A kind of waterborne elastic polyurethane flame retardant coating and preparation method thereof

Abstract

The invention discloses a waterborne elastic polyurethane flame-retardant coating and a preparation method thereof. The waterborne elastic polyurethane flame-retardant coating is prepared from, by weight, 18 to 40 parts of waterborne elastic polyurethane resin, 8 to 18 parts of a nitrogen-phosphorus flame retardant, 10 to 16 parts of an inorganic flame retardant, 3 to 6 parts of a pigment filler,2 to 4 parts of a dispersing agent, 0.5 to 1 part of a thickening agent and 10 to 15 parts of pure water, wherein the elastic elongation of the waterborne elastic polyurethane resin is 300-800%; and the waterborne elastic polyurethane resin is synthesized from isocyanate and polyurethane resin containing polycarbon, polyether and polyester, and the waterborne elastic polyurethane resin contains aplurality of hydroxyl functional groups. According to the provided preparation method of the waterborne elastic polyurethane flame-retardant coating, a coating film formed by applying the prepared coating has elasticity, no cracking and good flame-retardant effect, the surface of the coating film has hydrophilicity, and the cooling efficiency of fire-fighting water can be improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based elastic polyurethane flame-retardant coating and a preparation method thereof. Background technique [0002] Polyurethane flame retardant coating is a kind of flame retardant functional coating used on the surface of soft substrates such as synthetic leather products for interior architectural decoration, leather sofas, wallpaper, and decoration. Synthetic leather products for interior decoration, leather sofas, wallpaper, etc. are commonly used items in indoor households, and they are also potential hidden dangers of indoor fire safety. The fire safety of indoor furniture, decoration and decorative materials in buildings also has very important fire safety requirements. . [0003] Polyurethane flame-retardant coatings, especially flame-retardant coatings used on soft substrates, must not only have flame-retardant functions, but also have tensile strength and elas...

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Problems solved by technology

[0004] The polyurethane flame-retardant coatings of the prior art, whether solvent-based or water-based flame-retardant coatings, have strong hydrophobicity after film formation. On the surface of the coating film, the contact angle between the hydrophobic coating film and water is large, and the water forms beads on the surface of the coating film, which makes it difficult for the water to spread and level off on the surface of the coating film, and the cooling speed is slow, which reduces the fire extinguishing effect of firefighting water. efficiency

[0005] Furthermore, the prior art uses ordinary non-elastic polyurethane resin as the film-forming resin of flame-retardant coatings, and the proportion of film-forming resin in the coating formula is small, and the proportion of powdery pigments and filler components is large. The cracking and bending resistance of the coating film coated on the soft substrate is poor, and the surface is easy to crack and not decorative, so it is not suitable for indoor architectural decoration

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