Abstract:
The present invention relates to a novel process for producing ceramic materials, in particular refractory materials having a reduced relative density. In particular, the invention relates to a process for producing light, refractory materials having non-contiguous pores based on shaped and unshaped materials. These materials can be used as working lining in high-temperature applications. The process is based on the production of spherical, closed and isolated pores in the microstructure of the material. The pores having a pore diameter which can be set in a targeted manner are generated by use of polymer particles, in particular polymethacrylates, in particular polymers or copolymers prepared by means of suspension polymerization, as pore formers which can be burnt out. The polymers or copolymers are present in the form of small spheres having a defined diameter. The introduction of isolated spherical pores allows the production of ceramic materials having a sometimes significantly reduced relative density and improved corrosion resistance and better mechanical strength compared to the prior art. The specific, closed pore system at the same time contributes to reducing the thermal conductivity of the ceramic materials. In addition, the novel process has the advantage that there is no risk of formation of undesirable black cores, even in the production of thick-walled ceramic products.
Abstract:
A 3D extrusion print process for producing multicolored three-dimensional objects is provided. The process produces mechanically stable, multicolored 3D objects with good color definition. The process according to the invention is based on coating, upstream of the printing head, of the polymer strand used for producing the actual object, and on fixing of the coating upstream of entry of the polymer strand into the printing head. Downstream of the extrusion process in the printing head, the coating remains predominantly at the surface of the extruded strand.
Abstract:
The invention relates to a foamable bead polymer consisting of (meth)acrylonitrile, (meth)acrylic acid, copolymerizable latent blowing agents and optionally (meth)acrylic esters, the preparation thereof by suspension polymerization and the use thereof for producing foams. Such a bead polymer makes it possible, for example, to carry out in-mould foaming in a simple way and thus produce products having the shape of the desired workpiece directly. These workpieces are highly suitable as components in space, air, water and land vehicles and for other construction elements.
Abstract:
The invention relates to a modified fused deposition modeling process for production of multicolored three-dimensional objects. More particularly, the invention relates to a 3D printing process with which 3D objects with particularly good color appearance compared to the prior art can be produced. The process according to the invention is based on surface coloring or additive coating of the polymer strand used for production of the actual object or of the melt which results therefrom in the nozzle.
Abstract:
The present invention comprises a novel formulation for marking trafficways, for example roads, which when compared with the prior art have improved mechanical properties and improved heat resistance during curing. The invention also relates to improved reactive resins for other applications than roadmarkings. The present invention in particular relates to reactive resins which comprise core-shell particles.
Abstract:
The present invention relates to a novel process for producing ceramic materials, in particular refractory materials having a reduced relative density. In particular, the invention relates to a process for producing light, refractory materials having non-contiguous pores based on shaped and unshaped materials. These materials can be used as working lining in high-temperature applications. The process is based on the production of spherical, closed and isolated pores in the microstructure of the material. The pores having a pore diameter which can be set in a targeted manner are generated by use of polymer particles, in particular polymethacrylates, in particular polymers or copolymers prepared by means of suspension polymerization, as pore formers which can be burnt out. The polymers or copolymers are present in the form of small spheres having a defined diameter. The introduction of isolated spherical pores allows the production of ceramic materials having a sometimes significantly reduced relative density and improved corrosion resistance and better mechanical strength compared to the prior art. The specific, closed pore system at the same time contributes to reducing the thermal conductivity of the ceramic materials. In addition, the novel process has the advantage that there is no risk of formation of undesirable black cores, even in the production of thick-walled ceramic products.
Abstract:
The invention relates to a modified fused deposition modeling process for production of multicolored three-dimensional objects. More particularly, the invention relates to a 3D printing process with which 3D objects with particularly good color appearance compared to the prior art can be produced. The process according to the invention is based on coloring of the polymer strand used for production of the actual object in the nozzle, and on using a mixing apparatus which comprises a plurality of injection needles, a static mixer or a dynamic mixer.
