Composite foaming agent for soft PVC foam material

Abstract

The invention discloses a composite foaming agent for soft PVC foam material. The foaming agent comprises the following raw materials, by weight: 4-6 parts of azobisformamide, 1-3 parts of N,N'-dinitrosopentamethylene tetraamine, 1-2 parts of cetyl trimethyl ammonium bromide, 2-3 parts of sodium bicarbonate, 2-3 parts of sodium citrate, 1-2 parts of zinc carbonate, 0.5-1.5 parts of chromium sulfate, 0.5-0.8 part of lead stearate, 2-4 parts of glycerine, and 10-15 parts of poly propylene glycol. Compound of azoformamide, N, N'-dinitrosopentamethylene tetraamine, cetyl trimethyl ammonium bromide and other raw materials improves defects of single azoformamide, such as strong heat release, strong burstiness and rapid dissociation. The composite foaming agent provided by the invention gently decomposes and releases less heat when heated; and the obtained material has uniform and fine pores, improved performance, and especially increased tear strength and elongation at break.

Description

technical field [0001] The invention relates to a foaming agent, in particular to a composite foaming agent for soft PVC foaming materials. Background technique [0002] Polyvinyl chloride (PVC) is the thermoplastic material with the longest history in plastics. Soft PVC foam material is a relatively new type of material that has developed rapidly in recent years. It is mainly used in shoe sole materials. It has excellent physical properties, lightness and comfort, It has the advantages of convenient processing and low cost. The chemical foaming agent azodimethamide is the main foaming agent for soft PVC foaming materials. A single azodimethamide (AC) has defects such as strong heat release, strong suddenness, and fast decomposition. In use, it must be compounded and modified to develop a compound foaming agent that decomposes slowly when heated, releases less heat, obtains excellent mechanical properties of the material, and has uniform and fine cells. Contents of the in...

AI Technical Summary

Problems solved by technology

The chemical foaming agent azodimethamide is the main foaming agent for soft PVC foaming materials. A single azodimethamide (AC) has defects such as strong heat release, strong suddenness, and fast decomposition. In use, it must be compounded and modified to develop a compound foaming agent that decomposes slowly when heated, releases less heat, obtains excellent mechanical properties of the material, and has uniform and fine cells.

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