Aqueous polyurethane coating compositions

Details Aqueous polyurethane coating compositions Aqueous polyurethane coating compositions

2008-04-15

2008-04-15

Peng, Kuo-Liang (Department: 1796)

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...

C525S123000, C524S589000

Reexamination Certificate

active

10398384

ABSTRACT:
An aqueous coating composition comprising a crosslinkable water-dispersible polyurethane oligomer wherein said composition when drying to form a coating has an open time of at least 20 minutes, a wet-edge time of at least 10 minutes, a tack free time of <20 hours and an equilibrium viscosity of <5,000 Pa·s at a solids content when drying in the range of from 20 to 55 wt % using a shear rate in the range of from 9±0.5 to 90±5 s−1and at 23+2° C.

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