A coating agent for preventing the adsorption of extracellular vesicles represented by exosomes to a tool has been developed. Adsorption of extracellular vesicles to a tool can be prevented by using a coating agent which contains a hydrophilic polymer having a weight average molecular weight of 10,000 or more and 1,000,000 or less, wherein a coated layer formed by the coating agent has a contact angle of 0 degree or more and 30 degrees or less.

Provided is an antifouling coating composition, which can form a coating film having good hardness and good physical properties and having a wear degree appropriate for expressing a long-term antifouling effect, has a viscosity not being excessively high, and makes it possible to reduce a content of volatile organic compounds, and a polymer-containing composition which is suitable for obtaining the antifouling coating composition. The polymer-containing composition contains a (meth)acryl-based copolymer (A-1), in which the (meth)acryl-based copolymer (A-1) contains a constitutional unit (U11) or a constitutional unit (U12) having carboxylate forming an ionic bond with a divalent metal atom, and has a weight-average molecular weight of 1,000 to 5,000, and the polymer-containing composition has a coating film hardness (Martens hardness) equal to or higher than 2.5 N/mm.sup.2.

The present invention provides an antifouling film that is excellent in antifouling properties, rubbing resistance, and adhesion. The antifouling film includes: a substrate; and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light, the polymer layer being a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active components, 30 to 80 wt % of a polyfunctional acrylate, 10 to 30 wt % of a monofunctional amide monomer, 0.5 to 10 wt % of a fluorine-based release agent, and 5 to 30 wt % of a vinyl-based polymer containing a repeat unit represented by a predetermined formula.

The invention provides an antifouling paint composition comprising at least one compound (A) selected from the group consisting of compounds represented by Formula (1), Formula (2), and Formula (3); and a vinyl-based copolymer (B).

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The disclosure relates to an article comprising a substrate and an antifog coating layer provided on at least one surface of the substrate. The antifog coating layer comprises a sulfonated styrenic block copolymer (SSBC) having a block A, a block B, and a block D. Block A is a polymer block resistant to sulfonation and derived from a para-substituted styrene monomer, block B is a polymer block susceptible to sulfonation and derived from a vinyl aromatic monomer, and block D is a polymer block resistant to sulfonation and derived from a conjugated diene monomer. The antifog coating layer provides long-term antifog as well as anti-microbial protection properties. The selection of a specific solvent system can modify the SSBC film morphology leading to enhanced antifog property. The antifog coating layer adheres well to targeted substrates and has abrasion resistance property.

A method for preparing a transparent fluorine-free, super-lubricating and oil-proof coating includes: dissolving a sulfhydryl compound, a styrene copolymer, a low surface energy component, and a photoinitiator in an organic solvent, conducting a uniform stirring to obtain a mixture, coating the mixture onto a substrate, and conducting a curing under an ultraviolet lamp to obtain the transparent fluorine-free, super-lubricating and oil-proof coating. The coating has excellent adhesion resistance to various organic solvents with low surface tension and even liquids with high viscosity, and has excellent chemical stability and mechanical durability. The coating can be applied to various substrates such as glass, an aluminum sheet, a steel sheet, and a polymer without limitations of a use environment, maintains excellent adhesion resistance in the environment of air, oil, and water, and has wide applicability. Moreover, according to the method, various ways such as spraying, dip-coating and spin-coating can be used.

A non-fluorinated block copolymer including at least one block segment (A), wherein the block segment (A) includes a repeating unit formed from one or more types of acrylic monomers having a long-chain hydrocarbon group containing 7-40 carbon atoms. The non-fluorinated block copolymer preferably contains a segment (B) constituted by at least one of: (B1) a block segment including a repeating unit, different from that of segment (A), that is formed from an acrylic monomer having a long-chain hydrocarbon group comprising 7-40 carbon atoms; (B2) a block segment including a repeating unit formed from an acrylic monomer not having a long-chain hydrocarbon group; and (B3) a random segment formed from at least two types of acrylic monomers.

Provided are a copolymer containing: a structural unit (A) derived from a polymerizable monomer (a) having a silicon atom-containing group represented by formula (1) [wherein R.sup.1, R.sup.2, and R.sup.3 each independently represent a hydrocarbon group having a carbon number of 1 to 6]; and a structural unit (B) derived from a polymerizable monomer (b) copolymerizable with the polymerizable monomer (a) with the content of the structural unit (A) being from 40 mass % to 80 mass % in 100 mass % of the copolymer, the content of the structural unit (B) being from 20 mass % to 60 mass % in 100 mass % of the copolymer, and an acid value derived from free carboxy group being from 0.1 KOHmg/g to 60 KOHmg/g.; and an antifouling coating composition containing the copolymer.

The invention provides a highly durable surface coating intended to inhibit the formation of ice at sub-0 C. temperatures as well as reduce the accumulation of dirt and insect debris to a vehicle surface upon impact. A continuous, durable matrix surrounds both low-surface-energy (low-adhesion) material inclusions as well as hygroscopic material inclusions. Some variations provide a low-friction, low-adhesion material comprising: a durable continuous matrix; a plurality of first inclusions, dispersed within the matrix, each comprising a low-surface-energy polymer; and a plurality of second inclusions, dispersed within the matrix, each comprising a hygroscopic material. The matrix and the first and second inclusions form a lubricating surface layer in the presence of humidity. Other variations employ a durable continuous matrix and a plurality of inclusions, dispersed within the matrix, each comprising a low-surface-energy polymer surrounding a hygroscopic material. Coating precursors and methods of forming final coatings are also described.

The invention provides a highly durable surface coating intended to inhibit the formation of ice at sub-0 C. temperatures as well as reduce the accumulation of dirt and insect debris to a vehicle surface upon impact. A continuous, durable matrix surrounds both low-surface-energy (low-adhesion) material inclusions as well as hygroscopic material inclusions. Some variations provide a low-friction, low-adhesion material comprising: a durable continuous matrix; a plurality of first inclusions, dispersed within the matrix, each comprising a low-surface-energy polymer; and a plurality of second inclusions, dispersed within the matrix, each comprising a hygroscopic material. The matrix and the first and second inclusions form a lubricating surface layer in the presence of humidity. Other variations employ a durable continuous matrix and a plurality of inclusions, dispersed within the matrix, each comprising a low-surface-energy polymer surrounding a hygroscopic material. Coating precursors and methods of forming final coatings are also described.