摘要:
Coating compositions for fibrous nonwoven and woven coated mats comprising a platey filler, mica, talc, clay, etc., of particular critical mean particle sizes and aspect ratios, one or more pigments of particular particle sizes and a resin binder producing a good surface and low permeabilities achieved with low coating weights are disclosed. Also, disclosed are fibrous mats coated on at least one surface with the coating compositions and laminates having a coated fibrous mat bonded to at least one surface of the substrate of the laminate. The platey mica in the coating has a mean particle size of about 38+/−8 or less microns and an aspect ratio of about 36+/−7 or less.
摘要:
The problems to be solved by the invention are to provide a fiber reinforced cement composition for obtaining a fiber reinforced cement product which is excellent in bending strength, dimensional stability and installing property such as handling property, flexibility performance and nail performance, as well as a process for manufacturing the product.Namely, the fiber reinforced cement composition comprises the following raw materials: a hydraulic inorganic material, a siliceous material and a woody reinforcement, wherein the siliceous material is an inorganic hollow material and/or an inorganic spherical material and a finely dividing inorganic hollow material and/or a finely dividing inorganic spherical material.The effects of the present invention, it is possible to obtain a fiber reinforced cement product having good bending strength, dimensional stability and installing property such as handling property, flexibility performance and nail performance.
摘要:
The problems to be solved by the invention are to provide a fiber reinforced cement composition for obtaining a fiber reinforced cement product which is excellent in bending strength, dimensional stability and installation property such as handling property, flexibility performance and nail performance, as well as a process for manufacturing the product.Namely, the fiber reinforced cement composition comprises the following raw materials: a hydraulic inorganic material, a siliceous material and a woody reinforcement, wherein the siliceous material is a mixture of an average particle size of not less than 15 μm and not more than 50 μm which is burned ash of coal and/or rhyolite and an average particle size of not less than 1 μm and not more than 15 μm which is burned ash of coal and/or rhyolite.The effects of the present invention, it is possible to obtain a fiber reinforced cement product having good bending strength, dimensional stability and installation property such as handling property, flexibility performance and nail performance.
摘要:
The invention relates to a process for producing a molding, characterized in that a silicatic solid is mixed with a solution comprising a first silicatic binder and the mixture is then press-molded, and the compression molding is then post-treated with a solution comprising a second silicatic binder, and to silicatic moldings obtainable by this process, and also to their use as construction material, insulator material, gasket material or fire-resistant material.
摘要:
Hydraulic cement compositions are provided that include a cement, water; and a dispersant that comprises a low molecular weight starch with anionic groups. The starch dispersants provided may possess desirable biodegradable properties making them particularly suitable for certain downhole well operations.
摘要:
Cement compositions are provided that comprise a hydraulic cement, water, and a set retarder composition, the set retarder composition comprising an acrylamide polymer derivative; and an iron compound. In some embodiments, cement compositions are provided that comprise a hydraulic cement comprising a cement, water, and a set retarder composition, the set retarder composition comprising a lignin-based retarder and an iron compound.
摘要:
Methods of cementing in a subterranean formation may include the steps of: providing a cement composition comprising a cement, water, and a dispersant comprising a low molecular weight starch that comprises anionic groups; placing the cement composition in the subterranean formation; and allowing the cement composition to set therein. In certain embodiments, improved biodegradable dispersants may include low molecular weight starches having anionic groups.
摘要:
A coating composition that contains hard particles, a binder, and at least one thickening agent is provided. Pigment materials, a dispersant, a biocide, and a defoaming agent may also be included. The particles may have a size of about 1.0 to about 20.0 microns and a hardness of at least 5 on the Mohs Hardness Scale. The hard particles may be present in the composition in an amount from about 2.0 to about 15.0% by weight of the composition. The coating composition may be applied to a veil to form a wear resistant coating. The coated veil may then be used to form a coated gypsum product. The coating composition improves wear resistance and reduces damaging effects that may be caused by winding, workers handling the coated gypsum product during installation, and/or adverse conditions after installation. Methods of forming a coated veil and coated gypsum products are also provided.
摘要:
Cement compositions that include improved lost circulation materials are provided. In certain exemplary embodiments, the improved lost circulation materials include inelastic particles of polyethylene, polystyrene, and/or polypropylene. Optionally, the cement compositions also may include additives such as fly ash, a surfactant, a dispersant, a fluid loss control additive, a conventional lost circulation material, an accelerator, a retarder, a salt, a mica, fiber, a formation-conditioning agent, fumed silica, bentonite, expanding additives, microspheres, weighting materials, or a defoamer.
摘要:
The present invention concerns a method for preparing materials containing binder systems derived from amorphous silica and bases as well as the materials prepared by the method. Relative to known methods, the present invention allows for continuous production of material as the two components of the binder are brought onto into contact where the binder system is to be applied. The product achieved by the invention has a broad range of applications, such as for construction materials, insulating materials, fire proof materials, reinforcement materials etc. the present invention also relates to a method for preparing materials containing binder systems derived from amorphous inorganic material and bases as well as the materials prepared by the method.