Paint material with biocidal properties

 

(57) Abstract:

The invention relates to the technology of paint and varnish materials for painting different surfaces (wood, concrete, brick, and so on) to reduce the level of microbial contamination. Paint material contains a binder (alkyd, linseed oil, etc.), pigment, filler, phosphate or acetate, guanidine, organic solvent or water and the preparation of nanostructured particles of silver containing silver nanoparticles in combination with dioctylsulfosuccinate sodium, quercetin (3,5,7,3',4'-pentahydroxyflavone), with the addition of water and isooctane at certain ratios. The coatings obtained on the basis of this material, paint, have good mechanical and barrier properties and a high degree of inactivation of microorganisms on the surface of the material. 3 table.

The invention relates to the technology of paint and varnish materials for painting walls, ceilings, concrete, brick, wood surfaces to reduce the level of microbial contamination areas in hospitals, schools, kindergartens, offices.

Recently razrabatyvaut Gisenyi and sporicidal properties.

For the purposes of disinfection were synthesized various antiseptics, among which a special place is occupied by the derivative of polyguanidine: chlorides and phosphates of guanidine (EN 2142451, 1999, EN 2145307, 2000).

Known biocidal paint using polyhexamethylene guanidine phosphate [EN 2133256, 1999]. Antiseptic dye is injected in the amount of 3-7 wt.%, as a binder paint contains lumberport that require high temperature curing from 140 to 250oC. Specific indicators bactericidal activity of coatings on the basis of these colors in the patent is not given.

In the patent RU 2131897, 1999 described biocidal paint "Biograph using as a biocide salts of polyguanidine. Thus, in the table. 1 of the patent specified time limit is reached, inactivation on surfaces painted with paint containing 5% of polyhexamethylene guanidine phosphate. Full bactericidal inactivation surfaces, painted with alkyd, oil paint, comes after 10 min, water after 30 minutes the Viral inactivation oil paint comes in 10 min, pentaftalevyh enamel PF-115 after 24 h, fungicidal inactivation on the surface of the alkyd and water-based paint does not occur h the AET after 3 h (level - 86%) and pentaftalevyh enamel (level - 86%).

Long known biological activity of silver ions: silver spoon, "Holy" Church water. Know the use of colloidal silver as an antiseptic in the amount of 110-4-110-2wt. % in cosmetology (EN 2140516, 2000).

In the last decade successfully applied nanosized metal particles - after ultra-small aggregates of metal with a diameter of the order of nanometers (1nm= 10-9m).

Patented method of preparation of nanostructured metal particles by metal ion reduction in the system of reverse micelles (EN 2147487, 2000). The method includes preparing oratorically dispersion of reducing agent based on the solution of surface-active substances (surfactants) in a non-polar solvent, as the reductant used substance from the group of flavonoids, as the use of surfactants bis-2-ethylhexylphthalate sodium, and as a non-polar solvent used saturated hydrocarbons. The method allows to increase the lifetime and the rate of formation obtained nanostructured metal particles and to eliminate the need to create anaerobic conditions for their synthesis. The concentration of surfactant in limiting ubiraetsa range of 410-5-2210-5M. the Concentration of metal salt in oratorically dispersion ranges from 310-4to 310-3M is the Ratio of molar concentrations of water and surfactant in oratorically dispersion aqueous solution of metal salt varies in the interval 0,.9 to 1.2.

As metal ions using silver ions, copper, iron, Nickel.

The nanoparticles get in the form of liquid solution in the limiting hydrocarbon. It was found that solutions of silver nanoparticles synthesized by the above method, when you enter them in the formulation of paints inform these paints high biocidal activity against the microorganisms of different species.

So, with the introduction of a solution of silver nanoparticles in the number 0,00016 wt.% (in terms of ions Ag+the water-dispersion paints the level of inactivation of bacteria E. Li after 30 min and 1 h after infection painted surface is significantly greater than obtained for the paint without nanoparticles or with the addition of 0.5 wt.% Pgmg. Virucidal and fungibility effects observed for this paint with silver nanoparticles on the contrary, less than paints with pgmg.

("Coating materials and their application", 2-3/2001, S. 3-7, PL. 3). When was widebodies significant excess of inactivation of bacteria compared with the same paint, containing pgmg.

Virucidal and fungicidal activity of silver nanoparticles and pgmg in alkyd enamel PF-115 was practically the same and ensure the complete inactivation of microorganisms already after 2 h of contact (ibid, PL.1). In water-based paint activity of the nanoparticles with respect to these microorganisms was lower than pgmg (ibid, PL. 3).

Sporicidal activity of both bipedal as in water-dispersion paint and alkyd enamel made it possible to achieve a higher level of inactivation compared with the control, but did not provide complete inactivation even after 7 days of exposure (ibid, PL. 1,3).

From the obtained data it becomes apparent that the silver nanoparticles and chemical biocide vary the speed of inactivation and their action against various microorganisms.

