Fluorocarbon-containing hydrophilic polymer coating composition for heat exchangers
AssigneeVisteon Global Technologies, Inc.
InventorsChimere N. Obioha, Riad A. Farah, Dennis Schuetzle, Yun-xiang Zhang
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Abstract
A hydrophilic coating composition for hydrophilically coating a metallic surface. The coating composition comprises a fluorocarbon-containing hydrophilic polymer comprising units of hydrophilic monomer and fluorocarbon-containing hydrophobic comonomer. The coating composition produces hydrophilic coatings on the metallic surface having a contact angle below about 50°.
Claims19
A hydrophilic coating composition for hydrophilically coating a metallic surface, said coating composition comprising a hydrophilic polymer comprising units of hydrophilic monomer and units of fluorocarbon-containing hydrophobic comonomer, said coating composition producing hydrophilic coatings on the metallic surface having a contact angle below about 50°, wherein said units of hydrophilic monomer include units selected from the group consisting of acrylamide, vinyl acetate, vinyl alcohol, vinyl pyrrolidone and mixtures thereof, wherein said units of hydrophilic monomer further include units selected from the group consisting of hydrophilic cationic and anionic monomers, said hydrophilic polymer being a terpolymer comprising units having the formula:
- where R1=H or CH3;
- x=an organic linking group;
- p=0 or 1;
- Rf=is a perfluoronated alkyl or perfluoronated poly-(alkyleneoxy) group;
- m=0.01-10 mole percent;
- n+i=90-99.99 mole percent;
- n/i=molar ratio=10/90 to 90/10;
- and
A hydrophilic coating composition for hydrophilically coating a metallic surface, said coating composition comprising a hydrophilic polymer comprising units of hydrophilic monomer and units of fluorocarbon-containing hydrophobic comonomer, said coating composition producing hydrophilic coatings on the metallic surface having a contact angle below about 50°, said coating composition further comprising water, a water soluble polymer and a curing agent, wherein said hydrophilic polymer is present in said coating composition, based on the weight of said coating composition, from about 0.05 to about 10 weight percent, said water soluble polymer being present in said coating composition from about 1 to about 20 weight percent, said curing agent being present in said coating composition from about 1 to about 5 weight percent, and said water being present in said coating composition from about 65 to about 98 weight percent.
A method of hydrophilically coating a metallic surface, said method comprising
- (i) providing a metallic surface,
- (ii) providing a coating composition comprising a hydrophilic polymer comprising units of hydrophilic monomer and units of fluorocarbon-containing hydrophobic comonomer,
- (iii) applying the coating composition to the metallic surface;
- and
- (iv) curing the coating composition to form a hydrophilic coating on the metallic surface;
- wherein said hydrophilic polymer is a terpolymer comprising units having the general formula:
- where R1=H or CH3;
- x=an organic linking group;
- p=0 or 1;
- R1 is a perfluoronated alkyl or perfluoronated poly-(alkyleneoxy) group;
- mn=0.01-10 mole percent;
- n+i=9-99.99 mole percent;
- n/i=molar ratio=10/90 to 90/10;
- and
A method of hydrophilically coating a metallic surface, said method comprising
- (i) providing a metallic surface,
- (ii) providing a coating composition comprising a hydrophilic polymer comprising units of hydrophilic monomer and units of fluorocarbon-containing hydrophobic comonomer,
- (iii) applying the coating composition to the metallic surface;
- and
- (iv) curing the coating composition to form a hydrophilic coating on the metallic surface;
- wherein said coating composition further comprises water, a water soluble polymer and a curing agent, wherein said hydrophilic polymer is present in said coating composition, based on the weight of said coating composition, from about 0.05 to about 10 weight percent, said water soluble polymer being present in said coating composition from about 1 to about 20 weight percents said curing agent being present in said coating composition from about 1 to about 5 weight percent, and said water being present in said coating composition from about 65 to about 98 weight percent.
Dependencies are inferred from the claim text.