Preparation of aqueous ketone resin or ketone/aldehyde resin dispersions, and production of surface-coating binders
AssigneeBASF SE
InventorsKurt Fischer, Harro Petersen, Hellmuth Kasch, Eckehardt Wistuba
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Abstract
A process for the preparation of a stable aqeuous ketone resin or ketone/aldehyde resin dispersions and a process for the production of surface coating binders. For this purpose, a melt or a highly concentrated solution of the ketone resin or ketone/aldehyde resin is dispersed in water in the presence of an organic protective colloid. These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
Claims6
A process for the preparation of a stable aqueous dispersion of a ketone resin, wherein a melt or an about 75 to 95% strength solution of the ketone resin, which ketone resin is an alkali-catalyzed self-condensate of cyclohexanone or its derivatives, is dispersed in water by agitating the resin-water mixture in the presence of at least one copolymer selected from the group consisting of a copolymer of a vinyl lactam and a vinyl ester, and a carboxyl-containing (meth)acrylate copolymer, some or all of whose carboxyl groups are neutralized, with or without the addition of a non-ionic emulsifier.
Dependencies are inferred from the claim text.