Antioxidant compositions

Details Antioxidant compositions Antioxidant compositions

C - Chemistry, Metallurgy

09

K

C09K 15/08 (2006.01) C09K 15/20 (2006.01) C09K 15/24 (2006.01) C10M 129/10 (2006.01) C10M 133/04 (2006.01) C10M 141/06 (2006.01)

Patent

CA 2042517

A cost-effective antioxidant composition which exhibits good compatibility toward fluoroelastomers comprises a combination of (i) an oil soluble mixture of sterically-hindered tertiary alkylated monohydric phenols, (ii) an oil-soluble mixture of sterically-hindered tertiary alkylated methylene-bridged poly-phenols, and (iii) at least one oil-soluble aromatic secondary amine. The proportions of (i), (ii) and (iii) are such that the weight percentage of nitrogen in component (iii) relative to the total weight of components (i), (ii) and (iii) is in the range of 0.05% to 1.5%, and the weight ratio of monohydric phenols: methylene-bridged polyphenols in the composition is in the range of 15:1 to 1:2.

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