No halogen environmental protection flame retardant

No halogen environmental protection flame retardant

Expansion type flame retardant is in recent years, the development of halogen-free flame retardant environmental protection, has a unique mechanism of flame retardant and halogen free, low smoke, low toxicity, conform to the requirements of the ecological environmental protection, halogen free flame retardant environmental protection is an important way of no halogenated flame retardants.

Expansion flame retardant system because of its "three sources" (acid source, carbon source, air source) of synergy when burnt in material surface density of porous carbon foam layer, can prevent the further degradation of the inner layer polymer and the surface of the fuel to release, but also prevent heat transfer to polymer and isolated from oxygen source, to prevent the spread of flame and spread.

Compared with the traditional phosphorus-containing flame retardants, intumescent flame retardant agent in the combustion process greatly reduces the toxic and corrosive gas generated, so the flame retardant world acclaimed, will become the mainstream of the development of flame retardants in the future.

Nanotechnology is one of the basic technologies needed to develop information technology and solve environmental problems. Nanometer materials are made of nano-technology, and its particle size reaches nanometer scale. Nanomaterials have high technology content and high quality. Nano - grade flame retardant is the new development direction of flame retardant. Such as nano-grade magnesium hydroxide with high purity, super particle size, good flame retardant performance and development potential.

Added in the synthetic fiber masterbatch flame retardants is one of the important methods to solve the problem of durability of synthetic fiber flame retardant, but there is strength decline and subsequent flame retardants in dyeing and finishing part easy leakage and fire retardant and dyestuff chemical reaction and lead to problems such as lower flame retardant effect. Therefore, the development direction of the flame retardant is the development direction of the development of the properties stable in the subsequent dyeing and finishing.

Microcapsule technology can be used, foam coating, surface grafting technology to flame retardant finishing of textiles, such as can not only reduce sewage quantity, and can obtain durable flame retardant effect, but the cost is high, the application is more difficult. With the development of science and technology, some new halogen-free green flame retardants will have good prospects.

In conclusion, the research and development of low-toxicity, harmless and smokeless green flame retardant and its application process is the main trend of the development of flame retardant.

BL2 is widely used in the application of green flame retardant, which can be used for flame retardant treatment of artificial plate, solid wood, textile and paper etc. Which applied in the urea glue man-made board not only can make the plank to flame retardant grade, and can effectively reduce the formaldehyde content in plank, promote the environmental protection level, have the effect of a dose of double effect.

Because BL2 environmentally friendly flame retardant and environmental friendly, high efficiency and low cost advantage, make its get innovation on forest grassland fire application, in the sensitive area of easy fire fire experiment has achieved significant effect. The application of BL2 green flame retardant for forest farm of loess in pingquan county in hebei province has been tested in different concentrations.



Triethyl phosphate (TEP)

Triethyl phosphate(Flame retardants TEP) is mainly used as the high boiling point solvents,catalysts, plasticizers, flame retardants, ethylating agent, and organic peroxide stabilizer. And Triethyl phosphate(TEP) is widely used in medicine, pesticides, vinyl ketone, resins, hydraulic oil and other production areas. In Japan, 70% of this product is used in catalyst.


The word on fire experiment is out of 20% concentration of flame retardant "fire" two words (test to show that when the spraying position, flame retardant in BL2 mixed with red dyes) in green flame retardant, flame retardant dry, after staff at 4th level wind environment from the windward side of the light of weeds, fire to spray flame retardants have gradually faded, can also be seen well after the test with flame retardant spray into the word "fire" preserved, while not spray flame retardants of weeds around completely ashes, its flame retardant effect is remarkable.

In combustible material after adding flame retardant, flame retardant glass formed under high temperature or stable foam layer, with insulation, oxygen, prevent flammable gas to escape, the effect of flame retardant. Such as organic phosphorus flame retardants, when heated to produce structure more stable crosslinking of solid matter or carbonized layer, carbonized layer can prevent the polymer pyrolysis further, also can prevent the internal thermal decomposition products into gas phase in the combustion process.

According to the burning chain reaction theory, the combustion is maintained by free radicals. The flame retardant is used to capture the free radicals in the combustion reaction in the gas phase combustion zone to prevent the propagation of the flame, so that the flame density of the combustion zone decreases, and eventually the combustion reaction speed drops to the end. Such as evaporation temperature and polymer containing halogen flame retardant decomposition temperature of the same or similar, when polymer thermal decomposition, flame retardant also comes out at the same time, this time containing halogen flame retardant and thermal decomposition product at the same time in the gas phase combustion zone, halogen can capture the combustion reaction of free radical, prevent the spread of flame, make the flame burning area density decreased, eventually make the combustion reaction speed down until the end.

Flame retardant, decomposition of non-combustible gases, when heated to fuel decomposition of combustible gas concentration diluted to combustion under the floor, and dilute the oxygen concentration in the combustion, prevent burning continued, achieve the goal of flame retardant.

The flame retardant has good development prospect. Development trend: halogen flame retardant will continue to be used, but the product structure will be adjusted, but as people pay more attention to environmental protection, halogen-free flame retardant will become an inevitable trend. The expansion type flame retardant will be further developed. Non-toxic and smokeless non-halogen inorganic flame retardants, such as modified hydroxide, magnesium hydroxide, zinc borate, etc., especially the modified magnesium hydroxide, which can be used for higher temperature, will be further developed.

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