C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) C08G 18/32 (2006.01) C08G 18/42 (2006.01) C08G 18/72 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C08J 7/04 (2006.01) C09D 175/02 (2006.01) C09D 175/06 (2006.01)
Patent
CA 2435469
Disclosed is a polyurethane powder coating material, comprising: A) 3 - 25% by weight of at least one polyurea; B) 35 - 75% by weight of at least one amorphous or (semi)crystalline polyester polyol comprising polyol and polycarboxylic acid components and havimg an OH number of 5-250 mg KOH/g and a melting point of from 50 to 130°C; C) 5 - 30% by weight of at least one curing agent based on blocked polyisocyanates, isocyanurates or uretdiones having an NCO functionality of at least 2; D) 0.5 - 50% by weight of auxiliaries and additives; wherein the polycarboxylic acid component of the polyester polyol B) has a fraction of succinic acid or its anhydride of 0 to 15 mol% arid there are from 0.5 to 1.2 NCO groups of the curing agent C) available per OH group of the polyester polyol B). The coating material is useful for forming a coating film having a matt appearance.
Weiss Jorn Volker
Wenning Andreas
Degussa Ag
Fetherstonhaugh & Co.
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