The present invention aims to provide an adhesive tape excellent in resistance against sebum to be able to maintain its adhesive force even when applied to a part frequently touched with human hands, and an adhesive tape for fixing electronic device component and a transparent adhesive tape for optical use each provided with the adhesive tape. The present invention relates to an adhesive tape including an adhesive layer containing an acrylic adhesive, the adhesive layer having a swelling ratio of 100% or more and 130% or less after immersion in oleic acid under the conditions of a temperature of 60 C. and a humidity of 90% for 24 hours.

The present invention aims to provide an adhesive tape excellent in resistance against sebum to be able to maintain its adhesive force even when applied to a part frequently touched with human hands, and an adhesive tape for fixing electronic device component and a transparent adhesive tape for optical use each provided with the adhesive tape. The present invention relates to an adhesive tape including an adhesive layer containing an acrylic adhesive, the adhesive layer having a swelling ratio of 100% or more and 130% or less after immersion in oleic acid under the conditions of a temperature of 60 C. and a humidity of 90% for 24 hours.

An acrylic rubber composition comprising 5 to 12.5 parts by weight of silica and 5 to 15 parts by weight of graphite as fillers, based on 100 parts by weight of ultracold-resistant acrylic rubber having a glass transition point Tg of 42 C. or less. Due to the use of ultracold-resistant acrylic rubber, the use environment temperature, i.e., 30 to +150 C., is satisfied. In addition, the respective use of specific amounts of silica and graphite as fillers allows the formation of bonded piston seals that have roll processability and adhesion equivalent to or higher than those of the existing seals, and that satisfy compression set characteristics.

An acrylic rubber composition comprising 5 to 12.5 parts by weight of silica and 5 to 15 parts by weight of graphite as fillers, based on 100 parts by weight of ultracold-resistant acrylic rubber having a glass transition point Tg of 42 C. or less. Due to the use of ultracold-resistant acrylic rubber, the use environment temperature, i.e., 30 to +150 C., is satisfied. In addition, the respective use of specific amounts of silica and graphite as fillers allows the formation of bonded piston seals that have roll processability and adhesion equivalent to or higher than those of the existing seals, and that satisfy compression set characteristics.

Described herein is a low molecular weight fluorinated (meth)acrylate polymer comprising a plurality of pendent sulfonylamide groups, which is used as a tackifier in a pressure sensitive adhesive composition. Also described herein is a pressure sensitive adhesive composition comprising the low molecular weight fluorinated (meth)acrylate polymer, and articles comprising the pressure sensitive adhesive composition. The pressure sensitive adhesive preferably also comprises a high molecular weight polymer, which is derived from a (meth)acrylate monomer or is a fluoropolymer.

Described herein is a low molecular weight fluorinated (meth)acrylate polymer comprising a plurality of pendent sulfonylamide groups, which is used as a tackifier in a pressure sensitive adhesive composition. Also described herein is a pressure sensitive adhesive composition comprising the low molecular weight fluorinated (meth)acrylate polymer, and articles comprising the pressure sensitive adhesive composition. The pressure sensitive adhesive preferably also comprises a high molecular weight polymer, which is derived from a (meth)acrylate monomer or is a fluoropolymer.

Embodiments of an optical adhesive are provided. The optical adhesive includes about 20% to about 60% by volume of first monomers. The first monomers have at least two acrylate or methacrylate groups. The optical adhesive also includes about 40% to about 80% by volume of second monomers. The second monomers have at least one fluorine atom and at least one acrylate or methacrylate group. The optical adhesive has a refractive index of from about 1.40 to about 1.55, and in the temperature range of about 10 C. to about 85 C., the refractive index of the optical adhesive has a thermal drift do/dT of less than about 410.sup.4/ C. Embodiments of a mechanical joint between two optical fiber segments using the optical adhesive and embodiments of a method for joining two optical fiber segements are also provided.

Embodiments of an optical adhesive are provided. The optical adhesive includes about 20% to about 60% by volume of first monomers. The first monomers have at least two acrylate or methacrylate groups. The optical adhesive also includes about 40% to about 80% by volume of second monomers. The second monomers have at least one fluorine atom and at least one acrylate or methacrylate group. The optical adhesive has a refractive index of from about 1.40 to about 1.55, and in the temperature range of about 10 C. to about 85 C., the refractive index of the optical adhesive has a thermal drift do/dT of less than about 410.sup.4/ C. Embodiments of a mechanical joint between two optical fiber segments using the optical adhesive and embodiments of a method for joining two optical fiber segements are also provided.

The present invention provides a window film, a manufacturing method thereof, and a display device including the same. The window film comprises: a basic material layer; a window coating layer formed on one surface of the basic material layer; and a back coating layer formed on the other surface of the basic material layer, wherein the window film has a relation of formula 1.

The present invention provides multifunctional monomers, including, but not limited to include multifunctional methylene malonate and methylene beta-ketoester monomers; methods for producing the same; and compositions and products formed therefrom. The multifunctional monomers of the invention may be produced by transesterification or by direct synthesis from monofunctional methylene malonate monomers or methylene beta-ketoester monomers. The present invention further compositions and products formed from methylene beta-ketoester monomers of the invention, including monomer-based products (e.g., inks, adhesives, coatings, sealants or reactive molding) and polymer-based products (e.g., fibers, films, sheets, medical polymers, composite polymers and surfactants).