Fire retardant paints and varnishes are designed to protect the wood products and building elements against fire.
- Fire retardant paints and varnishes
- Types of flame retardants
- mechanism and composition of fire retardant paints and varnishes
- Application method
Oneof the worst troubles, along with floods and hurricanes, a fire, plunged into grief, even the most hardened people.Only in 2012 in Russia there were more than one hundred and ten thousand fires, which killed more than seven thousand people, and the damage is estimated in billions of rubles.There are many causes of fires, from a drunken neighbor on the landing, to the old electrical wiring, or gas stove.However, it all turns out much later, when the wild waste "calm" fire and Statistical Committee received a new report.Of course, to eliminate the careless neighbors or to make repairs in the adjoining houses and cottages is somewhat difficult,
Fire retardant paints and varnishes
Wood is the most common material used, both for construction and for interior design house, apartment, office or other premises.But on a par with great advantages, there is also its most important drawback - it is combustibility.This problem tried to solve even in ancient times, when fire razed entire villages and even cities.While mainly wood impregnated with solutions based on alum and various salts or diluted vinegar.Although these compounds have been used mainly for military equipment (shields, battering rams, siege machines), however, it was the very first protective coatings, reflecting the effect of the fire.Modern fire-retardant coatings are more complex multi-component composition, and manufactured according to the latest chemical technologies, which significantly increases the capacity for better protection against fire.Due to the surface layer, the protective material protects the deeper layers of the wood from burning due to the formation on the surface of wood noncombustible materials.
Types of flame retardants
protivoognevye All materials are of two types - not intumescent and intumescent.They differ from each other in their response to the thermal effect.Intumescent varnishes and paints, under the influence of fire increases its volume, which affects the thickness of the coating, thereby forming a non-combustible "foam" that prevents the penetration of fire into the wood.The fire reaction, increased fire-retardant materials can reach several tens of times, and varies depending on the manufacturer of the product.An important advantage is the fact that after the reaction, the surface of the wooden structure or coating is easily restored by the removal of the foam layer.
not intumescent coating materials when exposed to fire on the surface of the material to form the vitreous coating that prevents further combustion.
All flame retardants paints and varnishes, based on the GOST are divided into three types on the effectiveness of fire protection.The first group includes materials provide nonflammable wood products and building elements and the results of tests which give no more than 9% weight loss of the prototype.The second group includes the fireproofing paints and varnishes providing test result of the sample with a weight loss of 9 to 30%.The third group, include materials giving during the test weight loss of more than 30% of the sample.This information must always be indicated on the packaging or container with fire retardant paint or varnish.
mechanism and composition of fire retardant paints and varnishes
Modern fire-retardant paint materials are composed of many components: resin, blowing salt, stabilizers and heat-resistant material.They differ as to its composition and the degree of fire resistance, as measured by the duration of exposure to fire.
not intumescent coating materials when exposed to fire converted, and with the product of combustion - carbon, creating a kind of glass-composite film which protects the wood from burning materials.This kind of coating made of a liquid potassium silicate glass with additives of quartz sand, kaolin, vermiculite, talc, and other non-combustible fillers.This type of material includes domestic varnishes "Shield-1" Norteks varnish, "Lakron varnish" paint "silicate-O" VUP-2D, and others.
When exposed to fire, a chemical reaction - thermolysis, through which decompose composite components intumescent paints and varnishes.They point out inert gases, preventing the flow of oxygen to the fire and the formation of the graphite foam into solid carbon-coated.This heat insulating layer, prevents the penetration of fire into the deeper layers of wood-based materials and products, and thereby protects them fire element.This type antiognevyh varnishes and paints mainly made of complex organic resins, chlorinated rubber, organic salts, and various non-combustible fillers such as basalt powder, magnesite, chalk, quartz sand.This type of paint materials include domestic paint Phoenix PD, Plamkor-1, "Fire +", the Finnish paint "Pyroplast-HW100" paint and "Non Faye" and others.
Painting or applying fire-retardant paint or varnish is not particularly different from the order with other paints.All work must be performed exclusively at zero temperature and humidity around 70%.The prepared surface should be dry and free from various pollutants in the form of dust, grease and dirt.It should also be taken into account moisture content of wood product or a building element, it should not exceed 10%.Depending on the type of coating, the surface to be primed with the appropriate primer, in case of using ink "Fire +" or one of the components, as when using nail "Shield 1".After drying the surface layer of primer (2 to 4 hours), depositing a first layer of paint or varnish with a brush, roller or spray.This layer should be laid quickly, without correcting the defects.Drying time of the first layer is generally from 4 to 12 hours at a temperature of about + 20 degrees.At the end of this period, eliminate defects painting and second layer.Some flame-retardant paints and varnishes require some time to complete the polymerization process, which can take up to 15 days.It is important to remember that depending on the thickness of fire retardant paint, and it depends retardant efficiency.
When applying fire retardant paint or varnish should carefully read the accompanying instructions as negligent performance of work may negate the expected result.
should take into account that the fire-retardant coating on the log houses, villas, baths or saunas must be applied every year.Because of this, you can protect against fire impact these buildings.
Currently, the range of fire retardant paint products is quite large and is represented by foreign and domestic manufacturers.All products are certified by the relevant authorities and is a guarantee operating between ten and twenty-five years.Therefore the choice of a suitable fire retardant paint or varnish is not always easy to solve problems.First of all, you should determine the cost of your desired cover a certain group of fireproof efficiency, and only then proceed to the selection and acquisition of your desired material.You also need to pay attention to the amount of paint or varnish for application of fire-retardant coating.For example, the nail "Negorin-1" has a flow rate of 350 grams per square meter, and lacquer "Shield-1" - 800 grams per square meter;paint "Defender W» - 1,53 kg per square meter, and paint "Fire +" - just 520 grams per square meter.It is based on achievement of the first group of fireproof efficiency and almost one price range.Foreign paints have such flow on the coating run, but at the same time expand several rates.For example, if the paint is "Defender W» costs about 250 rubles per kg, the Universal Paint "Barrier-87" - 650 rubles, and paint "Aznar" - more than 750 rubles.
And so if you want to get high-quality and inexpensive product, choose varnishes domestic producers.