US 12,649,169 B2 · Antifouling coatings and methods for coating substrates

Abstract

Coatings for reducing or preventing fouling of surfaces are provided. In some embodiments, the coating comprises a silane compound, a siloxane compound, a phosphonate compound, a silicone polymer such as PDMS (polydimethylsiloxane), or a combination of silane-siloxane-phosphonate-PDMS in various molecular configurations in single monolayer and overlay assemblies. Also provided are related methods for forming the coating as well as coated substrates such as heat exchangers. Embodiments of the coatings are highly hydrophobic with high contact angles and the coated substrates may be used in a variety of industrial applications that require handling of oil-in-water emulsions, process water and produced water from various process operations, including Steam Assisted Gravity Drainage (SAGD) operations.

Claims17

Dependent claims

A method for forming a coating on a surface of a substrate, comprising:

cleaning the surface of the substrate;
providing a coating composition comprising at least one surface modifying compound, the at least one surface modifying compound comprising an alkyl silane, a siloxane, an alkyl-phosphonic acid, or a combination thereof,
contacting the surface of the substrate with the coating composition such that at least a portion of the surface modifying compound is grafted to the surface to form a coated surface;
heat treating the coated surface at a first temperature for a first time period;
heat treating the coated surface at a second temperature for a second time period, the second temperature being higher than the first temperature;
heat treating the coated surface at a third temperature for a third time period, the third temperature being higher than the second temperature;
and
repeating the contacting and heat treating steps at least one additional time.

5 more elements

Dependencies are inferred from the claim text.

Antifouling coatings and methods for coating substrates

Life of this patent

Antifouling coatings and methods for coating substrates

Life of this patent

Abstract

Claims17