Organic silicon-modified polyurethane resin for synthetic leather and preparation method thereof

Abstract

The invention designs organic silicon-modified polyurethane resin for synthetic leather and a preparation method thereof, which relates to the field of processing of the synthetic leather and aims at solving the technical problems of poor anti-sticking property, water resistance, wear resistance and other properties of the existing synthetic leather. The organic silicon-modified polyurethane resin disclosed by the invention is characterized by comprising the following raw material ingredients in percentage by weight: 2%-30% of diisocyanate, 5%-40% of polyester or polyether type polylol, 0.5%-20% of hydroxyl-terminated organic silicon, 0%-10% of small molecular polylol chain extender, 0%-13% of small molecular polyamine chain extender, 0.01%-1% of catalyst and the balance of solvent, wherein the hydroxyl-terminated organic silicon adopts a polyether-polysiloxane copolymer with two ends which are of hydroxyl groups, and a polyether chain segment is of polyoxyethylene or polyoxypropylene. The glossiness and transparency of the polyurethane resin after modification can not be affected by the organic silicon, and the anti-sticking property, surface smoothness, wear resistance and waterresistance are obviously improved simultaneously.

Description

technical field [0001] The invention relates to the field of synthetic leather processing, in particular to an organosilicon-modified polyurethane resin for synthetic leather and a preparation method thereof. Background technique [0002] When polyurethane resin is applied to the dry surface layer or surface finishing agent of synthetic leather, silicone additives are usually added to improve the hand feel of the product, and improve the anti-sticking, water resistance and wear resistance of the product. The way of adding is generally to add silicone additives to polyurethane resin through physical mixing. Due to the poor compatibility between silicone and polyurethane resin, the addition of simple physical mixing will lead to the precipitation of silicone. It will cause oil on the surface of the product. In addition, the poor compatibility of polyurethane resin and silicone resin will also cause side effects such as whitening of the resin film and decrease in gloss, which w...

AI Technical Summary

Problems solved by technology

The way of adding is generally to add silicone additives to polyurethane resin through physical mixing. Due to the poor compatibility between silicone and polyurethane resin, the addition of simple physical mixing will lead to the precipitation of silicone. It will cause oil on the surface of the product. In addition, the poor compatibility of polyurethane resin and silicone resin will also cause side effects such as whitening of the resin film and decrease in gloss, which will affect the appearance of the product. The side effects are becoming more and more obvious

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