C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/00 (2006.01) C08L 67/02 (2006.01) C09D 133/06 (2006.01) C08L 63/00 (2006.01) C08L 67/00 (2006.01)
Patent
CA 2170325
Coating powder compositions comprise A) between about 60 and about 90 wt%, relative to total weight of A) plus B) plus C), of an acrylic polymer having a weight average molecular weight of between about 1000 and about 30,000, a carboxylic acid equivalent weight of from about 300 to about 1000 and a glass transition temperature of about 45°C or above and B) between about 5 and about 30 wt%, relative to total weight of A) plus B) plus C) of an adduct prepared from i) between about 20 and about 50 wt%, relative to total weight of i) plus ii), of a curing agent reactive with carboxylic acid groups and ii) between about 50 and about 80 wt%, relative to total weight of i) plus ii), of a polyester resin formed primarily from linear aliphatic diols and dicarboxylic acids, the polyester having functional groups reactive with said curing agent i), and C) between about 2 and about 30 wt% relative to the total weight of A) plus B) plus C) of a curing agent reactive with carboxylic acid groups. The sum of un-reacted functional groups of adduct B) plus curing agent C) is at a stoichiometric equivalent relative to said carboxylic acid functionality of said acrylic polymer A) of between about 0.5 and about 1.5.
Decker Owen H.
Tarnoski Charles P.
Gowling Lafleur Henderson Llp
Rohm And Haas Chemicals Llc
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