C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/62 (2006.01) C08G 18/48 (2006.01) C08G 18/67 (2006.01) C08G 18/81 (2006.01) C08J 3/03 (2006.01) C08L 75/14 (2006.01) C08L 101/00 (2006.01)
Patent
CA 2061442
Mo-3681 LeA 28,230 HYDROPHILIC, OLEFINICALLY UNSATURATED POLYURETHANES AND THEIR USE AS REACTIVE EMULSIFIERS ABSTRACT OF THE DISCLOSURE The present invention relates to hydrophilic polyurethanes having a content of (i) olefinic double bonds (expressed as C=C, molecular weight 24) of at least 1.0% by weight and (ii) ethylene oxide units incorporated through polyethylene glycol of 20 to 80% by weight, which are based on the reaction product of a) 1.0 mole of a polyisocyanate component consisting of at least one organic polyisocyanate with b) 0.3 to 2.5 moles of at least one .beta.,.gamma.-ethylenically unsaturated ether alcohol containing 5 to 29 carbon atoms, c) 0 to 1.0 mole of at least one synthesis component containing at least two isocyanate-reactive groups and having a molecular weight of 62 to 2,000 and d) 0.25 to 0.85 moles of a polyethylene glycol component containing at least one polyethylene glycol having a molecular weight of 1,300 to 5,000, at an NCO/OH equivalent ratio, based on starting components a) to d), of 0.7:1 to 1.2:1. The present invention also relates to a water-dispersible coating composition based on a mixture of radical-curable synthetic resins containing unsaturated groups wherein the mixture contains A) 50 to 95 parts by weight of at least one non-water-dispersible synthetic resin containing unsaturated groups and having a molecular weight (Mn of 500 to 10,000 and B) .5 to 95 parts by weight of a polyurethane component which possesses sufficient hydrophilicity to ensure the disperslbility of the mixture in water and which contains at least one of the previously mentioned hydrophilic polyurethanes.
Kremer Wolfgang
Meixner Juergen
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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