Synthesis and Properties of Polyester-Polyether Mixed Soft Segment Type Polyurethane Resin
The solvent polyurethane resin was synthesized with poly neopentyl adipate glycol (PNA) and polypropylene glycol (PPG) as the mixed soft segments,toluene diisocyanate(TDI),isophoronediisocyanate(IPDI),isophoronediamine(IPDA) and dibutylamine as the hard segments.The effect of mass ratio of PNA/PPG,content of hard segment on the mechanical property,water resistance,thermostability and properties of printing ink were discussed.The result showed that the increase of mass ratio of PNA/PPG or content of hard segment would make the elongation decrease,but the tensile strength and thermostability increase;however the trend of water absorption was the opposite.When the PNMPPG mass ratio was 1∶1,the content of hard segment was 28.19％,the PU resin would have good comprehensive performance,and the index of ink prepared with it could meet the industry standard.
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维普
