VERFAHREN ZUR HERSTELLUNG VON LOESUNGEN HAERTBARER HARNSTOFF-FORMALDEHYDHARZE FUER DIE TRAENKUNG UND BESCHICHTUNG VON TRAEGERBAHNEN ZUR OBERFLAECHENVERGUETUNG VON HOLZWERKSTOFFPLATTEN

The invention provides a process for preparing solutions of curable aminosulphonic acid-modified urea- formaldehyde resins. These solutions are prepared according to a known process modified by adding, in the initial reaction stage, 1-10 wt%, based on resin solids of an emulsion or suspension of a p...

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Bibliographische Detailangaben
Hauptverfasser:	HOLTSCHMIDT,ULRICH,DR, SCHAMBERG,ECKEHARD,DR, LAQUA,ARNOLD,DR, HELLWIG,DIETER
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS IMPREGNATING OR COATING OF PAPER MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	The invention provides a process for preparing solutions of curable aminosulphonic acid-modified urea- formaldehyde resins. These solutions are prepared according to a known process modified by adding, in the initial reaction stage, 1-10 wt%, based on resin solids of an emulsion or suspension of a polymer derived from monomers of formula wherein R is H or CH , R is O, R is OH, NH2, OCnH2n+1, OCmH2mOH or OCmH2mOCnH2n+1, wherein m is an integer from 1 to 6 and n is an integer from 1 to 4, or R and R conjointly are N. The solution formed by this process is suitable for impregnating and coating carrier webs, the resin then being cured. Such treated carrier webs are particularly useful for application to a surface of a wood-based sheet in, for example, a quick-cycling press or a multi-daylight press resulting in improvement in properties of the surface of the wood-based sheet.