B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
402/135, 117/195
B32B 27/40 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01)
Patent
CA 1161188
ABSTRACT OF THE DISCLOSURE The present invention relates to moisture-hardening one-component lacquers having improved shelf life and thermal stability. These lacquers are characterized by high gloss and high flexural strength and are based on reaction products containing free isocyanate groups of rel- atively high molecular weight polyols having an average functionality of from 2 to 3, polyisocyanates and, option- ally, low molecular weight polyhydroxyl compounds which are characterized in that the relatively high molecular weight polyol is a mixture of: (a) a hydroxyl polyester having an average molecular weight of from about 500 to 6000, (b) a hydroxyl polyether corresponding to the follow- ing general formula: Image R1 represents hydrogen, a C1-C4 alkyl radical or-a phenyl radical, X represents one of the difunctional radicals -S-, -O-, -SO2-, -CO- or -C(R2R3)- where R2 and R3, which may be the same or different, represent hydrogen or a C1-C4 alkyl radical, and n and m each represent an integer of >0, the value of (n+m) being selected in such a way that the hydroxyl polyether has an average molecular weight of from about 300 to 1200, preferably from about 350 to 800, and optionally, (c) another polyether polyol having a molecular weight of from about 500 to 6000, component (b) making up from about 3 to 30% by weight, preferably from about 4 to 20% by weight and component (c) from about Mo-2052 LeA 19,405 0 to 5% by weight, preferably from about 0.5 to 3% by weight of the total quantity of the relatively high molecular weight polyol. The present invention also relates to processes for the coating of substrates, particularly leather, and the coated substrates produced therefrom.
345885
Noll Klaus
Pedain Josef
Schmid Rosemarie
Speicher Wolfgang
Aktiengesellschaft Bayer
Swabey Mitchell
LandOfFree
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