Preparation method of isocyanate and negative ion mineral powder compound

Abstract

The invention provides a preparation method of an isocyanate and negative ion mineral powder compound. The method comprises specific steps as follows: 10 parts of negative ion mineral powder by weight are added to 10-100 parts of a ketone solvent, the mixture is stirred at the speed of 50-150 r / min for 10-60 min, then 3-30 parts of polyisocyanate are added at the flowing speed of 1-10 g / min, the mixture reacts at the temperature of 50-200 DEG C for 1-5 h, the ketone solvent is recovered through reduced-pressure distillation, the isocyanate and negative ion mineral powder compound is obtained and can directly participate in a synthesis reaction with a polymer, and the negative ion mineral powder can be effectively bonded to a molecular chain of the polymer. The isocyanate and negative ion mineral powder compound has the reaction activity of the isocyanate and can participate in the synthesis reaction with the polymer to enable the negative ion mineral powder to be organically bonded to the molecular chain of the polymer, and the phenomenon of non-uniform dispersion of negative ions caused by conventional adding methods is eliminated.

Description

technical field [0001] The invention belongs to the field of material composites, and in particular relates to a preparation method of a composite of isocyanate and negative ion mineral powder. Background technique [0002] Negative ion mineral powder has obvious piezoelectricity and pyroelectricity. Changes in the surrounding environmental conditions will cause the mineral powder to generate a potential difference to stimulate negative ions. Negative ions can regulate and improve the human body. They are known as vitamins in the air. Based on the advantages of negative ions, people are constantly developing various functional materials that can release negative ions, and more and more attention has been paid to negative ion materials that are beneficial to health. For example, the patent CN200710301007 discloses "Polyurethane Composite Material Releases Negative Ions and Its Preparation Technology". Anion series negative ion additives are added to the polymer to develop a m...

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Problems solved by technology

However, this preparation method leads to the intermolecular interaction between the anion mineral powder and the polymer, rather than the organic integration of the anion mineral powder into the molecular chain of the polymer. The polymer will be detached, causing the negative ion release function of the material to decay over time; at the same time, there is also the phenomenon of uneven dispersion of negative ions