Polyurethane thickeners for aqueous systems

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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Details

C106S031010, C106S031130, C106S031570, C106S031580, C106S031590, C523S160000, C523S161000, C524S591000, C524S839000, C524S840000

Reexamination Certificate

active

10670808

ABSTRACT:
The invention provides for thickeners for inks and coating materials, comprising polyurethanes, water, viscosity regulators, and, if desired, organic solvents, wherein said viscosity regulators comprise compounds of the general formula (I)in-line-formulae description="In-line Formulae" end="lead"?R1—O—(SO)a—(EO)b—(PO)c—(BO)d-(DTO)e—R2in-line-formulae description="In-line Formulae" end="tail"?in whichR1and R2independently of one another are one of the radicals from the group consisting of hydrogen, an aliphatic or cycloaliphatic hydrocarbon radical which optionally is substituted and/or contains multiple bonds and/or contains heteroatoms, an aromatic radical which optionally is substituted and/or contains heteroatoms, an acyl radical, a carboxyacyl radical, and a carboxyalkyl radical,a=1 to 5,b=3 to 30,c=0 to 5,d=0 to 5, ande=0 to 5where (a+c+d+e)<=b.

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