A method of manufacturing self-cleaning polyurethane synthetic leather highly resistant to hydrolysis and highly resistant to ultraviolet light illumination aging

Abstract

A method of manufacturing self-cleaning polyurethane synthetic leather highly resistant to hydrolysis and highly resistant to ultraviolet light illumination aging is disclosed. The method includes steps of fluorine containing polyurethane modifying, transfer membrane preparing, adhering, and the like. The method includes modifying the polyurethane resin with fluorine containing polyether glycol, glycerol and polyisocyanate under functions of a catalyst to prepare the fluorine containing polyurethane, evenly coating the front surface of release paper with the fluorine containing polyurethane slurry, drying, evenly coating a surface film with fluorinated acrylate modified polyurethane prepolymer slurry comprising a solidification crosslinking agent as an adhesive layer, adhering to a woven fabric base, drying, cooling, sizing, stripping from the release paper to obtain a semi-finished product, and curing at room temperature to obtain a finished product. The product prepared by the method has excellent hydrolysis resistance and resistance to ultraviolet light illumination aging, and can be widely used for sofa furniture and shoe fabrics in high-temperature high-humidity using environments.

Description

technical field [0001] The invention relates to the field of synthetic leather, in particular to a method for manufacturing self-decontamination polyurethane synthetic leather with high hydrolysis resistance and high ultraviolet light aging resistance. Background technique [0002] Polyurethane (PU) is the abbreviation of polyurethane. Polyurethane is an emerging organic polymer material and is known as the "fifth largest plastic". It has good optical properties, heat resistance, wear resistance and mechanical properties. It can be widely used in the production of materials such as synthetic leather, coatings, thermal insulation foam and TPU due to its adjustable performance. [0003] Synthetic leather is currently the most ideal material to replace natural leather products in the world. It is mainly used in footwear, bags, ball games, furniture and automobiles. With the improvement of people's living standards, people have also put forward higher requirements on the durabi...

AI Technical Summary

Problems solved by technology

With the improvement of people's living standards, people have put forward higher requirements on the durability of synthetic leather, especially in some public places and decoration projects, the performance of ordinary polyurethane synthetic leather cannot meet the requirements

[0004] Ordinary polyurethane synthetic leather mainly has the shortcomings of easy aging under water vapor, air and ultraviolet light environment. The porous structure of polyurethane synthetic leather has strong adsorption characteristics, which absorbs water molecules and oxygen molecules in the air, resulting in the water resistance of polyurethane synthetic leather. At present, there are mainly two ways to improve its hydrolysis aging resistance. One is to add perfluorinated organic compounds to the coating slurry, so that the coating has a certain water repellency and delays the aging process to a certain extent. The hydrolytic aging of the coating has not been fundamentally improved; the second is to repair the hydrolytic aging-sensitive groups (such as ester bonds) of polyurethane or use polyether or polycarbonate polyurethane with better hydrolytic performance, but, although These methods solve the problem of hydrolysis resistance of synthetic leather, but there are also problems of poor cold resistance, folding resistance and UV aging resistance.

At present, polyurethane synthetic leather has yellowing or even cracking under ultraviolet light, which is mainly improved by adding ultraviolet absorbers to the coating slurry, which cannot fundamentally eliminate such problems