Fuel part and process for producing of a fuel part

Patent metadata

Field	Value
Publication number	US-9309406-B2
Application number	US-201113812195-A
Country	US
Kind code	B2
Filing date	Jul 21, 2011
Priority date	Jul 26, 2010
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

This invention relates to a fuel part, comprising a polymer composition comprising: i. a polyamide A in which the ratio of terminal carboxy group concentration over terminal amino group concentration of the polyamide A is equal to 1 or higher, and ii. micro talcum in an amount of 0.001 to 1 weight percent with respect to the total amount of the polymer composition, and iii. an impact modifier in an amount of at least 1.0 weight percent with respect to the total amount of the polymer composition. This invention also relates to a process for producing a fuel part.

First claim

The invention claimed is:

1. A fuel part for contact with a hydrocarbon fuel, wherein the fuel part is formed of a polymer composition comprising:
(i.) at least 80 wt. % based on total weight of the polymer composition of at least one aliphatic polyamide selected from the group consisting of polyamide-6 (PA6), polyamide-66 (PA66), polyamide-410 (PA410) and polyamide-46 (PA46) having a ratio of terminal carboxy group concentration over terminal amino group concentration which is equal to 1 or higher,
(ii.) 0.001 wt. % to 0.8 wt. % based on total weight of the polymer composition of a micro talcum having a median diameter of less than 1 micrometer; and
(iii.) 5 wt. % to 50 wt. % based on total weight of the polymer composition of an impact modifier, wherein
the fuel part is selected from the group consisting of fuel containers, fuel canisters, fuel caps and fuel hoses, and wherein
the fuel part exhibits a fuel permeation rate for the hydrocarbon fuel measured by a weight loss method according to ASTM E96BW using ASTM fuel CE10 which is less than a comparable fuel part formed of an identical polymer composition not containing the micro talcum.

2. The fuel part according to claim 1 , wherein the micro talcum is present in an amount between 0.01 to 0.5 weight percent based on the total amount of the polymer composition.

3. The fuel part according to claim 1 , wherein the micro talcum is present in an amount between 0.01 to 0.2 weight percent based on the total amount of the polymer composition.

4. The fuel part according to claim 1 , wherein the ratio of terminal carboxy group concentration over terminal amino group concentration of the aliphatic polyamide is at least 1.1.

5. The fuel part according to claim 1 , wherein the ratio of terminal carboxy group concentration over terminal amino group concentration of the aliphatic polyamide is at least 1.2.

6. The fuel part according to claim 1 , wherein the impact modifier is a maleic anhydride functionalized polyolefin.

7. The fuel part according to claim 1 , further comprising glass fibers in an amount between 5 to 60 wt % based on the total amount of polymer composition.

8. A process for producing the fuel part according to claim 1 , wherein the process comprises injection molding the polymer composition to produce the fuel part.

Assignees

• Tomic Katarina
• Dullaert Konraad
• Van Der Vegte Eric Willem
• Dsm Ip Assets Bv

Inventors

• Tomic Katarina
• Dullaert Konraad
• Van Der Vegte Eric Willem

Classifications

• B60K15/03177

  made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material (B60K15/03006 takes precedence) · CPC title

• C08K3/34

  Silicon-containing compounds · CPC title

• C08L77/02 Primary

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• B60K2015/03493

  made of plastics · CPC title