US 2007/0167552 A1 · Polyamide moulding materials for the production of moulded articles having reduced surface carbonization

Abstract

Moulded articles having reduced surface carbonization and longer retention of the mechanical properties and methods of producing same are presented. In an embodiment, the moulded article comprises polyamides with nanofillers, which can be produced by means of injection moulding or extrusion, in particular by extrusion blow moulding, coextrusion blow moulding or sequential blow moulding with and without 3D hose manipulation. For example, the polyamide moulding materials for the production of moulded articles have reduced surface carbonization in the moulded articles in subsequent long-term use at elevated temperatures.

Claims52

Dependent claims

A method of producing a moulded article, the method comprising:

providing at least one thermoplastic polymer selected from the group consisting of polyamides and combinations thereof,
combining the thermoplastic polymer with at least one nano-scale filler that is less than 500 nm in at least one dimension to produce a moulding material, wherein the nano-scale filler ranges in an amount from about 0.5 to about 15% by weight of the total weight of the moulding material;
and
forming the moulded article from the moulding material, wherein the molded article has a longer retention of mechanical properties and a reduced surface carbonization when the moulded article is used at a temperature above 135° C. in comparison with a moulded article comprising the same polyamide that contains no nano-scale fillers.

1 more element

A moulding material suitable for an extrusion blow moulding process comprising:

(a) at least one thermoplastic polymer selected from the group consisting of polyamides and combinations thereof;
(b) at least one nano-scale filler having a particle size of less than 500 nm in at least one dimension, the nano-scale filler in an amount of 0.5 to 15% by weight of the total weight of the moulding material,
(c) at least one fibrous filler material in amounts up to about 65% by weight of the total weight of the moulding material, preferably about 5 to about 30% by weight, and
(d) at least one impact modifier in an amount from about 0 to about 25% by weight, preferably about 3 to about 12% by weight, of the total weight of the moulding material, wherein a molded article produced from said moulding material has a longer retention of mechanical properties (elongation at break and/or ultimate tensile strength) and a reduced surface carbonization when the moulded article is used at a temperature above 135° C. in comparison with a moulded article comprising the same thermoplastic polymer that contains no nano-scale fillers.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

11/583,437Filed 17 Oct 2006

Priority

DE 10239326.527 Aug 2002

Published

19 Jul 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08J 5/005
Manufacture of articles or shaped materials containing macromolecular substances: reinforced macromolecular compounds with nanosized materials,…
B82Y 30/00
Nanotechnology for materials or surface science
C08J 2377/00
Working-up: characterised by the use of polyamides obtained by reactions forming a
C08J
Working-up

Polyamide moulding materials for the production of moulded articles having reduced surface carbonization

Life of this patent

Polyamide moulding materials for the production of moulded articles having reduced surface carbonization

Life of this patent

Abstract

Claims52