Compositions of fluorescent whitening agents
AssigneeCiba Specialty Chemicals Corporation
InventorsRobert Cockcroft, Ted Deisenroth, Peter Rohringer, Winfried Steffen
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Abstract
The invention relates to a composition comprising a) at least one water-soluble fluorescent whitening agent, b) a polymer formed from an ethylenically unsaturated monomer or monomer blend, characterized in that at least one monomer is acrylamide and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000, optionally, c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and d) water and the use of the composition for the fluorescent whitening of paper in coating and size press or film press applications.
Claims14
A composition comprising
- a) at least one water-soluble fluorescent whitening agent,
- b) a water-soluble polymer consisting of acrylamide only or acrylamide and other monomers, said monomers are selected from the group consisting of methacrylamide, N-alkyl acrylamides, N-alkyl methacrylamides, N-hydroxy acrylamides, N,N-dialkyl acrylamides, N,N-dialkyl methacrylamides, N,N-di(hydroxyalkyl) acrylamides, morpholino acrylamide, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, 2-acrylamido-2-methylpropane sulphonic acid, allyl sulphonic acid and vinyl sulphonic acid, whereby the acidic monomers are in the form of their free acid or water-soluble salts and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000, optionally,
- c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and
- d) water.
A composition comprising
- a) at least one water-soluble fluorescent whitening agent selected from a compound of the formula
- wherein
- R1, R2, R3 and R4 each, independently, represent —NH2, —OC1-C4alkyl, —Oaryl, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —N(C1-C4alkyl)(C1-C4hydroxyalkyl), —NHC1-C4hydroxyalkyl, —N(C1-C4hydroxyalkyl)2, or —NHaryl, whereby aryl is phenyl, which may be unsubstituted or substituted by one or two sulphonic acid groups, —COOH, —COOC1-C4alkyl, —CONH2, —CONHC1-C4alkyl or by —CON(C1-C4alkyl)2, a morpholino, piperidino or pyrrolidino residue, —SC1-C4alkyl or aryl, or an amino acid or amino acid amide residue from which a hydrogen atom has been abstracted from the amino group and
- M represents hydrogen, an alkaline or alkaline earth metal, ammonium or ammonium that is mono-, di-, tri- or tetrasubstituted by C1-C4alkyl or C2-C4hydroxyalkyl,
- b) water-soluble polymer consisting of acrylamide only or acrylamide and other monomers, said monomers are selected from the group consisting of methacrylamide, N-alkyl acrylamides, N-alkyl methacrylamides, N-hydroxy acrylamides, N,N-dialkyl acrylamides, N,N-dialkyl methacrylamides, N,N-di(hydroxyalkyl) acrylamides, morpholino acrylamide, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, 2-acrylamido-2-methylpropane sulphonic acid, allyl sulphonic acid and vinyl sulphonic acid, whereby the acidic monomers are in the form of their free acid or water-soluble salts, and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000,
- c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and
- d) water.
Dependencies are inferred from the claim text.