POLYUREA PREPOLYMERS
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United States of America Patent
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Issued Date -
Aug 11, 2016
app pub date -
Feb 9, 2016
filing date -
Feb 9, 2015
priority date (Note) -
Abandoned
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Abstract
Novel polyurea prepolymer and quasi-prepolymer compositions are contemplated, the compositions being the reaction products of an isocyanate component and a secondary diamine component. Specifically, a an isocyanate component comprising uretonimine-modified 4,4′ methylene diphenyl diisocyanates are reacted with various polyamines to form prepolymers or quasi-prepolymers. The isocyanate component may additionally comprise one or more other isocyanates, including pure MDI, aliphatic HDI trimer, HDI allophanate, and aliphatic HDI biuret.
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