C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 61/24 (2006.01) C08J 3/03 (2006.01) D21H 17/49 (2006.01) D21H 17/50 (2006.01) D21H 19/42 (2006.01) D21H 21/52 (2006.01)
Patent
CA 2046251
K-18145/A Aqueous dispersions of urea/formaldehyde polymers and the use thereof Abstract of the Disclosure Aqueous dispersions comprising 15-35 % by weight of a urea/formaldehyde polymer (UF polymer), said dispersions having - a formaldehyde:urea (F:U) ratio of (1.25-1.40):1, - a content of free formaldehyde of less than 0.1 % by weight, - a specific surface area of 5-30 m2/g, - a pore volume of 2-4 cm3/g, - a mean particle size of 0.05-1 µm, and - a mean agglomerate size of 3-10 µm, are especially suitable for use as white pigments in paper manufacture.
Kramer Klaus
Renner Alfred
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Kramer Klaus
Renner Alfred
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