Poly-phosphate flame retardant containing DOPO side-chain structure and preparation method thereof

Abstract

The invention discloses a poly-phosphate flame retardant containing a DOPO side-chain structure and a preparation method thereof, belonging to the technical field of polymeric organic phosphorus flame retardant structures and the preparation method thereof. The flame retardant is characterized by comprising the following repeating unit structure: wherein n=5-50. The preparation method of the poly-phosphate flame retardant comprises the following steps of: reacting an intermediate I containing the DOPO structure with phosphorus oxychloride to obtain an intermediate II containing phosphorus oxychloride, and fusing and polymerizing the intermediate II and a bisphenol compound to obtain the poly-phosphate flame retardant containing the DOPO side-chain structure. The preparation method is simple, and through adjusting Ar categories and ratios, the phosphorus content can be controlled at 11.5-15.5% and the sulfur content can be controlled at 0-5.9%. The flame retardant has the characteristics of favorable thermal stability, high decomposition temperature, favorable char-forming property, and the like, and can be used for flame retardance modification of materials, such as polyester, polyamide, polycarbonate and blends thereof, and the like, with higher processing temperature.

Description

technical field The invention belongs to the technical field of polymeric organophosphorus flame retardant structures and preparation methods thereof, and relates to polyphosphate ester flame retardant structures containing DOPO side chain structures and preparation methods thereof. Background technique With the rapid development of synthetic materials, synthetic plastics, rubber, and fibers are more and more used in various sectors of the national economy and people's production and life, but at the same time, fires caused by ignition of high polymers are also Therefore, people have higher and higher requirements for the flame retardant properties of synthetic materials. Especially in the high-tech field, people not only require flame-retardant materials to have satisfactory flame-retardant properties, but also require materials to have good physical and mechanical properties and electrical properties, processing fluidity, easy recycling of flame-retardant materials, dimens...

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Problems solved by technology

However, the experimental results show that the use of flame retardants containing DOPO structures alone has poor droplet resistance

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