How to use intumescent fire retardant coatings, and is non intumescent fire retardant coatings thick

First, its own characteristics.

First of all, this fire retardant coating itself is relatively difficult to burn, and not easy to burn the substance, so it can be applied to the base layer can well protect the base layer from direct contact with the air, so as to delay the object on fire or reduce their burning rate.

Second, the thermal conductivity is low.

In addition, in addition to the characteristics of this coating itself, it is also that their thermal conductivity is very low, which can well delay the transmission of the temperature of the flame to the protected substrate, which can also prevent the spread of fire.

3. Decompose inert gas.

The third point is that our fire-retardant coatings can produce inert gases that do not burn after heating, which can also dilute the flammable gases in the combustion process, which can also reduce the speed of combustion, or make it less combustible.

Fourth, the terminal combustion reaction.

The fourth point is that for some nitrogen-containing fireproof coatings, if it is heated, it will decompose groups such as NO and NHZZ3, which will be combined with organic free radicals, which can well terminate various combustion reactions, so as to reduce the temperature and prevent it from combusting.

5. Carry out closed protection.

It is to expand and foam, and the carbonaceous foam insulation layer formed by this can protect the coated object well, so as to delay the heat transfer to the object and prevent the object from catching fire due to the increase in temperature and the decrease in strength.

The intumescent fire retardant coating applied to the surface of the steel structure can effectively improve the fire resistance of the steel structure components, so as to achieve the design fire resistance level of the steel structure building. The use of intumescent fire retardant coatings is as follows:

1.Spray coating. 2.Brushing.

3.Roller coating. 4.Smear.

Select the appropriate construction process according to the characteristics of the purchased fireproof coating.

Intumescent fire retardant coatings are thin.

Because most of the thick hidden fire retardant coatings are basically not expansion type, so it is easy to distinguish, and there is a certain difference between thin fire retardant coatings and thick fire retardant coatings in nature, the principle of thin fire retardant coatings is that once the paint itself encounters fire, it will expand, and automatically form a fire stove macro stupid layer to improve the combustion time, which also increases the time of absolute fire resistance.

Thick fire-retardant coatings can only rely on their own performance characteristics, because the thermal conductivity of thick fire-retardant coatings is relatively low, even if it does not expand, it can also have high fire resistance, so the coating thickness between the two is different.

Thick-coated steel structure fire retardant coating is a non-intumescent steel structure fire retardant coating, which improves the fire resistance time of building components through its own low thermal conductivity.

It does not expand when it encounters fire, does not burn, does not release harmful gases in the event of a fire, and only produces a small amount of dust during stirring, so it is a green building materials product, with stable fire resistance and long service time. Disadvantages: self-weight, not suitable for the use of light steel.

In the composition of non-intumescent fire retardant coatings, flame retardant (fire retardants) must be contained, such as phosphorus and halogen.

organic matter (e.g., decabromodiphenyl ether), sodium borate.

Three noisy celebrations do antimony oxide and so on. Sodium borate is particularly suitable for use as an ethyl acetate forme.

It is a flame retardant for emulsion, and the amount of liquid balance added is calculated as 10% solution, accounting for 40% and 60% of the polymer.

Antimony trioxide.

The flame retardant ability itself is not high, but when it is in the early stage of combustion, it can be born antimony trichloride, for example, when used in combination with chlorinated paraffins, it will exert excellent flame retardant ability.

Intumescent fireproof coating construction method pro! Hello, I am glad to answer for you<> the construction method of pro-intumescent fire retardant coating is as follows: 1

Roller coating method. This method is also a method of application that can be seen often. Apply the paint to the roller first, then grasp the end of the pole and hold the roller to roll back and forth to stick the paint to the wall.

The roller is hollow in the middle, cylindrical in shape, with long pile made of synthetic fibers glued to the surface, and a stick for long-distance application. The roller coating method is long and laborious, and is generally used for wall painting. 2.

Brush application. This method is somewhat similar to the roller method, but the brush method has a shorter stick, so it can only be applied at close range. The brushing method can enhance the adhesion of the surface of the paint by applying force to its short force, and in the details of processing, the brushing method can also be applied more comprehensively and carefully, but its efficiency is low and it is also very troublesome.

Theoretically, the brushing method can be applied to walls and other objects of any shape. 3.Spraying method.

Spraying is a relatively new method of application, and it is less common than the other three. The spraying method mainly uses a reed spray gun to atomize the paint and then spray it on the surface of the substrate. Relatively speaking, this method has the highest application efficiency and a more uniform surface quality after spraying, but it has high technical requirements for workers, and the mist gas is easy to be inhaled into the body and may cause potential harm.

When carrying out the construction of fireproof coatings, it is necessary to carefully consider which method to choose to avoid the waste of materials and manpower caused by the wrong method. Hope mine can help you <>

Do you have any other questions?

The thick construction method of the steel structure of the anti-Wang Sui fire coating is as follows:

1. Before the construction of thick fireproof coatings, the surface of steel structure components should be derusted and anti-rust. The rust primer coating should meet the design requirements and the current relevant national specifications, and it is also necessary to completely remove dust, oil and other debris on the surface of the steel components.

2. During construction, the walls, doors and windows, mechanical equipment and other components that do not need fire protection should be covered and dismantled.

3. Before spraying, the steel structure interface agent should be brushed once, and then the coating method of spraying or plastering should be used after the interface agent is dry, and the coating method used is the same as the cement plastering method.

4. Before coating, mix and stir evenly according to the ratio of powder: emulsion = 1: royal object 1 to make it appear as a thick fluid without agglomeration.

Note: The consistency should be determined according to the coating method, so as to facilitate construction, not flowing, and firm bonding. For extra-wide and large steel, steel frame mesh should be added to prevent paint leakage or separation.

