Important inorganic flame retardants

Important inorganic flame retardants

Antimony oxide and its preparation methods of antimony oxide is one of the most important inorganic flame retardant, flame resistance when used alone is very small, but with a phosphorus-containing flame retardant and can greatly improve the efficiency of phosphorus-containing flame retardant, so it is indispensable in almost every phosphorus-containing flame retardant association agent.

Although no halogenated flame retardants in recent years is high, but because at that time to find the ideal substitutes, phosphorus-containing flame retardants will still has dominated field of flame retardants for quite a long time, so the antimony oxide still has certain development space, the current foreign for modification and processing, the United States, Britain, Switzerland and other countries have developed the antimony oxide flame retardant masterbatch, widely used in all kinds of plastic, synthetic fiber, textile and other fields.

But because of antimony oxide toxicity, so instead of research has been abroad, now can partly replace the help of antimony trioxide flame retardant zinc borate, zinc sulfide, zinc stannate, zirconium compound and molybdenum compound. Some foreign developed inorganic compounds containing tin, the bromine and chlorine flame retardants have good synergy, the flame retardant efficiency and antimony oxide, can completely replace the antimony oxide application in various fields, and low toxicity.

Antimony oxide is an important inorganic flame retardant. It is widely used in various fiber production and has excellent flame retardant properties. Due to strong permeability and strong adhesion force, the flame retardant fiber and fabric are durable and durable. The preparation methods of antimony oxide are mainly oxidized and chlorinated hydrolysis.

Inorganic phosphorus compound inorganic phosphor flame retardants mainly include red phosphorus, phosphate and ammonium polyphosphate. Red phosphorus flame retardant is a kind of excellent performance, with high efficiency, smoke suppression and flame retardant effect of low toxicity, easy absorption of moisture, oxidation, but in the actual application and emit poisonous gas, dust explosion, and dark red, therefore is limited to use. In order to solve the above problems, the surface treatment of red phosphorus is the main direction of red phosphorus as flame retardant.



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 microencapsulated red phosphorus is the most effective method for surface treatment.

Domestic research on red phosphorus package have done a lot of work, the general use of aluminum hydroxide, metal sulfate, synthetic resin as wall material, but has not been widely used in the domestic market, to speed up the product research and propaganda, in the future in the application research and to work with material compatibility issues.

Ammonium phosphate and ammonium polyphosphate and their corresponding expansive flame retardants have become active research fields in inorganic flame retardants. With long-chain ammonium polyphosphate (APP) as the foundation, the product P2N high flame retardant element content, good thermal stability, almost neutral products, can cooperate with other material, flame retardant performance persistence, thus developing very rapidly, in recent years, foreign countries launched numerous excellent APP.

Borate borate series products are also an important inorganic flame retardants, including ammonium borate, ammonium pentaborate, sodium borate, ammonium fluoroborate, barium borate, zinc borate. The main use is zinc borate products, zinc borate can obviously improve the fire resistance of products.

Because of the price is relatively high boric acid halogen flame retardant, limits its application, the application of FB borate fire retardant and synthesis are under development, as a result of FB borate fire retardant performance good, safe and non-toxic, low cost, easy raw material sources.

Of rubber products mainly used in high-rise building accessories, elevator, cable, wire, plastic sheath, temporary construction, military products, plastic, TV shell and parts, watercrafts coatings and synthetic fibre, etc., and has the irreplaceable advantages in some areas, so the development prospect is widely, and boron resources are rich in our country, the domestic has the resources area, can accelerate the boric acid salt, synthesis and development of flame retardants.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

http://www.yaruichem.com