A resin-impregnated boron nitride body includes a polymer-derived boron nitride and a resin. A process for manufacturing such a resin-impregnated boron nitride body includes: polymerizing a boron nitride molecular precursor into a preceramic polymer shaping the preceramic polymer to form an infusible polymer body; submitting the polymer body to a thermal treatment to obtain a boron nitride body; impregnating the boron nitride body with a resin; and curing the resin.

A sealer composition for a cementitious substrate, a cementitious structure sealed with the sealer composition, and a method of sealing a steel reinforced cementitious structure with the sealer composition. The sealer composition includes a substantially non- aqueous blend of a first silane, a second silane having a higher molecular weight than the first silane, and a corrosion inhibitor. The corrosion inhibitor is soluble in silane, soluble in solvent-diluted silane, and at least partially soluble in water. The cementitious structure includes a cementitious substrate and the sealer applied to the surface of the substrate and at least partially penetrating into the substrate. The method of sealing a steel reinforced cementitious structure from intrusion of corrosion-causing agents includes applying the sealer to the surface of a steel reinforced cementitious substrate and permitting the sealer composition to penetrate into the substrate to seal the substrate.

The present invention relates to a building waterproofing kit-of-parts comprising A) an aqueous first composition, containing ao) water, a1) a ketone solvent and a2) a carboxylic acid and a3) an alkylalkoxysilane and/or a4) an aminoalkylalkoxysilane, and B) a second composition, containing b1) an alkylalkoxysilane and b2) a hydrocarbon solvent as well as b3) an alcohol solvent and/or b4) an ester solvent and/or b5) a ketone solvent. The invention further relates to the use of the kit-of-parts for the waterproofing of buildings and the elimination of moisture damage in buildings. The invention also relates to a liquid building waterproofing agent, obtained by blending the aforementioned compositions A) and B). Furthermore, the invention relates to an aqueous composition, containing 3.0 to 8.0% by weight of the ketone solvent a1), 0.1 to 1.2% by weight of the aminoalkylalkoxysilane a4), 0.1 to 1.2% by weight of the alkylalkoxysilane a3). 0.01 to 0.75% by weight of the carboxylic acid a2) and/or 88.85 to 96.79% by weight of water, and to the use thereof as a concentrate for the production of the composition A).

A curable composition comprises (A) a first siloxane oligomer being free from a siloxane unit represented by the following formula (I) and containing an alkoxy-group-containing siloxane unit, (B) a second siloxane oligomer containing a siloxane unit represented by the formula (I) and an alkoxy-group-containing siloxane unit, (C) a silicone oil having a kinetic viscosity at 25° C. of not less than 100 mm.sup.2/s, (D) at least one curing catalyst selected from the group consisting of a metal alkoxide, a metal chelate compound, and a metal carboxylate, and (E) a solvent containing an organic solvent having a vapor pressure at 20° C. of not less than 1 kPa.

A system and a method are provided for inhibiting pyrrhotite-caused damage to concrete structures. The system includes at least one concrete structure, a quantity of migratory corrosion-inhibiting solution, a quantity of concrete reinforcing solution, and a water sealing substance. The concrete structure can be any structure where the concrete aggregate contains pyrrhotite. The quantity of migratory corrosion-inhibiting solution is applied to the concrete structure to prevent further oxidation of pyrrhotite within the concrete structure. The quantity of concrete reinforcing solution is applied to the concrete structure to lower the porosity of the concrete structure and strengthen the overall integrity of the concrete structure. The water sealing substance is applied to the concrete structure to repel water from the concrete structure preventing any further chemical reactions with the pyrrhotite.

A sealer composition for a cementitious substrate, a cementitious structure sealed with the sealer composition, and a method of sealing a steel reinforced cementitious structure with the sealer composition. The sealer composition includes a substantially non-aqueous blend of a first silane, a second silane having a higher molecular weight than the first silane, and a corrosion inhibitor. The corrosion inhibitor is soluble in silane, soluble in solvent-diluted silane, and at least partially soluble in water. The cementitious structure includes a cementitious substrate and the sealer applied to the surface of the substrate and at least partially penetrating into the substrate. The method of sealing a steel reinforced cementitious structure from intrusion of corrosion-causing agents includes applying the sealer to the surface of a steel reinforced cementitious substrate and permitting the sealer composition to penetrate into the substrate to seal the substrate.

Disclosed is a moderator for moderating neutrons, including a substrate and a surface treatment layer or a dry inert gas layer or a vacuum layer coated on the surface of the substrate, wherein the substrate is prepared from a moderating material by a powder sintering device through a powder sintering process from powders or by compacting powders into a block, and the moderating material includes 40% to 100% by weight of aluminum fluoride; wherein the surface treatment layer is a hydrophobic material; and the surface treatment layer or the dry inert gas layer or the vacuum layer is used for isolating the substrate from the water in the environment in which the substrate is placed. The surface treated moderator can avoid the hygroscopic or deliquescence of the moderating material during use, improve the quality of the neutron source and prolong the service life.

A curable composition comprises (A) a first siloxane oligomer being free from a siloxane unit represented by the following formula (I) and containing an alkoxy-group-containing siloxane unit, (B) a second siloxane oligomer containing a siloxane unit represented by the formula (I) and an alkoxy-group-containing siloxane unit, (C) a silicone oil having a kinetic viscosity at 25 C. of not less than 100 mm.sup.2/s, (D) at least one curing catalyst selected from the group consisting of a metal alkoxide, a metal chelate compound, and a metal carboxylate, and (E) a solvent containing an organic solvent having a vapor pressure at 20 C. of not less than 1 kPa.

An exterior sheathing cementitious panel which prevents water penetration and air leakage is provided. Methods for manufacturing exterior sheathing cementitious panels with a highly efficient integrated air/water barrier membrane are provided as well.

A method for manufacturing a decorative element comprising a substrate and a top layer wherein the substrate is made of an engineered stone and wherein the top layer comprises a decorative pattern, comprising the steps of: providing a mixture comprising at least an inorganic filler and a binder; compacting the mixture; and curing the binder to obtain the substrate; wherein the method comprises the step of inkjet printing a first decorative pattern on at least a top surface of the substrate, and wherein the method comprises the step of providing a protective coating above the printed pattern, wherein the protective coating comprises a base coat that is applied immediately on top of the printed pattern and a top-coat that is provided above the base coat, between the application of the base-coat and the application of the top coat the method comprises the step of sanding the base coat.