Patent ID: 11866525
Assignee: ARCHROMA IP GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  D | IPC C  D

Claim 0:
1. A Method for preparation of an aqueous composition, optionally of a water-based latex binder, comprising emulsion polymerization of at least one ethylenically unsaturated monomer in the presence of at least one water-soluble diaminostilbene disulphonic optical brightener of formula (1), in which
R1 and R6 signify independently from each other hydrogen, linear or branched C1 to C4 alkyl, linear or branched C1 to C4 hydroxyalkyl, CH2CH2CONH2 or CH2CH2CN,
R2 and R4 signify independently from each other hydrogen, linear or branched C1 to C4 alkyl, linear or branched C1 to C4 hydroxyalkyl, CH2CO2M, CH2CH2CONH2 or CH2CH2CN,
R3 and R5 signify independently from each other linear or branched C1 to C4 alkyl, linear or branched C1 to C4 hydroxyalkyl, CH2CO2M, CH(CO2M)CH2CO2M, CH(CO2M)CH2CH2CO2M, benzyl or
R2 and R3 signify together with their neighbouring nitrogen atom a morpholino ring and/or
R4 and R5 signify together with their neighbouring nitrogen atom a morpholino ring,
R7 and R8 signify independently from each other hydrogen, linear or branched C1 to C4 alkyl
X and Y signify independently from each other CO2M or SO3M,
n and m signify independently from each other an integer selected from 0, 1 or 2, and
M signifies at least one cation for balancing anionic charge of the optical brightener and is selected from the group comprising or essentially consisting of hydrogen, an alkali metal cation, an alkaline earth metal cation, ammonium, ammonium which is mono-, di-, tri- or tetrasubstituted by a C1 to C4 linear or branched alkyl radical, ammonium which is mono-, di-, tri- or tetrasubstituted by a C1 to C4 linear or branched hydroxyalkyl radical, ammonium which is di-, tri-, or tetrasubstituted by a mixture of C1 to C4 linear or branched alkyl radical or C1 to C4 linear or branched hydroxyalkyl radical or mixtures of said cations.