Methods for producing highly spherical particles that comprise: mixing a mixture comprising: (a) nanoclay-filled-polymer composite comprising a nanoclay dispersed in a thermoplastic polymer, (b) a carrier fluid that is immiscible with the thermoplastic polymer of the nanoclay-filled-polymer composite, optionally (c) a thermoplastic polymer not filled with a nanoclay, and optionally (d) an emulsion stabilizer at a temperature at or greater than a melting point or softening temperature of the thermoplastic polymer of the nanoclay-filled-polymer and the thermoplastic polymer, when included, to disperse the nanoclay-filled-polymer composite in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form nanoclay-filled-polymer particles; and separating the nanoclay-filled-polymer particles from the carrier fluid.

Methods for producing highly spherical particles that comprise: mixing a mixture comprising: (a) nanoclay-filled-polymer composite comprising a nanoclay dispersed in a thermoplastic polymer, (b) a carrier fluid that is immiscible with the thermoplastic polymer of the nanoclay-filled-polymer composite, optionally (c) a thermoplastic polymer not filled with a nanoclay, and optionally (d) an emulsion stabilizer at a temperature at or greater than a melting point or softening temperature of the thermoplastic polymer of the nanoclay-filled-polymer and the thermoplastic polymer, when included, to disperse the nanoclay-filled-polymer composite in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form nanoclay-filled-polymer particles; and separating the nanoclay-filled-polymer particles from the carrier fluid.

A tube connection part adapted to accommodate a flexible tube made from a material comprising polyvinyl chloride, wherein said tube connection part comprises a sleeve adapted to form an overlapping region between said tube connection part and said tube, wherein an adhesion promoting agent is deposited on at least a subsection of a surface of said sleeve, characterized in that the adhesion promoting agent comprises a styrene-butadiene block copolymer.

A tube connection part adapted to accommodate a flexible tube made from a material comprising polyvinyl chloride, wherein said tube connection part comprises a sleeve adapted to form an overlapping region between said tube connection part and said tube, wherein an adhesion promoting agent is deposited on at least a subsection of a surface of said sleeve, characterized in that the adhesion promoting agent comprises a styrene-butadiene block copolymer.

Provided are a novel ester-based compound and a use thereof. A use of a novel ester-based compound for improving heat resistance and compatibility as a plasticizer is provided. When the ester-based compound according to the present invention is used as the plasticizer of a heat-resistant resin composition, a synergistic effect on improvement of physical properties such as migration resistance and heating loss is provided to contribute to improvement of the physical properties of a molded article, and due to a rapid absorption rate and a short melting time, processability of the heat-resistant resin composition may be improved.

Provided are a novel ester-based compound and a use thereof. A use of a novel ester-based compound for improving heat resistance and compatibility as a plasticizer is provided. When the ester-based compound according to the present invention is used as the plasticizer of a heat-resistant resin composition, a synergistic effect on improvement of physical properties such as migration resistance and heating loss is provided to contribute to improvement of the physical properties of a molded article, and due to a rapid absorption rate and a short melting time, processability of the heat-resistant resin composition may be improved.

A recyclable, sealable packaging that has one or several polyamides, in a proportion greater than or equal to 90% by weight with respect to the total, and the sealing layer consists of one or several polyamides that are sealable at less than 200° C. is disclosed. The invention affords the main advantages of being recyclable after its use and having a sufficiently low melting temperature for it to seal with itself and with other polyamides.

A recyclable, sealable packaging that has one or several polyamides, in a proportion greater than or equal to 90% by weight with respect to the total, and the sealing layer consists of one or several polyamides that are sealable at less than 200° C. is disclosed. The invention affords the main advantages of being recyclable after its use and having a sufficiently low melting temperature for it to seal with itself and with other polyamides.

The present invention refers to a polyvinyl chloride composition with high stability, said composition comprising: a) 100 phr (parts per hundred resin) of a polyvinyl chloride resin, b) 10-150 phr of pentaerythritol tetravalerate as plasticizer, said pentaerythritol tetravalerate having an acid value of less than 0.05 mg KOH/g and being obtained through esterification of valeric acid and high purity pentaerythritol having a purity of at least 98%, an ash content of less than 200 ppm and a dipentaerythritol content of 0.1-2 wt%, c) 0.3-14 phr of at least one stabilizer, and optionally d) at least one additive, wherein and the amount of free acid in the polyvinyl chloride composition is less than 30 ppm, preferably less than 20 ppm. The invention further refers to a polyvinyl chloride article comprising said composition and having an amount of free acid less than 30 ppm, preferably less than 20 ppm. The present invention also refers to a method for analyzing the amount of free acid in a polyvinyl chloride sample.

The present invention refers to a polyvinyl chloride composition with high stability, said composition comprising: a) 100 phr (parts per hundred resin) of a polyvinyl chloride resin, b) 10-150 phr of pentaerythritol tetravalerate as plasticizer, said pentaerythritol tetravalerate having an acid value of less than 0.05 mg KOH/g and being obtained through esterification of valeric acid and high purity pentaerythritol having a purity of at least 98%, an ash content of less than 200 ppm and a dipentaerythritol content of 0.1-2 wt%, c) 0.3-14 phr of at least one stabilizer, and optionally d) at least one additive, wherein and the amount of free acid in the polyvinyl chloride composition is less than 30 ppm, preferably less than 20 ppm. The invention further refers to a polyvinyl chloride article comprising said composition and having an amount of free acid less than 30 ppm, preferably less than 20 ppm. The present invention also refers to a method for analyzing the amount of free acid in a polyvinyl chloride sample.