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US 2002/0119267 A1Published application
Molding composition with good capability for blow molding
AssigneeDegussa AG
InventorsMartin Himmelmann, Wilfried Bartz, Franz-Erich Baumann, Guido Schmitz, Georg Oenbrink, Harald Haeger, Ralf Richter
Life of this patent
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Abstract
A molding composition of at least 50% by weight of a polyamine-polyamide copolymer obtained from 0.05 to 2.5% by weight of a polyamine having at least 4 nitrogen atoms and having a viscosity of at least 5 000 Pa•s at 250° C. and at a shear rate of 0.1 l/s, and having a viscosity ratio of at least 7 at 250° C., when the melt viscosities at shear rates of 0.1 l/s and 100 l/s are compared with one another, has high melt stiffness and is easy to cut, and performs well in blow molding.
Claims12
A molding composition, comprising:
- at least 50% by weight of a polyamine-polyamide copolymer;
- wherein said molding composition is obtained from the following monomers:
- a) from 0.05 to 2.5% by weight of a polyamine having at least 4 nitrogen atoms based on the polyamine-polyamide copolymer, and
- b) a polyamide-forming monomer selected from the group consisting of a lactam, a ω-aminocarboxylic acid, an equimolar combination of a diamine and a dicarboxylic acid and a mixture thereof;
- wherein the polyamine-polyamide copolymer has the following properties:
- a viscosity of at least 5 000 Pa•s at 250° C. and at a shear rate of 0.1 l/s;
- and
- a viscosity ratio of at least 7 at 250° C., when the melt viscosities at shear rates of 0.1 l/s and 100 l/s are compared with one another.
5 more elements
Dependencies are inferred from the claim text.