The present disclosure provides an aqueous binder composition for forming a sacrificial corrosion-protective coating, said composition being free of chromates and also preferably free of borates and molybdates. Said binder composition advantageously has a pH of less than 6 and comprises a binder, particles of at least one metal oxide and at least one metallic phosphate, said binder comprising a hydrolyzed organosilane oligomer. In addition, the proportion by weight of said particles of at least one metal oxide relative to the total dry weight of said binder composition is greater than or equal to 75%.

The present invention relates to a three component composition consisting of a polyol component (A) comprising at least two polyols, one with high and one with low molecular weight, and water, a polyisocyanate component (B) comprising a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2.5, or a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2 and at least one further polyol with an amount of between 1% and 30% based on the weight of said polyisocyanate component (B), wherein said MDI product and said polyol have reacted at least partially, and a powder component (C) comprising at least one hydraulic binder, preferably cement and/or calcined paper sludge, preferably a calcium compound selected from calcium hydroxide and/or calcium oxide, and optionally one or more aggregates. Polyurethane cementitious hybrid flooring or coating systems having glossy/semiglossy surfaces, good workability and outstanding mechanical properties can be achieved. Blister formation can be avoided.

The invention refers to the gypsum industry and the construction industry, in particular to a method for obtaining a water/gypsum mixture used to manufacture gypsum products. The technical result of the invention is continuous industrial manufacturing of water/gypsum mixture at critically low water/gypsum ratio while maintaining high fluidity of the mixture. The said technical result is achieved because a method for continuous manufacturing water/gypsum mixture at a water/gypsum ratio of less than 0.25:1 is implemented by using a portion of the mixture as a transport medium for introducing new batches of liquid and dry components and includes the following stages: pre-mixing a flow of fluid water/gypsum mixture and dry components; obtaining, in the mixer, a finished water/gypsum mixture with the specified water/gypsum ratio by intensively mixing the pre-mixed dry components and fluid water/gypsum mixture flow; releasing a portion of the finished water/gypsum mixture flow from the process cycle and returning the remaining portion of the finished water/gypsum mixture to the mixing process as a transport medium for introducing new components; obtaining a fluid water/gypsum mixture flow after adding liquid components to the remaining portion of the water/gypsum mixture flow with subsequent mixing.

A composite member includes an inorganic matrix part made from an inorganic substance including at least one of a metal oxide or a metal oxide hydroxide and an organic fiber that is directly fixed to the inorganic matrix part without interposing an adhesive substance different from the inorganic substance making up the inorganic matrix part and is present in a dispersed state within the inorganic matrix part. The composite member has a porosity of 20% or less in a section of the inorganic matrix part.