The technical task of the present invention is to increase the inactivating action of paint materials by incorporating biedny additives, distinguished by the level of inactivation of microorganisms of this type on the painted surface.

To achieve the technical result of the paint material with biocide svoji solvent or water, further comprises the preparation of nanostructured particles of the silver composition, wt.%: silver nanoparticles, in terms of Ag+0,0148-0,148, dioctylsulfosuccinate sodium 6,1-12,2, quercetin 0,0704-0,0767, water - 1,1-1,64, isooctane - the rest, the components of paint material, taken in the following ratio, wt.%:

Binder - 18-70

Pigments - 12-23

Fillers - 0-44

Phosphate or acetate, guanidine - 0,8-1,5

The preparation of nanostructured particles of silver - 0,58-1,1

An organic solvent or water - the Rest

As a binder used alkyd varnish PF-060, drying oil K-2, K-4 and the other for organic paint materials.

For water-dispersion paints use polyvinyl acetate dispersion, acrylic dispersion "Gramos-101" (TL6-02-057-593-134-93) and others. As pigments used titanium dioxide, zinc, chromium oxide, crowns lead and others. Fillers: chalk, barite, talc, mica and others.

For water-dispersion paints require the use of functional additives: Converter, emulsifier, dispersant, thickener, coalescent and others.

For alkyd paints and varnishes should be secterianism basic substance 6515%, pH of 1% aqueous solution 4,51. The biocide used in the composition of the water-dispersion paints and varnishes.

As acetate, guanidine use its alcoholic solution. Description: M M 10000-12000, the refractive index at the 15oWith a 10% solution 1,3940, the specific viscosity 1,8205 shown 0.02 l/,

Way to obtain is to carry out the condensation in the melt diamine salt of guanidine at 180-200oC for 1-2 h at a molar ratio of the diamine to the halogen (salt pgmg) 1:(1,2-2). Obtained the hydrobromide of guanidine 11,16 g (0.05 EQ) are dissolved in 50 ml of acetic acid at a temperature of 75-85oWith vigorous stirring to obtain a homogeneous mass. The cooled mixture was added a solution of 4.10 g (0.5 EQ) of anhydrous sodium acetate in 10 ml of acetic acid, the mixture is intensively stirred, incubated at room temperature for 30 min, filter the solution from the precipitated sodium bromide, and evaporated under vacuum.

The method of obtaining the specified biocide described in the applications 2002100230/04 and 2002100263/04 from 11.01.02.

The preparation of nanostructured particles of silver (TU 24990001-54850797-01) is characterized by the following indicators: the transparent the IOM 420-440 nm, the optical density at the maximum absorption band of not less than 0.6.

In the preparation includes: dioctylsulfosuccinate sodium firm Aldrich, Switzerland, purity 96% directory 2000 D 20,117-0, quercetin (3,5,7,3', 4'-pentahydroxyflavone - C15H10O72H2O) the company ICN, USA, purity 99%, catalog 2000, 152003. The isooctane (CH3)2CH(CH2)C(CH3)3GOST 12433.

When using the preparation of silver nanoparticles in paint materials in quantities of 0.58-1.1 wt.% concentration of the nanoparticles in terms of Ag+of wt. %: 0,58-2,5910-4; 0,73-3,2410-4; 0,88-3,8910-4; 1,1-4,8610-4.

In paint materials using 10% solutions of phosphate and acetate, guanidine content of biocide is: 0,05-0,0975%.

Paint preparation

Traditionally: obtaining a pigment paste in speed dissolver, then the dispersion in a bead mill until the desired degree of milling, mixing with the remainder of the binder, the addition of functional additives. Coating materials applied by spray, roller or brush.

In table.1 shows the formulation of paints and varnishes, in table.2 - pokesav.

Paint material with biocidal properties, containing a binder, a pigment, it is possible filler, phosphate or acetate, guanidine, organic solvent or water, characterized in that it further comprises the preparation of nanostructured particles of the silver composition, wt. %:

Silver nanoparticles, in terms of Ag+ - 0,0148-0,148

Dioctylsulfosuccinate sodium - 6,1-12,2

3,5,7,3,4-Pentahydroxyflavone - 0,0704-0,0767

Water - 1,1-1,64

The isooctane - Rest

and components of the paint material is taken in the proportions, by weight. %:

Binder - 18-70

Pigment - 12-23

Filler - 0-44

Phosphate or acetate, guanidine - 0,8-1,5

The above preparation of nanostructured particles of silver - 0,58-1,1

An organic solvent or water - the Rest

 

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FIELD: fireproof paint-vehicle protective materials.

SUBSTANCE: claimed paint contains polymeric binder, solvent and blowing additive consisting of pentaerythritole and ammonium polyphosphate at ratio of 1:1.3-2.6, respectively, and in addition expanded graphite. Materials of present invention useful in building industry, aviation, railway transport, etc.

EFFECT: paint with improved functionality, increased fire resistance, and expanded blowing temperature interval.

3 cl, 4 ex, 2 tbl

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