Aqueous modified urea resin mixture, method for producing and use of same to saturate absorbent carriers and compound material produced using the urea resin material

• Main Author: LUNKWITZ, RALPH
• Format: Patent
• Language: English; French; German
• Published: 18.01.2012
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Aqueous urea resin mixture comprises a resin (40-70 wt.% based on the aqueous urea resin mixture) comprising urea and formaldehyde in a molar ratio of 1:1.3- 1:2, polyethylene glycol with an average molecular weight of 200-1500, and optionally a component (M) comprising diethylene glycol, glycerin or caprolactam. Independent claims are also included for: (1) preparing the aqueous urea resin mixture comprising reacting urea and formaldehyde in a molar ratio of 1:1.3- 1:2 in an aqueous medium of pH 4-8, at 60-110[deg] C, and adding the mixture with polyethylene glycol and optionally the component (M); (2) an impregnate obtainable by treating an absorbent material with the aqueous urea resin mixture and then drying; (3) producing a composite material comprising applying the impregnate on a support material under heat and pressure; and (4) the composite material obtained by the above method. Wässrige Harnstoffharzmischung mit einem Gehalt an Harz im Bereich von 40 bis 70 Gew.-% bezogen auf die wässrige Harnstoffharzmischung, wobei im Harz Harnstoff und Formaldehyd in einem Molverhältnis von 1 : 1,3 bis 1 : 2,0 vorliegen und das Harz 1 bis 5 Gew.-% bezogen auf die wässrige Harnstoffharzmischung Polyethylenglykol mit einer mittleren Molmasse von 200 bis 1500, und gegebenenfalls eine Komponente M, ausgewählt aus der Gruppe bestehend aus M1) Diethylenglykol, M2) Glyzerin und M3) Caprolactam, enthält.