Articles with low hydrogen permeation and their use

Details Articles with low hydrogen permeation and their use Articles with low hydrogen permeation and their use

C - Chemistry, Metallurgy

08

L

C08L 83/16 (2006.01) C09D 183/16 (2006.01)

Patent

CA 2694246

The invention relates to use of a moulding, moulded from a composition encompassing (A) a thermoplastic, and a coating provided thereon, moulded from a composition encompassing a component (B) which has been selected from a polysilazane of the formula (- SiR'R"-NR"'-)n, where either R', R" and R"' = -H or R' and R"' = - H; and R" = -methyl, as articles with low hydrogen permeation, where the permeation coefficient of the article with respect to hydrogen gas at from 25 to 30°C is preferably smaller than 10 cm3 mm/ m2 d atm, measured in accordance with DIN 53380-3 and ASTM D 3985, and their microhardness is greater than 150 N/mm2 to DIN EN ISO 14577. The invention further relates to articles with low hydrogen permeation encompassing a moulding moulded from a composition encompassing (A) a thermoplastic, and a coating provided thereon, moulded from a composition encompassing a component (B) which has been selected from a polysilazane of the formula (- SiR'R"-NR"'-)n, where either R', R" and R"' = -H or R' and R"' = -H; and R" = -methyl

L'invention concerne l'utilisation d'une pièce moulée à partir d'une composition comprenant (A) une matière thermoplastique recouverte d'un revêtement lui-même moulé à partir d'une composition comprenant un composant (B) qui est un polysilazane de formule (- SiR'R"-NR'"-)n dans laquelle soit R', R" et R'" = sont -H, soit R et R"' sont -H et R" est -méthyle. La dite pièce moulée est utilisée en tant qu'article à faible perméation de l'hydrogène, l'article ayant de préférence un coefficient de perméation vis-à-vis du gaz hydrogène à une température de 25 à 30 °C qui est inférieur à 10 cm3 mm/ m2 d atm, mesuré selon DIN 53380-3 et ASTM D 3985, et une microdureté supérieure à 150 N/mm2 selon DIN EN ISO 14577. L'invention concerne également des articles à faible perméation de l'hydrogène, comprenant une pièce moulée à partir d'une composition comprenant (A) une matière thermoplastique recouverte d'un revêtement lui-même moulé à partir d'une composition comprenant un composant (B) qui est un polysilazane de formule (- SiR'R"-NR'"-)n dans laquelle soit R', R" et R'" = sont -H, soit R et R"' sont -H et R" est -méthyle.

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