Dihydroxyl cationic hydrophilic chain extender and application thereof in synthesis of cationic aqueous polyurethane dispersoid

Abstract

The invention relates to a dihydroxyl cationic hydrophilic chain extender and application thereof to synthesis of cationic aqueous polyurethane dispersoid. A secondary alcohol-containing tert-amino glycol cationic hydrophilic chain extender is synthesized by ring-opening reaction of amine compounds and epoxy resin and is introduced into aqueous polyurethane. Through the adoption of the dihydroxyl cationic hydrophilic chain extender, the reaction is mild in the prepolymerization process of the aqueous polyurethane, the viscosity is low, the using amount of the solvent is small and the volatile organic compound (VOC) content of the emulsion is low. The cationic aqueous polyurethane synthesized by the cationic hydrophilic chain extender can be applied to middle and lower coating of genuine leather and artificial leather, seal coat of wood, sizing agent on the surface of paper, and anti-pilling agent, fabric color-fixing agent and antistatic agent during textile treatment. The cationic aqueous polyurethane emulsion is synthesized.

Description

technical field [0001] The invention relates to a dihydroxy-containing cationic chain extender Y-51 and a synthesis process of using the chain extender Y-51 to synthesize a cationic water-based polyurethane dispersion, belonging to the field of new chemical material preparation. Background technique [0002] Water-based polyurethane refers to the use of water instead of organic solvents as the dispersion medium. The system does not contain or contain a small amount of organic solvents, that is, environmentally friendly materials. It has the advantages of cheap, safe, non-flammable, non-toxic, and non-polluting. The advantages of wide adjustable range of hard segment, low temperature resistance, good flexibility and strong adhesion are gradually being recognized by people. As an excellent green environmental protection material, its production and application conform to the sustainable development strategy and have been recognized by the world. Encouragement and support from ...

AI Technical Summary

Problems solved by technology

At present, diols containing tertiary amino groups are usually used as chain extenders, such as N-methyldiethanolamine (MDEA), and cationic groups are obtained by quaternization with alkylating agents or suitable acids. However, such tertiary amines The diol in the base is a primary alcohol, which is relatively active. The reaction is more violent in the prepolymerization stage, and it is easy to gel. More solvents need to be added, resulting in an increase in the VOC content of the emulsion.