Water-responsive actuators and methods for creating water responsive actuators are disclosed. In some embodiments, the disclosed subject matter includes a first layer, for example a plastic tape, and a second layer, for example bacterial spores and cured adhesive. The second layer can be created in a pattern. The pattern can include joints, which can contract when exposed to dry air and can thereby bend the actuator, and can expand when exposed to humid air and thereby return the actuator its original position.

A thermally releasable adhesive member includes a base resin and microcapsules dispersed in the base resin. At least one of the microcapsules includes a shell part which comprises a hydrophobic polymer material, and a hollow part which is defined by the shell part and contains an organic solvent.

Embodiments are generally directed to dielectric film with pressure sensitive microcapsules of adhesion promoter. An embodiment of an apparatus includes a dielectric film, the dielectric film including a dielectric material layer; a layer of pressure sensitive microcapsules on a first side of the dielectric material layer, the microcapsules including an adhesion promoter; and a cover material on the layer of microcapsules. The pressure sensitive microcapsules are to rupture upon application of a certain rupture pressure.

Embodiments are generally directed to dielectric film with pressure sensitive microcapsules of adhesion promoter. An embodiment of an apparatus includes a dielectric film, the dielectric film including a dielectric material layer; a layer of pressure sensitive microcapsules on a first side of the dielectric material layer, the microcapsules including an adhesion promoter; and a cover material on the layer of microcapsules. The pressure sensitive microcapsules are to rupture upon application of a certain rupture pressure.

A microcapsule for use with an underwater adhesive includes a shell including nanoclay platelets and a polyurea product of an interfacial polymerization of a polyamine and an aromatic polyisocyanate. The microcapsule further includes a core composition encapsulated by the shell. The core composition includes a base catalyst for formation of a polyurethane, a polyol, and a hydrophilic solvent.

The present invention relates to a pressure sensitive adhesive composition comprising: (i) at least one butene-1 (co)polymer; (ii) at least one liquid tackifier; (iii) at least one solid tackifier; (iv) at least one styrene copolymer; (v) optionally at least one further (co)polymer, different from (i) and (iv); (vi) optionally at least one additive. Furthermore, the use of the pressure sensitive adhesive composition according to the invention as closing mean for a packaging unit for foods, for packaging units to be heated in a microwave or oven, for a closing mean for packaging unit for drugs, hygienic tissues, cleaning tissues or cosmetic tissues. An article comprising the pressure sensitive adhesive composition according to the invention and a method of obtaining the article.

In certain embodiments, the disclosed sealant comprises a one-component, closed-cell, semi-foam, sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed sealant can also be formulated to be smoke-resistant and flame-resistant.

In certain embodiments, the disclosed sealant comprises a one-component, closed-cell, semi-foam, sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed sealant can also be formulated to be smoke-resistant and flame-resistant.

Compositions, articles, and methods involving pressure-sensitive adhesives comprising polymer-grafted particles are generally described.

A method for evaluating a binder includes disposing the binder on a first plate, bringing a second plate, which faces the first plate, into contact with one surface of the binder, applying a stress to the binder through the second plate, measuring a strain of the binder due to the applied stress, and calculating a curing rate of the binder based on the strain of the binder.