The present invention relates to curable compositions which comprise (meth)acrylic monomers, ethylenically unsaturated oligomers and a specific multistage polymer additive. The additive is used as a processing aid to reduce cure shrinkage and reduce or prevent the formation of cracks during the polymerization of the composition.

The present invention relates to a water-based coating composition, the preparation and use of the composition, a two-component coating system comprising the composition and use thereof, and an article obtained by coating with the composition or the two-component coating system. The water-based coating composition comprises a water-based UV resin; a silane-treated nanosized silicon oxide compound; and a photoinitiator; wherein per kilogram of the solid constituent of the water-based UV resin contains not less than 3 mol of ethylenically unsaturated groups, and wherein the weight ratio of the solid constituent of the nanosized silicon oxide compound to the solid constituent of the water-based UV resin is 11:20 to 73:100. The coating layer formed by the water-based coating composition of the present invention has high hardness and good adhesion, and is particularly suitable for electronic, electrical and communication equipment in the 5G field.

Composites made of a cross-linked acrylic polymer and an inorganic aggregate and/or mineral, with the cross-linked acrylic polymer being present at a concentration of 5% to 17%, by weight, are disclosed. Processes of preparing the composites are also disclosed.

A method of servicing a wellbore penetrating a subterranean formation, comprising placing into the wellbore a cementitious composition comprising a crosslinked polymeric microgel, a clay, a cementitious material, and water. By incorporating the crosslinked polymeric microgel and the clay as disclosed herein, the cementitious composition can be used at relatively high temperatures.

A method of servicing a wellbore penetrating a subterranean formation, comprising placing into the wellbore a cementitious composition comprising a crosslinked polymeric microgel, a clay, a cementitious material, and water. By incorporating the crosslinked polymeric microgel and the clay as disclosed herein, the cementitious composition can be used at relatively high temperatures.

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.

A copolymer may be obtained by polymerization reaction(s) using an anionic monomer and two polyethoxylated monomers. Such copolymers may have a polydispersity index, determined by size exclusion chromatography (SEC), of less than 3, and be obtained by at least one radical polymerisation reaction in water at a temperature ranging from 10 to 90° C. A composition may include such copolymers. Such copolymers may be prepared and use as a superplasticizer for a hydraulic binder composition.

Hydrocarbon swelling particles for wellbore cementing include a crosslinked polymer comprising vinyl aromatic monomer and/or (meth)acrylic monomer.

A cement composition can include: water; cement, wherein less than 75 w/w % of the total amount of the cement is Portland cement; and a fluid loss additive, wherein the fluid loss additive comprises a polymer network having at least one branching point formed with a monomer and a cross-linking agent that comprises at least three active functional groups. The cement can also be a non-Portland cement. The monomer can be a vinyl ester-based monomer that is polymerized with the cross-linking agent to form the polymer network. The cement composition can be used in an oil and gas operation.

Described is a method of manufacturing a binder and the use of the binder to manufacture a roading mixture through mixing with aggregate, or a composite plastic product through the mixture of binder with particulate matter and/or fibre. The binder comprises mixing a plastic with two or more ethylenically unsaturated monomers in a mixing tank. The two or more ethylenically unsaturated monomers may have different homopolymer glass transition temperatures (TO wherein a first monomer structural unit has a homopolymer T.sub.g of greater than 80° C. and a second monomer having a homopolymer T.sub.g of less than 80° C. The plastic may be selected from a plastic comprising a styrene homopolymer, a styrene copolymer, a copolymer of an alkene and vinyl acetate, acrylic polymer and nylon based polymers or co-polymers, polyester-based thermoplastic polymer resin, propylene-based thermoplastic polymer and homo-polymer of an alkene or combination thereof.