Abstract: The invention relates to a method for the production of polyamide nanocomposites made from base polymers comprising aromatic components and organically-modified phyllosilicates in a double-screw extruder with a front-feeder and a side-feeder. Said method is characterised in that a portion (A) from 8 to 15 wt. % of a granulate of the base polymer is introduced in the front-feeder of the double-screw extruder and the main portion (B) of said granulate of the base polymer is introduced by means of the side feeder of the double-screw extruder and that 2 to 8 wt. % of the modified phyllosilicate is introduced into the melt of the granulate portion (A) of the base polymer, whereby the wt. % proportions relate to the finished polyamide nanocomposite. According to the invention, packaging materials with high UV absorption and improved gas and aroma barrier effect can be produced by said method. Furthermore, the corresponding packagings the use thereof and moulded bodies produced by means of said method are disclosed.

Abstract: The present invention relates to filled polyamide molding materials, in particular polyamide molding materials with medium filler content, which are producible from a polyamide blend and for example by compounding with chopped or endless fibers on two-screw extruders, and have a combination of reduced water absorption and good mechanical properties, which results in very good dimensional stability and reduced variation of the electrical properties of the produced molded part, such as an antenna housings of stationary or mobile communication devices. The thermoplastic polyamide molding materials according to the present invention are suitable for manufacturing molded parts and other semi-finished or finished parts, for example by extrusion, injection molding, pressing, direct process or direct compounding, respectively, wherein the compounded polyamide molding material is directly processed by injection molding or other shaping methods.

Abstract: A suction blowmold (1) having a cavity (3) formed by two mold halves (9) for producing extrusion suction-blowmolded plastic molded parts (10) using the suction-blowing method, in which an extruded, plastically deformable preform (2) in the form of a plastic melt tube is brought into the closed cavity (3) and in position in the cavity at least partially sliding on the mold surface (5). The suction blowmold (1) according to the present invention is characterized in that at least a part of the mold surface (5) of the cavity (3) has a structuring which provides a reduced sliding friction to the preform (2). A method for producing such a suction blowmold (1), the use thereof for producing extrusion suction-blowmolded plastic molded parts (10), and corresponding extrusion suction-blowmolded plastic molded parts (10) are additionally disclosed.

Abstract: The invention is directed to a transparent mold made of a polyamide molding material containing at least one polyamide formed from at least one diamine selected from the group of hexamethylene diamine (HMDA), bis-(4-amino-3-methylcyclohexyl)methane (MACM) and/or bis-(4-amino-cyclohexyl)methane (PACM) as well as from at least one dicarboxylic acid selected from the group of isophthalic acid (IPS), terephthalic acid (TPS) and/or dodecanedioic acid (DDS) or from the aforementioned diamines and dicarboxylic acids in combination with lactams and/or ?-/?-amino acids.

Abstract: The invention relates to a polymer mixture of partially crystalline aliphatic polyamides and partially aromatic polyamides, the proportion of aliphatic polyamides being more than 50% by weight and the quantitative ratio of the aliphatic carbon atoms to amide bonds in the aliphatic polyamides being in the range of 8:1 to 12:1 and the partially aromatic polyamides, which are present in deficit, having, in addition to hexamethyleneterephthalamide (6T) units, further partially aromatic and/or aliphatic amide units and being predominantly partially crystalline. The invention relates furthermore to the use of polymer mixtures of this type for various application fields, in particular for express couplings or connectors for fuel lines.

Abstract: The present invention relates to thermoplastic polyamide moulding compositions which contain at least one copolyamide with at least 20% by weight polyamide 12 components and at least one aprotic compound selected from the group of N-alkylated, cyclic carboxylic acid amides with 5 to 7 ring elements and/or of urea derivatives, the alkyl rests of which are linear at the nitrogen or which form a linking of the two N-atoms, and a process for production of the moulding compositions. The thermoplastic polyamide moulding compositions are distinguished by the fact that no solid deposits are formed during thermoplastic conversion.

