Aqueous fluoropolymer dispersions
AssigneePPG Industries, Inc.
InventorsSuryya K. Das, Soner Kilic
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Abstract
A stable, aqueous fluorocopolymer dispersion prepared by aqueous dispersion polymerization of a) a dispersed phase containing a fluoroolefin monomer component and a vinyl ether monomer component in the presence of b) a base neutralized, stable aqueous dispersion of a polymeric dispersant having an acid value of at least 1.5 mg KOH/gram not exceeding about 35 mg KOH/gram and the amount of neutralizing base does not exceed about 10 percent based on resin solids of the dispersant. The acid value is adapted to provide a stable dispersion of the fluorocopolymer in water without externally added surfactant. Thermoplastic and thermosetting coating compositions can be prepared from these aqueous fluorocopolymer dispersions.
Claims24
A stable aqueous fluorocopolymer dispersion synthesized by aqueous dispersion polymerization of
- a) monomers comprising a fluoroolefin monomer component and a vinyl ether monomer component, in the presence of
- b) a base neutralized, stable aqueous dispersion of a hydroxyl functional polymeric dispersant having an acid value of at least about 1.5 mg KOH/gram of polymer and not exceeding about 35 mg KOH/gram of polymer and a number average molecular weight ranging from about 500 to about 250,000, the amount of neutralizing base not exceeding about 10 percent based on the resin solids of the polymeric dispersant, the acid value adapted to provide a stable dispersion of the fluorocopolymer in water without externally added surfactant.
A stable aqueous fluorocopolymer dispersion synthesized by aqueous dispersion polymerization of:
- (a) monomers comprising a fluorolefin monomer component and a vinyl ether monomer component in the presence of:
- b) a base neutralized, stable aqueous dispersion of a hydroxyl functional acrylic polymer having an acid value of at least about 1.5 mg KOH/gram of polymer and not exceeding about 10 mg KOH/gram of polymer and a number average molecular weight ranging from about 500 to about 250,000, synthesized from a vinyl monomer component comprising at least about 50 percent of 2-hydroxyethyl acrylate and at least one other comonomer, the percentages based on the total weight percent of the vinyl monomer component, the amount of neutralizing base not exceeding 10 percent based on the resin solids of the acrylic polymer, the proportion of each monomer and the acid value adapted to provide a stable dispersion of the fluorocopolymer in water without externally added surfactant.
A coating composition comprising a stable, aqueous fluorocopolymer dispersion synthesized by aqueous dispersion polymerization of
- a) monomers comprising a fluoroolefin monomer component and a vinyl ether monomer component in the presence of
- b) a base neutralized, stable aqueous dispersion of a hydroxyl functional polymeric dispersant having an acid value of at least about 1.5 mg KOH/gram of polymer and not exceeding about 35 mg KOH/gram of polymer and a number average molecular weight ranging from about 500 to about 250,000, the amount of neutralizing base not exceeding 10 percent based on resin solids of the polymeric dispersant, the acid value adapted to provide a stable dispersion of the fluorocopolymer in water without externally added surfactant.
Dependencies are inferred from the claim text.