Disclosed herein is an aqueous coating composition containing an aqueous epoxy resin dispersion, an aqueous amine-functional resin dispersion and an aromatic carboxylic acid. The aqueous dispersion contains at least one specific di- and/or polyfunctional monomeric amine and at least one resin component including at least one specific polyfunctional organic amine. Further disclosed herein is a kit-of-parts including a base varnish containing the aqueous epoxy resin dispersion and a curing component containing the aqueous amine-functional resin dispersion as well as the aromatic carboxylic acid. Additionally disclosed herein is a process for producing a coating on the substrate as well as coated substrates resulting from said process. Cured coating layers formed from said compositions exhibit a good adhesion to the substrate as well as a high intercoat adhesion and blistering stability under humidity conditions without negatively influencing the excellent sandability and the good stone chipping properties.

A polypeptide monolayer with a low surface potential and hydrophobicity. The polypeptide is composed of polypeptide molecules with a molecular weight of (1.48±0.2)×10.sup.5 g/mol, a thickness of the monolayer is 6.2-9.0 nm, the exposure of primary amino groups on the surface of the monolayer is 9.5-15%, a Zeta potential of the polypeptide monolayer is (−3)−(−9) mV, and a contact angle of the monolayer is (61±1°)-(84±1°). The monolayer can be ultrathin, with a minimum thickness of only about 6.6 nm. The polypeptide monolayer can also be applied to the preparation of a biosensor, which is conductive to increase in limit of detection. The content of primary amino groups on the surface of polypeptide monolayer is conductive to controllability of further chemical modification and laying the foundation for achieving controllable grafting of polysiloxane and biological preparations in the later stage.

A polypeptide monolayer with a low surface potential and hydrophobicity. The polypeptide is composed of polypeptide molecules with a molecular weight of (1.48±0.2)×10.sup.5 g/mol, a thickness of the monolayer is 6.2-9.0 nm, the exposure of primary amino groups on the surface of the monolayer is 9.5-15%, a Zeta potential of the polypeptide monolayer is (−3)−(−9) mV, and a contact angle of the monolayer is (61±1°)-(84±1°). The monolayer can be ultrathin, with a minimum thickness of only about 6.6 nm. The polypeptide monolayer can also be applied to the preparation of a biosensor, which is conductive to increase in limit of detection. The content of primary amino groups on the surface of polypeptide monolayer is conductive to controllability of further chemical modification and laying the foundation for achieving controllable grafting of polysiloxane and biological preparations in the later stage.

A heat treatment method for improving the mechanical property and the biofunctional stability of a magnesium alloy is provided, comprising: (1) fully annealing an original cold-drawn magnesium alloy AZ31; (2) polishing a surface of the magnesium alloy AZ31 from the step (1) by a waterproof abrasive paper; (3) heating the magnesium alloy AZ31 obtained from the step (2) to a temperature of 330° C. to 350° C. and keeping the temperature for 3 to 4 hours; and (4) cooling the magnesium alloy AZ31 obtained from the step (3) to room temperature. A method for manufacturing a small-peptide-coated biomaterial and an application of the small-peptide-coated biomaterial are further provided.

The present application discloses a thermal insulation coating and a method for applying the same. Raw materials for preparing the thermal insulation coating includes PVDF resin, water-based epoxy resin solution, hollow glass microbead, ytterbium modified nano-powder, diluent, polyvinyl alcohol, titanium dioxide powder, rare earth, negative ion powder, and leveling agent.

The present application discloses a thermal insulation coating and a method for applying the same. Raw materials for preparing the thermal insulation coating includes PVDF resin, water-based epoxy resin solution, hollow glass microbead, ytterbium modified nano-powder, diluent, polyvinyl alcohol, titanium dioxide powder, rare earth, negative ion powder, and leveling agent.

A method for manufacturing an aluminum alloy sheet may include melting aluminum alloy composition containing silicon (Si), iron (Fe), copper (Cu) and manganese (Mn) in weight % on the basis of remainder of aluminum (Al) to make cast alloy having a constant initial thickness; rolling the cast alloy to allow the initial thickness to be reduced, whereby the cast alloy is elongated to aluminum alloy sheet; and performing heat treatment on the aluminum alloy sheet.

A method for manufacturing an aluminum alloy sheet may include melting aluminum alloy composition containing silicon (Si), iron (Fe), copper (Cu) and manganese (Mn) in weight % on the basis of remainder of aluminum (Al) to make cast alloy having a constant initial thickness; rolling the cast alloy to allow the initial thickness to be reduced, whereby the cast alloy is elongated to aluminum alloy sheet; and performing heat treatment on the aluminum alloy sheet.

The instant invention concerns the use of polymers obtained by radical copolymerization of a mixture of (1) acrylic acid; (2) methacrylic acid; and (3) at least one allylcatechol selected from 4-allylbenzene-1,2-diol, 3-allylbenzene-1,2-diol; methylated forms thereof (eugenols); and mixtures thereof, for treating a metallic surface intended to be adhesive-bonded to another surface, in order to impart a resistance to the adhesive failure to the resulting bonding.

A paint baking oven comprises an oven body and a hot air supplier that supplies hot air into the oven body. The paint baking oven bakes a wet coating applied to a vehicle body while conveying the vehicle body. The vehicle body includes a body exterior part and a narrow portion. The oven body is configured to include a spot baking region in which the hot air is blown primarily toward the narrow portion to locally bake a coating film applied to the narrow portion.