Non-aqueous dispersion for alkyd formulation
AssigneeRohm and Haas Company
InventorsFrederick H. Walker, Chao-Jen Chung, Andrew Mercurio
Life of this patent
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Abstract
A non-aqueous dispersion for modifying alkyd-containing coating formulations and a method for manufacturing the non-aqueous dispersion are provided. The non-aqueous dispersion contains from about 10 to about 60 parts by weight of a low molecular weight solution polymer, having a selected glass transition temperature greater than about -10.degree. C., and from about 90 to about 40 parts by weight of a polymer which is insoluble in the non-aqueous medium, and where the soluble polymer is attached to or adsorbed onto the insoluble polymer particles. The non-aqueous dispersion is preferably prepared by dispersion polymerization to form the insoluble polymer in a non-aqueous medium in the presence of the soluble polymer.
Claims5
A method for reducing the drying time of a coating formed from an alkyd-containing formulation comprising:
- admixing with said alkyd-containing formulation at least an effective amount of a non-aqueous, alkyd-free polymeric dispersion comprising from about 10 to about 60 weight percent of a first polymer, said first polymer, consisting essentially of an addition-polymerized polymer formed from at least one monoethylenically-unsaturated monomer, and from about 90 to about 40 weight percent of a second polymer, said second polymer consisting essentially of an addition-polymerized polymer formed from at least one monoethylenically-unsaturated monomer, where said first polymer is attached to or adsorbed onto said second polymer and where said first polymer is soluble in the non-aqueous medium, has a number average molecular weight in the range of from about 2000 to about 40,000, and has a calculated glass transition temperature greater than -10.degree. C., and where said second polymer is insoluble in said non-aqueous medium.
Dependencies are inferred from the claim text.