GB969962A - Fungicidal compositions - Google Patents

Abstract

A fungicidal composition comprises a mixture of a major proportion of zinc ethylenebisdithiocarbamate and a minor proportion, preferably from 0.5 to 10% based on the weight of the zinc compound and in particular from 1-5%, of a cationic, water-dispersible polymer containing a multiplicity of nitrogenous groups and having a molecular weight between about 500 and about 100,000 and preferably not exceeding about 10,000. The polymers may be:- (a) Polyalkylenepolyamines, NH2(CnH2nNH)xH, where n has a value of 2 to 3 and x is an integer over about 12 and may be at least as large as 40; (b) Ureidopolyalkylenepolyamines, <FORM:0969962/A5-A6/1> where x1 and y are integers, the sum of which is at least about 12 (usually 12 to 40), and n has a value of 2 to 3; (c) Methylol derivatives of the above compounds; (d) Polyhydroxypolyalkylenepolyamines <FORM:0969962/A5-A6/2> where x and y are integers yielding a molecular weight of at least 500, usually 500 to 10,000, and n has a value of 2 to 3; (e) Ureidopolyhydroxypolyalkylenepolyamines <FORM:0969962/A5-A6/3> where M represents hydrogen or the -CONH2 group and x, y and z are integers, the sum of which is at least about 12 and may be as high as 40 or more, and n has a value of 2 to 3; (f) Methylol derivatives of the above compounds (d) and (e); (g) Polymers from aminoalkylacrylamides, R1R2NCnH2nNHCOC(R0)=CH2 where R1 and R2 are members of the class consisting of hydrogen and lower alkyl groups, n is an integer from 1 to 3, and R0 is a member of the class consisting of hydrogen and the methyl group. Specified polymers of this type are N - (2 - dimethylaminoethyl)acrylamide, N - (dimethylaminoethylamino - ethyl)acrylamide, N - (3 - dimethylaminopropyl)acrylamide, N - (2 - (3 - dimethylaminopropyl) aminoethyl) acrylamide, or N-3-diethylamino-propyl)acrylamide, N - (2 - dimethylaminoethyl) - methacrylamide, N - tert. - butylaminoethylacrylamide, and N - tert. - butylaminoethoxyethylacrylamide. Similar members of this class include polyaminoalkyl-substituted poly(methyl acrylate), formed by reacting poly(methyl acrylate) or poly(methyl methacrylate) with an alkylenepolyamine in excess, such as the ethylenediamine, diethylenetriamine, aminopropylaminoethylamine, aminoethylamino - propylaminoethylamine, <FORM:0969962/A5-A6/4> triethylenetetramine, tetraethylenepentamine. (h) Polymers from polyaminoalkylacrylamides, <FORM:0969962/A5-A6/5> where x is an integer from 1 to 4, n is an integer from 2 to 3, and R1, R2 and R0 are as above; (i) Polymers of aminoalkyl acrylic esters, R1R2NAOOCC(R0)=CH2 where R1 is a member of the class consisting of hydrogen and lower alkyl groups and R2 is a lower alkyl group, A is an alkylene group of 2 to 3 carbon atoms, and R0 is a member of the class consisting of hydrogen and the methyl group; specified polymers of this type are dimethylaminoethyl, dimethylaminopropyl, diethylaminoethyl, or diethylaminopropyl acrylates or methacrylates; (j) Polyvinyl amino resins, <FORM:0969962/A5-A6/6> where m is an integer of at least about 12, R1 and R2 are hydrogen or lower alkyl groups or equivalent groups in which R1 and R2 form a heterocycle as in morpholine or piperidine. Tertiary amine groups may be quaternized. (k) Polyvinyl amino resins, in which the vinyl polymer chain is joined to the amino group through a benzene nucleus or a methylene group (here represented by A), <FORM:0969962/A5-A6/7> (l) Polymers of aminoalkyl vinyl ethers, R1R2NAOCH=CH2 where R1 and R2 are members of the class consisting of hydrogen and lower alkyl groups and A is an alkylene group of 2 to 3 carbon atoms. Specified polymers of this type are poly(dimethylaminoethyl vinyl ether) or poly(N-methylaminoethyl vinyl ether), poly(aminoethyl vinyl ether), or poly(aminopropyl vinyl ether), and the corresponding thioethers. (m) Polyethylene-imine; (n) Ureides from polyethyleneimine; and (o) Methylol derivatives of (m) and (n); (p) Aminolyzed styrene polymers, e.g. by replacing chlorine in chloromethylated polystyrene with polyamine groups as from an alkylenepolyamine. Any of these may also be used in quaternary ammonium salt from or in the form of a slat formed with an acid. Other co-monomers may be used in conjunction with any of the above nitrogenous monomers, which polymerize by addition to form copolymers, the proportion of such other co-monomer or comonomers being adjusted to retain dispersibility in water. Thus, minor proportions of alkyl acrylates or methacrylates, vinyl esters, alkyl fumarates, or alkyl itaconates may be copolymerized. Likewise, copolymers may be formed with two or more nitrogen-containing monomers which polymerize by addition; (q) or a salt of any of the above compounds (a) to (o) may also be used, e.g. hydrochloride, sulphate, acetate or phosphate; (r) or polymers of compounds (g)-(i) may have quaternary ammonium groups in place of some or all of the -NR1R2 groups for example the quaternary salt formed by reacting benzyl chloride with poly - N - (3 - dimethylaminopropyl)acrylamide. U.S.A. Specifications 2,626,874, 2,643,958, 2,742,453, 2,845,408 and German Specification 1,055,810 are referred to.