PL187979B1 - Mould-killing agent - Google Patents

Abstract

A mildewcidal agent containing, in addition to the biologically active substance, known auxiliary ingredients such as dispersing, wetting, emulsifying, thickening, binding agents and carriers, characterized in that it contains as the biologically active substance a mixture of copper bis(8-quinolinolate) in an amount of 5 to 80% by weight in a mixture with a bis-thiocarbamyl polysulfide derivative of the formula shown in the drawing, wherein R1, R2, R3 and R4 are identical and represent a methyl or ethyl group and n represents an integer 1 or 2, and especially tetramethylthiuram disulfide in an amount of 20 to 95% by weight in the mixture.

Description

The subject of the invention is a moldicide for removing fungi in walls, used for finishing materials in construction, in particular as an additive to paints.

Many compounds from various chemical groups are used to clean the walls. The most common are organic mercury and arsenic compounds and mixtures of components based on fluorosilicate derivatives. Organic mercury compounds are excellent fungicides acting in very low doses simultaneously on numerous species of fungi. They prevent the occurrence of toxic molds such as Chaetomium globsum, Aspergillus niger and Pencillium funiculosum in construction.

Moldicides containing organic mercury compounds or fluorosilicate salts are, however, dangerous to humans and the environment, and therefore despite such advantages as high efficiency and simultaneous action on many species of fungi, moldicides containing organic mercury are systematically replaced by multi-component moldicides that would fulfill the role of previously used massively organic compounds.

There are many paints containing a mixture of moldicides used to prevent the occurrence of mold in construction, for example from US Pat. Am. North No. 3 817 761 is a paint for painting containing 2-benzimidazolcarbamic acid, zinc oxide, dithiocarbamic acid, methyl ester and phenylmercuric acetate, phenylmercuric succinate or phenylmercuric oleate; from U.S. Patent Am. Pin. No. 3 817 762 paint for painting, containing, among others 2- (4-thiazo) -benzimidazole. dimethyl-dithiocarbamic acid, zinc salts, 3, 4, 5-tribromosalicylanilide, 2-mercaptopyridine oxide. Also known from the Polish patent specification No. 121461 is a fungicide, also used as an additive for paints, containing a mixture of tetramethylthiuram disulfide (thiuram) and a copper (II) complex with 8-hydroxyquinoline and salicylic acid (copper salicylate oxin).

The mixture of thiuram and copper salicylpermis oxin is an excellent fungicide acting in very low doses simultaneously on numerous species of parasitic fungi attacking the plant as well as preventing the occurrence of toxin-forming molds in construction, such as Chaetomium globosum, Aspergillus niger and Pencillium funiculosum, but it is chemically unstable in time.

In the course of research on the search for a chemically stable moldicide mixture, it was surprisingly found that a moldicide containing as a biologically active substance a mixture of copper bis (8-quinolinole) (cupric oxine) and a bis-thiocarbamyl polysulfide derivative of the formula shown in the figure in which Ri R _2, R 3 and R are identical and represent methyl or ethyl, and n is an integer of 1 or 2, especially thiram, is an excellent pleśniobójczym, stable in operating at very low doses at the same time to numerous species of fungi preventing construction occurrence toxic mold.

187 979

The compositions according to the invention also contain known and used mineral or organic carriers, solvents or diluents, surfactants and known substances in bird repellent or insect control, as well as growth substances and other fungicides.

The agent according to the invention, in addition to its high moldicidal effectiveness, is a stable product, the active substance does not decompose over time, which allows for longer storage of the agent without changing its color.

Example I

The sodium chloride according to the invention is obtained by adding 33 parts by weight of thiuram, 33 parts by weight of cupric oxine, 5 parts by weight of sodium lignin sulphonate, 1 part by weight of a moisturizer and 28 parts by weight of silica. A composition is obtained with a proportion of the components in the biologically active mixture of 50: 50% by weight.

Example II

The agent obtained according to example 1 was added to the water-based paint mixed with water in the proportion 4: 1 in such an amount that the content of biologically active substance in% by weight was 1.2.

The laboratory investigates the efficacy of the agent according to Example 2 on the following bioindicators: Chaetomium globosum, Aspergillus niger and Pencillium funiculosum. The percentage of linear growth inhibition of mycelium relative to the control (without agent) characterizes the fungicidal activity of the agent when used in conjunction with the finishing material. The results are presented in the table.

The method of keeping Petri dishes with potato-agar medium and test samples with inoculated mold spores under optimal conditions for their development was used for the research. The aim was to determine the fungicidal properties of the test agent by measuring the linear growth of mycelium on the test medium.

Table

L.p. Center Content s.b.cz. in wt.% Inhibition of mycelium growth compared to the control (%) Chaetomium globosum Aspergillus niger Penicillium funiculosum 1 Oxine copper + Tiuram (unknown) 1.2 100 100 100 2. Oxine copper (known) 1.5 96.9 81.1 88.9 about J). Tiuram (known) 1.5 39.9 82.2 93.1

The test results presented in the table show the high bioprotective properties of the agent according to the invention against "mold fungi". At the same time, the agent has an almost neutral effect on the environment, due to the fact that the ingredients of the agent do not pose a threat as oral poisons to warm-blooded organisms. A particularly advantageous property of an agent according to the invention is the reduced content of biologically active substances with respect to the individual components used as comparators.

The test results prove that the mixture of the agent has a synergistic bioprotective action of the ingredients of the agent. It is a stimulating effect and very beneficial.

187 979

Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (1)

Patent claim A moldicide containing, in addition to the biologically active substance, known excipients such as dispersing, wetting, emulsifying, thickening, binding agents and carriers, characterized in that the biologically active substance is a mixture of bis (8-quinolinole) copper in an amount of 5 to 80% by weight in mieszninie with a derivative of bis-thiocarbamyl polysulfide having the formula shown in the drawing, in which R, R _2, R 3 and R 4 are identical and represent methyl or ethyl, and n is an integer of 1 or 2, especially disulfide tetrametylotiuramowy. in an amount of 20 to 95% by weight in the mixture.