UREA-ALDEHYDE POLYCONDENSATES, PROCESS FOR THEIR PREPARATION AND THEIR USE AS BINDERS IN LACQUER COATINGS

Urea-aldehyde polycondensates usable as surface coating binders are obtainable by step-wise reaction of (a) urea and/or urea derivatives with acidic CH aldehydes in a molar ratio of urea:aldehyde of 1:2 in the presence of acids and at from 60 DEG to 120 DEG C. with (b) a mixture of 3 moles of formal...

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Bibliographische Detailangaben
Hauptverfasser:	PETERSEN, HARRO, SCHMIDT, HORST, KASCH, HELLMUTH, FISCHER, KURT
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	Urea-aldehyde polycondensates usable as surface coating binders are obtainable by step-wise reaction of (a) urea and/or urea derivatives with acidic CH aldehydes in a molar ratio of urea:aldehyde of 1:2 in the presence of acids and at from 60 DEG to 120 DEG C. with (b) a mixture of 3 moles of formaldehyde per mole or urea and 3 moles of an acidic CH aldehyde per mole of urea at from 60 DEG to 120 DEG C. with subsequent removal of the water of reaction and treatment of the reaction mixture with an alkali metal alcoholate at from 80 DEG to 100 DEG C.