Abstract:
The invention relates to a modified fused deposition modeling process for production of multicolored three-dimensional objects. More particularly, the invention relates to a 3D printing process with which 3D objects with particularly good color appearance compared to the prior art can be produced. The process according to the invention is based on coloring of the polymer strand used for production of the actual object in the nozzle, and on using a mixing apparatus which comprises a plurality of injection needles, a static mixer or a dynamic mixer.
Abstract:
Dental material which contains at least one compound of the formula [PG]m-R1-Z-SP—Y—R2—[WG]p, in which m=1, 2 or 3; p=1, 2 or 3; R1=is absent, a linear or branched C1 to C20 alkylene radical which can be interrupted one or more times by O, S, NH, SiR′, CONH CONR′, COO and/or OCONH, a substituted or unsubstituted, aromatic C6 to C14 radical or a combination thereof; R2=is absent, a linear or branched C1 to C20 alkylene radical which can be interrupted one or more times by O, S, NH, SiR′, CONH CONR′, COO and/or OCONH, a substituted or unsubstituted, aromatic C6 to C14 radical or a combination thereof; PG=a radically polymerizable group; SP=a polymeric spacer which is selected from polyethylene glycol, polypropylene glycol, polyglycerol, polyalkyloxazoline, polyethyleneimine, polyacrylic acid, polymethacrylic acid, polyvinyl alcohol, polyvinyl acetate, poly-(2-hydroxyethyl)acrylate, poly-(2-hydroxyethyl)methacrylate groups, hydrophilic polypeptide groups and copolymers of the corresponding monomers; WG=antimicrobially active group; Z=is absent, O, S, an ester, amide or urethane group; Y=is absent, O, S, an ester, amide or urethane group, and which has a molecular weight of at least 1.000.
Abstract translation:含有至少一种式[PG] m -R 1的化合物的牙科材料-Z-SP-YR 2 - [WG] 其中m = 1,2或3; p = 1,2或3; R 1不存在,可以被O,S中断一次或多次的直链或支链C 1至C 20亚烷基 ,NH,SiR',CONH CONR',COO和/或OCONH,取代或未取代的芳族C 6至C 14个基团或其组合; R 2不存在,可以被O,S中断一次或多次的直链或支链C 1至C 20亚烷基 ,NH,SiR',CONH CONR',COO和/或OCONH,取代或未取代的芳族C 6至C 14个基团或其组合; PG =自由基聚合性基团; SP =选自聚乙二醇,聚丙二醇,聚甘油,聚烷基恶唑啉,聚乙烯亚胺,聚丙烯酸,聚甲基丙烯酸,聚乙烯醇,聚乙酸乙烯酯,聚(2-羟乙基)丙烯酸酯,聚(2-羟乙基)甲基丙烯酸酯 基团,亲水性多肽组和相应单体的共聚物; WG =抗微生物活性组; Z =不存在,O,S,酯,酰胺或氨基甲酸酯基; Y =不存在,O,S,酯,酰胺或氨基甲酸酯基,其分子量至少为1.000。
Abstract:
The present invention relates to a novel process for producing ceramic materials, in particular refractory materials having a reduced relative density. In particular, the invention relates to a process for producing light, refractory materials having non-contiguous pores based on shaped and unshaped materials. These materials can be used as working lining in high-temperature applications. The process is based on the production of spherical, closed and isolated pores in the microstructure of the material. The pores having a pore diameter which can be set in a targeted manner are generated by use of polymer particles, in particular polymethacrylates, in particular polymers or copolymers prepared by means of suspension polymerization, as pore formers which can be burnt out. The polymers or copolymers are present in the form of small spheres having a defined diameter. The introduction of isolated spherical pores allows the production of ceramic materials having a sometimes significantly reduced relative density and improved corrosion resistance and better mechanical strength compared to the prior art. The specific, closed pore system at the same time contributes to reducing the thermal conductivity of the ceramic materials. In addition, the novel process has the advantage that there is no risk of formation of undesirable black cores, even in the production of thick-walled ceramic products.