In this study, analyzed the changes occurred after adding casein emulsions to water - dispersed polyurethane using polypropylene glycol (PPG). For this purpose, anionic water - dispersed polyurethane containing PPG, IPDI and DMPA and casein emulsion prepared by dissolving casein in distilled water using ammonia water were prepared. As a result of measuring the alkali resistance by using the prepared resin, there was no change in the physical properties. The tensile strength of the sample having a high casein content was measured to be 2.227 kgf / ㎟. Elongation was measured at 474% for samples containing less casein and The abrasion resistance was measured as 46.090 ㎎.loss of sample containing much casein as a result of the surface roughness measurement.

Abstract
 1. Introduction
 2. Experiment
  2.1. Material
  2.2. Analytical instrument
  2.3. Anion water dispersion polyurethane/ casein emulsion synthesis
 3. Results and Discussion
  3.1. FT-IR analysis
  3.2. Mechanical properties measurementanalysis
 4. Conclusion
 References

• Lee Joo-Youb(Department of Renewable Energy Engineering, Jungwon University) Corresponding author