Onebusaway impregnating composition

 

(57) Abstract:

The invention relates to a composition for protecting wood from deterioration by biological agents and fire-resistant, can be used in the process of manufacturing wood products and preventive treatment of structures made of wood, fabrics, carpets and for preservation of wood. Proposed impregnating composition contains dissolved flame retardants based on ammonium salts, antiseptic - ammonium silicofluoride and surfactant. What's new is that as surfactants entered the sulfonic acid or sulfonate, and the components are taken in the following ratio, wt. %: NPK 20-22, ammonium sulfate 3-5, silicofluoride ammonium 2-3, sulfonic acid/sulfonate 1-2, water - the rest. The technical result - the expansion of technological possibilities of composition by increasing frost resistance, simplification of the process of preparing an impregnating solution of fully compatible components and increasing the functional reliability of the composition.

The invention relates to a composition for protecting wood from deterioration by biological agents and fire-resistant, can be used to process the openings and for preservation of wood.

The prior art also get fire wood in the processing of aqueous solutions ammonizirovanny salts characterizes the invention along.with. N 178087, B 27 K 3/20, 1966, recipe impregnating composition which recommended the following (wt.%):

Finalalert - 23,0

DAP - 8,0

Water - 69,0

Samples of wood impregnated with this solution and dried at 95-100oC for 96 hours, after staying with running water for 30 day keeps the flame-retarding properties.

However, the phenol incompatible with diammonium phosphate due to the reduction in the introduction of the flame retardant solution pH to 5 to 6, further polymerization of the original phenol. The time of survival of the composition depends on the degree of polymerization of the initial phenol and does not exceed 12 hours a Phenol with a lifespan of more than one month cannot be combined with diammonium phosphate, that is, the composition has poor reliability and limited industrial applicability.

Noted shortcomings in the composition described in the invention. C. N 674904, B 27 K 3/15, 1997, which improved fire-retardant properties and the pot life of the composition due to the fact that anciety - 25 - 35

DAP - 9 - 10

The ammonium sulfate - 6 - 7

Urea - 12 - 20

Ammonia - 2,3 - 2,7

Water - the Rest

In this antipyrene comprising phenol, polymerizes in the wood during storage and heating, improve its physical-mechanical properties and reduce Flammability. DAP provides the fire-retardant effect on the wood, and urea and ammonia, increasing the pH of the impregnating solution to 8.0 to 8.5, promote the combination of phenol with diammonium phosphate and an additional flame retardants.

Known composition is of limited use only in industrial enterprises, because the impregnated semi-finished products and wood-based materials is carried out under pressure, followed by curing at four temperature increases with exposure for 9 hours. The result is fire-resistant wood-plastic material from which to produce the products.

In addition, the production of fire-resistant materials classified as dangerous for the health of workers due to the action of phenol on the nervous system of people, causing acute and chronic poisoning when exceeding the maximum allowable concentration. The vapor content of phenol in Vozduh> More mobile and technologically advanced composition for surface treatment of wood products, and carpet in any way (spray, brush, roller, spatula) are aqueous solutions of ammonium salts for preservation of wood preservatives and fire-retardant treatment by flame retardants (see BAS, Chemistry, M., 1998, S. 197), which is described in the inventions and.with. N 279020, 1968, N 810493, 1981, both in class. B 27 K 3/12.

The technical essence and the number of matching characteristics as the closest analogue is selected composition A. with. N 279020 containing antiseptic - ammonium silicofluoride, flame retardant - DAP, adhesive additive, silica-alumina filler, and water.

The disadvantage of the prototype is the technological complexity of the preparations antiseptics, which impose additional pre-cooked in a special process casein glue as adhesive additives. The original product for casein glue is scarce and expensive.

In addition, the finished composition is hygroscopic and in operation has poor adhesion due to the formation on the surface of the protected products bulk layer of salts, i.e. fire protection products that are in condition/P> Task to be solved by the present invention is directed, is to increase the functional reliability and service characteristics of the composition for the protection of products from fires and wood from rotting.

The required technical result is achieved by the fact that in the known ognezashhita impregnating composition containing dissolved flame retardants based on ammonium salts, antiseptic - cranioplasty ammonium and surface-active agent, at the suggestion of the authors, as the latter entered the sulfonic acid or sulfonate, and the components are taken in the following ratio, wt.%

NPK - 20 - 22

The ammonium sulfate - 3 - 5

Silicofluoride ammonium - 2 - 3

The sulfonic acid/sulfonate - 1 - 2

Water - the Rest

The hallmarks of increased functional reliability composition by optimizing its qualitative and quantitative components, which are all soluble in water and compatible with each other.

The solution is characterized by good adhesion, showing active intermolecular interaction at the boundary of contact with the wood workpiece, that is completely wets the surface and absorb what hnologie provides adequate fire-resistant and antiseptic qualities.

