A gas barrier film including a substrate film containing a resin, and a gas barrier layer that has oxygen barrier properties and is in contact with at least one surface of the substrate film, a surface of the gas barrier layer has a flat portion, and a plurality of protrusions that protrude from the flat portion. The number of protrusions that satisfy the following formula (1) is 0 to 200 per mm.sup.2, and the number of protrusions that satisfy the following formula (2) is 20 or more per mm.sup.2; d×2≤f(1); and 0.2≤f<d×2(2), where d represents a thickness (μm) of the gas barrier layer, and f represents a height (μm) of each of the plurality of protrusions.

A water-based protective film which is largely immune to static electricity includes 60 to 70 parts of a water-based polyurethane by weight, 12 to 17 parts of an emulsion dispersant by weight, 3 to 8 parts of an antistatic agent by weight, and 10 to 20 parts of water by weight. A preparation method of the water-based protective film is also disclosed, the water-based protective film, which is in a form of slurry before drying, can be applied to an object surface by spraying, by immersion, or by brushing.

A thin self-supporting adhesive film is claimed that includes a first polyurethane and a solid surface-deactivated isocyanate.

A grain-finished leather-like sheet includes: a fiber base material; a polyurethane skin layer bonded to one surface of the fiber base material; and a polyurethane adhesion layer that bonds the fiber base material and the polyurethane skin layer to each other. The polyurethane adhesion layer includes an aqueous polyurethane as a main component and contains 0.01 to 0.45 mass % in sulfur atoms content, of a sulfate or an alkyl sulfate. The polyurethane adhesion layer exhibits coloration equivalent to pH 4.8 or less that is caused by a BCG (bromocresol green) solution.

Foamable waterborne dispersions which form stable flexible foams under ambient cure conditions are disclosed, said foamable waterborne dispersions comprising: a polyurethane polymer formed from one or more aliphatic or cycloaliphatic polyisocyanate and at least two different polymeric polyol components selected from polyether polyol, polyester polyol, and polycarbonate polyol; wherein the ambient cure conditions include a temperature of from 4° C. to 32° C., and a humidity of 0% relative humidity to 90% relative humidity. Also disclosed are the flexible foams produced from the foamable waterborne dispersions, as well as methods of providing a space filling layer or space filling volume adjacent to or on a surface, said methods comprising applying to said surface a foamed sample of the foamable waterborne dispersions, and allowing the foamed sample of foamable waterborne dispersion to dry under ambient conditions to yield a stable flexible foam.

An anti-fouling coating is provided, containing a continuous matrix comprising a first component; a plurality of inclusions comprising a second component, wherein the first component is a low-surface-energy polymer having a surface energy, and the second component is a hygroscopic material containing one or more ionic species. The low-surface-energy polymer and the hygroscopic material are chemically connected ionically or covalently, such as in a segmented copolymer composition comprising fluoropolymer soft segments and ionic species contained within the soft segments. The continuous matrix and the inclusions form a lubricating surface layer in the presence of humidity. Coefficient-of-friction experimental data is presented for various sample coatings. The incorporation of ionic species into the polymer chain backbone increases the hygroscopic behavior of the overall structure. Improvement in lubrication enables material to be cleared from a surface using the natural motion of an automotive or aerospace vehicle.

A coating composition including at least one water-based anionic polyurethane dispersion and 0.1 to 4 weight-% of nanoparticulate TiO.sub.2 having an average particle size of not more than 100 nm, based on the solids content of the coating composition. The cured coating composition is suitable as a top coat in a decorative multilayer coating system including at least one polyurethane base coat. The multilayer coating system exhibits improved non-yellowing property and cleanability. The liquid multilayer coating system is particularly suitable for balcony applications.

A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.

The present invention provides a laminated polypropylene film having good transferability and adhesiveness to printing ink, less electrically charged, and excellent in transparency. The laminated polypropylene film includes a resin layer on at least one side of a polypropylene film substrate, and the resin layer includes at least a polyurethane resin, an ethylene-based copolymer resin and an antistatic agent; and the ethylene-based copolymer is 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the polyurethane resin.

A gas barrier film including a substrate film containing a resin, and a gas barrier layer that has oxygen barrier properties and is in contact with at least one surface of the substrate film, a surface of the gas barrier layer has a flat portion, and a plurality of protrusions that protrude from the flat portion. The number of protrusions that satisfy the following formula (1) is 0 to 200 per mm.sup.2, and the number of protrusions that satisfy the following formula (2) is 20 or more per mm.sup.2: d×2≤f (1); and 0.2≤f<d×2 (2), where d represents a thickness (μm) of the gas barrier layer, and f represents a height (μm) of each of the plurality of protrusions.