Polyurethane composite material and application
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United States of America Patent
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Issued Date -
Dec 25, 2008
app pub date -
Jun 20, 2007
filing date -
Jun 20, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention discloses a Polyurethane (PU) composite material comprising a thermoplastic polyurethane and a filler. The thermoplastic polyurethane comprises a linear polyurethane main-chain, and the polyurethane main-chain comprises a soft segment and a hard segment. The hard segment of the polyurethane main-chain is formed by a diisocyanate and a chain extender, and the soft segment of the polyurethane main-chain is formed by a polyol. The present invention also teaches the application of the disclosed thermoplastic polyurethane composite material in dental root canal material.
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