Sustainable Solvent Free Water-based PU

2018 Jan


Sustainable  Solvent Free Water-based PU  

　　In the synthesis process, the solvent-based PU pre-polymers have high viscosity, thus, it needs a lot of solvent to decrease the viscosity and increase dispersion of PU. However, the solvent will cause a lot of VOCs air emission and produce large amount of the Carbon Dioxidein the synthesis process and finishing process.We need to use a lot of energy to recall the solvent and burn the VOCs by the Regenerative Thermal Oxidizer (RTO).


 　　The water-based PU technology has been improved gradually. The low solvent content water-based PU has been used on textile, but this synthesis process still adopts some Acetone(0.1 wt.% to 5.0 wt.%) that need large amount of energy to remove the solvent by the vacuum distillation. The final water-based PU products still content some VOCs residuals.

 

　　The SFWPU produced by modified solvent free process without using any organic solvent to melt the raw materials and to reduce the viscosity of the pre-polymer in the process. The products made by this innovative modified solvent free process meets the standards of ZDHC organization and they are environmentally friendly products.                                                                                                            innovation          PU comparsion      

　　The SFWPU has good testing performance.　The coating adhesion on textile after aging test, 

NaOH 4 % 100 °C x 1 Hr, is still no delimitation over 200 cycles base on ISO5981 Scrub Test.

It is good for different coating requirement either with simple coating or water resistance 1500mm.  

 

 

 

 


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