Introduction to the types of fireproof coatings and the principle of fireproofing

The types of fire retardant coatings can be divided into:

1.Fire retardant coating for steel structure, suitable for fire protection of steel structure building.

2.Decorative fire retardant coating, suitable for fire protection of wood structure buildings, wood products, flammable materials, paper products.

3.Fire retardant coating for concrete structure, suitable for fire protection of tunnels and fire embankments.

4.Flame retardant coating for cables, suitable for fire protection of cables.

Fire retardant coatings are water-based and solvent-based.

From the principle of fire protection, it can be divided into: intumescent and non-intumescent.

The fire protection principle of intumescent fireproof coating is that the coating expands when exposed to fire to form a heat-insulating fireproof coating, which effectively reduces the heat transfer to the surface of the steel structure, thereby improving the fire resistance time of the building.

Non-intumescent fire retardant coatings that improve the fire resistance of buildings through their own low thermal conductivity.

In our daily life, the most common thing to say is fire and electricity, and doing these can avoid a lot of unnecessary losses. We specialize in fire prevention.

of fire retardant coatings.

With fire retardant coatings, we can rest assured, how much do you know about fire retardant coatings? Today we will take a look at the types of fire retardant coatings and the principle of fire protection.

Fireproof coating can be imagined as a kind of coating first, but this coating is not a general coating, this coating is used on the surface of some flammable materials, so that the characteristics of this flammable material can be changed, and when a fire occurs, it can effectively resist the spread of fire, so it is mostly used in some building components, and the use of fireproof coating can improve the fire resistance of building components.

How does fire retardant coating work?

First of all, the fire retardant coating itself is not flammable and difficult to burn, after using the fire retardant coating, the protected material is cut off from contact with the air, so that the rate of combustion can be reduced and the material can be delayed from ignition. Fire retardant coatings also have very low thermal conductivity, which can also delay the temperature of the fire and reduce the heat transfer to the protective material.

Fire retardant coatings can also decompose a gas when exposed to heat, which is an inert gas that is not combustible, so it can detainate the combustible gas that decomposes after the protective object is heated, which can also slow down the rate of combustion.

If the fire retardant coating contains nitrogen, the decomposed ammonia and nitric oxide can react with some organic free radicals, and then form a chain of interrupted reactions, which can also reduce the combustion temperature.

Some fireproof coatings are intumescent, and this kind of coating will expand after being heated, and then form a thermal insulation layer and then seal the protected object, so as to delay the transfer of heat like a protective object, and can also play a role in fire prevention.

What are the types of fire retardant coatings?

When the principle of fireproof coatings is introduced above, we can see that some fireproof coatings contain nitrogen, and some are still intumescent type, and it can be seen that there are many types of fireproof coatings, but if we have to classify, we can divide the fireproof coatings into decorative fireproof coatings and steel structure fireproof coatings.

The finishing type is mainly to protect the flammable material, which is decorative and waterproof, and the red can be divided into water-based and solvent-based.

The coating used in this coating of steel structure will be relatively thick, the coefficient of thermal conductivity is relatively low, and it has good thermal insulation performance, which can be divided into organic and inorganic fire retardant coatings.

The above is the type of fire retardant coating and the principle of fire retardant introduced for you, do you understand it, if there is a better answer, please share with us.

Fireproof coatings can be divided into: steel structure fireproof coatings, decorative fireproof coatings, concrete structure fireproof coatings, and cable fireproof coatings.

Fire retardant coating from the principle of fire protection mainly plays the role of passive fire protection, after the fire, the construction of fire retardant coating components can meet the fire protection requirements of building design.

Now the implementation of the national standard for fireproof coatings stipulates that fireproof coatings are as follows:

1.Fire retardant coatings for steel structures.

2.Decorative fire-retardant coatings.

3.Fire retardant coatings for concrete structures.

4.Fire retardant coatings for cables.

According to the current national standard, the steel structure fire retardant coating is divided into:

1. Place of use: divided into indoor and outdoor.

2. Diluent types: water-based and solvent-based.

3. Fire protection principle: expansive and non-expansive.

4. Fire category: ordinary fiber fire and special hydrocarbon (HC) fire.

Combustion is a rapid and violent oxidation reaction with flame, the reaction is very complex, and the generation and conduct of combustion must meet three conditions at the same time, namely combustible substance, accelerant and ignition source. In order to stop the combustion, it is necessary to cut off any of the three elements of the combustion process, such as lowering the temperature and isolating the air or combustibles.

Fire retardant coating is based on the basis of combustion, used on the surface of the combustible substrate, to reduce the flammability of the surface of the coated material, to delay the rapid spread of fire, to protect the substrate from direct contact with the air, to delay the ignition time and combustion rate of the object, or to decompose the non-combustible inert gas, dilute the combustible gas decomposed by the heat of the protected object, so that it has flame retardancy or non-combustibility, is a special coating used to improve the fire resistance limit of the coated material.

The fire protection mechanism of fire retardant coatings can be roughly summarized into the following five points:

1) The fire-retardant coating itself is flame retardant or non-combustible, so that the protected substrate is not in direct contact with the air, delaying the object to catch fire and reducing the speed of combustion.

2) In addition to the flame retardant or non-flammable coating, it also has a low thermal conductivity, which can delay the transmission of flame temperature to the protected substrate.

