Removable, aqueous-based compositions, especially sealants useful for, inter alia, temporary craft applications and seasonal weatherization of buildings and methods of their use are disclosed. These sealants reduce the flammability risks and lingering odor problems associated using solvent-based systems, particularly during application. These compositions do not rely on additives that disrupt the adhesion of the compositions to the substrate and that leave undesirable residue on the substrate.

Removable, aqueous-based compositions, especially sealants useful for, inter alia, temporary craft applications and seasonal weatherization of buildings and methods of their use are disclosed. These sealants reduce the flammability risks and lingering odor problems associated using solvent-based systems, particularly during application. These compositions do not rely on additives that disrupt the adhesion of the compositions to the substrate and that leave undesirable residue on the substrate.

We describe a new approach to fabricate polymeric materials with surface structures for applications as anti-reflective, anti-icing, superhydrophobic, superhydrophilic, de-wetting, and self-cleaning coatings. In some variations, a surface-textured layer comprises first microdomains and second microdomains each containing polymerized cross-linkable photomonomer, where the first microdomains have a higher average cross-link density than that of the second microdomains. The first microdomains and the second microdomains are in a peak-valley surface topology, providing surface texture with no filler particles. In some variations, a method to fabricate a surface-textured layer comprises: applying a cross-linkable photomonomer layer to a reflective substrate; exposing the photomonomer layer to a collimated light beam with no spatial variation, to initiate polymerization in first microdomains; and polymerizing other regions of the photomonomer layer to form second microdomains that are spatially separated from the first microdomains. The first microdomains have a higher average cross-link density compared to the second microdomains.

We describe a new approach to fabricate polymeric materials with surface structures for applications as anti-reflective, anti-icing, superhydrophobic, superhydrophilic, de-wetting, and self-cleaning coatings. In some variations, a surface-textured layer comprises first microdomains and second microdomains each containing polymerized cross-linkable photomonomer, where the first microdomains have a higher average cross-link density than that of the second microdomains. The first microdomains and the second microdomains are in a peak-valley surface topology, providing surface texture with no filler particles. In some variations, a method to fabricate a surface-textured layer comprises: applying a cross-linkable photomonomer layer to a reflective substrate; exposing the photomonomer layer to a collimated light beam with no spatial variation, to initiate polymerization in first microdomains; and polymerizing other regions of the photomonomer layer to form second microdomains that are spatially separated from the first microdomains. The first microdomains have a higher average cross-link density compared to the second microdomains.

Provided is an aqueous resin composition that is capable of forming a film having excellent balance in solvent resistance, water resistance, flexibility, stretchability, and strength. An aqueous resin composition of the invention, contains: a composite resin (A); and an aqueous medium (B), in which the composite resin (A) has a polymer (A1) unit having a unit represented by Formula (1) and a polymer (A2) unit represented by Formula (3).

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[R.sup.1s each represent a hydrogen atom, a halogen atom, a phenyl group, or a methyl group. R.sup.2 represents a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms. R.sup.7 represents a ml-valent hydrocarbon group having 1 to 20 carbon atoms. R.sup.8 represents one type of R.sup.10[-L.sup.1-(R.sup.11—O—).sub.n1].sub.n2—; —O(—R.sup.11—CO—O).sub.n3—; —O(—R.sup.11—O—CO—R.sup.11—CO—O).sub.n4—; —O(—R.sup.11—O—CO—O).sub.n5—; —O(—R.sup.12).sub.n6—O—; —O—R.sup.11—O—, and a group obtained by combining such groups.]

An elastic body layer is composed of a conductive rubber composition containing an isoprene rubber, a rubber other than the isoprene rubber, and carbon black. The elastic body layer is phase-separated into a first rubber phase containing the isoprene rubber and a second rubber phase containing the rubber other than the isoprene rubber; in the range of a 5 μm×5 μm square of an arbitrary cross section of the elastic body layer, the area ratio of the first rubber phase is within a range of 10 to 90%. The resistance value of the elastic body layer is within a range of 1.0×10.sup.3 to 1.0×10.sup.6Ω. A surface layer contains an electronic conductive agent and a crosslinked body of at least one polyurethane resin of an ether polyurethane resin and a carbonate polyurethane resin, and the glass transition point of the surface layer is within a range of −10 to −70° C.

An elastic body layer is composed of a conductive rubber composition containing an isoprene rubber, a rubber other than the isoprene rubber, and carbon black. The elastic body layer is phase-separated into a first rubber phase containing the isoprene rubber and a second rubber phase containing the rubber other than the isoprene rubber; in the range of a 5 μm×5 μm square of an arbitrary cross section of the elastic body layer, the area ratio of the first rubber phase is within a range of 10 to 90%. The resistance value of the elastic body layer is within a range of 1.0×10.sup.3 to 1.0×10.sup.6Ω. A surface layer contains an electronic conductive agent and a crosslinked body of at least one polyurethane resin of an ether polyurethane resin and a carbonate polyurethane resin, and the glass transition point of the surface layer is within a range of −10 to −70° C.

A solvent-free undercoat composition for corrosion control at welds and other repair sites on plastic-sheathed steel pipes with and without cathodic protection, including a component K1: a water-based rubber dispersion for formation of a barrier layer for isolating the metallic repair site from oxygen, water vapor and water penetrating from externally; a component K2: a water-based resin dispersion for adhesion on the metallic surface of the repair site and on the nonpolar surfaces of the plastic sheathing; a component K3: an aqueous emulsion of prehydrolyzed organofunctional silanes for accelerating the drying, for improving the adhesion to the metallic surface, particularly at elevated temperatures, and for increasing the resistance to cathodic disbondment.

A solvent-free undercoat composition for corrosion control at welds and other repair sites on plastic-sheathed steel pipes with and without cathodic protection, including a component K1: a water-based rubber dispersion for formation of a barrier layer for isolating the metallic repair site from oxygen, water vapor and water penetrating from externally; a component K2: a water-based resin dispersion for adhesion on the metallic surface of the repair site and on the nonpolar surfaces of the plastic sheathing; a component K3: an aqueous emulsion of prehydrolyzed organofunctional silanes for accelerating the drying, for improving the adhesion to the metallic surface, particularly at elevated temperatures, and for increasing the resistance to cathodic disbondment.

Resin compositions including (A) a hollow organic polymer particle, (B) an epoxy resin, and (C) a curing agent provide cured products having a superior smear removal properties.