Foaming agent for PVC foamed plastic

Abstract

The invention discloses a foaming agent for PVC foamed plastic. The foaming agent consists of the following raw materials by weight: 8-12 parts of azoformamide potassium formate, 4-6 parts of p-toluenesulfonyl semicarbazide, 2-5 parts of p-(N-methoxy formamido) benzene sulfonyl hydrazide, 1-2 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 2-4 parts of ammonium carbonate, 2-3 parts of ethanolamine, 1-3 parts of urea, 0.5-0.8 part of lead stearate, 3-6 parts of benzoic acid, 2-4 parts of calcium oxide and 15-20 parts of propylene glycol. The foaming agent for PVC foamed plastic provided by the invention has decomposition temperature in the molding processing range of rigid PVC foam material, basically balanced heat absorption, smooth decomposition rate, large amount of gas release and no burstiness. The foamed plastic prepared from the composite foaming agent has good mechanical property, uniform and fine bubble hole, thin hole wall, easily controllable processing conditions, and no occurrence of burning and charring.

Description

technical field [0001] The invention relates to a foaming agent, in particular to a foaming agent for PVC foam plastics. Background technique [0002] PVC foam is made of polyvinyl chloride resin as the main body, adding foaming agent and other additives. It is an earlier foam. It has good mechanical properties and impact absorption; it is a closed-cell soft foam; its density is 0.05-0.1g / cm 3 Between; stable chemical properties, strong corrosion resistance; non-absorbent, non-flammable, cheap. It can be made into packaging containers such as boxes and boxes, as well as liners and liners. The blowing agent is the most important additive in PVC foam plastics. The type and quantity of the blowing agent have a direct impact on the physical and mechanical properties, foam density, and temperature resistance of the foam. At present, the foaming agent used in PVC foam has problems such as low expansion ratio and poor stability, which directly affect the performance of plastic p...

AI Technical Summary

Problems solved by technology

At present, the foaming agent used in PVC foam has problems such as low foaming ratio and poor stability, which directly affects the performance of plastic products, resulting in low product strength, unstable quality, and low overall technical quality.

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