| 摘要 |
Hydrophilic polyurethanes containing at least 1.0 % by weight of olefinic double bonds (calculated as =C=C=) and containing from 20 to 80 % by weight of ethylene oxide units incorporated via polyethylene glycol, and which have been prepared by reacting
a) a polyisocyanate component,
b) a beta , gamma -ethylenically unsaturated ether alcohol component,
c) optionally a further formative component which is reactive towards isocyanate groups, and
d) a polyethylene glycol component,
with an NCO/OH equivalent ratio of from 0.7:1 to 1.2:1 being observed, the use thereof as emulsifiers for water-indispersible synthetic resins in the preparation of aqueous synthetic resin dispersions, a water-dispersible mixture of a synthetic resin of this type and a hydrophilic urethane of this type, and a coating composition which contains a mixture of this type as binder.
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