Waterborne polyurethane dispersion with quadrupolar hydrogen bond and preparation method of waterborne polyurethane dispersion

Abstract

The invention discloses a waterborne polyurethane dispersion with a quadrupolar hydrogen bond and a preparation method of the waterborne polyurethane dispersion. A repeating unit of a polyurethane molecular chain is a quadrupolar hydrogen bond element of a 2-ureido-4[1H]-pyrimidone type, the non covalent bond has a very high binding constant and reversibility, and probability of constructing a complex functional material is provided. As an amino-uracil monomer joins in diisocyanate, the quadrupolar hydrogen bond of the 2-ureido-4[1H]-pyrimidone type is introduced into a green and low-toxicityenvironmental-friendly macromolecule system, namely waterborne polyurethane, in a macromolecule dihydric alcohol prepolymerization mode, and thus a low VOC (volatile organic compound) polymer which isgood in self healing capability and high in tension strength can be prepared. The waterborne polyurethane dispersion has very good research prospects and application values in the field of polyurethane functional coatings.

Description

technical field

[0001] The invention belongs to the field of preparation and application of polymer materials, and in particular relates to an aqueous polyurethane dispersion containing quadruple hydrogen bonds and a preparation method thereof. Background technique

[0002] In recent years, the preparation of supramolecular polymers with self-assembly properties by introducing non-covalent bonds has become a hot topic. Supramolecular polymers refer to the special polymers in which repeated monomer units are combined by reversible and highly oriented forces, and exhibit polymer properties in solution or in bulk. Applying the theory and technology of supramolecular self-assembly phenomena, Polymer science applies the idea of ​​supramolecules to the preparation of new functional materials, and develops polymer materials with special functions and properties, such as self-healing materials, high-resilience materials, and shape-memory materials, which have great research prospect...

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