Scorch resistant additives for polyurethane foams
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Jun 11, 1997
filing date -
Jun 11, 1997
priority date (Note) -
Expired
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Abstract
Polyester polyols which contain at least one dihydrazide linkage --C(.dbd.O)--NHNH--C(.dbd.O)-- reduce the incidence of scorching when used as a reactant in the manufacture of polyurethane foam. Also disclosed are compounds of structures (2) and (3): D--HN(--NH--C(.dbd.O)--R--C(.dbd.O)NH).sub.0-1 --NH--D (2) (A--C(.dbd.T)--NH)--.sub.2 (3)
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