Solid polymer binders for thermosetting powder coating...

C - Chemistry – Metallurgy – 08 – G

Patent

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402/133, 117/52

C08G 18/32 (2006.01) B32B 15/08 (2006.01) C08G 18/58 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1200345

Abstract of the disclosure: A solid polymer binder for thermosetting powder coating compositions, obtained by combining A) a polyurethane pre- polymer containing carboxyl groups and derived from poly- isocyanates, hydroxycarboxylic acids and blocking agents, containing 1 to 40 % by weight of blocked isocyanate groups and having an acid number of 1 to 200, with B) at least one homo- and/or heterofunctional compound which either contains hydroxyl groups or is capable of forming them by reaction, a thermosetting powder composition containing such binder, a metal object coated with such thermosetting powder coating composition, and a process for the manufacture of coatings on metal substrates with such powder coating composition.

393700

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