Abstract: The present invention relates to the use of an additive as well as a process to improve the adhesion of a mortar to a building substrate, wherein the mortar is mixed with said additive and is applied to a building substrate selected from the group of polystyrene-containing substrates, polyolefin-containing substrates or polyvinyl chloride-containing substrates, the additive containing (i) a plasticizer that is liquid at 50° C. or lower, has a boiling point of 100° C. or higher, and that has a solubility parameter ? 25° C. between 22.5 MPa1/2 and MPa1/2; (ii) optionally, a filler that has a BET surface area of at least 40 m2/g; (iii) optionally, a biopolymer, (iv) optionally, a protective colloid; and (v) optionally, a water-insoluble film-forming (co)polymer based on ethylenically unsaturated monomers. The invention also covers an additive and a kit of parts suitable for use in the above process.

Abstract: The present invention relates to the use of an additive as well as a process to improve the adhesion of a mortar to a building substrate, wherein the mortar is mixed with said additive and is applied to a building substrate selected from the group of polystyrene-containing substrates, polyolefin-containing substrates or polyvinyl chloride-containing substrates, the additive containing (i) a plasticizer that is liquid at 50° C. or lower, has a boiling point of 100° C. or higher, and that has a solubility parameter ? 25° C. between 22.5 MPa1/2 and MPa1/2; (ii) optionally, a filler that has a BET surface area of at least 40 m2/g; (iii) optionally, a biopolymer, (iv) optionally, a protective colloid; and (v) optionally, a water-insoluble film-forming (co)polymer based on ethylenically unsaturated monomers. The invention also covers an additive and a kit of parts suitable for use in the above process.

Abstract: The present invention provides a process to prepare a powdery additive suitable for improving adhesion of building material compositions to substrates having a surface energy of 50 mJ/m2 or lower, measured according to DIN 5660-2:2011-12, the additive comprising a polysaccharide and a plasticizer, wherein the plasticizer is liquid at 50° C. or lower, has a boiling point of 100° C.

Abstract: The present invention provides a process to prepare a powdery additive suitable for improving adhesion of building material compositions to substrates having a surface energy of 50 mJ/m2 or lower, measured according to DIN 5660-2:2011-12, the additive comprising a polysaccharide and a plasticizer, wherein the plasticizer is liquid at 50° C. or lower, has a boiling point of 100° C.

Abstract: The present invention provides a process to hydrophobize a mortar which is essentially free of cement, comprising the steps of mixing the mortar with an additive and water and subsequently allowing the mortar to cure, wherein the additive contains a component which is a rosin, a rosin derivative, a mixture of a resin with a rosin, or a mixture of a resin with a rosin derivative, wherein when the softening point of the component is higher than 60° C., the curing step is performed at a temperature that is not lower than the softening point of the component minus 20° C. and when the softening point of the component is 60° C. or lower, the curing step is performed at 40° C. or lower, and wherein the rosin and/or rosin derivative have an acid number of at least 50 mg KOH/g, and when the component is a mixture of a resin with a rosin, or a mixture of a resin with a rosin derivative, the resin at 23° C.

Abstract: The present invention pertains to a water-redispersible polymer powder based on at least one modified natural latex. The modified natural latex can be obtained by mixing natural latex with at least one radical initiator and/or oxidizing agent, by mixing and reacting natural latex with at least one olefinically unsaturated monomer and with at least one radical initiator, and/or by mixing natural latex with at least one filler. Preferably, the polymer powder contains up to about 95 wt. % of least one natural latex, about 0 to 50 wt. % of at least one protective colloid, about 2 to 70 wt. % of at least one filler and/or anti-caking agent, as well as optionally further additives. In addition, the invention pertains to a process for the preparation of the polymer powder, the use thereof as an additive in building material compositions, as well as building material compositions containing the polymer powder.

Abstract: The present invention relates to the use of an additive as well as a process to improve the adhesion of a mortar to a building substrate, wherein the mortar is mixed with said additive and is applied to a building substrate selected from the group of polystyrene-containing substrates, polyolefin-containing substrates or polyvinyl chloride-containing substrates, the additive containing (i) a plasticizer that is liquid at 50° C. or lower, has a boiling point of 100° C. or higher, and that has a solubility parameter ? 25° C. between 22.5 MPa1/2 and MPa1/2; (ii) optionally, a filler that has a BET surface area of at least 40 m2/g; (iii) optionally, a biopolymer, (iv) optionally, a protective colloid; and (v) optionally, a water-insoluble film-forming (co)polymer based on ethylenically unsaturated monomers. The invention also covers an additive and a kit of parts suitable for use in the above process.

