Multilayer hose for the transportation of high-temperature...

B - Operations – Transporting – 32 – B

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B32B 1/08 (2006.01) B32B 27/34 (2006.01) F16L 11/04 (2006.01)

Patent

CA 2564762

Disclosed is a multilayer hose for transporting high-temperature chemicals and/or gases which is composed of at least two or more layers including a layer (a) composed of an aliphatic polyamide (A) and a layer (b) composed of a semi-aromatic polyamide (B) comprising diamine units containing not less than 60 mol% of aliphatic diamine units having 9-13 carbon atoms relative to the total diamine units and dicarboxylic acid units containing not less than 50 mol% of terephthalic acid units and/or naphthalene dicarboxylic acid units relative to the total dicarboxylic acid units. This multilayer hose for transporting high-temperature chemicals and/or gases is excellent in hot water resistance, chemical resistance, durability, interlayer adhesion, and chemical and/or gas permeation barrier properties, in particular chemical and/or gas permeation barrier properties at high temperatures.

Est présenté un tuyau multicouches pour transporter des produits chimiques à forte températures et/ou des gaz et qui est composé d'au moins deux couches comprenant une couche (a) composée d'un polyamide aliphatique (A) et une couche (b) composée d'un polyamide semi-aromatique (B) comprenant des unités de diamine contenant au moins 60% mol d'unités de diamine aliphatique ayant de 9 à 13 atomes de carbone relativement au total des unités de diamine et d'unités d'acide dicarboxylique contenant un minimum de 50% mol d'unités d'acide téréphtalique et/ou d'unités d'acide dicarboxylique relativement au total des unités d'acide dicarboxylique. Ce tuyau multicouches pour transporter des produits chimiques haute température et/ou des gaz est excellent en matière de résistance à l'eau et aux produits chimiques, de durabilité, d'adhésion entre couches et de propriétés de barrière de perméation des produits chimiques et/ou du gaz, en particulier de propriétés de barrière de perméation des produits chimiques et/ou du gaz sous de hautes températures.

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