Air-drying polyurethane resins, their preparation and use

Details Air-drying polyurethane resins, their preparation and use Air-drying polyurethane resins, their preparation and use

C - Chemistry, Metallurgy

09

D

400/5503, 400/74

C09D 175/12 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/36 (2006.01) C08G 18/64 (2006.01) C09D 167/00 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2035513

139.172 AIR-DRYING POLYURETHANE RESINS THEIR PREPARATION AND USE ABSTRACT OF THE DISCLOSURE An aqueous coating composition containing at least one water- dispersible polyurethane resin containing air-drying groups and optionally further binder resins and conventional paint additives, which polyurethane resin contains structural units derived from (A) polyisocyanates, (B) polyols containing air-drying groups, (C) optionally polyols which are free of air drying groups, (D) compounds having at least two groups which are reactive with isocyanate groups and at least one group capable of anion formation. (E) optionally monoalcohols containing air-drying groups, (F) and / or compounds which differ from (B), (C), (D) and (E) and contain at least one group which is reactive with NCO groups. which has excellent pigment compatibility and the coatings produced therefrom have good corrosion protection and good mechanical pro- perties even in the absence of siccatives.

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