Environment-friendly permanent polyolefin flame-retardant cable material and preparation method thereof

Abstract

The invention discloses an environment-friendly permanent polyolefin flame-retardant cable material and a preparation method thereof. The cable material is prepared from the following raw materials inparts by weight: 100 parts of resin, 2-5 parts of unsaturated carboxylic acid, 0.2-1.0 part of an initiator, 0.5-1.2 parts of an antioxidant and x parts of a reactive phosphorus flame retardant, wherein x=m1 / M1*M2*n; m1 is the mass of unsaturated carboxylic acid, M1 is the molecular weight of unsaturated carboxylic acid, M2 is the quantity of the reactive phosphorus flame retardant, and n is thenumber of functional groups of unsaturated carboxylic acid. A phosphorus flame retardant DOPO is introduced into the polyolefin molecular side chain, flame retardant efficiency is high while the addition quantity is small, the permanent flame retardant effect is achieved without influence on performance of polyolefin, and the environment-friendly permanent polyolefin flame retardant cable materialis obtained.

Description

technical field [0001] The invention relates to a polyolefin flame-retardant cable material and a preparation method thereof. Background technique [0002] Polyolefin resin has good mechanical properties, insulation, low temperature resistance and processability, and is widely used in the field of wire and cable. However, its own low oxygen index (LOI=18%) is extremely flammable, thus greatly limiting its application range. [0003] Polyolefin flame retardant cable materials mainly use inorganic powder flame retardants aluminum hydroxide (ATH) and magnesium hydroxide (MH) to improve the flame retardant effect, but due to the low flame retardant efficiency of inorganic powder, it is necessary to achieve the ideal flame retardant effect The addition of inorganic flame retardants should reach more than 55%, which seriously causes a sharp decline in the performance of the material itself, and cannot be used in occasions with high mechanical performance requirements. Organophos...

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Problems solved by technology

[0004] At present, in order to reduce the amount of flame retardant added to polyolefins and prepare environmentally friendly flame-retardant polyolefins, blended phosphorus-based flame retardants are often added. There are many types of blended phosphorus-based flame retardants, but their water resistance is poor, especially for hot water. It is easy to separate out, such as the application publication number CN105623072A patent introduces a thermoplastic polyolefin cable material and its preparation method. Polyphosphoric acid is used to prepare flame-retardant polyolefin cable material products, but a large number of studies have shown that moisture absorption and precipitation are easy to occur. In order to To achieve good water resistance, it is necessary to coat the flame retardant, but the process is complicated, which is not conducive to industrial production

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