Environment-friendly water-based double-component polyurethane floor coating

Abstract

The invention relates to an environment-friendly water-based double-component polyurethane floor coating. A component I is water-based aliphatic isocyanate containing 100% by mass of solid content, a component II comprises the following components by weight parts: 10-18 parts of water, 4-10 parts of modified polymeric dispersant, 0.1-0.3 parts of non-ionic and / or anionic wetting agent, 2-20 parts of pigment, 3-15 parts of filler, 40-70 parts of acrylic hydroxyl emulsion, 3-6 parts of functional resin, 0.1-0.5 parts of polyether modified siloxane defoamer, 0.1-0.3 parts of polyether modified siloxane flatting agent, 0.1-0.3 parts of heterocyclic fungicide and 0.2-1.0 part of solvent-free polyurethane thickening agent. When the floor coating is used, the component I and the component II are mixed according to the mass ratio of the component I to the component II being 1:(5-6). According to the coating, all the performances of the coating completely meet the requirements of solvent-based floor coating, the artificial aging resistance is excellent, and the volatile organic compound content in the water-based double-component polyurethane floor coating is obviously lower than that of single-component water-based polyurethane floor coating, and the environmental requirement is met.

Description

technical field [0001] The invention relates to an environment-friendly water-based two-component polyurethane floor paint. It is especially suitable for the decoration and protection of various indoor and outdoor floors, especially outdoor sports floors. Background technique [0002] At present, more than 80% of domestic floor coatings are solvent-based, including polyurethane floor coatings and epoxy floor coatings. These solvent-based floor coatings all contain more organic solvents, which not only cause serious harm to the environment and human health, but also are a great waste of petroleum resources. Solvent-based polyurethane floor coatings also contain a certain amount of free isocyanate monomers, which will seriously affect people's health and living environment during construction. In addition, solvent-based floor coatings will be affected and restricted by ambient temperature and humidity, grass-roots humidity, and other problems on the base surface. In particul...

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Problems solved by technology

Most of the disclosed water-based floor coating patents relate to water-based epoxy floor coatings, such as Chinese patents CN101565584A, CN1702132A, CN1597812A, etc. Although the organic solvent content in these floor coating systems is far lower than that of existing solvent-based floor coatings , but the shortcomings of epoxy resin such as poor weather resistance and brittle and easy cracking of the coating film cannot be overcome, so it cannot meet the requirements of outdoor sports floors that have high requirements for weather resistance

CN101362922A discloses a kind of water-based single-component aliphatic polyurethane floor paint, compared with water-based epoxy floor paint, it has good wear resistance and weather resistance, but because the base material used is water-based single-component fat Polyurethane emulsions, whose coating film is not chemically cross-linked, cannot provide good weather resistance, and a certain amount of co-solvent still needs to be added when preparing the coating, which also increases the content of organic volatiles in the coating, which is harmful to the environment and Human body is affected

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