Patent ID: 6025030
Filing Date: 2000-02-15
Classification: C08L,C09D

Abstract:
A method of providing a coating on wood comprising, applying to said wood a coating powder of composition consisting essentially ofA) 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 500 to about 1000 and a glass transition temperature of about 45.degree. C. or above,B) between about 5 and about 30 wt %, relative to total weight of A) plus B) plus C) of an adduct prepared fromi) between about 20 and about 50 wt %, relative to total weight of i) plus ii), of a polyepoxy compound or a poly (beta-hydroxyalkyl amide) compound, andii) between about 50 and about 80 wt %, relative to total weight of i) plus ii), of a carboxylic acid-functional polyester resin, said polyester resin being the condensation product of polyols and polycarboxylic acids, said polyols are linear aliphatic diols and said polycarboxylic acids are linear aliphatic dicarboxylic acids,C) between about 2 and about 30 wt %, relative of the total weight of A) plus B) plus C) of a polyepoxy compound or a poly (beta-hydroxyalkyl amide) compound; the combination of said adduct B) and C) having un-reacted functional groups of component i) plus C) of a stoichiometric equivalent relative to said carboxylic acid functionality of said acrylic polymer A) of between about 0.5 and about 1.5, andD) cure catalyst in an amount sufficient that said composition cures at about 300.degree. F. (149.degree. C.) or below for 30 min.,fusing said coating powder on said wood, andcuring said coating powder.