Phosphorus-containing polyurethane based polymeric dye with excellent flame

Polyester fabrics coated by polymeric dyes showed bright colours, excellent colour fastness and fame retardant properties.

To endow water-borne polyurethane (WPU) with bright color and improve the flame retardancy, a series of flame-retardant and colourful WPU (DOWPU) was synthesised by incorporating anthraquinone chromophore (DV26) and phosphorus-containing flame-retardant (OP550) into the skeleton simultaneously.

The migration property, thermal performance and flame retardancy of DOWPU were systematically characterised by a series of experiments, showing that DOWPU was endowed with bright colour and satisfactory flame retardancy.

Excellent color fastness and flame retardancy

Additionally, the chemists coated DOWPU on the polyester fabrics to prove the practicality. The coated fabrics not only had bright colours, but also exhibited excellent color fastness and flame retardancy.