Abstract: A line system (1) for fluids having volatile components, which comprises at least one fluid line (2,3,4), each having a separate inlet (10) and outlet (11), the fluid lines (2,3,4) being enclosed by a first line wall (12) and extending jointly over a section (A) of the line system (1) close-fitting to one another, but being separated from one another at least by the first line wall (12) over the entire length of the fluid lines (2,3,4). The line system (1) is implemented as a plastic hollow profile at least over the section (A) and comprises a further fluid line (8), which is enclosed by a second line wall (13), and comprises one or more line chambers (8?,8??), which are at least partially separated from one another by support webs (7), whose totality at least essentially encloses the fluid lines (2,3,4). In addition, the first and second line walls (12,13) and the support webs (7) of the plastic hollow profile being implemented from the same polymer material.

Abstract: A polyamide molding composition is described, comprising at least one transparent homopolyamide and/or copolyamide in a proportion by weight of from 70 to 99% by weight; at least one further polymer in a proportion by weight of from 1 to 30% by weight; and also optionally further dyes and/or additives. The polyamide molding composition is one wherein the further polymer is a polyesteramide, and wherein the light transmittance to ASTM D1003 of a sheet of thickness 2 mm produced from the polyamide molding composition is at least 88%, and preferably wherein the notched impact resistance of an article produced therefrom is at least 14 kJ/m2.

Abstract: Polyamide polyalkyl(meth)acrylate block copolymers which are built from polyamide generating monomers in addition to 15-70 weight percent polyalkyl(meth)acrylates as well as products produced from same. The block copolymers are produced by producing polyamide or copolyamide blocks with an average molar mass in the range between 500 and 5,000 g/Mol with an amino end group in a first polymerization or polycondensation step and degassing in order to reduce the water content; adding, in a second step, ?,?-functionalized polyalkyl(meth)acrylate diols; and fully condensing the reaction mixture into high-molecular block copolymer (A) at a reduce pressure in a further polycondensation step; discharging it, or further processing it into molding bodies.

Abstract: A polyamide molding composition is described, comprising a proportion by weight of from 50 to 99% by weight of at least one transparent homopolyamide and/or copolyamide, a proportion by weight of from 1 to 50% by weight of at least one further polymer whose glass transition temperature is below 80° C., and also a proportion by weight of from 0.001 to 2.0% by weight of at least one photochromic dye. Further dyes and/or additives can optionally be present. The invention moreover encompasses articles manufactured therefrom, a particular example being photochromic ophthalmic lenses.

Abstract: The present invention relates to reinforced polyamide moulding materials which can be prepared from a polyamide blend and, for example, by compounding with cut fibres or continuous filaments on twin-screw extruders and have mechanical properties which are usually not compatible with one another, namely a combination of exceptionally high rigidity and strength and at the same time good toughness. Furthermore, a high heat distortion temperature (HDT) is achieved according to the invention. The thermoplastic polyamide moulding materials according to the invention are suitable for the production of mouldings or other semifinished products or finished articles, which can be produced, for example, by extrusion, injection moulding, direct methods or direct compounding, in which the compounded polyamide moulding material is processed directly by injection moulding, or other deformation techniques.

Abstract: The present invention relates to reinforced polyamide moulding materials which can be prepared from a polyamide blend and, for example, by compounding with cut fibres or continuous filaments on twin-screw extruders and have mechanical properties which are usually not compatible with one another, namely a combination of exceptionally high rigidity and strength and at the same time good toughness. Furthermore, a high heat distortion temperature (HDT) is achieved according to the invention. The thermoplastic polyamide moulding materials according to the invention are suitable for the production of mouldings or other semifinished products or finished articles, which can be produced, for example, by extrusion, injection moulding, direct methods or direct compounding, in which the compounded polyamide moulding material is processed directly by injection moulding, or other deformation techniques.

