RO114539B1 - Fungicidal composition - Google Patents

Abstract

The invention relates to o a fungicidal composition comprised of 10 ... 40 2-octyl-4-isothiazolin-3-one or 4,5-dichloro-2-n-octyl- 0.01 ... 45 parts propylene glycol, 0.01 ... 70 parts of hydrocarbons aromatic with 7 ... 10 decarbon and 10 ... 50 parts of nonylphenolpolyethoxy monomer with 4 to 12 ethoxy groups, the parts being expressed in weight.

Description

The present invention relates to a fungicidal action composition used to combat biodeterioration by mold and rot of wood and other materials, for example, paper, cardboard, wallpaper, textiles, coatings (primers, paints, varnishes, pastes), in forestry, in the wood industry, construction materials, paper industry, textile industry.

The protection of wood and other materials against the destructive action of fungi is particularly important, contributing to the reduction of material losses and to increase the life of the products.

Fungicidal compounds are known, such as pentachlorophenol, sodium pentachlorphenolate, creoside, arsenic salts, the use of which has been banned due to their toxic or carcinogenic nature. Sodium o-phenyl phenolate, quaternary ammonium salts or dithiocarbamates are used instead. Isothiazolone derivatives, such as 2-n-octyl-4-isothiazolin-3-one or 4,5-dichloro-2-noctil-4-isothiazolin-3-one, are known to be extremely active fungicides at low doses ( US 5160527; RO 73948). The mentioned isothiazolonic derivatives have the disadvantage that they are insoluble in water, which makes their application for the protection of wood and other materials difficult. Their solutions in organic solvents have a limited field of use in the wood industry, requiring special conditions of application and labor protection. To ensure the retention in the wood of fungicides dissolved in organic solvents, the vacuum-pressure impregnation procedure is used, a complicated and expensive method and applicable only to wood for special uses (mine, railways).

The technical problem of the invention is to find compositions of 2-octyl-4-isothiazolin-3-one or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one with emulsifiers to ensure their dispersion in water. in the form of stable emulsions, easy to apply and which increase the retention of fungicidal active substance in wood and with a wide field of application to wood and wood-based products.

The fungicidal composition according to the invention removes the disadvantages mentioned above, in that it consists of: 10 ... 40 parts 2-n-octyl-4-isothiazolin-3-one or 4,5-dichloro-2-n-octyl -4-isothiazolin-3-one, 0.01 ... 45 parts propylene glycol, 0.01 ... 70 parts aromatic hydrocarbons, with 7 to 10 carbon atoms, and 10 ... 50 parts nonylphenolpolyethoxy mono-maleate with 4 to 12 ethoxy groups, the parts being expressed by weight.

The present invention has the following advantages:

- easy preparation method, from available raw materials;

- high efficacy against fungi that produce mold, blue and rot of wood and other natural or synthetic cellulose materials, at low treatment rates;

- it is easily dispersed in water, and the emulsions obtained are stable for a long time;

- can be applied by simple procedures, such as immersion, spray and brush application;

- does not change the natural color of the wood;

- have a low toxicity at the concentrations of use.

The following are two examples of embodiments of the invention.

Example 1. In a mixing vessel with enamelled glass or stainless steel glass, 50 kg of non-phenyl-polyethoxy monomaleate with 8 ... 10 ethoxy groups is added and 50 kg of solution is added gradually with stirring. 45% w / o 2-octyl-4-isothiazolin-3one in propylene glycol. The mixture is stirred at 2O ... 4O ° C for 2 hours to homogenize the components. A viscous product is obtained, containing 22.5% gr 2- n-octyl-isothiazolin-3-one.

RO 114539 Bl

Example 2. In a mixing vessel fitted with glass 50 enamelled steel or stainless steel, 50 kg non-phenyl-polyethoxy monomaleate with 8 ... 10 ethoxy groups is added and 50 kg solution is gradually added with stirring. % gr. 4,5-dichloro-2-noctil-4-isothiazolin-3-one in aromatic hydrocarbons with 7-10 carbon atoms. The mixture is stirred at 2O ... 4O ° C for 2 hours to homogenize the components.

A viscous product is obtained, containing 12.5% wt 4,5-dichloro-2 - / 7-octyl-4-usothiazolin-3- 55-one.

Test A. Testing the fungicidal efficacy of the composition according to examples 1 and 2, for surface treatments against mold and wood blue. The wooden specimens were treated by immersion in the composition according to the invention. The results are presented in table 1. 60

Table 1

Fungicidal effectiveness against mold and blue

Product Treatment solution % Absorption solution g / m ² Product / s withheld g / m ² Mycelium coverage Effectiveness fungicidal Example 1 0.4 385 1.542 / 0.346 2 average 0.5 780 3.9 / 0.877 1 - 2 good average 1.0 937 9.37 / 2108 1 Hi Example 2 0.4 312 1.25 / 0.153 3 weak 0.64 328 2.1 / 0.257 2 average 1.0 874 8.75 / 1.074 1 -0 very good Hi

The composition according to Examples 1 and 2 adheres and penetrates easily into the wood, as compared to the isothiazolinone derivatives, as shown by the data in table 2. 70

Table 2

Absorption of the wood treatment solution

Product The treatment solution % Absorption solution g / m ² Product / s Retained, g / m ² 2-n-octyl-4-isothiazolin-3-one (45 wt% propylene glycol) 0.4 300 1.2 / 0.54 Example 1 0.4 385 1.5 / 0.35 4,5-dichloro-2-n-octyl-4-uzotiazolin-3- one (25% gr. In chileans) 0.4 298 0.8 / 0.2 Example 2 0.4 312 1.25 / 0.153

Test B. Testing the resistance of wood to rot. The results are presented 85 in table 3.

RO 114539 Bl

Table 3

Effectiveness of rot protection against fungus Merulius lacrymans

Product Treatment solution % Absorption solution, kg / m ³ Product / s withheld, kg / m ³ Mass loss to witness index microbiological Example 1 0.64 1.0 581.3 to 611.8 572,2-661,0,5 3.74 to 3.9 / from 0.84 to 0.87 5.72 to 6.61 / 1.28-1.48 1.7 to 2.11 1.4 to 1.29 92.12 to 91.56 93.51 to 93.79 Example 2 1.0 449.2 to 631.0 4.41 to 6.31 / 0.55 to 0.77 1.6 to 1.11 92.58 to 95.56 1.6 460.0 to 652.4 7.32 to 10.42 / 0.89 to 1.27 1.05 to 0.88 95.13 to 96.48

Claim

Claims (1)

95 Claim Fungicidal composition, characterized in that it consists of 10 ... 40 parts 2-n-octyl-4-isothiazolin-3-one or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, 0.01 ... 45 parts propylene glycol, 0.01 ... 70 parts aromatic hydrocarbons with 7 to 10 atoms of 100 carbon and 10 ... 50 nonylphenyl-polyethoxy monomaleate parts with 4 to 12 ethoxy groups, the parts being expressed by weight.