C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
117/195, 400/551
C08F 2/30 (2006.01) C08F 283/00 (2006.01) C08L 57/00 (2006.01) C08L 75/04 (2006.01) C09D 157/00 (2006.01) C09D 175/04 (2006.01)
Patent
CA 1337729
Aqueous polymer dispersions useful for coating substrates are prepared by polymerization of olefinically unsaturated monomers in aqueous medium in the presence of radical formers and hydrophilically modified, urethane-group-containing emulsifiers having an average molecular weight below 30,000, wherein the urethane-group-containing emulsifiers are oligourethanes having a branched molecular structure which (i) are produced from organic polyisocyanates and organic compounds containing isocyanate-reactive groups with the reactants containing hydrophilic groups or groups convertible into hydrophilic groups and which are monofunctional or difunctional to isocyanate addition reaction, with the molar ratio of monofunctional hydrophilic components to the corresponding difunctional components being at least 2:1, and which (ii) have a content of chemically incorporated hydrophilic groups sufficient to impart the oligourethane solubility or dispersibility in water, with the proviso that, on a statistical average, at least 2.2 terminally incorporated hydrophilic groups are present per molecule.
591964
Bomer Bruno
Pedain Josef
Probst Joachim
Schmidt Adolf
Wieczorrek Wolfhart
Aktiengesellschaft Bayer
Bomer Bruno
Fetherstonhaugh & Co.
Pedain Josef
Probst Joachim
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