Molecular composite trimeric cyanamide cyanurate fire retarder and its preparation method and application

Abstract

The present invention relates to a molecular compounded trimeric cyanamide cyanurate fire-retarding agent, its preparation method and application. Its preparation includes the folloiwng steps: adding 10-300 portions of recombiner and 100-2000 portions of water in the reactor still with stirrer and thermometer, making them be completely dissolved at 50-130 deg.C, then successively adding 0-300 portions of fire-retarding synergist, 50-100 portions of trimeric cyanamide and 50-110 portions of cyanuric acid, stirring and reacting for 5 min-2 hr, at 50-150 deg.C, in the course of reaction can more adding 100-1000 portions of water so as to obtain the white emulsion or viscous paste-like material of molecular compounded trimeric cyanamide cyanurate.

Description

1. Technical field [0001] The invention relates to a molecular composite melamine cyanurate flame retardant and a preparation method thereof, belonging to the field of preparation of flame retardant polymer materials. 2. Background technology [0002] Melamine cyanurate (MCA) is a multifunctional fine chemical developed by Japan in the early 1980s. Its molecular structure is a triazine ring molecular complex composed of melamine and cyanuric acid through secondary bonds. Its appearance is slippery. Sensitive white crystalline powder, non-toxic, tasteless, insoluble in water and common organic solvents. It is stable below 300°C, and begins to sublimate at 400°C and decomposes into melamine and cyanuric acid at the same time. MCA has the characteristics of flame retardancy, lubrication and matting, and can be used in the fields of plastic flame retardancy, mechanical lubrication, paint matting, cosmetics and printing and dyeing. In recent years, with the development of the g...

AI Technical Summary

Problems solved by technology

However, because MCA is directly sublimated and decomposed by heating without melting process, MCA prepared by traditional methods is dispersed in the resin matrix in a rigid particle state during the process of melt blending with polymers, and its dispersion state has a great influence on the initial particle size of flame retardant particles. The size of the MCA flame retardant prepared by the traditional method is large in the resin, and the dispersion is uneven, which seriously affects its flame retardant performance.

In addition, the flame retardant efficiency of the currently commercialized MCA to reinforced or filled polymers, especially to reinforced or filled polyamides is very low, which limits its application range, so it is often improved by introducing a certain amount of flame retardant synergist. Flame retardant properties

U.S. Patent 4786673 introduces a method for preparing a flame-retardant polyamide by simply mixing the synthesized MCA and compounding agent into a flame retardant system. However, because this method is only a simple physical mixture of MCA and compounding agent, the product is easy to stick Sticky to the mold, the surface is prone to frosting, and the flame retardant synergistic effect after adding the compound agent is not significant