Abstract:
The invention relates to a ceramic feedstock comprising the components a), b) and optionally c), wherein component a) is at least one ceramic material, component b) is at least one binder (B) and optional component c) is at least one additive (A). The ceramic feedstock is preferably provided in form of a filament to be employed in three-dimensional (3D) printing techniques, particularly in a FFF printing process. The inventive ceramic feedstock can, therefore, be successfully employed for the 3D printing of support structures and/or separation layers. Further, the invention also relates to three-dimensional objects as such, in particular three-dimensional green bodies, three-dimensional brown bodies or three-dimensional sintered bodies as well as to a process for the preparation thereof.
Abstract:
The invention relates to a filament comprising a core material (CM) comprising an inorganic powder (IP) and the core material (CM) is coated with a layer of shell material (SM) comprising a thermoplastic polymer. Further, the invention relates to a process for the preparation of said filament, as well as to three-dimensional objects and a process for the preparation thereof.
Abstract:
The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (RG) which comprises at least one formaldehyde source and at least one initiator mixture (IG), wherein the initiator mixture (IG) comprises at least one polymerization initiator and at least one solvent of the general formula (I) R1—O—[—R3—O—]m—R2 (I), where m is 1, 2, 3 or 4; R1 and R2 are each, independently of one another, C3-C6-alkyl; R3 is C1-C5-alkylene.
Abstract translation:该专利申请涉及通过聚合包含至少一种甲醛源和至少一种引发剂混合物(IG)的反应混合物(RG)来制备聚甲醛的方法,其中引发剂混合物(IG)包含至少一种聚合引发剂和 至少一种通式(I)R 1 -O - [ - R 3 -O-] m -R 2(I)的溶剂,其中m为1,2,3或4; R 1和R 2各自独立地为C 3 -C 6 - 烷基; R3是C1-C5-亚烷基。
Abstract:
The present invention relates to the use of a filament comprising a core material (CM) comprising a ceramic material precursor (CMP) and the core material (CM) is coated with a layer of shell material (SM) comprising a thermoplastic polymer as a support material in a fused filament fabrication process. Further, the invention relates to three-dimensional objects and a process for the preparation thereof.
Abstract:
The invention relates to polyoxymethylene copolymers with medium molecular weight, processes for producing these, and their use. The invention furthermore relates to thermoplastic compositions which comprise mixtures of polyoxymethylene homo- or copolymers, production of these, use of these for producing metallic or ceramic moldings, and the resultant moldings.
Abstract:
The invention relates to composition comprising (a) from 40 to 70% by volume of a metal powder, based on the total volume of the composition, in which the metal powder is an alloy comprising: (a1) from 4.0 to 13.0% by weight of chromium, (a2) from 6 to 15% by weight of aluminum, 0(a3) from 4 to 30% by weight of manganese, (a4) from 38.4 to 85.95% by weight of iron, (a5) from 0.05 to 0.5% by weight of titanium, (a6) from 0% to 0.2% by weight of nickel, (a7) from 0% to 1.5% by weight of silicon, 5(a8) from 0% to 1.5% by weight carbon, all based on the total weight of the metal powder; and (b) from 30 to 60% by volume, based on the total volume of the composition, of a polymeric binder. Furthermore, the invention relates to the use of such composition in metal injection molding or additive manufacturing as well as the use of the metal powder in a binder-into-bed jetting process.
Abstract:
Poly-1,3-dioxepane, poly-1,3-dioxolane, polytetrahydrofurane or mixtures thereof are used in molding materials comprising polyoxymethylene or a copolymer containing a majority of oxymethylene units, for improving the flexural toughness of moldings formed from the molding materials.
Abstract:
The present invention relates to the use of a polymer comprising polymerized units (A) and (B): (A) at least one first monomer of the formula (I) where n is 3 to 12; m is 0 to 3; R1 is C1-C10-alkyl, C2-C10-alkenyl, aryl or aralkyl; R2, R3 and R4 are each, independently of one another, hydrogen, C1-C10-alkyl, C2-C10-alkenyl, aryl or aralkyl; and (B) at least one second monomer of the formula (II) where R5, R6 and R7 are each, independently of one another, hydrogen, C1-C10-alkyl, C2-C10-alkenyl, aryl or aralkyl; R8 is C1-C20-alkyl, C2-C10alkenyl, aryl or aralkyl; as a support material in a fused filament fabrication process.
Abstract:
The present invention relates to the use of a filament comprising a core material (CM) comprising a ceramic material precursor (CMP) and the core material (CM) is coated with a layer of shell material (SM) comprising a thermoplastic polymer as a support material in a fused filament fabrication process. Further, the invention relates to three-dimensional objects and a process for the preparation thereof.
Abstract:
The present invention relates in a first aspect to an iron-based alloy powder containing non-spherical particles and at least 40% of the total amount of particles have a non-spherical shape. The alloy mandatorily comprises the elements Fe (iron), Cr (chrome) and Mo (molybdenum). Furthermore, the alloy may comprise further elements such as C (carbon), Ni (nickel), Nb (niobium) or Si (silicon). The present invention relates, according to a second aspect, to an iron-based alloy powder wherein the alloy comprises the elements Fe, Cr and Mo and the iron-based alloy powder is produced by an ultra-high liquid atomization process comprising at least two stages as defined below.