Low VOC waterborne primer with high film smoothness

Details Low VOC waterborne primer with high film smoothness Low VOC waterborne primer with high film smoothness

2007-11-20

2007-11-20

Niland, Patrick (Department: 1714)

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...

C427S372200, C427S385500, C427S388300, C427S388400, C427S407100, C427S416000, C428S423100, C524S539000, C524S589000, C524S590000, C524S591000, C524S839000, C524S840000, C524S457000, C525S123000, C525S127000, C525S455000, C525S456000

Reexamination Certificate

active

10843105

ABSTRACT:
An aqueous thermosetting primer composition includes a polyurethane polymer, an acrylic polymer polymerized in a wax having crosslinkable functionality, and a crosslinking component that is reactive with the wax and at least one of the polyurethane polymer and the acrylic polymer. The polyurethane polymer has a glass transition temperature of 0° C. or less. The acrylic polymer has a glass transition temperature that is at least about 20° C. higher than the glass transition temperature of polyurethane resin. The invention further provides a composite coating having as a primer layer a cured layer of the primer composition of the invention and having at least one topcoat layer.

REFERENCES:
patent: 6437036 (2002-08-01), Gessner et al.
patent: 6541594 (2003-04-01), Ohrbom et al.

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