Abstract: The present invention provides a process to hydrophobize a mortar which is essentially free of cement, comprising the steps of mixing the mortar with an additive and water and subsequently allowing the mortar to cure, wherein the additive contains a component which is a rosin, a rosin derivative, a mixture of a resin with a rosin, or a mixture of a resin with a rosin derivative, wherein when the softening point of the component is higher than 60° C., the curing step is performed at a temperature that is not lower than the softening point of the component minus 20° C. and when the softening point of the component is 60° C. or lower, the curing step is performed at 40° C. or lower, and wherein the rosin and/or rosin derivative have an acid number of at least 50 mg KOH/g, and when the component is a mixture of a resin with a rosin, or a mixture of a resin with a rosin derivative, the resin at 23° C.

Abstract: The invention relates to an additive for hydraulically setting systems based on modified polycarboxylates and water-soluble ethers of high polymeric polysaccharides, optionally containing further standard additives, characterized by a content of a) a water-soluble ether of cellulose or a cellulose-like compound with a viscosity of at least approximately 1,000 mPas, particularly at least approximately 2,000 mPas, measured as a 2% aqueous solution with a Brookfield viscosimeter at 20° C. and 20 rpm and b) a polycarboxylate, whose main chain is linked by means of ester, ether, imide and/or amide groups with polyethylene oxide-containing side chains. The invention also relates to hydraulic mixtures having a content of the above additive and the use thereof.

Abstract: The present invention pertains to a water-redispersible polymer powder based on at least one modified natural latex. The modified natural latex can be obtained by mixing natural latex with at least one radical initiator and/or oxidising agent, by mixing and reacting natural latex with at least one olefinically unsaturated monomer and with at least one radical initiator, and/or by mixing natural latex with at least one filler. Preferably, the polymer powder contains up to about 95 wt. % of least one natural latex, about 0 to 50 wt. % of at least one protective colloid, about 2 to 70 wt. % of at least one filler and/or anti-caking agent, as well as optionally further additives. In addition, the invention pertains to a process for the preparation of the polymer powder, the use thereof as an additive in building material compositions, as well as building material compositions containing the polymer powder.

Abstract: The invention relates to an additive for hydraulically setting systems based on modified polycarboxylates and water-soluble ethers of high polymeric polysaccharides, optionally containing further standard additives, characterized by a content of a) a water-soluble ether of cellulose or a cellulose-like compound with a viscosity of at least approximately 1,000 mPas, particularly at least approximately 2,000 mPas, measured as a 2% aqueous solution with a Brookfield viscosimeter at 20° C. and 20 rpm and b) a polycarboxylate, whose main chain is linked by means of ester, ether, imide and/or amide groups with polyethylene oxide-containing side chains. The invention also relates to hydraulic mixtures having a content of the above additive and the use thereof.

Abstract: The invention relates to a redispersible powder obtainable by (co)polymerization, using a polymer with cationic functionality in an aqueous medium, optionally accompanied by the use of conventional additives, the polymer with cationic functionality being obtained by (co)polymerization in an aqueous medium of olefinically unsaturated (co)monomers, wherein at least one (co)monomer has a cationic functionality, further (co)monomers are added and polymerization takes place in the presence of suitable initiators, and by drying the aqueous dispersion obtained, the (co)polymerizate having one or more reactive groups. According to another embodiment, the polymer with cationic functionality is formed in situ in the presence of a seed. According to another embodiment, the process is controlled in such a way that a (co)polymerizate particle with heterogeneous morphology is formed. The invention also relates to the aqueous dispersions, a process for the preparation of the redispersible powder and the use thereof.

Abstract: Process to generate a water based adhesive by mixing a re-dispersible powder adhesive and water, optionally together with other components, characterized by mixing a re-dispersible powder adhesive, water and optionally other components such that the final water based adhesive contains a re-dispersed powder adhesive in an amount of about 0.5% to 80% by weight and has a Brookfield viscosity (23° C./20 RPM) from about 10 to 250000 mPas, wherein : the mixing is carried out as a micro-batch or a continuous process with a volume of the mixing chamber of about 0.001 to 200 litres and with a mixing time of about 0.01 to 500 seconds, and the ratio of the diameter of at least one mixer blade to the diameter of the mixing chamber is about 0.50 to 0.99.

