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 a novel polyamide molding material for highly lustrous and rigid polyamide molded articles that contains a polyamide mixture consisting of a semicrystalline linear polyamide, a special branched graft polyamide, an amorphous polyamide, reinforcing substances as well as conventional additives.

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 concerns a transparent polyamide alloy, produced by compounding it from 30-98% by weight of a transparent, amorphous, rigid and brittle polyamide A with at least 35 mole % cyclo-aliphatic diamine and a glass transition point of at least 150° C., and 2-70% by weight of a transparent, impact resistant polyamide B with at least 40-80 mole % of at least one long-chain polyamide-forming monomer, with more than 10 carbon atoms and at least 10 mole % terephthalic acid and a glass transition point of under 70° C.

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

Abstract: The invention concerns anti-static, peroxide-stable molding compounds on the basis of polyamides and/or polyesters, whereby the molding compounds are modified with very pure conductive carbon black with a low specific surface area. These anti-static molding compounds can be used for the production of injection-molded or extruded parts and the production of sheets or multi-layer hoses and tubes.

Abstract: The invention concerns a transparent polyamide alloy, produced by compounding it from 30-98% by weight of a transparent, amorphous, rigid and brittle polyamide A with at least 35 mole % cyclo-aliphatic diamine and a glass transition point of at least 150° C., and 2-70% by weight of a transparent, impact resistant polyamide B with at least 40-80 mole % of at least one long-chain polyamide-forming monomer, with more than 10 carbon atoms and at least 10 mole % terephthalic acid and a glass transition point of under 70° C.

Abstract: The invention relates to a reversible thermotropic plastics molding compound. Thermotropic molding compounds of this kind are used, amongst other things, for glass and coverings for shading and light/heat regulation in houses, cars, etc. The molding compound according to the invention consists of two compounds which are not thermodynamically miscible with one another. The first component consists of a plastics material, while the second component is not liquid-crystalline and has a refractive index which is the same as the first component in the transparent range and the temperature dependency of which is different from the temperature dependency of the refractive index of the first component. On raising the temperature, the transmission of the molding compound is thus altered.

Abstract: The invention relates to novel thermoplastic multi-layer composites comprising at least a) a layer formed from a molding compound based on a polyamide and b) a second layer formed from a molding compound based on a linear alternating polyketone polymer from carbon monoxide and an ethylenically unsaturated hydrocarbon compound, at least part of which layer b) is adjacent to layer a).

Abstract: A polyamide composition which is flame-retardant, includes several polyamides; and at least one flame-retarding additive which is at least one alkyl phosphonic acid compound having general formula (I):

Abstract: The invention relates to a polymer blend composition containing (A) a linear alternating polyketone polymer on the basis of carbon monoxide and at least one ethylenically unsaturated hydrocarbon compound, (B) at least one polyamide and/or block copolyester amide, (C) optionally customary auxiliaries and additives such as stabilizers, pigments, fillers, plasticizers and impact modifiers, the polyamide and/or the block copolyester amide (B) having a carboxyl/amino end-groups ratio of more than 1.

Abstract: A polyamide composition which is amorphous and transparent, which has reduced flammability, and which has reduced migration of flame-retardant additive so that it is film-free, includes at least one polyamide which contains cycloaliphatic monomer units and which is amorphous and transparent; and a flame-retardant additive which is present in an amount effective to reduced flammability of the polyamide composition, which is dissolved in the at least one polyamide, and which is at least one alkyl phosphonic acid compound having a general formula: ##STR1## wherein R and R' each represent, independent of each other, an alkyl group having from 1 to 4 carbon atoms, and x=0 or 1. An article molded from this composition is transparent, has reduced flammability, and has reduced migration of flame-retardant additive so that it is film-free.

Abstract: A polyamide composition which is amorphous and transparent, which has reduced flammability, and which has reduced migration of flame-retardant additive so that it is film-free, includes at least one polyamide which contains cycloaliphatic monomer units and which is amorphous and transparent; and a flame-retardant additive which is present in an amount effective to reduced flammability of the polyamide composition, which is dissolved in the at least one polyamide, and which is at least one alkyl phosphonic acid compound having a general formula: ##STR1## wherein R and R' each represent, independent of each other, an alkyl group having from 1 to 4 carbon atoms, and x=0 or 1. An article molded from this composition is transparent, has reduced flammability, and has reduced migration of flame-retardant additive so that it is film-free.

