Abstract: The invention relates to a conductive article made from a composite material comprising: from 50 to 99 wt % of a first polyethylene resin as based on the total weight of said composite material, wherein the first polyethylene resin has a melt index MI2 of at most 0.45 g/10 min as determined according to ISO 1133 (190° C.—2.16 kg), and a density ranging from 0.920 g/cm3 to 0.980 g/cm3 as determined according to ISO 1183 at a temperature of 23° C.; and from 0.2 to 10 wt % of carbon particles as based on the total weight of said composite material as determined according to ISO 11358 selected from nanographene, carbon nanotubes or any combination thereof; wherein the composite material further comprises from 0.10 to 0.48 wt % of polyethylene glycol as based on the total weight of the composite material, and in that said polyethylene glycol is selected to have a weight average molecular weight Mw of at most 20,000 g/mol.

Abstract: The invention relates to a conductive article made from a composite material comprising: from 50 to 99 wt % of a first polyethylene resin as based on the total weight of said composite material, wherein the first polyethylene resin has a melt index MI2 of at most 0.45 g/10 min as determined according to ISO 1133 (190° C.—2.16 kg), and a density ranging from 0.920 g/cm3 to 0.980 g/cm3 as determined according to ISO 1183 at a temperature of 23° C.; and from 0.2 to 10 wt % of carbon particles as based on the total weight of said composite material as determined according to ISO 11358 selected from nanographene, carbon nanotubes or any combination thereof; wherein the composite material further comprises from 0.10 to 0.48 wt % of polyethylene glycol as based on the total weight of the composite material, and in that said polyethylene glycol is selected to have a weight average molecular weight Mw of at most 20,000 g/mol.

Abstract: The present invention relates to a masterbatch for use in a process of preparing a composite material comprising a blend of a first semi-crystalline polymer with at least 5 wt % carbon nanotubes. Good dispersion of the carbon nanotube is obtained within the masterbatch and evidenced by the blending of the masterbatch with a second semi-crystalline polymer miscible with the first one in respective proportions to obtain a composite material containing about 1 wt % of carbon nanotubes wherein said composite material yields an agglomerate area fraction U % lower than 2 and a surface resistivity lower than 105 ohm/sq.

Abstract: The present invention relates to a masterbatch for use in a process of preparing a composite material comprising a blend of a first semi-crystalline polymer with at least 5 wt % carbon nanotubes. Good dispersion of the carbon nanotube is obtained within the masterbatch and evidenced by the blending of the masterbatch with a second semi-crystalline polymer miscible with the first one in respective proportions to obtain a composite material containing about 1 wt % of carbon nanotubes wherein said composite material yields an agglomerate area fraction U % lower than 2 and a surface resistivity lower than 105 ohm/sq.

Abstract: The present invention relates to a masterbatch to for use in a process of preparing a composite material, the masterbatch comprising a blend of a first amorphous polymer with carbon nanotubes, and at least 5% by weight of carbon nanotubes based on the total weight of the masterbatch, preferably from 5% to 15%, wherein the masterbatch exhibit a high load melt flow index HLMI1 of less than 40 g/10 min determined at 200° C. under a load of 21.6 kg according to ISO1133 and the first amorphous polymer has a melt flow index MFI1 of at least 10 g/10 min determined at 200° C. under a load of 5 kg according to ISO1133H. The invention also relates to the process for preparing such masterbatch and to process of preparing a composite material using said masterbatch.

Abstract: The invention relates to a conductive article such as a pipe or a container, wherein the article is made from a composite material comprising from 50 to 99 wt % of a first polyethylene resin having an HLMI ranging from 1 to 50 g/10 min, a melt index MI2 of at most 0.45 g/10 min, and a density ranging from 0.920 g/cm3 to 0.980 g/cm3; from 0.2 to 10 wt % of carbon particles selected from nanographene, carbon nanotubes (CNT) or any combination thereof; and from 0.01 to 5.0 wt % of one or more processing aids. The conductive article has a surface resistivity of at most 1.106 ohm/sq as determined according to silver ink method. The invention also relates to a process to produce such conductive article.

Abstract: The present invention relates to an article suitable to act as a thermal switch device, the article having a surface resistance of more than 105 ohms and formed from a polymer composition comprising from 50 to 99.9 wt % relative to the total weight of the polymer composition, of a polymer being selected from an amorphous polymer having a glass transition temperature Tg, a semi-crystalline polymer having a melting temperature Tm or a mixture thereof, and from 0.1 to 50 wt % relative to the total weight of the polymer composition, of a conductive material, wherein the surface resistance of the article is divided by at least 10, preferably by at least 100, when said article is submitted for a determined period of time of less than 5 minutes to a temperature of switch i) ranging from Tg+10° C. to Tg+250° C. if the polymer composition comprises an amorphous polymer, or ii) ranging from Tm?80° C. to Tm+250° C. if the polymer composition comprises a semi-crystalline polymer.

Abstract: A masterbatch for use in a process of preparing a composite material may contain a blend of a first amorphous polymer with carbon nanotubes. At least 5% by weight of carbon nanotubes may be present in the masterbatch, based on a total weight of the masterbatch. The masterbatch may exhibit a high load melt flow index HLMI1 of less than 40 g/10 min determined at 200° C. under a load of 21.6 kg according to ISO1133. The first amorphous polymer may have a melt flow index MFI1 of at least 10 g/10 min determined at 200° C. under a load of 5 kg according to ISO1133H.

