Self-extinction waterborne polyurethane coating and preparation method thereof

Abstract

The invention provides a self-extinction waterborne polyurethane coating and a preparation method thereof, belonging to the field of aqueous coatings. The coating comprises a component A and a component B. The component A comprises the following components in parts by weight: 30 to 40 parts of organic silicon modified waterborne polyurethane, 10 to 20 parts of water-based hydroxyl acrylate dispersoid, 12 to 18 parts of modified silicon dioxide extinction powder, 5 to 10 parts of lignin, 2 to 5 parts of light calcium carbonate, 1 to 3 parts of halloysite, 1 to 3 parts of sericite, 4 to 8 partsof polyamide wax slurry, 0.5 to 1 part of an MA-SAS-BA copolymer dispersing agent, 0.1 to 0.2 part of triethanolamine, 0.1 to 1 part of lauryl sodium sulfate, 1 to 1.5 parts of sodium monododecyl phosphate, 2 to 6 parts of a water-based defoamer BYK024, 4 to 8 parts of a water-based leveling agent BKY346, 5 to 10 parts of propylene glycol monomethyl ether, 0.1 to 1 part of a nonionic polyurethaneassociative thickener, 10 to 20 parts of propylene glycol methyl ether acetate and 60 to 80 parts of water. The component B is a curing agent WT-2102. The self-extinction waterborne polyurethane coating disclosed by the invention is stable in property; and a film formed by the coating is stable in property and resistant to acid, alkali and solvent corrosion, and has strength, toughness and hardness meeting national standards.

Description

technical field

[0001] The invention relates to the field of water-based paints, in particular to a self-dulling water-based polyurethane paint and a preparation method thereof. Background technique

[0002] In the coating industry, polyurethane is the most used and most promising type of polymer family. Polyurethane is a high-performance polymer material with oligomeric polyol as the soft segment and isocyanate and chain extender as the hard segment. The block compound of segment, its chemical structure contains various polar bonds such as carbamate, ether bond, urea bond and allophanate bond, these polar bonds endow it with superior bonding performance and film forming Performance, so that it has many properties such as abrasion resistance, chemical corrosion resistance, low temperature resistance, good flexibility and strong adhesion. Its elastomers, foam plastics, coatings and adhesives have been widely used.

[0003] At present, polyurethane coatings are mainly solvent...

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