Prevention or reduction of the release of amine and...

Details Prevention or reduction of the release of amine and... Prevention or reduction of the release of amine and...

C - Chemistry, Metallurgy

08

K

C08K 5/29 (2006.01) C08J 3/24 (2006.01)

Patent

CA 2169679

A method of inhibiting amine formation in a vulcanizable elastomeric compound comprising the step of adding to said compound a monofunctional or multifunctional isocyanate having the general formula R-(N=C=O)x where R is an organic radical and x is an integer >= 1, or a compound which forms said isocyanate under the influence of increased temperature during vulcanization of said mixture, said isocyanate being a uretdione or an isocyanate blocked with a blocking agent R' - H, where R' is an organic radical, and wherein the reactivity of said blocking agent with said isocyanate is lower than the corresponding reactivity of the amines to be inhibited. The use of such isocyanates provides for prevention or at least substantial reduction of the release of N-nitrosamines during manufacture, storage, installation and use of elastomers.

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