Study on the Properties of Different Resin Coated Red Phosphorus Flame Retardant Enhanced PA66

Nylon 66 (PA66) has the advantages of good mechanical properties, abrasion resistance and chemical corrosion resistance, and is widely used in automobiles, electronic appliances and other fiel.

Flame retardant nylon parts for new energy vehicles

At present, red phosphorus flame retardants can be used in flame retardant PA66 materials due to their high flame retardant efficiency and excellent cost performan.

BASF's new red phosphorus flame retardant nylon

In order to prevent the acidification reaction of red phosphorus and improve the stability of red phosphorus, the most effective method at present is to coat red phosphorus with microcapsul.

Coated red phosphorus

Different coating resins have different effects on red phosphorus flame retardant reinforced nyl.

The basic composition of the material is as follows: melamine resin coated red phosphorus flame retardant masterbatch (MC450), phenolic resin coated red phosphorus flame retardant masterbatch (PF450): red phosphorus content 5

Coated Red Phosphorus Flame Retardant Enhanced PA66 Formula Table

After blending and modification, a composite material of PA66/GF30 coated with red phosphorus flame retardant was prepared, and the relevant properties were measured as follo.

Flame retardant properties, glow wire temperature and relative tracking index

Flame retardant properties, glow wire temperature and relative tracking index of two types of coated red phosphorus flame retardant enhanced PA66

It can be seen that both PA66-1# and PA66-2# can reach the flame retardant grade of 6 mm V-0, and the materials do not drip during combusti.

It can also be seen that the CTI of PA66-1 is slightly higher than that of #PA66-2#, and the CTI of the two red phosphorus-coated flame retardant PA66 materials is above 450V, which can meet the application requirements of most industri.

Mechanical properties

Mechanical properties are important basic properties for the application of flame retardant reinforced nyl.

Mechanical properties of two kinds of coated red phosphorus flame retardant enhanced PA66

It can be seen that the tensile strength and bending strength of PA66-1# are higher, which are 164 MPa and 256 MPa respectively, which are 5% and 6% higher than that of PA66-2#, respective.

Appearance and smell

Two injection molding samples of red phosphorus flame retardant reinforced PA66

From the appearance of the two injection-molded samples coated with red phosphorus flame retardant reinforced PA66, it can be seen that the flame retardant reinforced PA66 (PA66-1#) sample prepared by coating red phosphorus with melamine resin has a smooth surface, bright colors, and no floating fibers on the surfa.

After two kinds of red phosphorus-coated flame retardant reinforced PA66 pellets were placed at 80°C for 2 hours, the odor was measur.

Water absorption

Because PA66 contains amine groups and carbonyl groups, it is easy to form hydrogen bonds with water molecules, so it is easy to absorb water during use, resulting in a plasticizing effect, resulting in material volume expansion, decreased rigidity, and obvious creep under stre.

Variation of water absorption with time of two red phosphorus-coated flame retardant reinforced PA66 materials

By testing the water absorption rate of the material to study the effect of different coating flame retardant red phosphorus on the water absorption rate of the material, it can be seen that the water absorption rate of the two materials increases with the increase of ti.

Corrosion to metal

The metal sheet and the red phosphorus flame-retardant reinforced nylon material were placed together in a high temperature and high humidity environment, and the corrosion of the metal sheet was observed after 240 hou.

Metal corrosion diagram of blank sample and adding different coating red phosphorus flame retardant enhanced PA66

It can be seen from the metal corrosion diagrams of the blank sample and the flame-retardant reinforced nylon material with different coatings of red phosphorus that the blank sample without modified nylon has less corrosion on the metal surface, and there are slight corrosion marks caused by air and water vap.

In summary, two flame retardant reinforced PA66 materials were prepared by coating red phosphorus with melamine resin and phenolic res.

Both materials prepared by coating red phosphorus can reach the flame retardant level of 6 mmV-0, and can pass the 775 ℃ glow wi.

Light-off temperature, CTI can also reach above 45

The melamine-coated red phosphorus flame retardant enhances the tensile strength and flexural strength of the PA66 material, while the phenolic-coated red phosphorus flame retardant PA66 material has better impact performan.

In addition, the odor of the phenolic resin-coated red phosphorus flame retardant enhanced PA66 is less than that of the melamine-coated material, and the water absorption rate is also low.

Melamine resin coated red phosphorus flame retardant enhanced PA66 has better appearance and less corrosiveness to met.

Reference material: Research on the properties of PA66 coated with red phosphorus flame retardant enhancement, Internet informati.