Preparation method of flame-retardant composite through dynamic vulcanization

Abstract

A method for preparing a dynamically vulcanized flame-retardant composite material. Belonging to the field of material preparation, including the following steps: (1) combining PP, EPDM and Mg(OH) 2 Vacuum drying was carried out separately; (2) The mixture of PP and EPDM was added to the torque rheometer and mixed until the torque was balanced, and finally the flame retardant was added and mixed until the torque was balanced. The halogen-free flame-retardant dynamic vulcanized blend; (3 ) The halogen-free flame-retardant dynamic vulcanization blend is put into a molding machine and cold-pressed under pressure to complete the preparation. By using dynamic vulcanization technology, the flame retardant properties of composite materials can be rapidly improved, and the mechanical properties are also better than those of simple blended composite materials. Appropriate surface modification of this magnesium hydroxide can meet the flame retardant properties and limit the experimental resources. Recycle and reduce costs.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method of a dynamically vulcanized flame-retardant composite material. Background technique [0002] Although magnesium hydroxide is a green and environment-friendly flame retardant, the flame retardant efficiency of magnesium hydroxide is low. Generally, it needs to be added by 60% to achieve a certain flame retardant effect, but at this time it will seriously affect the mechanical properties of the composite material. Therefore, a synergist is usually used to synergize with magnesium hydroxide to synergize the flame retardant polymer. At present, the commonly used synergists generally include aluminum hydroxide, Sb2O3, microencapsulated red phosphorus, zinc borate, nanoclay, and platinum catalysts. [0003] Dynamic vulcanization is to melt and blend rubber with non-vulcanizable thermoplastic polymers such as PP, PVC, PA, etc. in a high-temperature ...

AI Technical Summary

Problems solved by technology

At present, most of the research on dynamic vulcanization mainly studies the mechanical properties, processing properties and electrical conductivity of dynamic vulcanized composite materials, and few people study the flame retardancy of dynamically vulcanized thermoplastic elastomers.