Water soluble phenolic resole-urea composition
A water soluble phenolic resole-urea composition useful as a binder which remains infinitely water-dilutable and free of sediment after one month of storage at 0 DEG C and is made by the reaction of urea with the free formaldehyde in a phenolic resole under acid conditions, followed by the further a...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A water soluble phenolic resole-urea composition useful as a binder which remains infinitely water-dilutable and free of sediment after one month of storage at 0 DEG C and is made by the reaction of urea with the free formaldehyde in a phenolic resole under acid conditions, followed by the further addition of urea at neutral or slightly basic conditions. |
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