Organic fluorine modified waterborne polyurethane emulsion and preparation method thereof

Abstract

The invention belongs to the technical field of composite emulsions, and particularly relates to an organic fluorine modified waterborne polyurethane emulsion and a preparation method thereof. The organic fluorine modified waterborne polyurethane emulsion is prepared from polytetrahydrofuran ether glycol, 1, 4-butanediol, isophorone diisocyanate, dimethylolpropionic acid, perfluoropolyether oil, butyl acrylate, dibutyltin dilaurate and N, N-dimethylformamide; the cleaning agent is prepared from N, N-dimethylol acetamide, acetone, triethylamine and deionized water, wherein the weight part ratioof the above raw materials is (5-15): (2-4): (5-10): (1-3): (1-3): (0.41-1): (0.1-0.5): (1-4): (2-5): (10-15): (15-25). The emulsion is better in tensile strength.

Description

technical field [0001] The invention belongs to the technical field of composite emulsions, and in particular relates to an organic fluorine-modified water-based polyurethane emulsion and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the enhancement of people's awareness of environmental protection, the application of water-based polyurethane has gradually expanded from finishing agents to coatings, adhesives and other fields. Its excellent water resistance, weather resistance, flame resistance and chemical corrosion resistance. It has become a key topic in the research of water-based resin. However, the application of water-based polyurethane is also accompanied by disadvantages such as poor physical properties. In the past production, the ratio of isocyanate group to hydroxyl group (R value) in the system was increased to increase the proportion of hard segments in water-based polyurethane to improve the phys...

AI Technical Summary

Problems solved by technology

However, the application of water-based polyurethane is also accompanied by disadvantages such as poor physical properties. In the past production, the ratio of isocyanate group to hydroxyl group (R value) in the system was increased to increase the proportion of hard segments in water-based polyurethane to improve the physical properties of the film. performance, but it also reduces the stability of the emulsion, causing great inconvenience to the storage and transportation of the emulsion

[0003] CN106750126A discloses a preparation method of water-based polyurethane without co-solvent, by dissolving hydrophilic chain extender in aliphatic aliphatic glycol, and carrying out water-phase chain extension by ethylenediamine to avoid the use of organic solvents, However, the maximum tensile strength of the film made from the obtained emulsion is 32.77MPa, which cannot be adapted to some operating environments with high physical performance requirements.