Ultra-soft wet process embossing-type polyurethane resin and preparation method and application thereof

Abstract

The invention discloses ultra-soft wet process embossing-type polyurethane resin and a preparation method and application thereof, in particular to the ultra-soft wet process embossing-type polyurethane resin which adapts to the direct hot pressing and cold pressing process. The ultra-soft wet process embossing-type polyurethane resin is prepared from isocyanate, a polyester polyol mixture, a mixed chain extender prepared by matching a chain extender with a pendant group with an ethylene glycol chain extender and N, N-dimethylformamide as an organic solvent. A block structure containing ethylene glycol chain extension makes the polyurethane resin structure have the characteristics of high stripping strength and good embossing property by combining with the side chain action after the chain extender with the pendant group fully reacts, and therefore, a wet process base manufactured by the invention can adapt to direct embossing on the base, and the embossed grains are full and clear; and the base has soft and elastic hand feeling and approaches the true skin feeling. The invention solves the problems of grain restriction, complicated process flow, higher manufacturing cost and the like of the traditional process.

Description

technical field [0001] The present invention relates to a synthesis method and production process of a wet-process polyurethane resin for synthetic leather, in particular to a preparation method and production process of an ultra-soft wet-process embossed polyurethane resin suitable for direct hot-pressing and cold-pressing processes . Background technique [0002] With the development of synthetic leather technology, today's synthetic leather materials are getting closer to the characteristics of natural leather. How to make synthetic leather feel closer to natural leather and have richer textures to meet the growing needs of consumers has become an issue. research focus in the field. [0003] At present, the embossing of shoe leather, garment leather, luggage leather and other products in the domestic market is mainly done in wet base (Note: DMF solvent and other fillers and additives are added to polyurethane resin to make a mixed solution, and vacuum machine degassing ...

AI Technical Summary

Problems solved by technology

First of all, the invention synthesizes ultra-soft wet-process embossing polyurethane resin, and the wet-process base made of it can adapt to embossing directly on the base, and the extruded lines are full and clear, and the base feels soft and elastic, which is closer to genuine leather It solves the limitations of the traditional embossing process, the complexity of the process, and the high production cost.

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