A kind of silicon-containing reactive flame-retardant nylon resin and preparation method thereof

Abstract

Silicon-containing reactive flame retardant nylon resin and a preparation method thereof are disclosed. The preparation method comprises the following steps: a phosphorus-containing reactive flame retardant with two end carboxyl groups is mixed with amino silicone oil to obtain a mixture; the obtained mixture, a nylon monomer and a catalyst are mixed in a certain ratio into a material, and after polymerization reaction of the material, the silicon-containing reactive flame retardant nylon resin can be obtained. The silicon-containing reactive flame retardant nylon resin has permanent flame retardant property, the flame retardant grade reaches to UL94V-0, the oxygen index is 25-45, and the product has the advantages of good mechanical properties, high oxygen index, high flame retardant grade and better adaptability, and the like.

Description

technical field [0001] The invention relates to a flame-retardant nylon resin and a preparation method thereof, in particular to a silicon-containing flame-retardant nylon resin and a preparation method thereof. Background technique [0002] With its excellent mechanical properties, friction resistance, heat resistance, electrical insulation and weather resistance, nylon is widely used in textile fibers, automobiles, electronic appliances, construction machinery and other fields. Compared with general polyolefins, nylon has low melt strength and drips during combustion, which increases the risk of fire transmission and endangers the safety of human production and life. The flame retardant advantage of nylon is that its molecules contain heteroatoms such as nitrogen and oxygen, and its combustion calorific value and flammability are lower than those of polyolefins, and the presence of heteroatoms reacts strongly with phosphorus and silicon-based flame retardants. Can play th...

AI Technical Summary

Problems solved by technology

However, at present, such patents use phosphorus-based flame retardants, and some even use monofunctional flame retardants, which makes the polymerization easy to be blocked and affects its mechanical properties.

[0005] In addition, some of the existing flame-retardant nylon resins are generally prepared by extrusion blending and modification. Such flame-retardant nylon resins have problems such as high flame retardant content and low flame-retardant efficiency, resulting in low mechanical properties of nylon resins. poor liquidity

Some reactive flame-retardant nylon resins are basically dripping flame-retardant, and there will be dripping when burning, which seriously affects the application range of the material.

Some reactive flame retardants have poor high temperature resistance, and nylon polymerization temperature is high, and the reactive flame retardants are easy to decompose during polymerization.

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