According to the present invention, there is provided a wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising water, particles of calcium sulphate dihydrate and a stabiliser. Additionally, a method of preparing a wet accelerator and a method of producing a gypsum product are described.

According to the present invention, there is provided a wet accelerator for use in the manufacture of a gypsum product, said wet accelerator comprising water, particles of calcium sulphate dihydrate and a stabiliser. Additionally, a method of preparing a wet accelerator and a method of producing a gypsum product are described.

The present invention relates to a method for the layer-by-layer filling and compaction of cohesive building materials, in particular of cohesive earth building materials, in at least one borehole near the surface, wherein the cohesive building material is introduced into the at least one borehole and is compacted layer-by-layer using a conveying device comprising a stuffing piston driven by means of a push chain drive.

The present invention relates to a polymer latex obtained by aqueous emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising a) vinyl aromatic compounds; b) conjugated dienes; c) hydroxyalkyl esters of ethylenically unsaturated acids in an amount of 2 to 10 wt.-% based on the total weight of monomers; and d) ethylenically unsaturated carboxylic acids or salts thereof in an amount of 0 to 0.15 wt.-% based on the total weight of monomers;
wherein the weight ratio of vinyl aromatic compounds to conjugated dienes is at least 1.3:1 and the polymer latex comprises 2 to 10 wt.-% based on total weight of monomers of non-ionic surfactants having an HLB of 17 to 19 and to constructions materials, preferably cementitious compositions comprising same.

The present invention relates to a polymer latex obtained by aqueous emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising a) vinyl aromatic compounds; b) conjugated dienes; c) hydroxyalkyl esters of ethylenically unsaturated acids in an amount of 2 to 10 wt.-% based on the total weight of monomers; and d) ethylenically unsaturated carboxylic acids or salts thereof in an amount of 0 to 0.15 wt.-% based on the total weight of monomers;
wherein the weight ratio of vinyl aromatic compounds to conjugated dienes is at least 1.3:1 and the polymer latex comprises 2 to 10 wt.-% based on total weight of monomers of non-ionic surfactants having an HLB of 17 to 19 and to constructions materials, preferably cementitious compositions comprising same.

A filler for wall coating compositions, wherein said filler consists of particles, wherein said particles are fired mixtures of 40 to 70% by weight of clay minerals 5 to 32% by weight of crystalline silicic acids 10 to 45% by weight of feldspar 0 to 20% by weight of other aggregates,
and wherein said particles have a d50 grain size of from 1 μm to 40 μm.

A filler for wall coating compositions, wherein said filler consists of particles, wherein said particles are fired mixtures of 40 to 70% by weight of clay minerals 5 to 32% by weight of crystalline silicic acids 10 to 45% by weight of feldspar 0 to 20% by weight of other aggregates,
and wherein said particles have a d50 grain size of from 1 μm to 40 μm.

A continuous flexible cement sheet roll for coating construction slabs, is disclosed. The sheet comprising a flexible cement layer, which has a thickness of between 0.3 to 6 mm, such as between 0.5 and 5 mm, and which comprises a) essentially inorganic mortar and b) up to 15% polymeric binder. When the amount of a component in a mixture is expressed in % units, the weight % of the component relative to the weight of the whole mixture is intended. The flexible cement sheet roll of the invention comprises, a reinforcing layer of a thickness lower than the thickness of said cement layer, selected from films of a nonwoven fabrics, layers of organic or inorganic fibers, polymer webs, chop strand mat, and fiberglass mats, among others.

A continuous flexible cement sheet roll for coating construction slabs, is disclosed. The sheet comprising a flexible cement layer, which has a thickness of between 0.3 to 6 mm, such as between 0.5 and 5 mm, and which comprises a) essentially inorganic mortar and b) up to 15% polymeric binder. When the amount of a component in a mixture is expressed in % units, the weight % of the component relative to the weight of the whole mixture is intended. The flexible cement sheet roll of the invention comprises, a reinforcing layer of a thickness lower than the thickness of said cement layer, selected from films of a nonwoven fabrics, layers of organic or inorganic fibers, polymer webs, chop strand mat, and fiberglass mats, among others.

Embodiments of the disclosure include swellable smart gel sealants and methods of using smart gel sealants. In certain embodiments, the smart gel sealants reversibly swell when exposed to a certain trigger, such as carbonic acid and/or sulfuric acid. In specific embodiments, the smart gel is comprised within a cement composition.