Bi-component reaction-type flame-retardant waterborne polyurethane and preparation method thereof

Abstract

The invention discloses bi-component reaction-type flame-retardant waterborne polyurethane and a preparation method thereof. Although the present single-component waterborne polyurethane has convenient construction, multiple performances of the present single-component waterborne polyurethane such as water resistance, solvent resistance, chemicals resistance, abrasion resistance, hardness and the like cannot reach the requirement of the performance of the solvent-type polyurethane. The bi-component reaction-type flame-retardant waterborne polyurethane consists of a component A and a component B, wherein the mass ratio of the components A and B is 5 to 15:1, the component A is obtained by dispersing prepolymer which is synthesized by non-flame-retardant polyalcohol, flame-retardant polyalcohol, diisocyanate, hydrophilic chain extender and catalyst into neutralizer water solution, and the component B is of hydrophilia polyisocyanates curing cross-linking agent. The polyisocyanates is used as the cross-linking agent for crosslink and curing, so the crosslink density of the waterborne polyurethane is greatly improved, and the performance of the water borne polyurethane can be equaled to that of the solvent polyurethane coat.

Description

technical field [0001] The invention relates to a two-component reactive flame-retardant waterborne polyurethane and a preparation method thereof. Background technique [0002] At present, the surface protection of wooden furniture, wooden structures, wooden floors and other wood products are mostly solvent-based paint coatings, and solvent-based paint coatings need to add a large amount of volatile organic solvents during production, construction and curing, causing pollution to the environment . In recent years, countries around the world have gradually paid attention to the hazards of volatile organic compounds (VOC) in organic waste gas. The regulations on VOC control have become increasingly stringent. Some developed countries in the West have clearly stipulated the types and amounts of organic compounds emitted. Water-based polyurethane uses water as the medium. Water is non-flammable, non-explosive, non-toxic, tasteless, will not pollute the environment, and has good...

AI Technical Summary

Problems solved by technology

One-component water-based polyurethane is easy to construct, but it still cannot achieve the performance of solvent-based polyurethane in many properties such as water resistance, solvent resistance, chemical resistance, abrasion resistance, hardness, etc.