Appeal No. 1996-3560
Application No. 08/432,560
Claims 5 is illustrative of appellants’ invention and is
reproduced below.
5. A water-borne coating composition containing an
emulsifier comprising a member selected from the group
consisting of ammonium salts of monosulfuric acid esters of
adducts prepared by the ethoxylation of long chain alcohols or
substituted phenols with ethylene oxide at a molar ratio of
1:2 to 1:100 and a binder which comprises a mixture of
(a) a polyol component which is dispersed in water or a
water/solvent mixture and comprises at least one polymer
prepared by the emulsion polymerization of olefinically
unsaturated monomers in the presence of 0.1 to 10% by weight,
based on the total amount of monomers, of said emulsifier and
having a molecular weight (M ) of 500 to 100,000, at least two
n
alcoholic hydroxyl groups per molecule, a hydroxyl value of 15
to 250 mg KOH/g, an acid value of 0 to 7 mg KOH/g, and a total
content of sulfonate and carboxylate groups of 0 to 4.5
milliequivalents per 100 g of solid resin and
(b) a polyisocyanate component which is emulsified in
the dispersion of polyol component (a), has a viscosity at
23°C of 50 to 10,000 mPaCs and an average NCO functionality of
1.8 to 4.2, and contains 12.0 to 21.5% by weight of
(cyclo)aliphatically bound isocyanate groups and, optionally,
2 to 20% by weight of ethylene oxide units present within
polyether chains, the polyether chains containing an average
of 5 to 70 ethylene oxide units,
wherein the components are present in quantities corresponding
to an equivalent ratio of isocyanate groups of component (b)
to alcoholic hydroxyl groups of component (a) of 0.2:1 to 5:1.
THE REFERENCES
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