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US 5,496,878 AGranted
Thermoplastic molding materials based on polyamides and carboxyl-containing polyethylene waxes
AssigneeBASF SE
InventorsWalter Goetz, Walter Betz
Life of this patent
Estimating the term…
Abstract
Thermoplastic molding materials are obtainable by mixing A) from 0.5 to 5% by weight of a carboxyl-containing polyethylene wax having an average molecular weight M.sub.n (number average value) of from 500 to 20,000 and B) from 0 to 50% by weight of fibrous or particulate fillers or mixtures in a melt of C) from 40 to 99.5% by weight of a polyamide prepolymer having a viscosity number of from 40 to 80 ml/g followed by post-condensation in the solid phase.
Claims5
A process for preparing a thermoplastic molding composition which consists essentially of mixing
- A) from 0.5 to 5% by weight based on the total composition of a carboxyl-containing polyethylene wax having an average molecular weight M.sub.n (number average value) from 500 to 20,000 and
- B) from 0 to 50% by weight based on the total composition of fibrous or particulate fillers or mixtures thereof in a melt of
- C) from 40 to 99.5% by weight based on the total composition of a polyamide prepolymer having a viscosity number of from 40 to 80 ml/g (measured in a 0.5% by weight solution in 96% sulfuric acid at 23.degree. C.) followed by post-condensation in the solid phase and wherein the ingredients employed in the process consist essentially of A), B) and C).
Dependencies are inferred from the claim text.