C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4302, 400/55
C08L 75/00 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08L 75/08 (2006.01) C14C 9/00 (2006.01) C14C 11/00 (2006.01)
Patent
CA 2035355
O.Z. 0050/41384 Abstract of the Disclosure: Aqueous polyurethane formu- lations contain from 10 to 60% by weight of one or more polyurethanes A which are composed of a) one or more organic diisocyanates or a mixture of organic isocyanates which has an arithmetic mean NCO functionality of from 1.9 to 2.3 [monomers I], b) one or more dihydric polyether alcohols having a number average molecular weight of from 500 to 5,000 or a mixture of polyetheralcohol which has an arithmetic mean functionality of alcoholic OH groups of 1.6 to 2.3 and a number average molecular weight of from 500 to 5,000 [monomers II], c) one or more alcohols containing from 1 to 3 al- coholic OH groups and not less than one ionic group [monomers III], d) no dihydric alcohols or one or more dihydric alco- hols having a number average molecular weight of from 62 to 499 or a mixture of alcohols which has an arithmetic mean functionality of alcoholic OH groups of from 1.9 to 2.3 and a number average molecular weight of from 62 to 499 [monomers IV], e) no monohydric polyetheralcohols or one or more polyetheraloohols [monomers V] and f) one or more polyamines having not less than two -N-H groups or no such polyamines [monomers VI], with the proviso that the amounts of incorporated mono- mers I to VI are such that the ratios of the number of equivalents of OH to that of NCO are from 0.2 to 0.6 for the incorporated monomers II/monomers I from 0.2 to 0.8 for the incorporated monomers III/mono- mers I, from 0 to 0.2 for the incorporated monomers IV/monomers I and from 0 to 0.2 for the incorporated monomers V/monomers I and the ratio of the number of equivalents of -N-H to that of NCO is O.Z. 0050/41384 from 0 to 0.1 for the incorporated monomers VI/monomers I, that the arithmetic mean functionality of all the mono- mers I to V incorporated is from 1.8 to 2.3, averaged over the sum of the NCO groups of the monomers I and the alcoholic OH groups of the monomers II to V, that the ratio of the number of equivalents of NCO to that of (OH+-N-H) for the incorporated monomers I, the OH groups for the incorporated monomers II to V and the -N-H groups of the incorporated monomers VI is from 0.9 to 1.0 and, where monomers VI are simultaneously incorporated, the ratio of the number of equivalents of NCO to that of OH for the incorporated monomers I and the sum of the incorporated monomer II to V is greater than 1, that the monomers II have a degree of ethoxylation of less than 30% by weight, that the monomers V have a degree of ethoxylation of not less than 40% by weight and that from 0.05 to 0.2 mmol of the ionic groups of the incorporated monomers III are present in ionized form per gram of polyurethane A in the aqueous formulation. These aqueous polyurethane formulations are suitable as a bottoming coat for finishes on leathers which have been fatliquored and/or rendered water repellant.
Haeberle Karl
Treiber Reinhard
Weyland Peter
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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