Ozonschutzmittel

摘要

1,210,303. Cyclohexenylidene-methyl ethers and thioethers. FARBENFABRIKEN BAYER A.G. 9 July, 1968 [27 July, 1967; 5 Feb., 1968; 9 May, 1968], No. 32746/68. Heading C2C. [Also in Divisions C3P and C3Q] The invention comprises compounds of the formula wherein R 1 represents a hydrocarbon radical which may optionally contain oxygen or sulphur atoms, X represents an oxygen or sulphur atom, R 2 and R 3 each represent a hydrogen atom or a methyl group and m represents 0 or 1, are prepared by reacting the corresponding alcohol R 1 OH or mercaptan R 1 SH with the corresponding cyclohexene-aldehyde in the presence of an acid as catalyst e.g. p-toluene sulphonic acid. The following compounds are specified: X = oxygen, m = 0, R 2 , R 3 = hydrogen R 1 = n-butyl, n-hexyl, i-octyl, inonyl, n-dodecyl, benzyl, cyclohexyl, n-butyldiethylene glycol ether, phenyl ethylene glycol ether, ethyl ethylene glycol ether, n-butyl ethylene glycol ether, 2-phenyl-thio ethyl, 2- methylthioethyl; X = oxygen, m = 0, R 2 = H, R 3 = CH 3 or R 2 = CH 3 , R 3 = H, R 1 = nhexyl, i- and n-octyl, benzyl, n-butyl; X = oxygen, m = 1, R 2 , R3 = H, R 1 = n-hexyl, i-octyl, n-dodecyl, benzyl, and also [3- (or 4-) methylcyclohexen - (3) - ylidene - methyl]4 - tbutylphenyl (or n-dodecyl) thioether and [2,5- endomethylene - cyclohexen - (3) - ylidenemethyl]-n-dodecyl thioether. The novel compounds act as anti-ozonants.