Dry type polyurethane resin for pasting gold-silver film and preparation thereof

Abstract

The invention discloses a dry polyurethane resin for sticking a gold / silver film and a method for preparing the same. The raw materials of the dry polyurethane resin contain: diisocyanate polyalcohol compound, coupling agent, micro molecular dibastic alcohol chain extender having a molecular weight of 62-200g / mol, catalyst, auxiliary agent and solvent. During the synthesis of the polyurethane resin, the soft segment and the hard segment in the polyurethane chain segment are reasonably separated by adopting a special synthesis process and the coupling agent is grafted in the polyurethane chain segment, such that, during the film forming, the resin synthesized has reduced surface tightness, the scratch resistance and the abrasion resistance are not obviously changed, and the resin is easy to combine with the gold / silver film. Besides, the grafted coupling agent promotes the combination of the polyurethane material and the gold / silver film. The dry polyurethane resin for sticking a gold / silver film completely solves the prior defect of poor combination of the gold / silver film and the dry polyurethane resin. When in use, the dry polyurethane resin for sticking a gold / silver film is easy to combine with the gold / silver film, such that the scratch resistance, abrasion resistance and the bending performance of the finished products can be improved greatly.

Description

technical field [0001] The invention relates to a dry polyurethane resin for pasting gold and silver films, which is a dry polyurethane resin for shoe leather and bag leather, and also relates to a preparation method thereof. Background technique [0002] Film-based synthetic leather is favored by the market for its unique bright metallic luster, simple process conditions, and low cost. At present, the dry surface layer resin used in the film products produced by the release paper transfer method is very dense after the film is formed, which ensures the scratch resistance and wear resistance of the leather surface, but it also creates a big obstacle for the subsequent film. Gold and silver The poor bonding between the film and the dense dry surface layer makes the gold and silver film easy to fall off during use of this type of product, and the scratch resistance, wear resistance and bending performance are not good. As a result, its application is greatly limited. Conten...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to prepare a kind of dry polyurethane resin that utilizes the release paper transfer method to paste gold and silver film products, to solve the problem that the gold and silver film is not well combined with the dry surface layer in the production process of the gold and silver film class synthetic leather. The film is easy to fall off when used, and it is scratch-resistant, wear-resistant and poorly curved.