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US 4,124,554 AGranted
Post-formed aqueous phenolic resin dispersions
AssigneeUnion Carbide Corporation
InventorJohn S. Fry
Life of this patent
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Abstract
There is disclosed a process for producing a dispersion of a phenolic resin in water by mixing a pre-formed, solid, substantially water-insoluble, phenolic resin with water, an organic coupling solvent, and polyvinyl alcohol. The resulting dispersions are especially useful in coatings applications.
Claims16
A process for producing a dispersion of a solid, substantially water-insoluble, phenolic resin in water, which process comprises subjecting a mixture of:
- (a) a pre-formed, solid, substantially waterinsoluble phenolic resin;
- (b) water;
- (c) a water miscible organic coupling solvent in an amount from about 15 to about 30 volume percent based upon the volume of water plus coupling solvent;
- and
- (d) a polyvinyl alcohol that is hydrolyzed to an extent of from about 85 to about 91 percent in an amount of from about 51/4 to about 13 weight percent based upon the weight of phenolic resin plus polyvinyl alcohol, to shearing agitation at a temperature and for a period of time sufficient to produce a stable dispersion of said phenolic resin in water.
2 more elements
Dependencies are inferred from the claim text.