Sika Technology

The present invention relates to building materials based on clay containing soil and methods of manufacturing solid construction materials based on clay containing soil. The present invention uses a combination of polyalykoxylated polymers and divalent cations to improve the workability of materials based on clay containing soil.

The invention is directed to a pigmented self-healing coating composition comprising polyurea microcapsules with a core having an inorganic porous material impregnated with vegetable oil. This inventive coating composition is designed to offer enhanced protective properties and self-repair capabilities for various substrates, especially concrete and steel. The invention further relates to a coated substrate, a method for self-healing said substrate, and the use of the self-healing composition to self-repair damages on the surface of the coated substrate. Described is also the process for synthesis of polyurea microcapsules for use in pigmented self-healing coating compositions, especially epoxy and epoxy-sulphide based coating compositions.

The subject of the invention is a water-based coating composition comprising at least one polyurethane dispersion, at least one polyisocyanate and at least one polysiloxane hybrid dispersion, whereby the weight ratio between the solids content of the polyurethane dispersion and the solids content of the polysiloxane hybrid dispersion is 25/75 to 75/25. The water-based coating composition is very elastic with a high strength at high elongation together with a high gloss and good resistance against harsh ambient conditions. It is particularly suitable for the waterproofing of a low slope roof without the need to be overcoated with a topcoat.

A root barrier membrane comprises:a) an upper layer (1) based on a first bitumen composition comprising, based on the total weight of the first bitumen composition:- at least 35 wt.%, especially at least 50 wt.%, of bitumen and- at least 5 wt.% of an amorphous polyolefin (APO);b) a lower layer (2), based on a second bitumen composition comprising, based on the total weight of the second bitumen composition:- at least 35 wt.%, especially at least 50 wt.%, of bitumen,- at least 1 wt.% of at least one styrene block copolymer,- a root inhibition agent;whereby the first composition of the upper layer (1) is different from the second composition of the lower layer (2)

The present invention relates to the field of hydraulic binder compositions and building materials comprising de-lithiated beta-spodumene and comprising at least one activator selected from the group consisting of alkali metal sulfate, alkali metal chloride, alkaline earth metal chloride, and mixtures thereof.

The invention relates to a method for filling cavities in water-absorbing materials, especially in clay bricks, with an expanded mineral binder composition or for filling cavities in non-water-absorbing materials where the cavity is oriented non-horizontally, especially in supports such as columns, with an expanded mineral binder composition, and to a device for filling such cavities.

The present invention relates to a dry cementitious composition, especially a thermally conductive dry cementitious composition, comprising at least one type of metal powder and at least one type of carbonaceous particles, especially wherein the metal powder is iron powder, and wherein the carbonaceous particle is carbon fiber and/ or graphene oxide.

The invention relates to a two-component polyurethane composition with latent water which is suitable for printing-sleeve applications, wherein the post-curing of the cured polyurethan is improved, comprising in a first component at least one polyol; at least one drying agent and in a second component at least one isocyanate, characterized in that the first component contains latent water reversibly bound by the drying agent.Further aspects of the invention include the use of the inventive composition as an adhesive coating, in particular in printing application, a method of coating and an article obtained from said method.

The present invention relates to the use of a curable polymeric binder composition for the manufacture of 3D articles by an additive manufacturing process comprising applying the curable polymeric binder composition with a movable print head of multi-axis additive manufacturing device, the movable print head having a discharge nozzle for the layer-by-layer application of the curable polymeric binder composition, wherein the curable polymeric binder composition exiting from the discharge nozzle has a viscosity between 3000 and 50000 Pa·s, preferably 4000 and 30000 Pa·s, more preferably 5000 and 20000 Pa·s, wherein the viscosity is measured 5 seconds after the composition exits the discharge nozzle on a plate-plate rheometer at and a constant temperature of 20°C and 50% relative humidity.The use according to the invention enables 3D printing of thermoset materials with unprecedented flexibility and structural complexity.

The invention relates to a thermosetting one-component epoxy resin composition comprising at least one liquid epoxy resin A1, at least one liquid epoxy resin A2, at least one curing agent B for epoxy resins, at least one core-shell polymer D1 and at least one terminally blocked polyurethane polymer D2. The weight ratio of the sum of the at least one liquid epoxy resin A1 and the at least one liquid epoxy resin A2 to the sum of the at least one core-shell polymer D1 and the at least one terminally blocked polyurethane polymer D2 ((A1+A2) / (D1+D2)) is from 0.75 - 3. The epoxy resin compositions have good lap shear strength and impact peel values, as well as before and after cataplasm treatment.