High performance coatings
AssigneeResinate Materials Group, Inc.
InventorsGary Spilman, Michael Christy, Eric Vrabel, Gage Fryz, Rick Tabor, Brian T. Comstock-Reid
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Abstract
The present invention relates to coatings, particularly high performance coatings, containing a polyester polyol comprising recurring units derived from a polyacid source, poly(bisphenol-A carbonate) (PBAC), and a glycol. The PBAC is preferably recycled poly(bisphenol-A carbonate) (rPBAC). These coatings provide improved salt spray and stain resistance along with a variety of other coating performance attributes. The polyols can contain a significant recycle and biobased content, making them sustainable alternatives to petroleum based polyols.
Claims20
A coating comprising the reaction product of:
- (a) a polyester polyol;
- and
- (b) a crosslinker selected from a melamine crosslinker, or an isocyanate crosslinker selected from a diisocyanate trimer, a diisocyanate, or a polyisocyanate, wherein the polyester polyol comprises recurring units derived from:
- (i) 31 to 34 wt % of a polyacid source selected from polyethylene terephthalate (PET), recycled polyethylene terephthalate (rPET) or combinations thereof;
- (ii) 7 to 8 wt % isophthalic acid;
- (iii) 20 to 25 wt % of an acid selected from succinic acid or adipic acid;
- (iv) 22 to 24 wt % of glycols comprising a mixture of neopentyl glycol, propylene glycol and glycerol;
- and
- (v) 12 to 20 wt % of a poly(bisphenol-A carbonate) (PBAC), wherein when the coating comprises a melamine crosslinker the coating is formulated to comprise 10 to 30 wt % of the melamine crosslinker and when the coating comprises an isocyanate crosslinker the coating is formulated at an isocyanate to hydroxyl ratio from 1.0 to 1.5, and the coating comprises 1 to 95 wt % of the polyester polyol.
Dependencies are inferred from the claim text.