Composite tubular article consisting of a . . . petrol pipe and

Details Composite tubular article consisting of a . . . petrol pipe and Composite tubular article consisting of a . . . petrol pipe and

1996-04-15

1997-09-02

Nold, Charles

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428421, 4284774, 4284755, 428501, 2642091, 138141, B29C 3506, F16L 1108

Patent

active

056629753

ABSTRACT:
The invention relates to a composite tubular article consisting of a vulcanized elastomer containing carboxylic acid or dicarboxylic acid anhydride functional groups, which is used in combination with a thermoplastic elastomer containing polyamide blocks. The invention also relates to a process for the preparation of such articles, characterized in that a tube consisting of an outer layer of thermoplastic elastomer containing polyamide blocks and optionally an inner layer consisting of a thermoplastic with good liquid-barrier property is sheathed by extrusion at an appropriate temperature of an elastomeric composition comprising a synthetic or natural elastomer containing carboxylic acid or dicarboxylic acid anhydride functional groups, a crosslinking system and optionally various adjuvants and fillers, in that the composite tubular article obtained is vulcanized, preferably at a temperature of between -5.degree. C. and +30.degree. C. in relation to the Vicat point of the said thermoplastic elastomer containing polyamide blocks. This process produces composite tubular articles exhibiting excellent properties, particularly of flexibility and of peel strength of the outer layer.
The invention also relates to petrol pipes consisting of such articles in which the inner face of the thermoplastic tube is coated with a polymer for protection against liquids and preferably against fuels.

REFERENCES:
patent: 4950436 (1990-08-01), Kitami
patent: 5132182 (1992-07-01), Grosse-Puppendahl et al.
Derwent Abstract of Japanese Patent No. 2,217,863.
Derwent Abstract of Japanese Patent No. 4,086,258.
Patent Abstracts of Japan Abstract of Japanese Patent No. 2,217,863.
Patent Abstracts of Japan Abstract of Japanese Patent No. 4,086,258.

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