Abstract: The invention relates to a process for preparing a polyurea or a polyurethane organopolysiloxane block copolymer having a silicone content of at least 90% in weight relative to the total weight of the organosiloxane block copolymer. The invention further relates to a a polyurea or a polyurethane organopolysiloxane block copolymer obtained according to this process and its use in a method for manufacturing a 3D article by an additive technique.

Abstract: The present invention relates to a powder of spherical crosslinkable polyamide particles, which is suitable for the selective laser sintering (SLS) technique, and also to a process for obtaining such a powder of spherical crosslinkable polyamide particles. The present invention also relates to the production of articles by SLS, followed by a crosslinking step, using said powder of spherical crosslinkable polyamide particles.

Abstract: The invention relates to a 3D printable powder composition comprising a polyamide and less than 5 wt % by weight of at least one filler. The invention also relates to the process for preparing the 3D printable powder, and its use for the preparation of a 3D printed article.

Abstract: The present invention relates to a powder composition I comprising nanoparticles A blended with a polyolefinic powder II, said polyolefinic powder II containing particles B embedded in a polyolefinic matrix C, nanoparticles A being metal or metal oxide nanoparticles and particles B being metal, nitride, carbide or metal oxide micro or nanoparticles, said powder composition I containing at least 90 wt % of polyolefinic matrix C relative to the total weight of the powder composition I. The invention further relates to the preparation of said powder composition I and its use in an additive process for the preparation of a 3D printed article.

Abstract: The invention relates to 3D printable powders comprising 75-98 wt% of a polymeric matrix containing at least 90 wt % of polyolefin(s) and 2-25 wt% of at least one olefinic thermoplastic elastomer chosen from ethylene acetate elastomers, ethylene acrylate elastomers, ethylene propylene elastomers and ethylene alpha-olefin elastomers. The invention further relates to the preparation of these 3D printable powders and to their use in an additive process.

Abstract: The invention relates to a process for preparing a polyurea or a polyurethane organopolysiloxane block copolymer having a silicone content of at least 90% in weight relative to the total weight of the organosiloxane block copolymer. The invention further relates to a polyurea or a polyurethane organopolysiloxane block copolymer obtained according to this process and its use in a method for manufacturing a 3D article by an additive technique.

Abstract: The present invention relates to a powder of spherical crosslinkable polyamide particles, which is suitable for the selective laser sintering (SLS) technique, and also to a process for obtaining such a powder of spherical crosslinkable polyamide particles. The present invention also relates to the production of articles by SLS, followed by a crosslinking step, using said powder of spherical crosslinkable polyamide particles.

Abstract: The present invention provides a powder of spherical particles of crosslinkable polyamide suitable for the technique of selective laser sintering (SLS), and also a process for the production of such a powder of spherical particles of crosslinkable polyamide. The present invention also provides the production of articles by SLS, followed by a crosslinking step, starting from said powder of spherical particles of crosslinkable polyamide.

Abstract: The present invention provides a powder of spherical particles of crosslinkable polyamide suitable for the technique of selective laser sintering (SLS), and also a process for the production of such a powder of spherical particles of crosslinkable polyamide. The present invention also provides the production of articles by SLS, followed by a crosslinking step, starting from said powder of spherical particles of crosslinkable polyamide.

Abstract: The present invention relates to a method for manufacturing thermoplastic polyurethane pellets by means of reactive extrusion of: a long macrodiol with a molecular weight of 500 to 3000 g/mol; a diisocyanate; at least one chain extender comprising a dianhydrohexitol; and a polymerization catalyst. The invention also relates to the resulting thermoplastic polyurethane pellets.

Abstract: The object of the invention is a method for preparing a polyamide from one or several monomers adapted for the preparation of polyamide characterized in that the selected monomer(s), is(are) introduced without any preliminary reaction and without any preliminary preparation of the corresponding salt, in an extruder including at least two conveying screws rotating co-rotatively and in that all the reaction and polycondensation steps, initially starting from the selected monomer(s), and giving the possibility of ending up with the desired polyamide, are conducted in an extruder including at least two conveying screws rotating co-rotatively, and polycondensation is achieved by carrying out at least two operations for discharging the by-product(s) formed by the polycondensation reaction.

Abstract: The present invention relates to a method for preparing novel thermoplastic amylaceous compositions, as well as to such thermoplastic amylaceous compositions.

Abstract: A thermoplastic and/or elastomer composition includes: at least 50 wt % and 99.95 wt % at most of a starchy composition (a) including at least one starch; at least 0.05 wt % and 50 wt % at most of a nanometric product (b) including particles having at least one dimension of 0.1 to 500 nanometers and selected from mixed products containing at least one lamellar clay and at least one cationic oligomer or cationic synthetic polymer, organic, mineral or mixed nanotubes, organic, mineral or mixed nanocrystals and nanocrystallites, organic, mineral or mixed nanobeads and nanospheres customized into clusters or agglomerated, and mixtures of these nanometric products, the percentage being expressed in dry weight and added to the sum in dry weight of (a) and (b); and at least one non-starchy polymer (c).