Verfahren zur Herstellung von zinnhaltigen Polymeren

The invention comprises organotin salts of p-vinyl benzoic acid of formula: wherein R, which may be substituted, is a C1-C18 alkyl or alkenyl group or a monocarboxylic aryl group and n is 1, 2 or 3. When n is 2 or 3, the R groups may be the same or different e.g. as in phenyl dibutylin-p-vinyl benzoates. The substituents may include polyoxyethylene groups. The compounds of the invention may be prepared by reacting an organotin oxide of formula (R3Sn)2O or R2SnO with p-vinyl benzoic acid, or an organotin halide of formula RnSnX4-n wherein X is a halogen atom, with a metal or ammonium salt of p-vinyl benzoic acid. An inert solvent such as benzene, toluene, xylene or heptane may be used: the reaction may be carried out at a temperature up to 135 DEG C. The isolated product may be used to form polymers or as a cross linking agent (see Division C3).ALSO:Organotin-p-vinyl benzoates may be polymerised by direct polymerisation techniques or by graft polymerisation, the unit of the polymer being of formula: where R, which may be substituted, is a C1-C18 alkyl or alkenyl group and n is 1, 2 or 3. Compounds in which n is 2 are useful as cross linking agents. The organotin salts may also be copolymerised with other ethylenic monomers e.g. vinyl alcohol, vinyl chloride, vinyl acetate, styrene, methyl vinyl ketone, vinylidene chloride, acrylic, chloracrylic and methacrylic esters, acrylonitrile, butadiene, isoprene and chloroprene. Polymerization may be initiated by peroxy catalysts (benzoyl peroxide, lauroyl peroxide tertiary alkyl peroxides and di-tertiary alkyl peroxides), alkali metal persulphates such as potassium persulphates, azo-bis-(isobutyronitrile) and free radical catalysts. The following are prepared in the examples: (13) poly-tributyltin -p-vinylbenzoate; (14) emulsion polymerization of tributyltin -p-vinyl benzoate; (15) copolymer of tributyltin-p-vinyl benzoate and -pchlorostyrene; (16) copolymer of dibutyltin bis (p-vinyl benzoate) and styrene; and copolymers of methylmethacrylate with (17) tributyltin p-vinyl benzoate and (18) dibutyltin bis (p-vinyl benzoate).ALSO:Fungicidal and bactericidal compositions contain as active ingredient a triorganotin-p-vinyl benzoate of formula R3SnOOC.C6H4.CH = CH2 where R, which may be substituted, is a C1-C18 alkyl or alkenyl group or a monocarbocyclic aryl group, or a polymer thereof.