Flame retardant containing DOPO groups and preparation method of flame retardant

Abstract

The invention relates to a flame retardant which contains DOPO groups and has gas phase and solid phase flame retardation effects and a preparation method of the flame retardant. The flame retardant is a novel flame retardant, can be added into a polymer material as an improved auxiliary agent, and belongs to the technical field of processing auxiliary agents. The flame retardant disclosed by the invention has high molecular weight and good thermal stability, is high in carbon residue rate after degradation, is stable in flame retardant efficiency, can be used for improving the flame retardant properties of the material by virtue of a gas phase and a solid phase, and can be used for improving the flame retardant properties of high molecular materials after the flame retardant is added into the high molecular materials; and the method disclosed by the invention is simple, adopts a one-pot process, and is high in efficiency.

Description

technical field [0001] The invention relates to a flame retardant containing DOPO group with gas-phase and solid-phase flame-retardant effects and a preparation method thereof. It is a new type of flame retardant, which is added to polymer materials as an improved auxiliary agent and belongs to processing Auxiliary technology field. Background technique [0002] At present, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is used as a new type of flame retardant intermediate, using 9,10-dihydro-9-oxa- The flame retardants synthesized from 10-phosphaphenanthrene-10-oxide (DOPO) and its derivatives have the advantages of being halogen-free and non-toxic. [0003] However, the molecular weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its derivatives is generally low, therefore, containing 9,10-dihydro-9-oxa The flame retardants of -10-phosphaphenanthrene-10-oxide (DOPO) or its derivatives generally have low molecular weight and poor compatibil...

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Problems solved by technology

[0003] However, the molecular weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its derivatives is generally low, therefore, containing 9,10-dihydro-9-oxa - The flame retardants of 10-phosphaphenanthrene-10-oxide (DOPO) or its derivatives generally have low molecular weight and poor compatibility with polymer materials, and such flame retardants are mainly flame retardant through the gas phase

In addition, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its derivatives have low degradation temperature and poor thermal stability, and are easily heated and melted during high-temperature processing. The polymer material containing the flame retardant is easy to be plasticized, resulting in the formation of molten droplets during the combustion of the polymer material, and the degraded 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10 - Oxide (DOPO) or its derivatives have low carbon residue, which reduces the flame retardant efficiency, so it cannot be used in high-temperature processing materials

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