This product improves adhesion by direct bonding to the metal surface, and obviously improves the adhesion and fastness of the coating on hard-to-adhere metals and plastics, and obviously improves the water resistance and boiling resistance of the coating as well as the salt spray resistance and solvent resistance, and the hardness and wear resistance are also improved. The adhesion group interacts with the metal surface, and the adhesion promoter is well oriented in the substrate, thus improving the adhesion. Pre-coated panels after stretching, bending and calendering. Reduces corrosion at scratches, such as after salt spray test or water immersion test. The adhesion promoter contains a large number of substrate reactive groups, which can easily cross-link with the hydroxyl groups in the substrate system.
Towards the trend of intumescent fire protection systemization
Intumescent fire protection system is a newly developed halogen-free flame retardant system. The system has high flame retardant properties, no dripping, low smoke, and non-toxicity during the combustion process. This type of flame retardant is composed of an acid source, a carbon source and a foaming source. The acid source is generally an inorganic acid or a salt that can generate an acid when burned, the carbon source is a carbon polyol compound, and the foaming source is a compound such as amine or amide. Intumescent fire-retardant system flame retardants were first used in the coating industry to prepare fire-retardant coatings for ships, ptfe modified pe wax sds building decoration materials, cable sheaths and other materials. In recent years, thin-coated steel structure fireproof coatings and ultra-thin steel structure fireproof coatings have been used at home and abroad.
Intumescent fire-retardant system flame retardants have attracted people’s attention due to the advantages of less smoke, no dripping and no toxic gas generation during the combustion process. Many flame retardants in intumescent fire protection systems do not contain halogen compounds to achieve high flame retardancy, low smoke, and low toxic gas. These are just in line with some specifications established for the combustion of polymer materials. The flame-retardant mechanism of the intumescent fire-retardant system is that it can form a honeycomb-shaped carbon layer when heated, and protect the underlying substrate from the flame through its thermal and oxygen barrier function. It can be said that the excellent fire resistance performance of the intumescent fire retardant system flame retardant excipient fire retardant coating is unmatched and irreplaceable by other flame retardant systems. At the same time, it will not bring the smoke, poison and poison of the usual halogenated hydrocarbon flame retardants.
Because of its corrosive effect, it has always occupied a leading position in fire-resistant coatings, especially since the mid-1970s, with the mass production of ammonium polyphosphate, making it the leading product in fire-resistant coatings. Intumescent fire-retardant system flame retardant is a type of phosphorus and nitrogen system type composite flame retardant. It has the synergistic effect of phosphorus and nitrogen system type composite flame retardant PN. It is a type of three groups of carbon source, acid source and gas source. The intumescent flame retardant divided into the same body is also a new type of green and environmentally friendly flame retardant. It has a very good flame retardant effect. It not only has a good flame retardant effect, but also is non-toxic, and does not produce dense smoke and poisonous gas when burned. , No environmental pollution, rich sources of raw materials, so it is of great significance to develop flame retardants for intumescent fire protection systems with low price and good flame retardancy.
Towards a non-halogenated trend
So far, most of the sun-burning agents such as building materials and plastics have been used in combination with organic halides and antimony trioxide. These sun-burning agents have good flame retardant effects and have little impact on the physical properties of the products, but the major disadvantage is that they are toxic. It will produce toxic gas and a large amount of smoke when burning, so it is subject to certain restrictions in application. In recent years, the demand for non-halogenated flame retardants has been increasing, and the research and development of non-halogenated high-performance inorganic flame retardants has become the main trend in the development of flame retardants. Since most halogen-containing flame retardants release gases harmful to the human body, non-halogenated flame retardant materials are required. The key of non-halogenation technology is to solve the problems of ultra-fineness and surface treatment of solid particles, and also to consider the problems of particle formation and distribution and purity. Inorganic flame retardants not only have good flame retardant effects, but are also non-toxic. They do not produce dense smoke and poisonous gas when burned. They have abundant sources of raw materials and low cost. Therefore, it is of great significance to develop inorganic flame retardants and obtain low-cost, good flame retardant flame retardants.
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