A kind of intumescent flame retardant and its preparation method and application

Abstract

The invention discloses an intumescent flame retardant and a preparation method and application thereof. The intumescent flame retardant is prepared from the following raw materials in parts by weight: 4-6 parts of modified ammonium polyphosphate, 3-4 parts of hyperbranched polyester, 0-1 part of polyvinyl alcohol and 45-50 parts of absolute ethanol. The hyperbranched polyester in the intumescentflame retardant serves as a char forming agent and also a film forming agent. The invention provides the application of the intumescent flame retardant in engineering plastics, and during application,the surface of the engineering plastics is treated by magnetron sputtering, surface energy can be improved without the need of complicated surface wetting agents or chemical deposition treatment, theintumescent flame retardant is easy to coat and the adhesive force reaches grade 5B. The hyperbranched polyester in the fire retardant has excellent char forming property, improves the adhesion firmness of the coating and also achieves excellent flame retardant effects; and the limit oxygen index LOI on polypropylene reaches 32% and reaches grade V0 in a UL-94 test, and the coating has excellentflexibility, can adapt to deformation of a matrix without falling and has wide applicable environments.

Description

technical field

[0001] The invention discloses an intumescent flame retardant, a preparation method and application thereof, and belongs to the technical field of flame retardant coatings. Background technique

[0002] With the development of society, the consumption of various engineering plastic products is increasing rapidly, and polymer materials can be seen everywhere in our lives. Among them, engineering plastics are extremely flammable, which can easily cause fire and cause loss of life and property. Therefore, it is of great significance to carry out flame-retardant treatment on engineering plastics to delay the spread of fire and reduce the loss of life and property. However, in the way of flame retardant engineering plastics, the traditional method is to add flame retardants to the matrix material by blending. If you want to achieve the ideal flame retardant performance, you need a large amount of addition, which is bound to The mechanical properties of engineeri...

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