Abstract: Provided is a novel modified isobutylene-isoprene rubber (IIR).

Abstract: The present invention relates to an adhesive composition for optical use, which is applied to optical devices or display devices and thus may exhibit excellent adhesion performance while exhibiting a high barrier performance based on a low water vapor transmission rate, and may implement both excellent optical characteristics and durability, and specifically, provides an adhesive composition for optical use, the adhesive composition including: a thermally curable rubber including an isobutylene-isoprene rubber having a carboxyl group and an isobutylene-isoprene rubber having a hydroxy group; and a thermal crosslinking agent. Further, the present invention provides an adhesive film for optical use, including an adhesive layer including photocured products of the adhesive composition for optical use.

Abstract: The present invention relates to a method for preparing a (meth)acrylate group-containing benzophenone for an optical adhesive use, the method including: preparing a raw material composition by mixing a hydroxy group-containing benzophenone-based compound and a (meth)acrylate-based compound; and carrying out a reaction of the hydroxy group-containing benzophenone-based compound and the (meth)acrylate-based compound by introducing an enzyme catalyst into the raw material composition. Further, the present invention provides an optical adhesive composition including a (meth)acrylate group-containing benzophenone prepared by the preparation method and a derivative thereof.

Abstract: The present invention relates to an adhesive composition for optical use, which is applied to optical devices or display devices and thus may exhibit excellent adhesion performance while exhibiting a high barrier performance based on a low water vapor transmission rate, and may implement both excellent optical characteristics and durability, and specifically, provides an adhesive composition for optical use, the adhesive composition including: a thermally curable rubber including an isobutylene-isoprene rubber having a carboxyl group and an isobutylene-isoprene rubber having a hydroxy group; and a thermal crosslinking agent. Further, the present invention provides an adhesive film for optical use, including an adhesive layer including photocured products of the adhesive composition for optical use.

Abstract: The present invention provides an adhesive composition for optical use, which includes rubber and may be chemically cross-linked through an appropriate curing process, and as a result, may secure excellent long-term durability, water vapor transmission resistance, and chemical resistance, and includes an isobutylene-isoprene rubber having an acrylic acid ester-based functional group in a main chain thereof, a photoinitiator, and a tackifier in order to provide optical characteristics sufficient to be used for optical use. The present invention provides a method for preparing the adhesive composition for optical use, and it is possible to obtain the adhesive composition for optical use, which includes a chemically cross-linkable rubber by the method. Further, the present invention provides an adhesive film for optical use, and excellent long-term durability and optical characteristics may be implemented by applying the adhesive film for optical use to a wide range of electronic devices.

Abstract: A key assembly which is configured to provide improved click feeling to a user and an electronic device having the same are provided. The key assembly includes a key body of elastic materials and contact projections, each of the contact projections which is protruded and formed from the key body and presses a switch device spaced apart from the key body by a gap providing a certain interval, wherein the key body is installed such that a contact surface of each of the contact projections is in contact with and pushed back by a certain distance by a pre-loading force of the switch device.

Abstract: A key assembly which is configured to provide improved click feeling to a user and an electronic device having the same are provided. The key assembly includes a key body of elastic materials and contact projections, each of the contact projections which is protruded and formed from the key body and presses a switch device spaced apart from the key body by a gap providing a certain interval, wherein the key body is installed such that a contact surface of each of the contact projections is in contact with and pushed back by a certain distance by a pre-loading force of the switch device.

Abstract: A dual-axis hinge device in a portable apparatus is provided, in which a first hinge unit has a first driving cam for rotating upon a first hinge axis along with rotation of a second housing, and a second hinge unit having a second driving cam adapted to be engaged with the first driving cam rotating upon a second hinge axis parallel to the first hinge axis, while reciprocating along the second hinge axis.

Abstract: A sliding module for a portable terminal which has a first housing and a second housing sliding on the first housing is disclosed, the sliding module slidably coupling the first and second housings. The sliding module includes a sliding plate mounted on a surface of the first housing; at least one guide rod mounted on a surface of the second housing and slidably coupled to the sliding plate, the guide rod being extended in the longitudinal direction of the second housing; at least one first guide rib formed on the sliding plate; and at least one second guide rib formed on the surface of the second housing, wherein the second guide rib is slidably engaged with the first guide rib, and maintains at least partial engagement with the first guide rib within a sliding range of the second housing.

Abstract: A sliding module for a portable terminal which has a first housing and a second housing sliding on the first housing is disclosed, the sliding module slidably coupling the first and second housings. The sliding module includes a sliding plate mounted on a surface of the first housing; at least one guide rod mounted on a surface of the second housing and slidably coupled to the sliding plate, the guide rod being extended in the longitudinal direction of the second housing; at least one first guide rib formed on the sliding plate; and at least one second guide rib formed on the surface of the second housing, wherein the second guide rib is slidably engaged with the first guide rib, and maintains at least partial engagement with the first guide rib within a sliding range of the second housing.

Abstract: A port cover unit located on a preferred region of an electronic component for protecting various ports exposed at the outside of the component. The port cover unit includes a cover housing, a sliding cover slidably attached to an upper end of the cover housing for partially opening or closing the cover housing, and a stationary cover attached to the upper end of the cover housing. The stationary cover is aligned with the sliding cover or is placed below the sliding cover depending on the position of the sliding cover. The port cover unit can be easily made utilizing the injection molding, whereby aesthetic appearance of the port cover unit is improved.