Hydrolysis resistant urethane resin for garment synthetic leather as well as preparation method and application thereof

Abstract

The invention provides hydrolysis resistant urethane resin for garment synthetic leather. The urethane resin comprises the following components in part by weight: 5 to 25 parts of isocyanate compound, 5 to 10 parts of polyester polyhydric alcohol compound, 10 to 40 parts of polyether polyhydric alcohol compound, 0.2 to 1.0 part of hydroxyl-containing low molecular weight compound, 1 to 10 parts of accessory ingredient, 1 to 10 parts of additive and 50 to 90 parts of dimethyl formamide. The invention also provides a preparation method of the urethane resin and the application of the urethane resin to the preparation of the synthetic leather. The preparation method of the urethane resin is simple, the cost is low, the content of ester linkage in the urethane resin is greatly reduced by introducing a large amount of polyether to raw materials, the hydrolysis resistance performance of the urethane resin is greatly improved, and the service life of synthetic leather garment is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of chemical products and preparation methods thereof, and in particular relates to a hydrolysis-resistant polyurethane resin for garment synthetic leather, and also relates to a preparation method and application of the polyurethane resin. Background technique [0002] At present, in the clothing leather market, genuine leather resources are increasingly scarce and expensive. With the development of clothing synthetic leather technology in recent years, synthetic leather is very close to genuine leather in terms of style and feel, and even surpasses genuine leather in some aspects. At the same time, due to the low price and various styles of synthetic leather clothing, synthetic leather clothing has already occupied more than half of the leather clothing, and is favored by foreign consumers. [0003] However, the service life of general synthetic leather clothing is only about 2 years, especially in some ha...

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Problems solved by technology

[0003] However, the service life of general synthetic leather clothing is only about 2 years, especially in some harsh environments, such as the container of export clothing at sea, due to high temperature and long cycle, the service life is greatly reduced, and the clothing is often delivered to the destination. Cracking and pulverization have already occurred

Because the ester bond content of the polyurethane resin used in synthetic leather clothing is too high, and the ester bond is easy to decompose under high temperature and humid environment, resulting in poor hydrolysis resistance of polyurethane resin, so the hydrolysis resistance of synthetic leather clothing is poor. When exposed to water or humid environment, it is prone to cracking and pulverization

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