Antiseptic for the protection of cellulose-containing materials

 

(57) Abstract:

The invention relates to antiseptic compositions for biochemical protection of cellulose-containing materials from blue stain fungi and mold, in particular of wood, and can be used in sawmills and woodworking industry. As an antiseptic proposed a combined composition comprising inorganic components in the form of sodium carbonate and trinary phosphate and organic component in the form of acetic acid alkylamine, the components are taken in the following ratio, wt.%: sodium carbonate 73-77; trisodium phosphate 11-15 and the acetic acid alkylamine 8-14.

The invention relates to antiseptic preparations for the protection of cellulose-containing materials, in particular wood, from blue stain fungi and mold during its atmospheric drying and transportation humidity above transport and can be used in sawmills and woodworking industries.

A well-known antiseptic composition for protecting wood, containing, by weight. pentachlorophenolate sodium 36,5; transformer or spun butter 2; ethylmercuric 0,48; caustic sodium 0.5 and soda salt the rest. /see Plomin E. E. and others At the t property quickly to stop the growth of microorganisms. Active basis it is pentachlorophenolate sodium, which penetrates poorly into the wood and thereby reduces the effectiveness of the drug to protect it from rotting. Antiseptic acts selectively on fungal flora, thereby complicates and limits the technology of its application. Antiseptic is unpleasant and irritating odor and requires mandatory protection when working with him.

Known antiseptic composition for protecting wood and lumber from rotting containing the following components, wt. pentachlorophenolate sodium 38,0-42,0; thiourea 10,0-12,0; mineral oil 2.0 to 2.5; triphenyl of 1.5-2.0 and sodium carbonate 41,5-48,5 /see ed. St. USSR N 489638, CL 4 B 27 K 3/52 from 3.12.73,/.

The disadvantage of this antiseptic is that its activity is manifested only at high concentrations in aqueous solutions. This drug belongs to the 1st class of hazard. It is toxic to the environment; in contact with the drug solution possible eczema on my hands and inflammation of the mucous membrane of the upper respiratory tract. In the process of applying it, be sure to use personal protective equipment.

Also a disadvantage of this antiseptic of assetswith wood deteriorates and the subsequent processing is complicated.

The closest in composition and accepted by the applicant as a prototype is a known antiseptic composition for protecting wood against blue stain fungi and mold, which are described in the Technical specifications /TU OP 13-0273675-29-90/ developed by the NGOs Southaustralia" in 1990, This antiseptic is produced under the name of "CATAN".

Specified antiseptic multicomponent and includes inorganic part consisting of soda ash, trisodium phosphate and boric acid, and organic part consisting of alkyldimethylbenzylammonium chloride, when all components are taken in the following ratio, wt. soda ash 56,5 58,5; trisodium phosphate 12,0 14,0; boric acid 5,0 6,0; alkyldimethylbenzylammonium 23 25.

As an active Foundation this drug is used alkyldimethylbenzylammonium chloride.

One of the drawbacks of the prototype is its high toxicity.

This is due to the fact that as an organic part contains antiseptic alkyldimethylbenzylammonium chloride. The specified connection is assigned to the 2nd class of hazard. It is harmful to the environment; has skin irritation and severe skin-resorptive action is oany control over the concentration of antiseptic in aqueous solution. Safe level of exposure to the compound is 0.07 mg/m3and MPC in water reservoirs 0.1 mg/l

In addition, the disadvantage of the prototype is that the antiseptic action it takes only 5 to 8% of the energy business solutions, and for spruce wood concentration is 5 to 7% for pine 6 8% i.e., depending on wood species require different working solutions of antiseptics, which complicates the technology of its use. Working solutions have a pH of 8.8 to 9.5. Average consumption antiseptic equal to 1.75 kg/m3. The rate of preservation of the surface samples of softwood and hardwood sapwood pieces of wood at 5% concentration solution after 30 days of exposure is 88% after 50 days 73% and 6 8% concentration index is equal to 94% at 30 days of exposure of samples and 90 to 91% after 50 days.

Thus, came the task of developing an antiseptic composition that would be well dissolved in the water would be safe for the environment, non-toxic, cheap, environmentally friendly, showed least activity at low concentrations in the working solution, would biosecurity any wood and would be cheap and available production technology.

Casarona sodium 73 77; trisodium phosphate 11 15 and the acetic acid alkylamine 8-14.

Thus, the proposed composition of the antiseptic differs from the prototype of the fact that it contains only two inorganic component and that as organic parts use the acetic acid alkylamine / industry this connection is called "SCIENCE"/, having the structural formula:

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Sodium carbonate /sodium carbonate or soda ash is a white powder, which is well /with increasing temperature environment/ soluble in water and insoluble in most organic solvents. It is used in pharmaceutical, leather, rubber and food industries, as well as for the manufacture of glass, aluminum, detergent, oil treatment, cleaning and washing clothes. In the proposed composition of antiseptic sodium carbonate accelerates the migration of the active part of the mixture, which is INDICATED by education him moving unstable systems.

Trisodium phosphate is a sodium salt of phosphoric acid, soluble in water and is used in industry as a cleaning vodovmeschayuschih funds, as well as in the food industry in the production of RH fungal flora wood, lowering its resistance against fungicides.

