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Research on the Water-resistance of Waterborne Polyurethane Leather Finishing

LV Wei-zhong,LIU Bo,WEI Shao-hui(College of Science Shenzhen University,Shenzhen 518060)  
The effects of the polyester,the molecular weight,COOH%,NCO/OH(total mol/mol),amount of TMP,the neutralization and the degree of neutralization,the end viscosity of pre-polymer on the water-resistance of waterborne polyurethane leather finishing were discussed respectively.The result show that the water-resistance of waterborne polyurethane film is enhanced with advance of the molecular weight of polyester and NCO/OH but reduced with the advance of COOH%,TMP% and the degree of neutralization.
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