Morpholog and Conductivity of High-Solid Content Waterborne Polyurethane Dispersions with Sulfonated Polyol and Carboxylic Polyol as Compound Hydrophilic Chain Extender

Xiao Li Wei; Fa Xing Zhang; De Jun Cheng

doi:10.4028/www.scientific.net/AMR.472-475.89

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 472-475Morpholog and Conductivity of High-Solid Content...

Morpholog and Conductivity of High-Solid Content Waterborne Polyurethane Dispersions with Sulfonated Polyol and Carboxylic Polyol as Compound Hydrophilic Chain Extender

Abstract:

In this study , a type of compound hydrophilic chain extenders composed of a polyol containing short sulfonated side chain ,designated as DHPS and dimethylolpropanoic acid( DMPA), were used to prepare high-solid content waterborne polyurethane by self-emulsification .The effect of ratio of DHPS and DMPA on morpholog and the particle size of waterborne polyurethane were analyzed. The effect of ratio of DHPS and DMPA ,the addition of CaCl2 solution and HCl solution ,dilution on conductivity of waterborne polyurethane were investigated. The results show that the WPU dispersions exhibit the spherical particles and the characteristic of wide size distribution, the average diameter and distribution became smaller and narrower with the ratio of DHPS and DMPA increasing. With an increase of ratio of DHPS and DMPA conductivity increased. At the same time , conductivity changed with the addition of CaCl2 and HCl solutions content.