C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/12 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/38 (2006.01) C08G 18/66 (2006.01) C09D 175/08 (2006.01) C09D 175/12 (2006.01) C09J 175/12 (2006.01)
Patent
CA 2307367
The present invention relates to aqueous compositions containing a mixture of a) 50 to 95% by weight, based on the resin solids content of components a) and b), of an aqueous polyurethane/urea dispersion containing 0.5 to 6% by weight, based on the weight of the polyurethane/ureas, of alkoxysilane groups (calculated as Si, MW 28) and b) 5 to 50% by weight, based on the resin solids content of components a) and b), of a water reducible oligomer which is substantially free from isocyanate groups and has an alkoxysilane group content (calculated as Si, MW 28) of 1 to 6% by weight, based on the weight of the oligomer, and wherein the alkoxysilane groups are incorporated as the reaction product of I) a polyisocyanate component having a minimum average functionality of 2.4 and containing at least 50% by weight of polyisocyanate adducts and II) a compound containing amino and alkoxysilane groups. The present invention also relates to coatings, sealants and adhesives prepared from these aqueous compositions.
Gindin Lyubov K.
Roesler Richard R.
Corporation Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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