Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

This invention provides a method for forming a multilayer coating film, the method comprising forming a multilayer coating film that has excellent blackness, high reflectance of an infrared laser, and excellent coating film performance. The method for forming a multilayer coating film includes forming a first colored coating film containing a titanium oxide pigment, in which the diffuse reflectance at a wavelength of 905 nm or diffuse reflectance at a wavelength of 1550 nm, or both, is 40% or more; forming a second colored coating film containing at least one pigment selected from the group consisting of (A1) a perylene black pigment, (A2) a black metal oxide complex pigment, and (A3) two or more pigments selected from the group consisting of blue pigments, red pigments, yellow pigments, and green pigments; forming a third colored coating film containing a carbon black pigment; and forming a clear coating film; wherein the multilayer coating film has a lightness L*(45°) of 3 or less and a chroma C*(45°) of 1 or less, and wherein the diffuse reflectance at a wavelength of 905 nm or the diffuse reflectance at a wavelength of 1550 nm of the multilayer coating film, or both, is 10% or more.

A method for transferring a graphene film is provided. The method includes spin-coating a cera alba containing solution onto a surface of the graphene film on a metal substrate to form a cera alba layer as a supporting layer, so as to obtain a first stack having the cera alba layer, the graphene film and the metal substrate in sequence; removing the metal substrate with an etching solution to obtain a second stack having the cera alba layer and the graphene film, transferring the second stack onto a target substrate to obtain a third stack having the second stack and the target substrate, and drying the third stack; removing the cera alba layer with an organic solvent. By using natural non-toxic harmless cera alba as a supporting material, it is possible to obtain the graphene film with a clean and intact surface and low sheet resistance.

The object of the present invention is to provide an aqueous coating composition which exhibits a small viscosity change and can form a coating film having a superior coating film appearance even when the amount of the solvent contained in the aqueous coating composition is reduced due to changes in the coating environment.

The present invention provides an aqueous coating composition comprising an acrylic resin dispersion (A) and a melamine resin (B), wherein the acrylic resin dispersion (A) has a core/shell structure, the acrylic resin dispersion (A) is a dispersion of a solution-polymerization product of a core part preparation monomer (a-1) and a shell part preparation monomer (a-2), wherein the shell part preparation monomer (a-2) comprises an acid group-containing polymerizable monomer, the mass ratio of the core part to the shell part of the acrylic resin dispersion (A) is in the range of core part/shell part=30/70 to 70/30, the shell part of the acrylic resin dispersion (A) has an acid group, and the neutralization rate of the acid groups in the shell part is 50% or more, the weight-average molecular weight of the acrylic resin dispersion (A) is in the range of 10,000 to 70,000, the core part preparation monomer (a-1) has an acid value of 10 mg KOH/g or less, and the shell part preparation monomer (a-2) has an acid value of 10 mg KOH/g or more and 70 mg KOH/g or less, the whole monomer mixture comprising the core part preparation monomer (a-1) and the shell part preparation monomer (a-2) has an acid value of 10 mg KOH/g or more and 30 mg KOH/g or less, the glass transition temperature of the acrylic resin dispersion (A) is in the range of −10 to 60° C., and the melamine resin (B) comprises a hydrophobic melamine resin.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.