Vulcanization of dip-molded rubber articles with molten...

Details Vulcanization of dip-molded rubber articles with molten... Vulcanization of dip-molded rubber articles with molten...

C - Chemistry, Metallurgy

08

J

C08J 5/02 (2006.01) B29C 41/14 (2006.01) C08J 3/24 (2006.01) C08J 5/18 (2006.01) C08L 7/02 (2006.01) C08L 11/02 (2006.01)

Patent

CA 2405723

Pore-free rubber articles are prepared by dip-molding in a dipping medium that includes a vulcanizing agent, then by immersing the dip former in a heated liquid bath that is chemically inert. A particularly effective liquid bath is molten inorganic salt. In addition, the tensile properties of an article of vulcanized rubber can be improved to an unusually effective degree by immersing the already vulcanized article in a solution of a vulcanizing agent to cause the rubber of the article to absorb or imbibe the vulcanizing agent from the solution, and then immersing the rubber and the imbibed vulcanizing agent in a heated liquid bath to increase the degree of vulcanization.

L'invention concerne des articles en caoutchouc exempts de pores, qui sont obtenus par moulage au trempé dans un milieu de trempage contenant un agent de vulcanisation, puis par immersion de la forme de trempage dans un bain liquide chauffé qui est chimiquement inerte. Du sel inorganique fondu constitue un bain liquide particulièrement efficace. De plus, les propriétés en traction d'un article de caoutchouc vulcanisé peuvent être améliorées à un degré d'efficacité exceptionnel par une immersion de l'article vulcanisé dans une solution d'agent de vulcanisation, afin que l'article en caoutchouc absorbe ou s'imbibe de l'agent de vulcanisation présent dans la solution ; et par une immersion ultérieure du caoutchouc et de l'agent de vulcanisation imbibé dans un bain liquide chauffé pour accroître le degré de vulcanisation.

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