Preparation and Properties of Polyurethane Plastic Runway Material Based on Bio-polyether
A solvent-free one-component polyurethane binder was prepared using bio-based 1,3-propanediol(PO3G),MDI-50,etc.The breathable polyurethane plastic track materials were prepared by mixing the binders with EPDM rubber particles.The effects of three polyether diols—PO3G,petroleum-based polyoxypropylene glycol(PPG)and polytetrahydrofuran glycol(PTMEG),and dosage of polyether triol 330N on the performance of PU binders and the plastic track materials were studied.The results showed that PO3G could completely replaced the petroleum-based polyether polyol PPG in preparing binder,and its viscosity was very close to PPG system.When the mass ratio of PO3G polyurethane adhesive and EPDM particle was 1/5,the tensile strength of the plastic track materias could reach 0.90 MPa,which was about 30%higher than that of PPG system,and the elongation at break reached 94%,far exceeding the national standard requirement of elongation at break greater than 40%.When 330N was used to replace part of PO3G,the prepared plastic truck material still had good mechanical properties.
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