Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2011-01-18
2011-01-18
Wu, David (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S437000, C525S445000, C525S440020, C525S446000, C525S449000, C525S453000, C525S454000
Reexamination Certificate
active
07872078
ABSTRACT:
The present invention is directed to curable film-forming compositions comprising:(a) a polymeric binder comprising a polyester having hydroxyl functional groups; and(b) a curing agent comprising a polyisocyanate having at least three isocyanate functional groups. In certain embodiments, after application to a substrate as a coating and after curing, the compositions demonstrate a Fisher microhardness of at least 120 at ambient temperatures of 15 to 25° C. and a softening point greater than or equal to 35° C. Additionally, in certain embodiments, after application to a substrate as a coating and after curing, the compositions demonstrate a 20° gloss recovery of at least 75% when subjected to the DRY ABRASION TEST METHOD.
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Foringer Lyle L.
Kondos Constantine A.
Olson Kurt G.
Sadvary Richard J.
Simpson Dennis A.
Diaz Robert A.
Hays Steven W.
Jones, Jr. Robert
Meyers Diane R.
PPG Industries Ohio Inc.
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