Abstract: The present invention relates to a plastic component having a visible part that is made in one single layer from a plastic molding compound and that comprises a transparent or translucent matrix, and having a light source that comprises one or more lamp elements, situated under the surface of the visible part. The visible part is implemented as essentially opaque in relation to daylight and transparent or translucent in relation to the light emitted by the lamp elements. The visible part also contains admixed effect pigments and defines a surface appearance image which, when the light source is inactive, essentially corresponds to the surface appearance image of the remaining wall of an object in which the plastic component is installed and which, when the light source is active, is essentially determined by the light source activity.

Abstract: The invention concerns polyamide molding compositions with good surface quality and good flow behavior containing prepolymeric polyamides with a solution viscosity of ?rel 1.01–1.30 in quantities from 0.1 to 20 wt. %.

Abstract: The present invention relates to the use of thermoplastic polyamide moulding compositions with reduced or strongly reduced formation of solid deposits and/or coverings during a thermoplastic conversion into commodity goods in discontinuous processes in particular injection moulding, and continuous processes such as the extrusion of films, fibers, tubes and jacketings containing at least 20% by weight polyamide and/or at least one copolymer with at least 20% by weight polyamide components.

Abstract: The invention relates to flameproof polyamide moulding compositions, comprising 30-80% by weight of a semi-aromatic, partially crystalline polyamide and 1-30% by weight of a flame retardant containing a phosphinic acid salt and/or a diphosphinic acid salt.

Abstract: A catalyst solution for the anionic polymerization of lactones and/or lactams comprises a salt of at least one compound of the general formula I In this formula (I), R1 is H or an aliphatic, cycloaliphatic or aromatic radical with 1 to 12 C atoms which can also have heteroatoms or hetero groups, the radical R2, which is the same or different, is H, halogen, C1–C5-alkyl, ethoxy or wherein said solvation agent S comprises N-methylpyrrolidone, N-octylpyrrolidone, N-cyclohexylpyrrolidone, N-octylcaprolactam, tetrabutyl urea or mixtures thereof methoxy, and n=1, 2 or 3, and wherein the salt is dissolved in an aprotic solvation agent S.

Abstract: Two-layered or three-layered polymer tubing for use as a pressurized fluid conduit in automobiles can be either walled or have walls continuously or partially corrugated. The tubing has an outer layer of a hard polymer molding material and an inner layer of a soft rubber-like polymer or a polymer mixture. The inner layer can be provided on the innerside with a layer of a thermoplastic adhesion-modified elastomer composition. The a materials are selected for the layers to provide a so-called “hard-soft-combination”. The rubber-like polymer composition has a hardness in the range of 30 Shore A to 60 Shore D, especially of about 30 Shore A to 90 Shore A, the compositions being selected so that they are processable by coextrusion or the so-called conex method and adhere directly to each other non-positively or positively fitted, i. e. without additional bonding agent, without delaminating.

Abstract: A line system (1) for fluids having volatile components, which comprises at least one fluid line (2,3,4), each having a separate inlet (10) and outlet (11), the fluid lines (2,3,4) being enclosed by a first line wall (12) and extending jointly over a section (A) of the line system (1) close-fitting to one another, but being separated from one another at least by the first line wall (12) over the entire length of the fluid lines (2,3,4). The line system (1) is implemented as a plastic hollow profile at least over the section (A) and comprises a further fluid line (8), which is enclosed by a second line wall (13), and comprises one or more line chambers (8?,8??), which are at least partially separated from one another by support webs (7), whose totality at least essentially encloses the fluid lines (2,3,4). In addition, the first and second line walls (12,13) and the support webs (7) of the plastic hollow profile being implemented from the same polymer material.

Abstract: The invention relates to a decomposition-resistant polyamide which is produced by means of anionic polymerisation of at least one lactam in the presence of at least one basic catalyst and optionally at least one activator, a deactivator consisting of a proton donor and an amine being added following the completed polymerization in the melted state.