Fuel part and process for preparation of a fuel part

Patent metadata

Field	Value
Publication number	US-9512292-B2
Application number	US-201113812314-A
Country	US
Kind code	B2
Filing date	Jul 21, 2011
Priority date	Jul 26, 2010
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The present invention relates to a fuel part, comprising a polymer composition comprising: i. a polyamide A, and ii. micro talcum in an amount of 0.001 to 1 weight percent with respect to the total amount of the polymer composition, wherein the polymer composition has a melt volume flow rate (MVR) of at most 70 cm 3 /10 min at a weight of 21.6 kg and at a temperature of T measure as measured according to ISO 1133. The invention also relates to a process for preparation of such fuel part wherein a blow-molding or roto-molding process is applied.

First claim

The invention claimed is:

1. A blow-moulded or roto-moulded fuel part, wherein the fuel part is formed of a polymer composition comprising:
i. a polyamide A which is at least one polyamide selected from the group consisting of polyamide-6 (PA-6) and polyamide-66 (PA-66), and
ii. an amount of 0.05 to 0.5 weight percent with respect to the total amount of the polymer composition of micro talcum having a median diameter of less than 0.6 μm, wherein
the polymer composition has a melt volume flow rate (MVR) of at most 70 cm 3 /10 min at a weight of 21.6 kg and at a temperature of T measure as measured according to ISO 1133, and wherein
the polyamide A has a ratio of terminal carboxy group concentration to terminal amino group concentration which is equal to or greater than 1, and wherein
the fuel part exhibits a fuel permeation rate for a hydrocarbon fuel measured by a weight loss method according to ASTM E96BW using ASTM fuel CE10 which is at least 36% 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 MVR is at most 60 cm 3 /10 min.

3. The fuel part according to claim 1 , wherein the MVR is at most 50 cm 3 /10 min.

4. The fuel part according to claim 1 , wherein the amount of micro talcum is between 0.05 to 0.2 weight percent with respect to the total amount of the polymer composition.

5. The fuel part according to claim 1 , wherein the amount of micro talcum is between 0.05 to 0.1 weight percent with respect to the total amount of the polymer composition.

6. The fuel part according to claim 1 , wherein the polymer composition further comprises a polyamide B, wherein the polyamide B is polyamide-410 (PA410) in an amount of at least 0.1 wt % based on the total amount of the polymer composition.

7. A process for preparation of a fuel part according to claim 1 , wherein the process comprises forming the fuel part by blow-molding the polymer composition.

8. A fuel part which formed of a blow-moulded or roto-moulded polymer composition comprising:
i. a polyamide A which comprises at least one polyamide selected from the group consisting of polyamide polyamide-6 (PA-6) and polyamide-66 (PA-66), and
ii. an amount of 0.04 to 0.2 weight percent with respect to the total amount of the polymer composition of micro talcum having a median diameter of less than 0.6 μm, wherein
the polymer composition has a melt volume flow rate (MVR) of at most 70 cm 3 /10 min at a weight of 21.6 kg and at a temperature of T measure as measured according to ISO 1133, and wherein
the polyamide A has a ratio of terminal carboxy group concentration to terminal amino group concentration which is equal to or greater than 1, wherein
the fuel part exhibits a fuel permeation rate (P) of 2.4 gmm/m 2 day or less measured according to ASTM E96BW using ASTM fuel CE10.

9. The fuel part according to claim 8 , further comprising a blend of the polyamide A with a polyamide B, wherein the polyamide B is polyamide-410 (PA-410).

10. The fuel part according to claim 9 , wherein the polyamide B is present in an amount of at least 0.1 wt % based on the total amount of the polymer composition.

11. The fuel part according to claim 8 , wherein the MVR is at most 60 cm 3 /10 min.

12. The fuel part according to claim 8 , wherein the MVR is at most 50 cm 3 /10 min.

13. A process for preparation of a fuel part according to claim 8 , wherein the process comprises forming the fuel part by blow-molding the polymer composition.

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

• B29C49/0005

  characterised by the material · CPC title

• C08L77/02

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

• C08L77/06

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• C08K3/34 Primary

  Silicon-containing compounds · CPC title

• C08K7/14

  Glass · CPC title