5. When using spraying method for painting, it is necessary to use a concave-convex bucket spray gun, the air pressure is to, and the diameter of the spray gun mouth should be 6 to 10mm. The spray gun is perpendicular to the surface of the component to be painted, and it is advisable to use 40 to 60 cm. It should be noted that the first spraying construction should not be too thick, and after it is dry, the next construction will be carried out until the thickness specified in the standard is reached.

Fire retardant coatings

Fire-retardant coatings are brushed on the surface of those flammable materials, which can improve the fire resistance of the material, slow down the spread of flames, or stop combustion within a certain period of time.

Construction method of intumescent steel structure fireproof coatings: There are two kinds of intumescent steel structure fireproof coatings on the market, namely the original ultra-thin and thin.

Thin (intumescent steel structure fireproof coating) has particles suitable to make the difference by spraying construction.

Ultra-thin type (intumescent steel structure fireproof coating) delicate type, suitable for the use of airless spraying, brushing, roller coating to apply the slippery work.

1. Film-forming substances: This kind of film-forming substances are required to have good usability at room temperature and can adapt to foaming at high temperatures. Commonly used are:

Synthetic resin acrylic emulsion, polyvinyl acetate emulsion, epoxy resin, polyurethane, epoxy polysulfide, etc. They are combined with organic flame retardants to give the coating good flame retardancy.

2. Carburizer: Under the action of high temperature and flame, the substance that can be quickly carbonized is called a carbon-forming agent. They are the material basis for the formation of the carbonization layer of foam, usually polyhydroxyl compounds containing high carbon, such as starch, pentaerythritol and organic resins containing hydroxyl groups.

Dehydration to carbonization catalyst: The main function is to promote the dehydration and carbonization of organic matter containing hydroxyl spike to form a non-flammable carbonaceous layer. Such substances mainly include ammonium polyphosphate, ammonium dihydrogen phosphate and organophosphate.

3. Small foaming agent: The foaming agent can decompose a large amount of extinguishing gas when the coating is heated, so that the coating expands to form a sponge-like fine bubble structure, such substances are: ammonium phosphate, ammonium polyphosphate, urea, melamine, dicyanide, guanidine, chlorinated paraffin (70%), etc.

4. Fillers and pigments: Usually inorganic pigments and fillers are flame resistant, which can increase the flame resistance of the coating. Commonly used are:

Mica powder, talcum powder, asbestos powder, kaolin, zinc oxide, titanium dioxide, calcium carbonate. Aluminum hydroxide, zinc borate, barium metaborate, antimony trioxide, etc.

How to choose fire retardant coatings?

1. The quality of fireproof coatings on the market is different, and we should go to the formal place to buy when purchasing, such as buying in brand chain stores or buying in the regular building materials market. Don't be greedy for cheap to buy fire retardant coating products from itinerant vendors. When purchasing fire-retardant coatings, we try to choose well-known local paint brands, such as Sherwin-Williams, Lanling, PPG, Sika and so on.

2. There are different types of fireproof coatings such as steel structure and wood structure fireproof coatings, and we need to choose the appropriate fireproof coatings according to the use occasions when purchasing. You can't paint the steel structure fireproof coating on the wood, which will easily cause the fireproof coating to fall off. When purchasing, we need to carefully check the product description to understand which occasions this type of fire retardant coating is suitable for.

3. When purchasing fireproof coatings, we also need to pay attention to the fireproof and flame retardant properties of the product. According to the relevant regulations, fireproof coatings can be divided into grade I and grade II according to their flame resistance, of which the flame resistance of grade II fireproof coatings is better. You can choose according to your needs.

When purchasing, we also need to check whether the packaging of the product is damaged, whether the product has expired, whether there is a certificate of conformity, etc.

Intumescent fireproof coatings include ultra-thin fireproof coatings for steel structures, fireproof coatings for thin steel structures, and fireproof coatings for thick steel structures.

1. Ultra-thin fireproof coating for steel structure.

That is, the coating thickness is not more than 3mm of the material, the decoration is good, foamable, high temperature and fire resistance time within 2 hours of structural fire retardant coatings, and now there are also ultra-thin fire retardant coatings with fire resistance time.

2. Thin steel structure fireproof coating.

That is, the coating thickness is greater than less than and has certain decorative properties. It expands and thickens at high temperatures. The fire resistance time of fire retardant coatings for steel structures is 2 hours, and now there are also fire resistance limits of hours.

This kind of steel structure fireproof coating generally uses appropriate water-based polymer materials as the base material, in addition to flame retardants, flame retardant fluids, refractory fibers, etc., and its fire protection mechanism is the same as that of ultra-fine.

3. Thick steel structure fireproof coating.

This is a kind of steel structure fireproof coating with a coating thickness greater than 7mm and less than 45mm on the vertical side, dense particle surface, low thermal conductivity, and fire resistance limit greater than 2h. It is mainly composed of inorganic materials, with stable fire resistance and good long-term use effect, but the fly in the ointment is that the coating particles are large and the coating appearance is uneven, which affects the overall appearance of the building.

Tips for choosing fire retardant coatings

1. The performance of fire retardant coatings in different spaces is different. Therefore, when purchasing coatings, you can ask experienced store sellers to use suitable fire-retardant coatings in the right places to achieve the best flame retardant effect.

2. Fire resistance must be checked when purchasing. When the intumescent fire retardant coating is burned by a strong fire, it will blister and expand in large quantities, and the surface will accumulate and bulge. In the case of wooden substrates, the phenomenon of burning and damage occurs very quickly.

3. Inquire about the market, if the price is lower than this, the quality is worrying. Therefore, when shopping, don't be greedy for cheap, otherwise you will buy substandard quality and environmentally friendly products.