A multilayer protective sheet material with an adhesive backing is both durable and easy to install and conforms FAA standards. This sheet material may also include on optional layer of colored pigment.

The composition includes at least 16 percent by weight of an acrylic monomer comprising a cycloalkyl group having up to 12 carbon atoms, an acrylic monomer having a carboxylic acid group, an acrylic monomer having a hydroxyl group, and a compound composed of divalent segments L and at least two X groups. The divalent segments L are represented by formula L. Each segment L is respectively directly bonded to two secondary N atoms, two tertiary N atoms, or a secondary and a tertiary N atom. Each R.sup.1 represents an alkylene group having from 1 to 4 carbon atoms, and at least some of the R.sup.1 groups are CH.sub.2CH.sub.2CH.sub.2CH.sub.2. Each X group is independently represented by the formula CH.sub.2C(R)C(O)OVWC(O). Articles and methods using the composition are also described.

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A method and apparatus for forming a tool. A film is applied to a reference part. A vacuum is applied to cause the film to conform to a surface of the reference part such that an adhesive side of the film faces outward from the reference part and a release side of the film conforms to and contacts the reference part. A plurality of composite plates is adhered to the adhesive side of the film over a plurality of flat portions of the reference part. An adhesive material is applied to fill in a plurality of gaps between the plurality of composite plates. The adhesive material is cured to form the tool.

Described herein are methods of forming uncured sealant assemblies and also methods of forming seals between various parts using such assemblies. In some examples, an uncured sealant assembly comprises two protective layers and an uncured sealant layer, disposed in between. The uncured sealant assembly is stored and provided at a cure-inhibiting temperature, selected to minimize the curing rate of the uncured sealant layer. The size and the shape of the uncured sealant layer are specifically selected to ensure the complete coverage of the faying surfaces, filling of all gaps and voids between the faying surfaces, and controlling the shape and size of uncured sealant squeeze out between the faying surfaces. In some examples, the size and shape of the uncured sealant layer maybe be specifically selected to have no uncured sealant squeeze out between parts.

Described is a fabric or flexible composite material for an inflatable safety product. The fabric or flexible composite material includes a substrate and a hot melt adhesive on the substrate. The substrate and hot melt adhesive may include a same base polymer. A method of forming an inflatable safety product includes forming a fabric or flexible composite material by applying a hot melt adhesive to a substrate using heat and pressure.

A thermoreversible urethane-based adhesive composition comprising the reaction product of a multifunctional maleimide species and a furan-endcapped prepolymer, wherein the furan-endcapped prepolymer comprises the reaction product of a monofunctional furan species and an isocyanate-terminated prepolymer, wherein the isocyanate-terminated prepolymer comprises the reaction product of a diisocyanate and a difunctional oligomer that is terminated at a first end with an alpha moiety, wherein the alpha moiety is a hydroxyl group or an amine group, and that is terminated at a second end, opposed from the first end, with an omega moiety, wherein the omega moiety is a hydroxyl group or an amine group.

A method of making an adhesive for an ice protection assembly includes mixing ferrous nanoparticles into the adhesive. Removal of the adhesive for ice protection assembly inspection or repair includes heating the ferrous nanoparticles in the adhesive to soften the adhesive and allow for easy removal or repositioning of the ice protection assembly.

In a first aspect of the invention there is provided a bondline structure for bonding a shear web to a wind turbine blade shell. The bondline structure comprises an elongate inner core made from a deformable material, and one or more outer layers comprising reinforcing fibres at least partially surrounding the inner core. The inner core and/or the one or more outer layers comprise an adhesive.

Adhesive formulations for forming a fluorinated poly(imide-phthalonitrile) thermoset polymer are provided. Such an adhesive formulation may comprise a fluorinated imide-phthalonitrile oligomer having Formula IV ##STR00001##
wherein R.sub.1 is an unsubstituted or substituted aryl group and does not comprise an ether group; R.sub.2 is an unsubstituted or substituted aryl group and does not comprise an ether group; at least one of R.sub.1 and R.sub.2 comprises a fluorine substituent; and n has a value of from 1 to 30.

A method for nano-depth surface activation of a PTFE-based membrane and relates to the technical field of polymer composites is disclosed. The method comprises the following steps: covering a functional surface of a PTFE-based nano functional composite membrane, performing surface activation treatment on a single surface of the membrane to which a bonding adhesive is applied, and migrating and complexing a high-toughness cold bonding adhesive tape on the membrane surface, with an activated structure layer, of the PTFE-based nano functional composite membrane through a mechanical adhesive applying device to form an adhesive-membrane complex. An extremely strong affinity and a high-strength bonding performance are generated between the membrane and the adhesive, and the adhesive-membrane complex is formed. Integration of membrane/adhesive bonding complexing, membrane/membrane bonding complexing and membrane/adhesive layer bonding is realized.