Patent GB-737392-A (GB)
Title: Improvements in or relating to organic tin-containing compounds and compositions containing the same
IPC: C07F9/02
Filed: 1952-09-19
Abstract: The invention comprises organo-tin compounds of the general formula RwSnGy wherein G represents any of the radicals <FORM:0737392/IV (b)/1> w being 2 or 3, y being 1 or 2 so that w + y is 4, Z represents oxygen or sulphur and R, R1 and R11 represent hydrocarbon radicals, and a process for the preparation thereof by reacting an organo-tin halide of the general formula RwSnXy, wherein R, w and y have the significance indicated above and X is a reactive halogen, with at least one salt of a sulphur containing compound of the general formula GY wherein Y represents a cation and G has the significance indicated above.  The R, R1 and R11 radicals preferably have 1 to 20 carbon atoms and may be alkyl, alkenyl, cycloalkyl, aryl, aralkyl and alkaryl radicals.  Alkyl radicals referred to are the methyl, isopropyl, octyl, dodecyl and octadecyl radicals.  Other radicals referred to are the phenyl, naphthyl, benzyl, octaphenyl and ethylcyclohexyl radicals.  The process may be carried out in a substantially inert solvent.  The preferred reaction temperature is in the range of 10 DEG  to 100 DEG  C. The cation Y may be an alkali or alkaline earth metal such as sodium, potassium or calcium, or ammonium or amine salts of the sulphur containing acid may be used. The following sulphur-containing compounds are referred to: n-butyl, isopropyl, hexadecyl and ethylcyclohexyl, xanthic acids, n-nonyl, lauryl and benzyl thioxanthic acids, dibutyl isopropyl ethyl, diamyl, didodecyl, diethyl and diphenyl ethyl dithiocarbamic acids, di-(methylcyclohexyl), di-(octylphenyl), di-(2-ethylhexyl), dilauryl, dicetyl and di(butylmercapto)dithiophosphoric acids, and dialkyl dithiophosphoric acid where the alkyl groups are derived from a mixture of alcohols obtained from coconut oil and having from 8 to 18 carbon atoms.  The cation Y may be an alkali or alkaline earth metal such as sodium, potassium, lithium or barium, or ammonium or amine salts may be used.  Organotin halides referred to are dibutyl- and dilauryltin dichloride, di-n-hexyl-tin dibromide, triphenyl- and tri-tert.-octyl-tin iodide and tricyclohexyltin chloride.  A number of detailed examples are given.ALSO:Mineral oil fractions and polyether and polyester lubricants contain as a stabilizer an organo-tin compound of the general formula RwSnGy where G represents one of the groups <FORM:0737392/III/1> w is 2 or 3, y is 1 or 2, w plus y is 4, Z is oxygen or sulphur and R, R1 and R11 represent hydrocarbon radicals. The stabilizer may be present in a minor proportion by weight, e.g. in an amount up to 20 per cent of the whole composition such as in an amount from 0.01 to 5 per cent preferably 0.1 to 2.0 per cent by weight based on the total composition.  The stabilizer may be present in sufficient quantity to form a concentrated composition having from 20 to 75 per cent by weight of stabilizer based on the whole composition.  Mineral oil fractions mentioned are motor and fuel oils, lubricating oils and greases, white mineral oils, hydrogenated mineral oils and heating oils. Organo-tin stabilizers specifically referred to are dilauryltindi-isopropylxanthate, dibutyltindi - n - butylxanthate, triphenyltinlaurylthioxanthate, dilauryltindibutyldithiocarbamate, dibutyltindiamyldithiocarbamate, dilauryltindi-(di-isopropyldithiophosphate), dibutyltindi-[di-(methylcyclohexyl) - dithiophosphate] and dibutyltindi - [di - (octylphenyl) - dithiophosphate.