Abstract: The invention relates to a redispersible powder obtainable by (co)polymerization, using a polymer with cationic functionality in an aqueous medium, optionally accompanied by the use of conventional additives, the polymer with cationic functionality being obtained by (co)polymerization in an aqueous medium of olefinically unsaturated (co)monomers, wherein at least one (co)monomer has a cationic functionality, further (co)monomers are added and polymerization takes place in the presence of suitable initiators, and by drying the aqueous dispersion obtained, the (co)polymerizate having one or more reactive groups. According to another embodiment, the polymer with cationic functionality is formed in situ in the presence of a seed. According to another embodiment, the process is controlled in such a way that a (co)polymerizate particle with heterogeneous morphology is formed. The invention also relates to the aqueous dispersions, a process for the preparation of the redispersible powder and the use thereof.

Abstract: The invention relates to a redispersible powder obtainable by (co)polymerization, using a polymer with cationic functionality in an aqueous medium, optionally accompanied by the use of conventional additives, the polymer with cationic functionality being obtained by (co)polymerization in an aqueous medium of olefinically unsaturated (co)monomers, wherein at least one (co)monomer has a cationic functionality, further (co)monomers are added and polymerization takes place in the presence of suitable initiators, and by drying the aqueous dispersion obtained, the (co)polymerizate having one or more reactive groups. According to another embodiment, the polymer with cationic functionality is formed in situ in the presence of a seed. According to another embodiment, the process is controlled in such a way that a (co)polymerizate particle with heterogeneous morphology is formed. The invention also relates to the aqueous dispersions, a process for the preparation of the redispersible powder and the use thereof.

Abstract: The invention relates to an additive for hydraulically setting systems based on modified polycarboxylates and water-soluble ethers of high polymeric polysaccharides, optionally containing further standard additives, characterized by a content of a) a water-soluble ether of cellulose or a cellulose-like compound with a viscosity of at least approximately 1,000 mPas, particularly at least approximately 2,000 mPas, measured as a 2% aqueous solution with a Brookfield viscosimeter at 20° C. and 20 rpm and b) a polycarboxylate, whose main chain is linked by means of ester, ether, imide and/or amide groups with polyethylene oxide-containing side chains. The invention also relates to hydraulic mixtures having a content of the above additive and the use thereof.

Abstract: Hydraulic fixing agent that is based on Portland cement, a sulphate and aluminum component that is usual in this system, and optionally other additives. This is characterized in that, according to DIN 18156 (Part 2, Sec. 5.2.2.2, 5.2.2.3a) and 5.2.2.4), the hydraulic fixing agent has (1) an adhesive pull strength of at least approximately 0.15 N/mm2 when acted upon by water for 40 hours and (2) an adhesive pull strength of at most approximately 0.10 N/mmyy2 when acted upon by an aqueous sulphate solution and/or an aqueous solution of an aluminum salt, each of which has a pH value of 12.5, for a period of 40 hours.

Abstract: The invention relates to a method for electrostatically attaching a polymeric polymer powder adhesive to a non-metallic substrate. The invention also relates to the substrate having deposited thereon by electrostatic means a polymer powder adhesive, which can be activated for adhesion or cohesion. The method is especially useful for depositing powdered adhesive onto paper or plastic, which can be activated by heat, water, radiation, or other means. The activated adhesive allows the non-metallic substrate to then adhere to another substrate, or to itself.

Abstract: The object of the invention is a redispersible material, particularly in powder form, which comprises a polymer containing silanol groups, the latter being provided with a protective group. The redispersible material can be in the form of a redispersible powder, an aqueous dispersion or an aqueous solution. The invention also makes available a process for the preparation of a redispersible material by reacting a silanol group-containing polymer with a compound having a protective function for the silanol groups, optionally with the subsequent recovery of a redispersible, pulverulent material from the polymer provided with the protective groups. The invention also relates to the use of the redispersible material in adhesives, plastic-containing, cement-bound systems, plastic-bound, cement-free binders, wallpaper pastes, disperse dyes, glass fibre composite systems, etc.

Abstract: The invention relates to a process for the preparation of aqueous dispersions of latex particles having a heterogeneous morphology by a semicontinuous emulsion polymerization, comprising the emulsion polymerizing of ethylenically unsaturated (co)monomers, accompanied by, the addition of cationic and/or anionic and/or nonionic emulsifiers and/or protective colloids as stabilizers, which are directly used as such or synthesized in situ, the semicontinuous emulsion polymerization being performed in the presence of the stabilizer or stabilizers with a monomer mixture, which a) contains at least one nonionic, ethylenically unsaturated monomer with a glass transition temperature Tg above about 30° C. in a quantity of about 10 to 70 wt. %, based on the total weight of ethylenically unsaturated (co)monomers and b) at least one hydrophilic, ethylenically unsaturated monomer in a quantity of about 5 to 30 wt. %, based on the total weight of ethylenically unsaturated (co)monomers.