Abstract: A partially aromatic copolyamide is formed of:(a) 5 to 30 weight-% of hexamethylene diamine(b) 10 to 40 weight-% of metaxylylene diamine(c) 15 to 50 weight-% of adipic acid(d) 5 to 45 weight-% of at least one aliphatic dicarboxylic add with 7 to 10 carbon atoms, preferably sebacic acid and/or acelaic acid, wherein the components (a) to (d) add up to 100 weight-%, and the add groups and the amine groups are essentially present in equimolar portions. These novel copolyamides are used for producing barrier layers for mono- or multi-layered composites, such as foils or containers, infusion- or ostomy bags, shrink wraps for meat, fish and cheese packagings or sausage skins, wherein the copolyamides can be present in the pure form or as a mixture with other polymers, in particular in combination with further polymer layers.

Abstract: A copolyamide composition and article molded therefrom, the molded article being transparent, being especially rigid, tough and cold impact resistant, having good resistance to solvents, and exhibiting negligible changes in mechanical properties in the conditioned state due to very low water absorption. The copolyamide composition including long-chain monomer building blocks and being comprised of from about 30 to about 96 parts by weight of at least one long-chain monomer which is suitable as a long-chain building block for a polyamide and which has from 9 to 12 carbon atoms; and from about 4 to about 70 parts by weight of precursor monomers for semiaromatic polyamides, which precursor monomers comprise at least one diamine, H.sub.2 N--R--NH.sub.

Abstract: The invention relates to a barrier layer resisting the transmission of oxygen for multi-layer barrier film characterized in that it is made of a transparent copolyamide comprising three components. The first component is hexamethylenediamine and adipic acid. The second component is hexamethylenediamine and azelaic acid, hexamethylenediamine and sebacic acid, and mixtures thereof. The third component is hexamethylene-diamine and isophthalic acid, hexamethylenediamine and terephthalic acid, and mixtures thereof. The total of all components is 100 mol %, and the ratio of the barrier effects in the barrier layer with respect to carbon dioxide and oxygen is at least 3:1.

Abstract: A polyamide-containing polymer mixture having a melt viscosity of 1,000 to 1,400 Pa.multidot.s (at 270.degree. C. and under a load of 122.6 N) and includes the following components:(A) 50 to 75 parts by weight of polyamide 6, polyamide 6,6, polyamide 12 or mixtures thereof;(B) 15 to 30 parts by weight of a polyolefin having a density of 0.921 to 0.96 g/cm.sup.3 onto which an unsaturated carboxylic acid or an unsaturated carboxylic acid derivative has been grafted, the degree of grafting being between 0.01 and 1 weight percent, with respect to the total weigh of grafted and ungrafted polyolefin;(C) 10 to 20 parts by weight of a grafted polyolefin elastomer including at least ethylene and propylene units;(D) Additives selected from the group including stabilizers, anti-friction agents and fillers,with the sum of the parts by weight of components (A) to (D) being 100, and the mixture being produced by mixing components (A), (B) and (D) or (A), (B), (C) and (D) and extruding them at 150 to 300 rpm.

Abstract: The invention relates to a barrier layer resisting the transmission of oxygen for multi-layer barrier film characterized in that it is made of a transparent copolyamide comprising three components. The first component is hexamethylenediamine and adipic acid. The second component is hexamethylenediamine and azelaic acid, hexamethylenediamine and sebacic acid, and mixtures thereof. The third component is hexamethylene-diamine and isophthalic acid, hexamethylenediamine and terephthalic acid, and mixtures thereof. The total of all components is 100 mol %, and the ratio of the barrier effects in the barrier layer with respect to carbon dioxide and oxygen is at least 3:1.

Abstract: Copolyamide barrier layers which are durable hot-water stable and transparent. The copolyamide is amorphous and partially aromatic, and comprises(a) 50 molar parts of substituted or unsubstituted aromatic dicarboxylic acids which are replaced by up to 60% by weight of at least one additional dicarboxylic acid selected from the group consisting of cycloaliphatic dicarboxylic acids having 8 to 24 carbon atoms, araliphatic dicarboxylic acids having 8 to 18 carbon atoms, and mixtures thereof, and (b) 50 molar parts of hexamethylene diamine, which is replaced by up to 60% by weight of at least one additional diamine, selected from the group consisting of substituted or unsubstituted aliphatic diamines having 4 to 20 carbon atoms, substituted cycloaliphatic diamines having 6 to 24 carbon atoms, araliphatic diamines having 8 to 18 carbon atoms, and mixtures thereof,the acid groups and amino groups being present substantially in equimolar proportions.

Abstract: The invention concerns anti-static, peroxide-stable molding compounds on the basis of polyamides and/or polyesters, whereby the molding compounds are modified with very pure conductive carbon black with a low specific surface area. These anti-static molding compounds can be used for the production of injection-molded or extruded parts and the production of sheets or multi-layer hoses and tubes.