The main advantage of the proposed technical solutions were achieving a new unexpected effect in increasing frost resistance, i.e. preserving the technological properties at temperatures of minus 9-12oC, which is unattainable in the operation known analogues. This novelty has allowed to use almost year-round for cyclic processing, in particular, wooden attic floor, keeping them in working condition and protecting it from fire.

Each of the essential features in itself known, but their steady relationship together is necessary and sufficient to achieve the effect of the amount, obvious new technical result, extrinsic characteristics in their disunity.

The proposed solution is not known from available information sources prior art, which is not obvious for specialist fire safety, and can be implemented industrially, and also in small forms, i.e. meets the criteria of patentability.

Below is an example implementation of the invention is only illustrative and do not limit the scope of rights collectively the Yu, used in aqueous solution, which is prepared for the workplace by dissolving sequentially components in water, heated to a temperature of 50-60oC. the working solution is applied on a protected surface by brush or spray to stop soaking or dipping. The processing is repeated at least 2-3 times, with intermediate exposure; possible forced convective drying, depending on material and machining conditions.

Impregnating a solution of 100 kg is prepared in the mixer as follows. In water volume 53 l temperature 50-60oC, equal to 3/4 of the required total amount of water soluble 21 kg of granulated ammonium nitrate, THE 113-03-466-91, prilisaetsa 1.5 kg sulfonic acid, THE 6-01-1001-75 or sulfonate, GOST 15034-69.

NPK (flame retardant) contains not less than 16 wt.% each: nitrogen in the form of compounds NH4Cl, NH4SO3, NH4H2PO4, KNO3, available phosphorus (P2O5) and potassium (K2O), and the sulfonic acid/sulfonate (wetting and emulsifying agent) is a mixture of 85-90 wt.% anionic surfactants (alkylbenzenesulfonates or alkyl sulphonates) with Na2SO4, Na2SO3or with NaCl>2SO4, GOST 9097-A - flame retardant and 2.5 kg of antiseptic - ammonium silicofluoride technical, THE 113-08-582-85 until complete dissolution.

The remaining amount of water is 18 liters poured to the solution to obtain a specific gravity of not less than 1,17 kg/m3at room temperature, 20oC.

Prepared impregnating solution is thoroughly mixed and filtered through a grid with 1200 resp./cm2advocate for at least 2 hours.

The pooled solution is poured into the prepared capacity and is used for impregnation of wooden structures and carpets, woven materials.

Surface treatment of wood impregnating composition is produced according to GOST 2022.9-76 immersion, brush, conventional spray. Impregnation by immersion aging wooden products should be at least 20-30 minutes. Surface treatment products, structures and coatings by brush and conventional spray is 2 times at positive temperature with a break for at least 2 hours or 3 times at ambient temperature to minus 9-12oC with a break between treatments for at least 6 hours, and heated to a temperature of at least 40oC solution.

Soaked items should not be subjected to additional machining, leading to the removal of the fire-retardant layer. When it is necessary to remove the protective layer from some parts of the protected surface, it is necessary to make additional impregnation solution with a temperature of 50-60oC for two times.

When the impregnation of wood consumption, the heated solution with half-Board processing is 400-500 g/m2when the three treatment cold solution-550-600 g/m2when the impregnation by immersion - 600 g/m2.

The actual flow rate of the composition, depending on the configuration and dimensions of the machined surfaces of structural elements and their associated losses, may increase to 1000 g/m2.

When multiple preventive re-surface treatment of wooden structures may be reduced solution flow rate.

Tests processed the proposed composition of the samples on the fire resistance was carried out according to GOST 16336-76 on installing OTM (combustible materials), GOST 12.2.003-74.

Determined the mass loss of the specimen ( M,%) and the maximum increment of temperature ( Tmax,oC). Largest Tmax > 60oC, M > 60%).

Examples of wooden structures treated with the proposed composition within the range of the contents of the components showed a mass loss when tested for fire resistance 15-19% at the maximum temperature increment 52oC, which characterizes the material as nonflammable.

The diffusion rate of antiseptic in timber amounted to not less than 1 mm/day.

The biopersistence test showed zero destruction.

The method of preparation of the impregnating composition and processing of the materials and designs are simple, clean and provides a surface products with high ognetushitelya and resistance against biological agents. Increased frost resistance of saturated ammoniumphosphate salts composition increased operational and climatic possibilities of applying for external treatment of wooden structures.

Onebusaway impregnating composition containing dissolved antiseptic - silicofluoride ammonium and flame retardant based on ammonium salts, characterized in that the composition contains ammonium sulfate and the addition of NPK as a flame retardant, and optionally contains a sulfonic acid or Netcarity ammonium 2 - 3

The ammonium sulfate - 3 - 5

NPK - 20 - 22

The sulfonic acid or sulfonate - 1 - 2

Water - The Rest

 

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