Polyamide composite resin composition for fuel filler pipe

Patent metadata

Field	Value
Publication number	US-9902854-B2
Application number	US-201615220031-A
Country	US
Kind code	B2
Filing date	Jul 26, 2016
Priority date	Dec 14, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A polyamide composite resin composition for a fuel filler pipe includes 41 to 77% by weight of polyamide 6, 5 to 15% by weight of m-xylenediamine (MXD)-based modified nylon, 14 to 30% by weight of a maleic anhydride-grafted ethylene-octene copolymer, a maleic anhydride-grafted ethylene-propylene-diene monomer, or a mixture thereof, and 3 to 10% by weight of mixed clay.

First claim

What is claimed is:

1. A polyamide composite resin composition for a fuel filler pipe, the polyamide composite resin comprising:
41 to 77% by weight of polyamide 6;
5 to 15% by weight of m-xylenediamine (MXD)-based modified nylon;
14 to 30% by weight of a maleic anhydride-grafted ethylene-octene copolymer, a maleic anhydride-grafted ethylene-propylene-diene monomer, or a mixture thereof; and
3 to 10% by weight of mixed clay.

2. The polyamide composite resin composition according to claim 1 , wherein the m-xylenediamine (MXD)-based modified nylon is one or more selected from the group consisting of m-xylenediamine 6 nylon, aromatic nylon and amorphous nylon.

3. The polyamide composite resin composition according to claim 1 , wherein the mixed clay is immobilization-pretreated through mixing with two or more selected from the group consisting of tabular montmorillonite, hectorite, saponite and vermiculite.

4. The polyamide composite resin composition according to claim 3 , wherein, in the immobilization pretreatment, pre-treatment into an organic material comprising one or more functional groups selected from the group consisting of primary to quaternary ammonium, phosphonium, maleate, succinate, acrylate, benzylic hydrogen, dimethyl distearyl ammonium and oxazoline is performed.

5. The polyamide composite resin composition according to claim 1 , wherein the polyamide composite resin composition further comprises one or more selected from the group consisting of stearic acid, stearyl alcohol, and stearamide in an amount of 0.3 to 1.0% by weight.

6. The polyamide composite resin composition according to claim 1 , wherein the polyamide composite resin composition further comprises one or more thickeners selected from the group consisting of vinyl, epoxy, methacryloxy, amino, mercapto, acryloxy, isocyanate, styryl and alkoxy oligomers in an amount of 0.3 to 1.0% by weight.

7. The polyamide composite resin composition according to claim 1 , wherein the polyamide composite resin composition further comprises one or more heat stabilizers selected from the group consisting of sodium halides, potassium halides, and lithium halides in an amount of 0.3 to 1.0% by weight.

8. The polyamide composite resin composition according to claim 1 , wherein the polyamide composite resin composition further comprises one or more heat stabilizers selected from the group consisting of cuprous halides, and cuprous iodine compounds in an amount of 0.3 to 1.0% by weight.

9. The polyamide composite resin composition according to claim 1 , wherein the polyamide composite resin composition further comprises one or more heat stabilizers selected from the group consisting of hindered phenols, hydroquinones, and aromatic amines in an amount of 0.3 to 1.0% by weight.

10. The polyamide composite resin composition according to claim 1 , wherein a maleic acid-based resin or an epoxy-based resin is contained in an amount of 0.01 to 15% by weight in the polyamide 6 so as to increase a molecular weight of polyamide.

11. The polyamide composite resin composition according to claim 1 , wherein aromatic-based nylon is contained in the polyamide 6 in an amount of 0.01 to 15% by weight so as to enhance barrier properties.

Assignees

• Hyundai Motor Co Ltd
• Shinil Chemical Ind Co Ltd
• Korea Fuel Tech Corp

Inventors

• Youn Jee Young
• Ryu Dong Yol
• Lee Dong Chul
• Kwon Bo Ram
• Kim Ki Hong
• Seo Keum Suk
• Choi Cheol Kyu

Classifications

• C08L2201/14

  Gas barrier composition · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• B29B9/06

  in the form of filamentary material, e.g. combined with extrusion · CPC title

• B29B13/065

  of powder or pellets · CPC title