Hydrolysis-resistant corrosion-resistant polyurethane synthetic leather

Abstract

The invention discloses hydrolysis-resistant corrosion-resistant polyurethane synthetic leather, which is obtained by infiltrating a modified polyurethane emulsion into a non-woven fabric by a wet manufacturing process; specifically, firstly 2-butene-1,4-diol and heptamethyltrisiloxane are used for a hydrosilylation addition reaction to obtain a silanol compound with the structure shown as the formula A; next, isophorone diisocyanate, polypropylene glycol and the silanol compound A are subjected to block copolymerization to obtain a prepolymer with the structure shown as the formula B; under the action of a chain extender DMPA, further polymerization is performed to obtain a condensate C; organosilicone with low surface energy is embedded in the synthesis of polyurethane; then a carboxylated carbon nanotube is introduced by a hydrogen bonding mode to form a superhydrophobic protective layer, so that the hydrolysis resistance and corrosion resistance of the polyurethane synthetic leather are greatly improved, thereby realizing good application prospects.

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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