Preparation method for magnesium halogen-free flame retardant and application of magnesium halogen-free flame retardant to flame-retardant high-temperature-resistant tape

Abstract

The invention belongs to the field of composite flame retardant processing. The invention is characterized in that a magnesium halogen-free flame retardant comprises the following components in percentage by weight: 50-80% of ore type magnesium hydroxide, 1-5% of a surface modifier, 10-30% of a flame retardant synergist, 2-5% of a processing additive and 0-10% of a plasticizer. A preparation process for the magnesium halogen-free flame retardant comprises the steps as follows: adding the weighed surface modifier and magnesium hydroxide into a reactor, controlling the temperature to be 60-110 DEG D, uniformly mixing, adding the raw materials according to the weight ratio, and stirring by a high-speed stirrer to prepare the magnesium halogen-free flame retardant; and 2, diluting the weighed surface modifier through 20-50 parts of ethanol or acetone as a solvent, mixing with magnesium hydroxide in a low-speed kneading machine, heating, adding the raw materials according to the weight ratio, and stirring at a high speed to prepare the magnesium halogen-free flame retardant. The magnesium halogen-free flame retardant is strong in environment-friendly flame-retardant performance, cheap in the raw materials, low in production cost and better in economic and social benefits.

Description

technical field [0001] The invention belongs to the field of composite flame retardant processing, and in particular relates to a preparation method of a magnesium-based halogen-free flame retardant and its application in flame-retardant and high-temperature-resistant adhesive tapes, which are used for the preparation of high-temperature-resistant adhesive tapes below T4 level. Background technique [0002] High temperature resistant conveyor belts are mainly used in metallurgy, building materials, chemical industry and other industries to transport sintered ore, pelletized ore, cement clinker, lime, coke, fertilizer and other high temperature materials. In recent years, judging from the casualties after fires in coal mines, most of the victims died of suffocation due to inhalation of smoke and toxic gases generated during combustion. Conveyor belts are an urgent need for safe production in coal mines. [0003] [0003] At present, the most commonly used flame retardants for...

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Problems solved by technology

[0003] [0003] At present, the most commonly used flame retardants for high temperature resistant conveyor belts are mainly organic phosphorus, bromine, chlorine, and antimony compounds. Organic phosphorus flame retardants are expensive, and halogen flame retardants generate a lot of smoke and are toxic and corrosive when burned The disadvantages such as strong gas, and severe molten droplets during combustion severely restrict the development of flame retardants in the field of high-temperature conveyor belts.