Synthesis and application of novel triazine-derivative fire retardant

Abstract

The invention discloses synthesis of a novel triazine-derivative fire retardant (NPFR) based on triazine hexa-heterocycle and phosphaphenanthrene structure and application of the fire retardant in production of cotton textiles. The chemical structure of the fire retardant is as shown as tri-[4-(4-hydroxyaniline-phosphaphenanthrene)methylene-phenoxy]-1.3.5-triazine, called NPFR for short. A preparation method of the fire retardant includes: subjecting tricyanogen chloride (TCT) and parahydroxyben-zaldehyde to reaction to obtain 2,4,6-tri(4-formylphenoxyl)-1,3,5-triazine (ZJT); subjecting ZJT, p-aminophenol and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) to obtain the NPFR. Since triazine hexa-heterocycle (namely the N-source ) with excellent thermal stability is taken as the core and DOPO group (namely the P-source) with excellent flame retardancy is introduced, the thermal stability of flame retardant molecules is improved, while flame retardancy is improved under N-P synergistic action. The novel triazine-derivative fire retardant (NPFR) has high maximum oxygen index and excellent carbonization rate when applied to the field of flame resistance of cotton textiles.

Description

technical field [0001] The present invention relates to the technical field of preparation of flame retardant materials, in particular to the preparation of a class of novel triazine derivative flame retardant materials based on cyanuric chloride and DOPO structures and their application in various types of flame retardant substrates, especially Application in cotton textiles. Background technique [0002] With the widespread use of polymers, fire safety is a growing concern. Many safety testing organizations, including Underwriters Laboratories (UL), the International Organization for Standardization (ISO), and the American Society for Testing and Materials (ASTM), have published various standard standards that define the required resistance of polymers in a given classification. flammability. [0003] Most commodity textiles are too flammable. As one of the most commonly used textile raw materials, cotton fiber has a limiting oxygen index of only 18%, which is extremely ...

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Problems solved by technology

At present, the flame retardant materials used in textiles mainly include ① organic halogen flame retardant system, ② nitrogen based flame retardant system, ③ phosphorous based flame retardant system, ④ silicon based flame retardant system, etc. Among them, although organic halogen flame retardant materials have excellent flame retardant properties, The amount of addition is small, but when it burns, it will produce a large amount of toxic, harmful and strong irritating gas, causing direct, potential and long-term harm to human health and the environment, thus making the research and development of halogen-free flame-retardant materials an inevitable trend; The main advantages of nitrogen-based, phosphorus-based, and silicon-based flame retardant materials are low toxicity, low smoke, and low corrosion. However, due to the large amount of addition required, the mechanical properties of the material are often affected, so their application is also limited. With the development of social economy, health and environmental protection issues have increasingly become the focus of people's attention, and the green development strategy has become an important national development strategy. As a rising star in modern flame retardants, P-N flame retardants have overcome the traditional The disadvantages of decomposing and releasing toxic gases, combined with the advantages of phosphorus-based flame retardants and nitrogen-based flame retardants, have become a hot spot for current scholars.

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