Patent GB-719421-A (GB)
Title: Organo tin compounds and compositions containing same
IPC: C07F7/22
Filed: 1952-06-18
Abstract: A resinous composition comprises a chlorine-containing vinyl resin and an organo-tin compound of the general formula RnSn (SR1)4-n wherein R represents an alkyl or aryl radical, R1 is an alkyl, aryl, aralkyl or alkaryl radical any of which may contain an amino substituent, or a heterocyclic radical, and n is 1, 2 or 3.  Suitable chlorine-containing vinyl resins are polymers of vinyl chloride, copolymers of vinyl chloride and vinylidene chloride, and copolymers of vinyl chloride and vinyl esters, particularly vinyl acetate. Suitable organotin compounds are of the above general formula wherein the R radical represents the methyl, n-butyl, n-amyl, lauryl and phenyl radical, and the radical SR1 is derived from ethyl, n-, iso-and sec.-butyl, n-amyl, n-and tert.-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-tetradecyl, n-and tert.-hexadecyl, benzyl, phenyl, p-tolyl, o-aminophenyl, and 2-benzothiazolyl mercaptan, and "lauryl" mercaptan comprising a mixture of normal C10, C12, C14 and C18 mercaptans which approximates to the formula C13 H27SH.ALSO:The invention comprises organo-tin compounds of the general formula RnSn(SR1)4-n, wherein R represents an alkyl or aryl radical, R1 represents an alkyl, aryl, aralkyl or alkaryl radical, any of which may contain an amino substituent or a heterocyclic radical, and n is 1, 2 or 3, and the preparation thereof by reacting a compound of the formula R3SnOH, R2SnO or RSnOOH, or a compound of the formula R3SnX, R2SnX2 or RSnX3, with a compound R1SH, where R and R1 have the above significance and X is a halogen.  When an organotin halide is used, the reaction may be carried out in the presence of a hydrogen halide acceptor, e.g. an alkali or alkaline earth metal oxide, hydroxide, bicarbonate or carbonate.  The Specification includes a large number of examples of the preparation of compounds of the above general formula wherein the R radical is a methyl, ethyl, n-butyl, n-amyl, lauryl and phenyl radical, and the radical SR1 is derived from ethyl, n-, iso- and sec.-butyl, n-amyl, n- and tert.-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-tetradecyl, n- and tert.-hexadecyl, benzyl, phenyl, p-tolyl, o-aminophenyl and 2-benzothiazolyl mercaptan, and "lauryl" mercaptan comprising a mixture of normal C10, C12, C14 and C18 mercaptans which approximates to the formula C13H27SH.  Sec.-butyl mercaptan is prepared by refluxing sec.-butyl bromide, thiourea and ethyl alcohol.ALSO:Mineral oil additives comprise organo-tin compounds of the general formula Rn Sn (SR1)4-n wherein R represents an alkyl or aryl radical, R1 represents an alkyl, aryl, aralkyl or alkaryl radical any of which may contain an amino substituent, or a heterocyclic radical, and n is 1, 2 or 3 (see Group IV(b)).ALSO:Rubber accelerators and antioxidants comprise organo-tin compounds of the general formula RnSn(SR1)4n, wherein R represents an alkyl or aryl radical, R1 represents an alkyl, aryl, alkaryl or aralkyl radical any of which may contain an amino substituent, or a heterocyclic radical, and n is 1, 2 or 3 (see Group IV (b)).  A typical organo-tin compound which may be used is di-n-butyl-tin di-(ethylmercaptide).