Common environmental protection types of flame retardants

Environmentally friendly flame retardant is a kind of flame retardant, nearly 80% for the current domestic plastics modified with fire retardant containing halogen flame retardants, among them with pbdes and polybrominated biphenyl type material represented, bromine flame retardants of high efficiency, less consumption, small influence on the performance of the material, and the price is moderate. Below I give everybody introduction by a specific common environmentally friendly flame retardant.

A, environmental protection, bromine flame retardants

1, 10 bromine diphenyl oxide

It has the characteristics of light fastness and difficult to dialysis, and the more valuable is its flame retardant plastic can be recycled to use, this is that many do not have the characteristics of bromine flame retardants. Its industrial products for the average particle size 3 microns, free flow, micro granular white crystalline powder, easily dispersed in the plastic modification, plastic color of freedom.

2, brominated epoxy resin

Flame retardant with brominated epoxy resin is also known as tetrabromobisphenol A epoxy oligomer, bromine content can reach 50%. Brominated epoxy resin has satisfying the melt flow rate and high flame retardant efficiency, excellent thermal stability and light stability, and can give good flame retardant base material mechanical properties, the product can't afford to cream.

3, brominated polystyrene

Brominated polystyrene is similar to that with the development of brominated epoxy resin, is developing rapidly in recent years, a varieties of flame retardant. Brominated polystyrene is white or light yellow powder or granule, bromine content of about 60%. Thermal decomposition temperature greater than 310 ℃, with large molecular weight, good thermal stability, good dispersion and mixing in the high polymer capacitive, easy processing, no cream, etc.

Second, phosphorus-containing flame retardants

1, red phosphorus masterbatch

In the non halogen flame retardant, red phosphorus is a kind of good flame retardant, has the advantages of adding quantity is little, wide range of USES. Ordinary red phosphorus is easy absorption of moisture, poor compatibility with polymer materials, especially easy to cause spontaneous combustion, not the actual use. Red phosphorus flame retardants, microcapsules decreased the activity of the red phosphorus, solved the compatibility, red phosphorus content is around 85%, but the solution of the problem has not been effective spontaneous combustion, dust pollution is serious.

2, resorcinol, a double (diphenyl phosphate)

Resorcinol a double (diphenyl phosphate) is a high molecular weight organic phosphonic flame retardants, apparent as the clear liquid; Its high phosphorus content, phosphorus content is 10.8%. High flame retardancy, low amount, the characteristics of small influence on product property. It has a flame retardant and plasticizing double function, can make no halogenated flame retardants fully implemented, to improve the flow of plastic molding processing performance and reduce the ablation, improve the heat aging resistance, improve the heat distortion temperature, and can inhibit the residue after burning.

Three, nitrogen flame retardants

Nitrogen flame retardant of melamine and phosphorus compounds, mainly is the melamine, melamine cyanuric acid and melamine phosphate, is flame retardant market has the development potential of varieties. Nitrogen flame retarding agent is commonly Bai Sejing fine powder, particle size of 10 microns ~ 50 microns, easy to spread. Density of 37.5 px ~ 1.7 g/cm. As flame retardants, nitrogen flame retarding agent has many advantages: efficient flame retardant; Do not contain halogen; Non-corrosive effect, and thus reduce the machinery by corrosion problems; Ultraviolet light; Good performance, more obvious advantages in electrical and electronic products; Do not fade, not bloom; Can be reused.

Fourth, inorganic flame retardants
Inorganic flame retardant is given priority to with aluminium hydroxide and magnesium hydroxide. Aluminium hydroxide and magnesium hydroxide is white powder, relative density at around 2.4, the particle size of 1 ~ 20 microns. Aluminum hydroxide to dehydration temperature 200 ℃, magnesium hydroxide to dehydration temperature 340 ℃. Magnesium hydroxide, high thermal decomposition temperature is 140 ℃ higher than aluminum hydroxide, can add the synthesis of magnesium hydroxide material can withstand the higher processing temperature, extrusion speed, shorten the molding time, also helps to improve the flame retardant efficiency. Magnesium hydroxide fine particle size, the wear and tear of equipment, to extend the life of the processing equipment. Compared with magnesium hydroxide and aluminum hydroxide has many advantages, so the proportion of magnesium hydroxide is bigger and bigger. Compared with other inorganic flame retardant type magnesium hydroxide, a better smoke suppression effect. Magnesium hydroxide in the process of production, use and waste no harmful substances emissions, but also can neutralize acid and the corrosive gas generated in combustion process.
That is about several kinds of common environmental protection introduced the kinds of flame retardants, hope you can help to you.