C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 12/40 (2006.01) B01F 17/52 (2006.01) C04B 24/22 (2006.01) C08G 12/32 (2006.01) C08L 61/32 (2006.01)
Patent
CA 2170074
The invention concerns highly viscous condensation products containing sulfonic acid groups based on amino- s-triazines with at least 2 amino groups and formaldehyde which have a viscosity of 500 to 100 000 cp at 20°C and a pH value of 8.0 to 13.0 as aqueous solutions with a solids content of 20 % by weight and are obtainable by a) condensation of amino-s-triazine, formaldehyde and sulfite in a molar ratio of 1 : 1.9 to 2.9 : 0.7 to 1.3 in aqueous solution at a pH value of 9.0 to 12.0 and a temperature of 50 to 90°C until the sulfite is no longer detectable and b) subsequent further condensation at a pH value of 2.0 to 5.0 and a temperature of 50 to 100°C until the viscosity exhibits the desired value.
Kern Alfred
Weichmann Josef
Winkelmann Herbert
Wolfertstetter Franz
Skw Trostberg Aktiengesellschaft
Swabey Ogilvy Renault
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