3) The fireproof coating is heated and decomposes into non-combustible inert gas, which dilutes the flammable gas decomposed by the heat of the protected object, so that it is not easy to burn or the combustion speed is slowed down.

4) The nitrogen-containing fireproof coating is decomposed into NO, NH3 and other groups by imitating the first rental heat, which is combined with organic free radicals to interrupt the chain reaction and reduce the temperature.

5) The intumescent fireproof coating expands and foams when heated, forming a carbonaceous foam insulation layer to seal the protected object, delay the transfer of heat and the substrate, and prevent the object from catching fire and burning or reducing the strength caused by the increase in temperature.

In addition, fire-retardant coatings also have anti-rust, waterproof, anti-corrosion, wear-resistant, heat-resistant, as well as coating toughness, colorability, adhesion, easy drying and certain gloss and other performance characteristics. According to its use field, it can be divided into: decorative fireproof coatings, wood fireproof coatings, steel structure fireproof coatings, concrete structure fireproof coatings, tunnel fireproof coatings, cable fireproof coatings, etc.

Summary. Hello! Fire-retardant coating is to brush the paint on the surface of the material, which can improve the fire resistance of the material, slow down the spread of flames, or stop combustion within a certain period of time, this kind of coating is called fire-retardant coating, or flame retardant coating.

Fire retardant coating is a special coating used on the surface of flammable substrates, which can reduce the flammability of the surface of the coated material, block the rapid spread of fire, and improve the fire resistance limit of the coated material. It is applied to the surface of a flammable substrate to change the combustion characteristics of the material surface and prevent the rapid spread of fire; or applied to building components to improve the fire resistance limit of special coatings, called fire retardant coatings.

What is Fire Retardant Coating The principle and material composition of fire retardant coating.

Hello! Fire-retardant coatings are brushed on the surface of the material, which can improve the fire resistance of the material abrasive, slow down the spread of flames, or stop combustion within a certain period of time, this kind of coating is called fireproof coating, or flame retardant coating. Fire retardant coating is a special coating used on the surface of flammable substrates, which can reduce the flammability of the surface of the coated material and delay the rapid spread of fire, so as to improve the number of refractory poles of the coated material.

It is applied to the surface of a flammable substrate to change the combustion characteristics of the material surface and prevent the rapid spread of fire; or applied to building components to improve the fire resistance limit of special coatings, called fire retardant coatings.

Principle: Prevents heat transfer or slows down the rate of flame burning.

Material composition: cementing material (Portland cement, shed cracked magnesium chloride or inorganic high-temperature binder, etc.), aggregate (expanded vermiculite, expanded perlite, aluminum silicate fiber, mineral wool, rock wool, etc.), chemical additives (modifier, hardener, waterproof chain dismantling agent, etc.), water. Portland cement, magnesium chloride cement and inorganic binders for steel structure fireproof coating base materials, commonly used inorganic binders include alkali metal silicates and phosphate Yuqing substances.

Coatings will be used in house decoration, and fireproof coatings are preferred. Many people confuse fireproof coatings with fireproof paints, but in fact, there is a difference between the two. What's the difference between the two? What are the types of fire retardant coatings? Today, let's talk about the problem of fire retardant coatings.

First, the difference between fireproof paint and fireproof paint.

1. The concept is different.

Fire retardant coating: Fire retardant coating is a special coating used on the surface of flammable substrates, which can reduce the flammability of the surface of the coated material and block the rapid spread of fire, so as to improve the fire resistance limit of the coated material. In addition to flame retardant, fire-retardant coating on the surface of the substrate also has the properties of anti-rust, waterproof, anti-corrosion, wear-resistant, heat-resistant, coating toughness, colorability, adhesion, easy drying and certain gloss.

Fireproof paint: fireproof paint is a flame retardant coating made of film-forming agent, flame retardant, foaming agent and other materials.

2. Different classifications.

Fire retardant coatings can be divided into decorative fire retardant coatings, cable fire retardant coatings, steel structure fire retardant coatings, rubber dust fibers, prestressed concrete floor slab fire retardant coatings, etc.; Fireproof paint can be divided into three categories: wood fireproof paint, veneer fireproof paint, and steel structure fireproof paint.

From the above content, it can be seen that the concepts of the two are completely different, and there are similarities and differences in classification, and the classification of fire retardant coatings is more comprehensive. Although these two are different, they are both very good fireproof materials, and they are almost identical in terms of purpose. However, when buying fireproof coatings or fireproof paints, you must buy them on demand and distinguish them clearly.

Second, the types of fireproof coatings.

There are many types of fireproof coatings, but according to the use of fireproof coatings and the thickness of fireproof coatings, they are generally divided into decorative coatings and steel structure fireproof coatings.

Facing fireproof coatings are generally used as protective materials for combustible substrates, which have certain decorative and fireproof properties, and are divided into two categories: waterborne and solvent-based. The steel structure fireproof coating is mainly used as a protective material for non-combustible components, the coating of this kind of fireproof coating is relatively thick, and the density is small, the thermal conductivity is low, so it has excellent thermal insulation performance, and is divided into organic fireproof coating and inorganic fireproof coating.

It can be seen that there are differences between fireproof coatings and fireproof paints in the concept and classification, among which there are many types of fireproof coatings, but according to the use of fireproof coatings and the coating thickness of fireproof coatings, they are generally divided into decorative coatings and steel structure fireproof coatings.