Hydrolytic Corrosion Resistant Polyurethane Synthetic Leather

Abstract

The invention discloses a polyurethane synthetic leather resistant to hydrolysis and corrosion, which is obtained by infiltrating a modified polyurethane emulsion into a non-woven fabric through a wet manufacturing process. The hydrosilylation reaction has obtained the silanol compound of the formula A structure, followed by block copolymerization of isophorone diisocyanate, polypropylene glycol and silanol compound A to obtain the prepolymer of the formula B structure, in the chain extender DMPA Condensate C was obtained by further polymerization under the action of condensate C. The low surface energy silicone was embedded in the synthesis of polyurethane, and then the carboxylated carbon nanotubes were introduced into the carboxylated carbon nanotubes in the form of hydrogen bonds to form a superhydrophobic protective layer, which greatly improved It improves the hydrolytic corrosion resistance of polyurethane synthetic leather and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of leather product manufacturing, and in particular relates to a hydrolysis-resistant polyurethane synthetic leather. Background technique [0002] Polyurethane synthetic leather belongs to the category of polyurethane elastomers. It has soft and natural luster, soft touch, and a strong leather-like appearance. It has excellent mechanical properties such as excellent adhesion to substrates, wear resistance, flex resistance, and aging resistance. At the same time, it also has the advantages of good cold resistance, breathability, washability, convenient processing, and low price. It is the most ideal substitute for natural leather. [0003] At present, the technical synthesis methods of polyurethane synthetic leather mainly include dry method and wet method. The dry method generally uses the release paper as the carrier, scrapes the polyurethane resin slurry on the release paper, heats and dries to remove the solvent ...

AI Technical Summary

Problems solved by technology

[0004] Although the current water-based polyurethane synthetic leather already has good hydrolysis resistance, the existing polyurethane uses fluorine-containing raw materials to increase its water resistance, but fluorine-containing raw materials will not only cause environmental pollution, but also affect human health. , the post-processing of the finished product is also troublesome. The acid and alkali corrosion resistance of the finished synthetic leather is poor. After being stained with acid and alkali, the durability of the synthetic leather will be greatly reduced, the decomposition reaction of the polyurethane resin will be promoted, and the surface of the synthetic leather will be cracked and damaged. Reduced service life

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