Crosslinked waterborne polyurethane with high waterproof performance

Abstract

Fluorinated acrylate and siloxane waterborne polyurethanes with crosslinked structure exhibit low water absorption, high water contact angles, and high mechanical/thermal properties.

Properties and degradation of castor oil-based fluoridated biopolyurethanes with different lengths of fluorinated segments

“…35 According to the XPS of the FCOPUs, the uorine content in the surface of 16FCOPUs was 1.03%, despite the theoretical uorine content being 1.92%; this may have resulted from castor oil with trifunctional groups, which may have formed the crosslinked structure of the FCOPUs, and such a crosslinked structure may inhibit uorinated segments from moving outward to the lm surface. 36 Additionally, the results revealed the O 1s binding energies of 8FCOPU, 12FCOPU, and 16FCOPU to be 532.38, 532.17, and 531.87 eV, respectively, implying that the O 1s binding energies decreased slightly with increases in the chain length. Berger et al 37 discussed the interaction of uorine and revealed the dipoledipole interaction in C-F/C]O, indicating that increases in the length of a uorinated chain extender might change the molecular interactions in PU lms.…”

The study of cationic waterborne polyurethanes modified by two different forms of polydimethylsiloxane

“…16,17 The incorporation of PDMS into polyurethane segments has been a frequently-used and effective method to improve the physical and chemical properties of WPUs. [18][19][20] Xu et al 21 prepared a blocking polyether silicone oil with an amino group modied CWPU, which was used as the nishing agent for cashmere knitted fabric. Li et al 22 researched the effects of the N-methyldiethanolamine content, the NCO/OH ratio, the trimethylolpropane content and other factors on the properties of polydimethylsiloxane polymers with monohydroxy modied cationic WPUs.…”

Improvement of self-cleaning waterborne polyurethane-acrylate with cationic TiO2/reduced graphene oxide

“…Aer treatment with UV radiation at room temperature, the mechanical properties of waterborne polyurethane acrylate (WPUA) are effectively improved. [6][7][8][9] Although the performance of the waterborne polyurethane has a certain improvement aer UV-curing, it still cannot meet the expected requirements. In this case, the above problem can be effectively improved by introducing a nanoller into the waterborne polyurethane system.…”