Castable polyurethane elastomers for industrial rollers

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/65 (2006.01) C08G 18/69 (2006.01)

Patent

CA 2281219

The present invention relates to polyurethane elastomer systems for industrial and paper mill rolls and more particularly to polyurethane covered rolls made from a new polyurethane composition of a polyurethane prepolymer cured with an aromatic diamine and a hydroxyl-terminated polybutadiene resin. Rolls made with this new polyurethane composition exhibit improved dynamics, hydrolytic stability, and reduced water vapor transmission over conventional polyurethane elastomer systems.

L'invention concerne des systèmes élastomères à base de polyuréthanne pour rouleaux utilisés dans l'industrie et la papeterie, et plus particulièrement pour rouleaux couverts de polyuréthanne fabriqués à partir d'une nouvelle composition de polyuréthanne à base de prépolymère pour polyuréthannes durci par une diamine aromatique et de résine de polybutadiène à terminaison hydroxyle. Les rouleaux fabriqués avec ladite composition offrent une dynamique et une stabilité hydrolytique améliorées et une transmission de la vapeur d'eau réduite par rapport aux systèmes élastomères classiques.

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