Photocurable polyurethane acrylate for textile artificial leather
Researchers have proposed an eco-friendly photocurable textile artificial leather coating strategy. The fabricated artificial leather exhibited excellent colourfastness.
A new photocurable coating process that combines ultra violet light emitting diode (UV-LED) and deliberately synthesised photocurable polyurethane acrylate (PUA) was developed in a new study. By adjusting the molecular weight and the number of functional groups in the PUA, balanced the wear resistance and flexibility of the photocured coatings were achieved.
Excellent colourfastness
The optimal formula for photocurable coating was obtained as follows: the R-value (the molar ratio of –NCO/–OH) of PUA was 1.3, the ratio of PUA/HEA (2-hydroxyethyl acrylate) was 60 wt%/40 wt%, and the ratio of end-capped agent HEA/PETA (pentaerythritol triacrylate) was 2/1. With the optimised photocurable coating formula, textile artificial leathers were fabricated and exhibited excellent colourfastness to rubbing, and Martindale abrasion resistance and satisfied fabric handle.
The study has been published in Progress in Organic Coatings, Volume 171, October 2022.
