Volatile waterborne polyurethane coating

Abstract

The invention discloses a volatile waterborne polyurethane coating and a preparation method thereof. The coating comprises the following components in parts by weight: 15 to 45 parts of neopentyl glycol, 5 to 20 parts of adipic acid, 10 to 30 parts of benzenetrimellitic anhydride, 5 to 15 parts of tetraisopropyl titanate, 20 to 30 parts of xylene, 10 to 30 parts of acetone, 15 to 30 parts of 10% phosphoric acid (toluene) liquid, 10 to 20 parts of 50% phenol (toluene) liquid, 5 to 15 parts of N-toluene diethanolamine, 10 to 30 parts of triethylamine, 5 to 15 parts of ethylenediamine, 5 to 15 parts of organic silicon resin, 20 to 40 parts of an adhesive, 10 to 30 parts of a thickening agent and 10 to 30 parts of deionized water. According to the volatile waterborne polyurethane coating, the organic silicon resin is added, so that the adhesiveness between different substrates for synthetic leather and a polyurethane coating material can be enhanced, the coating property and the adhesive force are correspondingly improved, meanwhile, the hydrolysis-resistant and smooth feeling is brought, and the volatile waterborne polyurethane coating can replace a toxic polyaziridine cross-linking agent.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a volatile water-based polyurethane coating. Background technique [0002] Leather finishing agent is a general term for a class of leather auxiliaries used to protect and beautify leather surface. The basics. Leather finishing agents also play a very important role in the leather manufacturing industry, which can increase the beauty of leather, prolong the use time of leather, significantly improve the quality and grade of leather products, and increase trade value. [0003] Existing leather finishing agents are usually made of acrylic resin, which is the most used type in the world, and its annual output accounts for about 70% of leather finishing agents. Compared with other chemical materials, the finishing material has many advantages, but its only defect is "hot sticking and cold brittleness". When the temperature is high, the leather will stick to the skin, and when the ...

AI Technical Summary

Problems solved by technology

[0003] The existing leather finishing agent materials usually use acrylic resin, which is the most widely used type in the world, and its annual output accounts for about 70% of the leather finishing agent. From the aspects of production cost, process and comprehensive performance, acrylic resin Compared with other chemical materials, the finishing material has many advantages, but its only defect is "hot stickiness and cold brittleness". When the temperature is high, the leather will stick to the skin, and when the temperature is low, the leather is easy to crack when folded, which makes it subject to climate change in use. Conditional restrictions