Abstract: The invention relates to a halogen-free, flame retarder composition for use in a thermoplastic composition, in particular a glassfibre-reinforced polyamide composition, which flame retarder composition contains at least 10-90 mass % phosphinate compound according to formula (I) and/or formula (II) and/or polymers thereof and 90-10 mass % polyphosphate salt of a 1,3,5-triazine compound according to formula (III) and 0-30 mass % olefin copolymer. When used as a flame retarder in glassfibre-reinforced compositions the halogen-free flame retardant composition results in a combination of a V-0 rating according to the UL 94 test of Underwriters Laboratories and excellent mechanical properties. The invention therefore also relates to the use of this flame retarder composition as a flame retarder in a polyamide composition, and a flame retardant polyamide composition that contains the flame retarder composition.

Abstract: The invention relates to a halogen-free, flame retarder composition for use in a thermoplastic composition, in particular a glassfibre-reinforced polyamide composition, which flame retarder composition contains at least 10-90 mass % phosphinate compound according to formula (I) and/or formula (II) and/or polymers thereof and 90-10 mass % polyphosphate salt of a 1,3,5-triazine compound according to formula (III) and 0-30 mass % olefin copolymer. When used as a flame retarder in glassfibre-reinforced compositions the halogen-free flame retardant composition results in a combination of a V-0 rating according to the UL 94 test of Underwriters Laboratories and excellent mechanical properties. The invention therefore also relates to the use of this flame retarder composition as a flame retarder in a polyamide composition, and a flame retardant polyamide composition that contains the flame retarder composition.

Abstract: The invention relates to a halogen-free, flame retarder composition for use in a thermoplastic composition, in particular a glassfibre-reinforced polyamide composition, which flame retarder composition contains at least 10-90 mass % phosphinate compound according to formula (I) and/or formula (II) and/or polymers thereof and 90-10 mass % polyphosphate salt of a 1,3,5-triazine compound according to formula (III) and 0-30 mass % olefin copolymer. When used as a flame retarder in glassfibre-reinforced compositions the halogen-free flame retardant composition results in a combination of a V-0 rating according to the UL 94 test of Underwriters Laboratories and excellent mechanical properties. The invention therefore also relates to the use of this flame retarder composition as a flame retarder in a polyamide composition, and a flame retardant polyamide composition that contains the flame retarder composition.

Abstract: The invention relates to a chain branching agent containing anhydride groups, which chain branching agent contains. (a) 5-75 mass % of a copolymer of at least an unsaturated dicarboxylic acid or a derivative thereof and a vinyl aromatic monomer; (b) 5-75 mass % of a copolymer of acrylonitrile and a vinyl aromatic monomer, (c) 0-80 mass % of an inert processing aid; and (d) 0-10 mass % customary additives; and in which (a) and (b) are miscible, the ratio (a)/(b) is from 1/3 to 3/1, and the total of (a)+(b)+(c)+(d) is 100%. Advantages of this chain branching agent in the preparation of, for instance, a polyamide composition with non-Newtonian melt flow behaviour include better reproducibility and strongly decreased formation of gel particles. The invention also relates to processes for the preparation of a chain branching agent and of a polyamide composition with non-Newtonian melt flow behaviour as well as to the use of such a polyamide composition for the manufacture of moulding articles.

Abstract: The invention relates to a halogen-free, flame retarder composition for use in a thermoplastic composition, in particular a glassfibre-reinforced polyamide composition, which flame retarder composition contains at least 10-90 mass % phosphinate compound according to formula (I) and/or formula (II) and/or polymers thereof and 90-10 mass % polyphosphate salt of a 1,3,5-triazine compound according to formula (III) and 0-30 mass % olefin copolymer. When used as a flame retarder in glassfibre-reinforced compositions the halogen-free flame retardant composition results in a combination of a V-0 rating according to the UL 94 test of Underwriters Laboratories and excellent mechanical properties. The invention therefore also relates to the use of this flame retarder composition as a flame retarder in a polyamide composition, and a flame retardant polyamide composition that contains the flame retarder composition.

Abstract: The invention relates to a polyamide composition for the production of electrical and electronic components that are suitable for the conditions of the surface mounting technology. In particular, the composition exhibits a high resistance to blistering during the reflow soldering process. The composition according to the invention comprises (a) a polyamide having a melting point higher than 280° C., (b) a polymer having a melting point lower than 230° C., (c) a halogen-containing compound, (d) optionally a synergist for the flame-retardant properties (e) reinforcing material (f) optionally other additives. A particularly good resistance to blistering is achieved if (f) contains at least a compound with acid imide groups.

Abstract: The invention is concerned with a flame retardant polyamide composition in which melam is the flame retardant component. Very advantageous are polyamide compositions having a melting temperature of at least 260° C. preferably 280° C. in which for the first time with a non-halogen containing flame retardant at relatively low concentration high flame retardancy ratings can be obtained. Preferably the melam contains less then 2.0% by weight residual catalyst. The compositions are useful for cablecoatings, tubing, films, fibers and electric or electronic components.

Abstract: The invention is concerned with a flame retardant polyamide composition in which melam is the flame retardant component. Very advantageous are polyamide compositions having a melting temperature of at least 260° C. preferably 280° C. in which for the first time with a non-halogen containing flame retardant at relatively low concentration high flame retardancy ratings can be obtained. Preferably the melam contains less than 2.0% by weight residual catalyst. The compositions are useful for cablecoatings, tubing, films, fibers and electric or electronic components.

Abstract: Car part made from a polyamide composition wherein the polyamide substantially consists of 60-99 wt. % units derived from aliphatic dicarboxylic acids and diamines and the remaining chain units are derived from cycloaliphatic dicarboxylic acid(s) and an aliphatic diamine or cycloaliphatic diamine(s) and an aliphatic dicarboxylic acid.

Abstract: The invention relates to a flame retardant polyamide composition comprising at least one polyamide and a polymerized bromostyrene. In particular, the invention relates to polyamide compositions comprising a polymerized bromostyrene with a bromine content of more than 61% (wt).

Abstract: The subject invention relates to a process for preparing a polymer substantially formed from ethylene modified with at least one linear .alpha.,.omega.-diene. In particular, the process involves reacting ethylene with the at least one diene in an inert dispersant. The reaction is carried out in the presence of a magnesium, aluminum, and titanium- and/or vanadium-containing catalyst at a polymerization temperature of at least 135.degree. C. The at least one diene utilized has at least 7 carbon atoms, two non-conjugated double bonds, and is at least 0.001 mole % but less than 0.1 mole % of the total polymer. Furthermore, the at least one diene must be present in an amount small enough such that the activation energy of the viscous flow of the polymer formed is not significantly influenced by the presence of the diene.

Abstract: The disclosed polymers comprise ethylene, one or more higher alkenes-1 having 3-18 carbon atoms in an amount of 0 to 15 mole.-% calculated on the ethylene, and such a small amount of one or more poly-unsaturated compounds having at least 7 carbon atoms and at least two non-conjugated double bonds polymerizable under the influence of transition metal catalysts wherein the activation energy of the viscous flow of the polymer is not significantly influenced by the presence of the poly-unsaturated compound(s).