Preparation method of all-water MDI foaming antibacterial polyurethane for shoe material

Abstract

The invention relates to a preparation method of all-water MDI foaming antibacterial polyurethane for a shoe material. The preparation method comprises the following steps of: treating polyether polyol, an emulsifier, an amine ether foaming catalyst, an alcohol amine cross-linking agent, an antibacterial agent and a foaming agent in a certain manner to obtain a mixture A; and uniformly mixing the mixture A and a raw material B according to a certain weight ratio, injecting the mixed material into a mold through an automatic PU casting machine, and performing curing to obtain the foaming antibacterial polyurethane for the shoe material. According to the preparation method of the invention, the molecular terminal of the antibacterial agent added into the polyurethane foaming system is positively charged, and bacteria are adsorbed on the surface by virtue of a positive ion fixed sterilization mechanism, so that 'contact death' occurs, and an antibacterial effect is achieved; one end of a hydrophilic group of the amphiphilic antibacterial agent can be crossed in a PU cross-linked network, so that the prepared shoe material has a longer antibacterial property and an excellent sweat absorption function; the antibacterial agent has good similar compatibility with reactants and is directly blended in a reaction system, the operation process is simple and convenient, and the all-water MDI foaming antibacterial polyurethane has a wide application range.

Description

technical field [0001] The invention relates to the technical field of health-care insoles, in particular to a preparation method for all-water MDI foamed antibacterial polyurethane used for shoe materials. Background technique [0002] In recent years, polyurethane materials have been widely used in various fields due to their excellent performance and low price. In view of the needs of real life, people have further requirements for the antibacterial properties of materials. Ordinary polyurethane materials can no longer meet people's daily needs. Therefore, polyurethane materials with excellent antibacterial properties have been increasingly developed. [0003] The Chinese patent No. CN201710793807.9 discloses a preparation method of fluorine-containing contact antibacterial polyurethane, which can indeed have good antibacterial performance, and the fluorine-containing part pulls positive charges to gather on the surface, but as we all know, the surface energy of fluorine ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, polyurethane materials have been widely used in various fields due to their excellent performance and low price. In view of the needs of real life, people have further requirements for the antibacterial properties of materials. Ordinary polyurethane materials can no longer meet people's daily needs. Demand, polyurethane materials with excellent antibacterial properties are increasingly developed

[0003] The Chinese patent No. CN201710793807.9 discloses a preparation method of fluorine-containing contact antibacterial polyurethane, which can indeed have good antibacterial performance, and the fluorine-containing part pulls positive charges to gather on the surface, but as we all know, the surface energy of fluorine is low, Not easy to conduct moisture, as a shoe material (sole), the human body comfort is not high;

[0004] Chinese Patent No. CN01113420.8 discloses an antibacterial polyurethane material obtained by using tannin or bark liquefaction containing tannin (i.e. tannin polyol) as a crosslinking agent, and due to the presence of tannin components, To make the polyurethane material have antibacterial effect, it is to carry out antibacterial modification to the crosslinking agent, which cannot be directly blended in polyether polyol or polyisocyanate, and the applicability is small;

[0005] The Chinese patent with the patent number CN200510134779.7 discloses a technology that uses a reactive quaternary ammonium salt antibacterial agent to participate in the PU reaction and bond it into a part of the PU structure, which can achieve long-term high-efficiency, safety, and pollution-free effects. However, the product has Single antibacterial performance, does not have good sweat absorption and moisture conduction function;

[0006] The Chinese patent No. 201710030120.X discloses an antibacterial polyurethane foam with a closed-cell structure, which has the disadvantages of poor air permeability and easy accumulation of sweat, causing foot discomfort

Images