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              Lesson 3 Waterborne polyurethane
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                      The application viscosity of solutions of polyurethanes in organic solvents required fortechnical reasons imposes a restriction in terms of the molecular weight. By contrast,polyurethane/urea dispersions can be produced in the heterogeneous phase with alm......（本文共 8311 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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