Halogen-free high-efficiency flame retardant composition and preparation method thereof

Abstract

The invention discloses a halogen-free high-efficiency flame retardant composition and a preparation method thereof. The halogen-free high-efficiency flame retardant composition is prepared from the following components in percentage by mass: 10-80% of phenyl melamine carboxyethyl phenyl phosphinic acid condensation compound, 15-70% of melamine and / or derivative thereof and 5-20% of organic phosphate. The halogen-free flame retardant composition can be used for flame retarding of various polyolefin, nylon, polyurethane, polyester and other synthetic materials and textiles, and is particularly suitable for polyester and nylon engineering plastic; and by the addition of 12wt% of the flame retardant composition to polybutylene terephthalate (PBT) resin, the flame-retarding level can reach UL 94 V-0 (1.6 mm). The flame retardant composition has the characteristics of high flame retarding efficiency, good fluidity, no precipitation and the like, and can meet the use requirements of flame-retardant resin for electric appliance shells and supports, electronic and electric device connectors and the like.

Description

technical field [0001] The invention relates to a halogen-free high-efficiency flame retardant composition which can be used for various polyolefins, nylon, polyurethane, polyester and other synthetic materials and textiles for flame retardancy and its preparation method, in particular to a new type of benzomelamine carboxyethyl phenyl phosphinic acid condensate as the main flame retardant, a halogen-free high-efficiency flame retardant composition compounded with organic phosphate and melamine and / or its derivatives and its preparation method; the composition of the present invention is especially suitable A halogen-free high-efficiency flame retardant composition for flame-retardant modification of polyester and nylon engineering plastics. The halogen-free high-efficiency flame retardant composition of the present invention has high-efficiency flame retardancy, high fluidity, and no precipitation of the flame retardant. Features; at the same time, according to the needs of t...

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Problems solved by technology

However, the synthesis of the intermediate product pentaerythritol phosphate needs to react for 7 to 10 hours, the reaction time is too long, and the solvent is benzene, which has a great impact on the environment

[0004] Chinese patent CN101928448A describes a metal hypophosphite (including aluminum hypophosphite, magnesium hypophosphite, calcium hypophosphite, zinc hypophosphite) and nitrogen-containing flame retardants (including melamine polyphosphate, melamine cyanurate, honey melamine, melamine pyrophosphate) to compound the obtained flame retardant composition, and then blend it with polyester to obtain a preparation method of nanocomposite flame retardant reinforced polyester engineering plastics, this technology overcomes the modification of polyester reinforced materials The existing halogen-containing flame retardants have the disadvantages of high environmental hazards, high addition of inorganic flame retardants, and poor physical properties of materials; however, most of the flame retardant composition is metal inorganic salts, which are easy to precipitate, which has a negative impact on material processing performance and The mechanical properties of the final product have a great negative effect. This invention uses a modified nano additive to solve this problem, but the preparation process of this additive is complicated, industrial production is not easy to realize, and the practical application range is limited.

[0005] Chinese patent CN101280105A describes mixing a surface-treated hypophosphite with silane as a flame retardant, and modifying nylon 66 to obtain a high-performance halogen-free flame-retardant composite material. However, the flame retardant is in the preparation process It needs grinding and repeated high-temperature treatment, and the steps are complicated; and the fluidity of the composite flame retardant is not good, and the metal salt has a great influence on the physical and chemical properties of polyester and nylon products, making the overall performance of the material unsatisfactory

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