US 9,751,996 B2 · Polyamide resin composition with high heat resistance and oxidation resistance

Abstract

The present invention relates to a polyamide resin composition having substantially improved heat resistance and oxidation resistance. The polyamide resin composition comprises a polyamide copolymer having high heat resistance and high rigidity, glass fiber, citric acid and ethylenediaminetetraacetic acid (EDTA) which can rapidly cause surface oxidation with glass fiber, such that a highly dense oxide film can be formed on a polymer surface at high temperatures for a long time. Accordingly, the polyamide resin composition of the present invention can prevent oxidation and thermal decomposition by exterior oxygen and heat, and have substantially improved physical properties such as impact strength, tensile strength, flexural strength and elongation.

Claims10

Dependent claims

A polyamide resin composition, comprising:

an amount of about 56 to 69% by weight of a polyamide copolymer represented by the following Formula 1;
an amount of about 30 to 40% by weight of a glass fiber;
an amount of about 0.5 to 2% by weight of citric acid;
and
an amount of about 0.5 to 2% by weight of ethylenediaminetetraacetic acid (EDTA),
all the % by weights are based on the total weight of the polyamide resin composition,
wherein n and m are same or different positive integers,
wherein the PA6T is hexamethylene terephthalamide, and
wherein the PA66 is hexamethylene adipamide.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/190,934Filed 23 Jun 2016

Priority

KR 10-2015-018292421 Dec 2015

Published

US 2017/0174851 A122 Jun 2017

Granted

5 Sep 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C08J 5/10
Reinforcing macromolecular compounds with loose or coherent fibrous material: characterised by the additives used in the polymer mixture
C08G 69/265
Derived from polyamines and polycarboxylic acids: from at least two different diamines or at least two different dicarboxylic acids
C08J 5/043
With inorganic fibres: with glass fibres
C08K 5/092
Carboxylic acids; Metal salts thereof; Anhydrides thereof: polycarboxylic acids

Polyamide resin composition with high heat resistance and oxidation resistance

Life of this patent

Polyamide resin composition with high heat resistance and oxidation resistance

Life of this patent

Abstract

Claims10