Imidazole salt type cationic polyurethane and preparation method thereof

Abstract

The invention discloses imidazole salt type cationic polyurethane and a preparation method thereof. The preparation method comprises the following steps: 1) mixing 1mol of dibromoneopentyl glycol with 2mol of imidazole compound to react and obtain imidazole salt glycol; and 2) mixing 1-10mol of imidazole salt glycol, 1-10mol of long-chain glycol with the weight average molecular weight of 100-2000, 1.8-20mol of diisocyanate, tetrahydrofuran and 2-3 drops of catalyst to react in the atmosphere of nitrogen and obtain the cationic polyurethane, wherein the molecular structure of the imidazole salt type cationic polyurethane is AxByCz, A is imidazole salt glycol, B is diisocyanate, C is long-chain glycol; and (x+z) / y=1.0-1.1; and the ratio of x to z is 0.1-10.0. In the preparation method of the invention, the charged functional groups of glycol are expanded, imidazole salt glycol ionic liquid is introduced and the imidazole salt type cationic polyurethane is prepared; and the electrophoretic mobility can not be damaged by acid or base. Cationic polyurethanes with unequal electric charges can be prepared by adjusting the proportion of imidazole salt glycol; and the cationic polyurethane can be coated on elements through electrostatic adsorption, thus better protecting and stabilizing the base material.

Description

technical field

[0001] The invention relates to an imidazolium salt cationic polyurethane and a preparation method thereof. Background technique

[0002] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeated carbamate groups (NHCOO) on the main chain. By adjusting the properties and proportions of the functional groups contained in isocyanate, long-chain diols, and short-chain diols, linear thermoplastic resins or body-shaped thermosetting resins can be prepared. Abrasive, low temperature resistance, solvent resistance, biological aging resistance, high-performance polymers that are not easy to degrade. Its excellent processing performance makes it possible to make products with various properties from plastic to rubber, from soft to hard, so it is widely used in rigid or flexible foam plastics, elastomer materials, coatings, adhesives, synthetic materials, etc. Leather and fiber and many other fields. [0...

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