Hydrophobic light stable polyurethane elastomer with improved mechanical properties
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United States of America Patent
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Aug 24, 2004
Grant Date -
N/A
app pub date -
Dec 29, 1999
filing date -
Dec 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hydrophobic polyurethane elastomer is disclosed comprising an isocyanate terminated prepolymer having an isocyanate content ranging from 4 to 12 wt. % NCO comprising the reaction product of: i) an OH terminated homopolymer of butadiene having molecular weight ranging from 1000 to 4000 and an OH functionality of from 1.9 to 2.1; ii) an aliphatic or cycloaliphatic diisocyanate; and a diol chain extender having a molecular weight ranging from 62 to 400.
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