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US 4,234,693 AGranted
Process for making polyurea foams utilizing imidazole catalysts
AssigneeImperial Chemical Industries PLC
InventorAlan M. Wooler
Life of this patent
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Abstract
A process for the manufacture of polyurea foams which comprises reacting an organic polyisocyanate with at least a chemically equivalent amount of water in the presence of an imidazole compound.
Claims8
A process for the manufacture of polyurea foams which comprises reacting an organic polyisocyanate with from 1 to 10 times the chemically equivalent amount of water in the presence of from 0.5 to 10% by weight, based on the weight of organic polyisocyanate, of an imidazole compound of the formula:
- ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represents hydrogen or lower alkyl.
Dependencies are inferred from the claim text.