition and a (hydrolyzable silyl group)-functional polyolefin prepolymer. A method of making the compositions; a moisture-cured polyolefin composition prepared therefrom; a manufactured article comprising or made from the formulation; and a method of using the manufactured article.

A masterbatch is disclosed including a sulfide compound (A) and filler (B). The sulfide compound (A) is a chain or cyclic compound of repeating units represented by

RS.sub.x(I)

where R represents a linear, branched or cyclic alkylene group having 1 to 12 carbon atoms; a linear, branched or cyclic (poly)oxyalkylene group having 1 to 12 carbon atoms; or a linear, branched or cyclic (poly)thioalkylene group having 1 to 12 carbon atoms (wherein the alkylene group, the (poly)oxyalkylene group and the (poly)thioalkylene group are unsubstituted or have 1 or more optional substituents), and x represents an integer from 1 to 8. The filler (B) is at least one selected from the group consisting of carbon black, talc, clay, mica, sericite, diatomaceous earth, zinc white, and organic resin particles and satisfies following conditions that BET specific surface area is 0.1 to 200 m.sup.2/g and DBP oil absorption is 50 to 300 ml/100 g.

A method for preparing a preblend of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene--olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.

Method for the manufacture of a colored polymer composition comprising a polymer, a release agent and a colorant, the method comprising the steps of feeding a solid form of a release agent composition comprising said release agent and said colorant to a feed section of a melt mixing device, feeding said polymer to said melt mixing device and mixing said release agent composition and said polymer in said melt mixing device at a temperature above the melting temperature of said polymer, whereinsaid colorant is a pigment, or a dye which is soluble in said release agent, said polymer comprises or consists of polycarbonate, the release agent is selected from the group consisting of penta-erythritol tetra stearate, glycerol monostearate, glycerol tristearate and mixtures thereof.

A method for producing a stabilizer composition for a polymer and a stabilizer composition produced by the method. At least one carboxylic acid is reacted with at least one metal compound, such as at least one metal hydroxide and/or at least one metal oxide and/or at least one metal carbonate, thereby forming a metal carboxylate of the carboxylic acid. The reaction of the carboxylic acid with the metal compound is carried out in a continuous manner in an extruder while reaction water being formed is discharged out of the extruder.

The present invention relates to processes for making compatibilized high aspect ratio barrier additives and polymer compositions that comprise compatibilized high aspect ratio barrier additives. The invention also relates to compositions produced by these processes, and articles formed from polymer compositions of this invention. The barrier additives provide passive barriers to gas molecules such as oxygen and carbon dioxide minimizing transit of such molecules through sidewalls of polymer articles containing the barrier additives.

Powder mixture comprising: 20-90 wt % of one or more powdered organic peroxides and 10-80 wt % of one or more powdered filler materials, at least 60 wt % thereof being barium sulphate.

A composition includes specific amounts of a poly(phenylene ether), a rubber-modified polystyrene, a flame retardant containing an organophosphate ester, and a mold release agent containing a high viscosity polydiorganosiloxane. The composition excludes polyolefin waxes. The high viscosity polydiorganosiloxane can be provided in the form of a room temperature solid masterbatch, thereby facilitating compounding of the composition. The composition is useful for injection molding, and particularly useful for injection molding battery holders for cell phone tower back-up power systems.

The invention relates to a fatty acid diamide-based rheology additive composition, which is pre-activated and pre-concentrated in fatty acid diamide, comprising: a) from 5% to 30% by weight of at least one fatty acid diamide based on 12 hydroxystearic acid and on a linear, in particular C5, C6 or C7, aliphatic diamine, b) from 70% to 95% by weight of at least one monofunctional (meth)acrylic reactive diluent comprising a cycloaliphatic group or several cycloaliphatic groups, the % being expressed relative to a)+b). It also relates to a process for preparing the composition and to the use thereof as a rheology additive in reactive binder compositions such as coating, moulding, composite material, anchor bolt or sealant compositions or photocrosslinkable compositions for stereolithography or for 3D printing of objects by inkjet.

A method for preparing a preblend of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene--olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.