Preparation method of antibacterial type soft polyurethane foaming plastic

Abstract

The invention discloses a preparation method of an antibacterial type soft polyurethane foaming plastic. The preparation method is characterized by comprising the following technical steps: a, adding metered polyether glycol N330 and 1,4-butanediol, a catalytic amount of dibutyltin dilaurate and tripolycyanamide to a reaction kettle, filling nitrogen or an inert gas into the reaction kettle for protection, heating at 40-60 DEG C, sufficiently stirring for 6-8 hours, and reducing temperature to 25 DEG C; b, adding polyisocyanate, silicone oil, triethylamine, nanometer zinc oxide and a right amount of water to a product obtained from the step a, and stirring at high speed till foaming; c, when a large quantity of white foams appear, immediately injecting the white foams into a mould, aging at 40-60 DEG C for 60-150 minutes, and demoulding to obtain a soft polyurethane foaming plastic product. The obtained polyurethane soft foaming plastic has the advantages of good antibacterial and bactericidal property, stability in heat-resistant property, no bactericide separation, safety, environment protection, simpleness and convenience for production process and suitability for industrialized production.

Description

technical field [0001] The invention belongs to the field of polyurethane foam plastics, in particular to a preparation method of antibacterial flexible polyurethane foam plastics. Background technique [0002] Flexible polyurethane foam (abbreviated as soft polyurethane foam) refers to a type of flexible polyurethane foam with certain elasticity, and it is the most widely used polyurethane product. The cell structure of polyurethane flexible foam is mostly open. Generally, it has low density, good elastic recovery, sound absorption, breathability, heat preservation and other properties. It is mainly used as furniture cushion material, vehicle seat cushion material, and various soft cushion laminated composite materials. Soft foam is also used in industry and civil use. Used as filter material, sound insulation material, shockproof material, decoration material, packaging material and heat insulation material, etc. Because polyurethane materials contain nutrients necessary...

AI Technical Summary

Problems solved by technology

Among the inorganic antibacterial agents, silver-based antibacterial agents have better antibacterial effects, which have the advantage of high heat resistance, but are expensive, relatively large in dosage, and easy to change color; synthetic organic antibacterial agents have quick effects and excellent anti-mold effects, etc. However, it has the characteristics of poor heat resistance, short duration of drug effect, easy precipitation, and low safety.