Multilayer tube

Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing

Reexamination Certificate

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C428S035700, C428S036900

Reexamination Certificate

active

08067075

ABSTRACT:
A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.

REFERENCES:
patent: 5554425 (1996-09-01), Krause et al.
patent: 5670608 (1997-09-01), Oka et al.
patent: 5750626 (1998-05-01), Shimizu et al.
patent: 5869157 (1999-02-01), Stoeppelmann
patent: 6656553 (2003-12-01), Nishi et al.
patent: 6794048 (2004-09-01), Schmitz et al.
patent: 2003/0012906 (2003-01-01), Suzuki
patent: 2003/0050376 (2003-03-01), Oka et al.
patent: 2004/0077775 (2004-04-01), Audenaert et al.
patent: 1 470 910 (2004-10-01), None
patent: 5-245988 (1993-09-01), None
patent: 5-247478 (1993-09-01), None
patent: 6-234190 (1994-08-01), None
patent: 7-96564 (1995-04-01), None
patent: 07173447 (1995-07-01), None
patent: 7-507739 (1995-08-01), None
patent: WO 01/94829 (2001-12-01), None
Machine Translation of JP 07173447 (Jul. 1995).

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