公开(公告)号：US20180030308A1

公开(公告)日：2018-02-01

申请号：US15727090

申请日：2017-10-06

申请人： Stepan Company

发明人： Thomas STEVENSON ,  James POOLE ,  Jackie HOWELL

IPC分类号： C09D167/03 ,  C08L67/00 ,  C08G63/127 ,  C09D5/03

CPC分类号： C09D167/03 ,  C08G63/02 ,  C08G63/127 ,  C08G63/91 ,  C08G2150/20 ,  C08L67/00 ,  C09D5/032 ,  C09D167/00 ,  C09D167/02

摘要： Thermosetting powdered coating compositions comprising (a) a high Acid Value carboxylic acid functional polyester resin having an Acid Value of at least 100 mg KOH/g and a functionality of at least 4.5, (b) a low Acid Value carboxylic acid functional polyester resin having an Acid Value of 20 to 50 mg KOH/g and a functionality of about 2.5 or less, and (c) a cross-linking agent. The high Acid Value polyester resin is the reaction product of a polycarboxylic acid or its anhydride reacted with a polyester polyol obtained from reacting 0 mol % to 100 mol % of isophthalic acid and/or 0 to 100 mol % terephthalic acid, or a mixture thereof, with a polyol mixture comprising at least one diol and at least one polyol having at least three hydroxyl groups. The thermosetting powdered coating compositions provide coatings with low gloss levels that can be adjusted from a gloss level of less than 1 to 40 or less, when measured at an angle of 60°, by varying the ratios of the high Acid Value and low Acid Value polyester resins in the composition.