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Use of an aqueous solution of a sulfurous acid salt of primary, secondary or tertiary aliphatic or cycloaliphatic alkanol amines or morphaline as latent curing agent for aminoplast resins
Use of an aqueous solution of a sulfurous acid salt of primary, secondary or tertiary aliphatic or cycloaliphatic alkanol amines or morphaline as latent curing agent for aminoplast resins