Tetra:hydro-anilino-ethyl-methyl-quinoline use in rubber - as stabiliser, esp. against thermal ageing

摘要

The use of 1,2,3,4-tetrahydro-4-anilino-3-ethyl-2- methylquinoline (I) as rubber additive is claimed. In an example a blend of 100 pts. smoked sheets, 40 pts. C black, 3 pts. aromatic plasticiser, 0.75 pt. paraffin, 1.5 pts. stearic acid, 5 pts. ZnO, 2.5 pts. S and 1 pt. benzothiazyl-2 -cyclohexylsulphenamide was treated with no antioxidant or with 3 pts. phenyl-beta-naphthylamine, 2,2'-methylene-bis (4-methyl-6-tert.-butylphenol) (II), 2,2,4-trimethyl-1,2- dihydroquinoline or (I). (I) was generally about as effective as (II) and more effective in the Mooney scorch test. (I) is an excellent stabiliser, esp. against thermal ageing, and is readily available.