Low VOC aqueous coating compositions and coated substrates
AssigneeMan-Gill Chemical Company
InventorRichard R. Zaleski
Life of this patent
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Abstract
In accordance with the present invention, there is provided an aqueous and low VOC composition which is particularly useful as a coating composition for non-porous substrates. The aqueous compositions comprise (A) at least one water-dispersible or emulsifiable olefin polymer; (B) at least one non-ionic surfactant; (C) at least one anionic surfactant; (D) at least one volatile organic liquid; and (E) water. Preferably, the aqueous compositions are in the form of oil-in-water emulsions. The invention also relates to a process of preparing the low VOC oil-in-water emulsions, and to the use of such coating compositions as adherent primer coatings for substrates, and in particular, non-porous substrates.
Claims57
An aqueous composition characterized by a VOC of less than about 3.5 pounds/gallon comprising effective amounts of:
- (A) at least one water-dispersible or emulsifiable olefin polymer;
- (B) at least one non-ionic surfactant;
- (C) at least one anionic surfactant;
- (D) at least one volatile hydrocarbon liquid;
- and
- (E) water.
An oil-in-water emulsion having a VOC content of less than about 3.5 pounds/gallon which comprises:
- (A) from about 3% to about 25% by weight of at least one water-dispersible or emulsifiable olefin polymer;
- (B) from about 0.1% to about 5% by weight of at least one non-ionic surfactant;
- (C) from about 0.02% to about 2.5% by weight of at least one anionic surfactant;
- (D) from about 5% to about 20% by weight of at least one volatile hydrocarbon liquid;
- and
- (E) from about 40% to about 80% by weight of water.
A process for preparing low VOC oil-in-water emulsions of improved stability which comprises the steps of:
- (A) preparing an aqueous mixture comprising an effective amount of at least one water-soluble non-ionic surfactant;
- (B) preparing a mixture of effective amounts of at least one olefin polymer, at least one anionic surfactant, and at least one hydrocarbon solvent;
- and
- (C) adding the aqueous mixture prepared in step (A) to the hydrocarbon mixture prepared in step (B) with agitation to form an invert oil-in-water emulsion.
Dependencies are inferred from the claim text.