Shoe polyurethane adhesive prepared from recycled solvent and processing method

Abstract

The invention relates to a shoe polyurethane adhesive prepared from a recycled solvent, which is prepared from the following components: isophorone diisocyanate, poly (1, 4-butylene adipate), polyethylene glycol N-120, dimethylolpropionic acid, stannous octoate, the recycled waste solvent, deionized water, ethylenediamine, triethylamine and a tackifier. The processing method of the shoe polyurethane adhesive prepared from a recycled solvent comprises two steps. The processing process is optimized and screened, is scientific and stable, is easy to operate, and is low in toxicity compared with a traditional solvent type polyurethane adhesive. The waste solvent generated in the preparation process of the aqueous dispersion of the polyurethane adhesive is utilized, so that the effects of saving energy, reducing emission, protecting the environment and recycling resources are achieved. The film-forming property of the adhesive prepared from the recycled solvent is better than that of a pure water-based adhesive, so that the effect of reducing the cost is realized, and the emission of VOC is reduced. On the basis, the method has a good and wide application prospect.

Description

technical field [0001] The invention relates to the technical field of adhesives for shoes, in particular to a polyurethane adhesive for shoes made from recycled solvent and a processing method. Background technique [0002] Adhesive for shoes is a material widely used in shoe production. The existing solvent-based adhesives for shoes have a high solvent content (mostly more than 80%) and most of them contain triphenyl, which will not only affect the health of shoemakers, but also have a certain impact on the environment. What's more, the existing water-based adhesive has a solid content of more than 30% and the bonding effect is good, so it will relatively increase the production cost. Finally, the waste solvents (water-soluble solvents containing 5-30% water, such as acetone, methyl ethyl ketone, ethyl acetate, etc. ) is difficult to deal with, direct discharge will not only cause waste, but also cause environmental pollution. Contents of the invention [0003] In ord...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the technical limitations of existing shoe adhesives, the use of triphenyl will affect the health of workers and the environment, the high solid content of water-based adhesives will cause increased production costs, and the disadvantages of difficult waste solvent treatment. The invention provides that the triphenyl-free, water-based adhesive with relatively low solid content can achieve the same effect as the prior art, and can effectively utilize the waste solvent produced in the process of making the aqueous dispersion of the existing water-based polyurethane adhesive. This ensures the health of the staff, reduces the pollution to the environment, and reduces the production cost of a polyurethane adhesive for shoes made of recycled solvent and its processing method

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