Preparation method of deposition-coated composite flame retardant and application of deposition-coated composite flame retardant to flame-retardant modification of PET

Abstract

The invention provides a deposition-coated composite flame retardant and a preparation method thereof, and polyester flame-retardant modified by the flame retardant, the deposition-coated composite flame retardant comprises a matrix and a coating layer coated on the surface of the matrix, the matrix comprises one or more of ammonium polyphosphate and a DOPO-based flame retardant; and the coating layer is thermosetting resin, preferably melamine resin. The coated composite flame retardant has good charring promoting performance and excellent comprehensive flame retardant effect, after the coated composite flame retardant is compounded with polyester, the flame retardant property, chemical stability and thermal stability of polyester are greatly improved, the coated composite flame retardant has good heat release and smoke release inhibition effects and excellent molten drop resistance, and the preparation method is simple, low in cost and wide in application prospect.

Description

technical field [0001] The invention relates to the field of flame retardant technology, in particular to the preparation of a deposition-coated composite flame retardant and the research on flame retardant modification of PET. Background technique [0002] Polymer materials are widely used in daily life due to their excellent properties such as light weight and easy processing. However, most polymers are extremely flammable, and the combustion process is often accompanied by the generation of smoke, toxic or corrosive gases. It has caused great limitations to practical applications. Therefore, improving the flame retardancy of polymers has become an important task in the application research of polymers. [0003] PET is an important commercial polyester with rapid development. The performance of PET fibers, films, engineering plastics and other products is also at a critical stage of further improvement. Most PET products are used in the textile field, automobile industry, ...

AI Technical Summary

Problems solved by technology

[0005] When the intumescent flame retardant is used as a flame retardant modifier of a high polymer, after thermal decomposition, it itself or promotes the high polymer to quickly form a uniform carbon foam layer, which has functions such as heat insulation, oxygen insulation, and smoke suppression. And it can prevent the generation of molten droplets, improve the thermal stability and flame retardant performance of polymers and their composite materials, delay the burning process of materials, and the price is low. It has become one of the most promising flame retardant systems at present, but if it is combined with If it is directly applied to polymer materials, the performance of the material will be greatly reduced due to the compatibility and water absorption between the two.

[0006] Ammonium polyphosphate is a commonly used main component of intumescent flame retardants. It has the advantages of non-toxic, tasteless, and no corrosive gas. After the polymer is neutralized, its mechanical properties are greatly affected, and it is limited to further improve the flame retardancy and mechanical properties of high polymers and composite materials.

At the same time, the intumescent flame retardant still has the disadvantages of chemical stability, thermal stability and poor compatibility with the matrix polymer.

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