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
2006-12-12
2006-12-12
Zimmer, Marc S. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C428S413000, C428S522000, C525S934000
Reexamination Certificate
active
07148295
ABSTRACT:
The invention relates to the use of special mixtures of at least two polycarboxylic acids as crosslinker components for thermally curing powder-lacquer binding agents having groups that are capable of reacting with carboxyl groups. The mixtures include at least two polycarboxylic acids each melting above 95° C. and having up to 20 carbon atoms and consist of at least 5 wt. %, of the polycarboxylic acid with the lowest melting point and at least 10 wt. %, of the polycarboxylic acid with the highest melting point of all polycarboxylic acids present in the mixture to at least 5 wt. %. Additionally, the polycarboxylic acid mixture is a solid below 40° C. and a liquid above 160° C.
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“Dodencanedioic Acid (DDDA) HOOC(CH2)10COOH Curing Agent Applications in Acrylic Powder Coatings”.
Grahl Michael
Gürtler Christoph
Halpaap Reinhard
Laas Hans-Josef
Rawlins James
Bayer Materialscience AG
Gil Joseph C.
Roy Thomas W.
Zimmer Marc S.
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