摘要:
The present invention relates to a special method of preventing substrate colour changes when impregnating porous inorganic substrates, by first applying to the target substrate surface a primer composition, drying and curing the primer system, the substrate surface acquiring hydrophobic and oleophobic properties such that drops of water applied thereto evaporate before they penetrate into the substrate and a drop of n-decane likewise applied thereto and left to act for 30 seconds can be removed, without the drops leaving dark spots on the substrate surface, and then carrying out the impregnation. The present invention further relates to the use of fluoroalkyl-modified and/or fluorofunctional acrylate systems or fluoroalkyl-/aminoalkyl-/alkoxyand/or hydroxy-functional siloxane systems or fluoroalkyl-functional silane and/or siloxane systems or mixtures of at least two of the aforementioned substances or solutions thereof in water and/or alcohol as primers for preventing substrate colour changes in the case of architectural preservation by impregnation.
摘要:
Novel undercoats for use on porous bases such as, for example, concrete are disclosed. Said undercoats contain or comprise at least one epoxy resin, at least one latent hardener and at least one solvent. The above are characterize in being easy to produce, contain no isocyanate groups and form a good ageing-resistant adhesion, in particular, with single component isocyanate-free sealants, cross-linked by means of silane groups.
摘要:
The present invention provides for an acoustically absorbent porous panel that is both rigid and resistant to sagging caused by moisture. The acoustically absorbent porous panel is comprised of at least two layers. The first layer is a facing layer formed from a cured aqueous foamed cementitious material. The foamed cementitious material comprises on a wet basis about 53% to about 68% by weight cement, about 17% to about 48% by weight water, about 0.05% to about 5% by weight fiber, and about 0.01% to about 10% by weight surfactant. Additionally, pores distributed within the cured material comprising about 75% to about 95% by volume of the material. The second layer is a backing layer that is affixed to the facing layer.
摘要:
A concrete material that includes an elastomeric polymer in an amount sufficient to provide flexibility to the resultant material; a silicone resin in an amount sufficient to improve adhesion between the elastomeric polymer and the cement; a cement that has low shrinkage and expansion properties; a filler; and water in an amount sufficient to cure the cement and form the concrete material. The polymer is present in an amount which fills at least some of the pores in the material and the silicone resin helps the polymer bond the filler to the cement. Also, a concrete material property improving additive in the form of a polymer admixture that includes the elastomeric polymer, a silicone resin and at least one solvent in an amount sufficient to form a viscous flowable mass. Another embodiment is a method of forming a concrete material by forming and curing a mixture of the additive, a cement that has low shrinkage and expansion properties, a filler, and water in an amount sufficient to cure the cement. Another embodiment is a method of repairing a crack or fracture in a concrete or cement surface by cleaning surfaces of the crack or fracture to remove loose material and to create a cavity, applying the concrete material of the invention under pressure into the cavity, and allowing the concrete material to cure to repair the crack or fracture. The resultant repaired surface forms yet another embodiment of the invention.
摘要:
A layer is provided for bonding a conductive plating to a substrate which substrate normally does not provide firm bonding of plating directly thereto. The bonding layer forms a matrix in which are dispersed ultrafine metal particles. The bonding layer is formed in situ on the substrate surface with the metal particles being maintained unaggregated in the matrix as it is formed on the surface. Plating subsequently formed on the outer surface of the bonding layer is effectively firmly bonded to the substrate through the intermediary of the matrix and metal particles distributed therein. The bonding layer includes a fixative formed of an organic compound including a metal and an organic solvent. The bonding layer may further include a film strengthener.
摘要:
A method of manufacturing an inlaid ceramic element for a timepiece including: a) forming a ceramic or cermet body; b) etching at least one recess in one face of the ceramic or cermet body, each at least one recess forming a pattern cavity for a decoration; c) changing a surface state of a bottom of the at least one recess to increase contact surface thereof; d) filling the at least one recess with a composite ceramic to form the decoration; e) flattening the composite ceramic so that the composite ceramic remains only in a hollow of the at least one recess.
摘要:
An exemplary hard, inflexible flooring material or wall covering material is disclosed, such as a tile, having a top surface and a bottom surface, wherein the bottom surface is provided with a solid, primer layer having about 60 wt % to 100 wt % of a hydrophobic material, and which layer is present in a thickness between 0.001 to 0.5 mm. A method is disclosed of adhering a tile which has been provided with such a solid, primer layer to a substrate, the method including: applying an adhesive to at least a portion of the substrate; impressing the bottom surface of the tile into the adhesive; and, allowing the adhesive to dry. Alternatively, the substrate can be provided with such primer layer, and an adhesive and tile can be applied on the substrate.
摘要:
The present invention is directed to a synergistic multilayer anti-corrosion resistant coating for a metal surface, the coating having three subcoatings, a) a self assembled monolayer nanoprimer; b) a polymeric primer; c) a polymeric top coat containing microcapsules for self-healing. The present invention is further direction to systems and methods for producing the coating in situ on the metal surface. The present invention provides an economical, non-epoxy-based, corrosion coating having favorable resistance to acid and to salt water, and having favorable adhesion properties.
摘要:
An improved primer formulation for composite building materials, such as materials that are generally cementitious, gypsum, or of another inorganic building material, such as those containing cellulose, glass, steel or polymeric fibers. The improved formulation effectively blocks moisture from penetrating the composite building material and is better than alternate or conventional primers. The formulation also improves adhesion and prevents peel failure of a topcoat when applied to the composite building material. The improved formulation acts as a weather-guard and a hydrophobic treatment to all surfaces of the composite building material upon application.
摘要:
A fire-barrier system comprises at least one alkali silicate resin composition layer and at least one layer of any of the following: an insulation layer, an intumescent layer, a foam layer, a corrugated layer, a reflective surface layer, and a reinforcing material layer. The fire-barrier system when utilize in association with a substrate such as wood, a polymer, etc. provides enhanced fire resistance performance, thermal barrier, an oxidation barrier, and the like.