D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/30 (2006.01) D21H 19/42 (2006.01)
Patent
CA 2378045
The use of whitening pigments comprising (a) a melamine-formaldehyde or phenol- formaldehyde polycondensation product and (b) a water-soluble fluorescent whitening agent of formula (1), wherein R1 and R2 are each independently of the other -OH, -Cl, -NH2, -O-C1-C4alkyl, -O-aryl, -NH-C1-C4alkyl, -N(C1- C4alkyl)2, -N(C1-C4alkyl)(C1-C4hydroxyalkyl), -N(C1-C4hydroxyalkyl)2 or -NH- aryl, for example anilino, aniline-mono- or -di-sulfonic acid or an anilinesulfon-amide, morpholino, S-C1-C4alkyl(aryl), or a radical of an amino acid, for example aspartic acid or iminoacetic acid, which radical is substituted at the amino group, and M is hydrogen; sodium; potassium; calcium; magnesium; ammonium; mono-, di-, tri- or tetra-C1-C4alkylammonium; mono-, di- or tri-C1-C4hydroxyalkylammonium; or ammonium di- or tri-substituted by a mixture of C1-C4alkyl and C1-C4hydroxyalkyl groups, for whitening paper coating compositions.
L'invention concerne l'utilisation de pigments blanchissants dans le blanchissement de compositions de couchage du papier, lesdits pigments comprenant (a) un polycondensat à base d'aldéhyde formique de mélamine ou de phénol-formaldéhyde et (b) un agent blanchissant fluorescent correspondant à la formule (1), dans laquelle R¿1? et R¿2? représentent, de manière indépendante l'un de l'autre, -OH, -Cl, -NH¿2?, -O-C¿1?-C¿4? alkyle, -O-aryle, -NH-C¿1?-C¿4? alkyle, -N(C¿1?-C¿4? alkyle)¿2?, -N(C¿1?-C¿4? alkyle)(C¿1?-C¿4? hydroxyalkyle), N(C¿1?-C¿4? hydroxyalkyle)¿2? ou NH-aryle, tels qu'anilino, l'acide aniline-monosulfonique ou disulfonique ou une aniline sulfonamide, morpholino, S-C¿1?-C¿4? alkyl(aryl), ou un radical d'un acide aminé, tel que l'acide aspartique ou l'acide iminoacétique, ledit radical étant substitué au niveau du groupe amino ; et M représente un groupe hydrogène, sodium, potassium, calcium, magnésium, ammonium, mono-, di-, tri- ou tétra-C¿1?-C¿4? alkylammonium, mono-, di- ou tri-C¿1?-C¿4? hydroxyalkylammonium; ou ammonium di- ou tri-substitué par un mélange de groupes alkyle en C¿1?-C¿4? et hydroxyalkyle en C¿1?-C¿4?.
Grienenberger Marc Roger
Ohren Stefan
Rohringer Peter
Wockenfuss Bernd
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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