Abstract: The invention relates to a multilayered sheet for a thermoforming process having improved resistance to sagging, the sheet comprising at least one layer of each of: a surface layer A comprising a composite material, wherein said composite material comprises a first amorphous polymer having a glass transition temperature Tg1 and from 0.05 wt % to 4.0 wt % as based on the total weight of the composite material of a conductive material; a substrate layer B comprising a polymer composition, wherein said polymer composition comprises at least a second amorphous polymer having a glass transition temperature Tg2, the glass transition temperature Tg2 of the second amorphous polymer being higher than the glass transition temperature Tg1 of the first amorphous polymer; wherein the second amorphous polymer has a heat deflection temperature of at least 85° C. as determined in accordance with ISO 75-2/A; and wherein at least one of the outer layers is the surface layer A.

Abstract: The present invention relates to a process for preparing a shaped composite article comprising a polymer composition and carbon particles being carbon nanotubes or graphene, said polymer composition comprising a mixture of a first polymer and a second polymer, and the composite article comprises from 0.01 to 4% by weight of carbon particles based on the total weight of the composite article as determined according to ISO 11358, characterized in that said process comprises the steps of providing a masterbatch comprising the first polymer and at least 5% of carbon particles by weight of the masterbatch as determined according to ISO 11358, providing the second polymer, and blending and shaping, in the same step, the masterbatch and the second polymer in a single extrusion or injection moulding device to form said shaped composite article.

Abstract: The present invention relates to an article suitable to act as a thermal switch device, the article having a surface resistance of more than 105 ohms and formed from a polymer composition comprising from 50 to 99.9 wt % relative to the total weight of the polymer composition, of a polymer being selected from an amorphous polymer having a glass transition temperature Tg, a semi-crystalline polymer having a melting temperature Tm or a mixture thereof, and from 0.1 to 50 wt % relative to the total weight of the polymer composition, of a conductive material, wherein the surface resistance of the article is divided by at least 10, preferably by at least 100, when said article is submitted for a determined period of time of less than 5 minutes to a temperature of switch i) ranging from Tg+10° C. to Tg+250° C. if the polymer composition comprises an amorphous polymer, or ii) ranging from Tm?80° C. to Tm+250° C. if the polymer composition comprises a semi-crystalline polymer.

Abstract: The present invention relates to a masterbatch for use in a process of preparing a composite material comprising a blend of a first semi-crystalline polymer with at least 5 wt % carbon nanotubes. Good dispersion of the carbon nanotube is obtained within the masterbatch and evidenced by the blending of the masterbatch with a second semi-crystalline polymer miscible with the first one in respective proportions to obtain a composite material containing about 1 wt % of carbon nanotubes wherein said composite material yields an agglomerate area fraction U % lower than 2 and a surface resistivity lower than 105 ohm/sq.

Abstract: A composition can include polystyrene, modified-polystyrene, or a mixture thereof. The polystyrene, modified-polystyrene, or mixture thereof can include carbon nanotubes. The composition can also include a polyolefin. The composition can include at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition. The composition can be prepared by providing a masterbatch including at least 5% by weight of carbon nanotubes based on a total weight of the masterbatch, and a polyolefin and/or styrenic copolymer. The masterbatch can be blended with polystyrene, modified-polystyrene, or a mixture thereof, and with a polyolefin, in amounts such that a conductive composition is obtained. An article can be made of the conductive composition.

Abstract: A composition can include polystyrene, modified-polystyrene, or a mixture thereof. The polystyrene, modified-polystyrene, or mixture thereof can include carbon nanotubes. The composition can also include a polyolefin. The composition can include at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition. The composition can be made by melt blending the polystyrene, modified-polystyrene, or a mixture thereof with carbon nanotubes, and with the polyolefin. An article can be made from the composition.

Abstract: A masterbatch for use in a process of preparing a composite material may contain a blend of a first amorphous polymer with carbon nanotubes. At least 5% by weight of carbon nanotubes may be present in the masterbatch, based on a total weight of the masterbatch. The masterbatch may exhibit a high load melt flow index HLMI1 of less than 40 g/10 min determined at 200° C. under a load of 21.6 kg according to ISO1133. The first amorphous polymer may have a melt flow index MFI1 of at least 10 g/10 min determined at 200° C. under a load of 5 kg according to ISO1133H.

Abstract: The present invention relates to a composition comprising polystyrene or modified-polystyrene or a mixture thereof, said polystyrene or modified-polystyrene or mixture thereof further comprising carbon nanotubes; wherein the composition comprises a polyolefin; and wherein the composition comprises at most 1.90% by weight of carbon nanotubes, based on the total weight of the composition. The present invention also relates to a method for the preparation of the composition, wherein the carbon nanotubes are provided in polyolefin or styrenic copolymer masterbatch.

Abstract: A composition can include polystyrene, modified-polystyrene, or a mixture thereof. The polystyrene, modified-polystyrene, or mixture thereof can include carbon nanotubes. The composition can also include a polyolefin. The composition can include at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition. The composition can be made by melt blending the polystyrene, modified-polystyrene, or a mixture thereof with carbon nanotubes, and with the polyolefin. An article can be made from the composition.