The UNIVERSITY belongs to the class of primary amines. Currently, the production of this connection technology, which is relatively inexpensive, waste-free and environmentally friendly.

The degree of impact on living organisms INDICATED refers to moderate chemicals / 3-hazard class/ identified its bactericidal and bacteriostatic properties with respect to cellulose-containing materials. The rate of preservation of wood impregnated with a solution of this compound is relatively high, but considering that one of the significant indicators of the use of antiseptics is its economic performance, apply it yourself for the timber industry unprofitable.

In the proposed composition of the Ukrainian Catholic UNIVERSITY is an active part of the blend, i.e., it destroys the fungal flora in the wood. Thus, each of the three ingredients of the composition of the antiseptic performs its function, thus increasing the effect of each other. As a result of impact that the antiseptic activity of the proposed structure is slightly higher than the protecting properties directly INDICATED.

Industry proposed ant is NITEL with stirrer impose soda soda and trisodium phosphate based (wt.) specified in the claims. The mixture was thoroughly stirred and under pressure of 0.07 MPa /0.7 kgf/cm2/ mixer inject the acetic acid alkylamine. The device of the mixer and the mixer is such that after 50 to 60 minutes, there is complete mixing and homogenization of the mixture.

The finished product is a homogeneous powdery mass of white, almost odorless, with the content of the mass fraction of carbonate in terms of CO-3223 24% LD500,43 g / kg Antiseptic belongs to the 3rd class of hazard. MPC in water reservoirs is 2 mg/m3/in the prototype 0.1 mg/l/, the security level in the air is 0.04 mg/m3/in the prototype 0.07 mg/m3/.

Antiseptic stariway 20 kg bags and send to realization. Working solutions of it are produced in the form of 5 to 7% concentration. When above and below these limits effect concentrations do not reach, because at lower values antiseptic activity is small, and when the top is economically inexpedient.

About the quality of the received antiseptic judged in terms of preservation of the surface of wood samples, previously infected suspensions supports and dried to their original moisture content. "Acetas-1 was tested against the phiosomapini, O. pilifera, and mold Aspergillus niqer, Verticillium Penicillium glaucum meleagrinum, Trichoderma harzianum.

Average consumption "ACETAS-1" is 700 g/m3and while the prototype of 1.75 kg/m3that is an additional advantage of the proposed composition of the antiseptic before prototype.

The greatest effect of preservation of wood samples was observed after 30 days of exposure of samples. When processing samples 5% concentration of the working solution after 30 days of exposure preserving them was 96% and under the same conditions on the prototype 88% Technical effect is significantly increased due to the fact that the proposed antiseptic less dangerous to humans and the environment and the consumption of significantly less than the composition of the prototype.

Examples of specific performance.

Example 1. In a special mixer with stirrer enter the components sodium carbonate and trisodium phosphate in the amount of 75 and 13 wt. respectively. The mixture was thoroughly stirred /heat, i.e., the mixture is heated to 50oC/. Then through the nozzles enter the acetic acid alkylamine /under pressure of 0.7 kgf/cm2/ in the amount of 12 wt. and continue stirring the mixture for 50 to 60 minutes. After this vremeni 23 of 24% and a pH of 8.8 to 9.5. Ready antiseptic stariway and send to realization.

The preservation of the surface of the samples after 30 days at 5% concentration solution was 96% and at 7% and 99% after 50 days 94% and 97%, respectively. The antiseptic effect is observed at these concentrations the solutions and after 10, 20 and 40 days of exposure and was 99% 96% and 94% at 5% concentration and 100%, 99% and 98%, respectively, at 7% concentration solution.

Example 2. In the mixer is administered in the same order and under the same conditions as in example 1 with the only difference that the number of input components is 73, 15 and 12 wt. respectively.

Antiseptic tested similarly as in example 1, samples of wood, pre-soaked and dried to their original moisture content. Preservation of samples over 30 days at 5-Noy concentrations were 96.7% and 7% to 98.5% after 50 days 93,6% and 96.7%, respectively.

Example 3. Analogously to example 1, with the only difference that is taken in the amount of 77, 15 and 8 wt. Preservation of samples after 30 days of exposure at 5% concentration of the working solution was 95% and at 7% 98% after 50 days -93% and 94%, respectively.

Revealed that p is camping in the quantitative content /wt./ components specified in the claims. At values above and below these limits, the effect is reduced: at set intervals, quantities of each component antiseptics are necessary and sufficient to obtain the greatest effect biosecurity of wood against blue stain fungi and mold during its atmospheric drying or transportation with humidity above the transport.

Proposed antiseptic "ACETAS-1" extends the range of known combination of antiseptics and is in its properties promising drugs for biosecurity of wood against blue stain and mould.

Antiseptic for the protection of cellulose-containing materials containing sodium carbonate, trisodium phosphate and organic nitrogen-containing component, characterized in that as the nitrogen-containing organic component it contains acetic acid, alkylamine in the following ratio, wt.

Sodium carbonate 73 77

Trisodium phosphate 11 15

Acetic acid alkylamine 8 14

 

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