Formula and preparation method of water-based self-extinction polyurethane leather finishing agent

Abstract

The invention provides a water-based self-extinction polyurethane leather finishing agent formula and a preparation method thereof. The polyurethane leather finishing agent comprises the following components in parts by weight: 1.0 to 18.03 parts of polyol, 0.83 to 4.66 parts of diisocyanate, 0.006893 to 0.01838 part of a catalyst, 0.44 to 0.5 part of a hydrophilic chain extender, 0 to 0.2 part ofa small molecular chain extender, 0.25 to 0.29 part of a neutralizer, 0.1 to 0.2 part of an antioxidant, 0.1 to 0.2 part of an ultraviolet-resistant absorbent, 7.0 to 10.0 parts of a solvent, 0.2 to0.25 part of cellulose acetate butyrate, 62.0 to 64.9 parts of water, 0.3 to 0.4 part of foam-free penetrating agent, 0.55 to 1.6 parts of amine chain extender, 0.3 to 0.4 part of silicone emulsion and 1.4 to 2.5 parts of alkali swelling thickening agent. By means of the technical scheme, the prepared water-based self-extinction polyurethane leather finishing agent is stable in extinction and adjustable in extinction degree, the finished leather is soft in hand feeling, an extinction coating does not turn bright after hot pressing, the product placement performance is stable, and the workshopproduction reproducibility is good.

Description

technical field [0001] The invention relates to the technical field of leather finishing, in particular to a water-based self-dulling polyurethane leather finishing agent and a preparation method of the water-based self-dulling polyurethane leather finishing agent. Background technique [0002] In leather products, advocating natural style and pursuing genuine leather touch has become a trend. Matte and matte leather surfaces have a softer, natural and elegant appearance, and are increasingly favored and sought after by consumers. [0003] Because the traditional matting finishing agent achieves the matting purpose by adding micronized wax and inorganic silica matting powder, there are the following technical defects: there is a lot of dust pollution in the production process, the stability of the product is poor, and it is easy to delaminate and precipitate; The phenomenon of "gray, white, not black" is easy to appear; the brittleness of the coating increases, and it is eas...

AI Technical Summary

Problems solved by technology

[0011] For this reason, the object of the present invention is to provide a kind of water-based self-dulling polyurethane leather finishing agent formula and preparation method thereof that are soft, and do not return to brightness after hot pressing, aim to solve the existing water-based self-dulling polyurethane leather finishing agent that is used for leather. Insufficient degree, brightening of matte coating after hot pressing, hard hand feeling, unstable matting performance of product batches and poor repeatability, etc.

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