Synthesis and Application of Water-Borne Linear Polyester-Ether-Urethane

Abstract

The water-borne linear polyester-ether-urethane with alternating polyester and polyether as soft segment was synthesized by pre-polymerization and blocking reaction. The chemical structure of polyester-ether-urethane was characterized by FTIR and was proved no chemical crosslinking by dissolution experiments of N,N-dimethylformamide. The water dispersion and solubilization were analyzed by solid content, emulsion stability, surface tension and viscosity of hybrid latex. The results showed that the emulsion of polyester-etherurethane with methyl diphenylene diisocyanate as hard block was the most stable and its maximum solid content was 6.5 %, the surface tension of water was reduced obviously by the polyester-ether-urethane emulsion, when the mass per cent of the polyester-ether-urethane, emulsion and the emulsion of polyester-urethane admixture was 8 %, polyether-urethane and polyester-urethane mass ratio of 1:1.