Abstract: The object of the invention is to provide a rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, suitable for radiation treatments to be carried out for the purpose of sterilizing. Accordingly, the present invention provides a rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, comprising an isobutylene copolymer, as a predominant component, with a density of at most 0.95, capable of being readily subjected to a radiation treatment.

Abstract: The present invention aims at providing an improved thermoplastic film-laminated rubber stopper for a medicament vial, having more sufficient and excellent sealing property as well as barrier effect of permeation, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film, in particular, tetrafluoroethylene resin film, having a flexural modulus in a range of at most 600 MPa and a coefficient of kinetic friction in a range of at most 0.4.

Abstract: The object of the invention is to provide a rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, suitable for radiation treatments to be carried out for the purpose of sterilizing.

Abstract: The present invention aims at providing an improved thermoplastic film-laminated rubber stopper for a medicament vial, having more sufficient and excellent sealing property as well as barrier effect of permeation, in which the whole lower surface or the whole lower surface and a part of the upper surface of the rubber body is laminated with a thermoplastic film, in particular, tetrafluoroethylene resin film, having a flexural modulus in a range of at most 600 MPa and a coefficient of kinetic friction in a range of at most 0.4.

Abstract: There can be provided a sealing stopper for a syringe, having very high sealing property and sliding property, and a prefilled syringe using this sealing stopper and capable of preserving a medicament for a long time and operating in easy and precise manner during injecting. This syringe is also excellent in sanitary and operating property during a step of formulation or preservation of a medicament. In this sealing stopper for a syringe, a surface of the rubber body is laminated with a tetrafluoroethylene resin film or ultra-high molecular weight polyethylene film having an average roughness Ra on the central line of the surface in a range of at most 0.05 .mu.m and a kinematic friction coefficient of at most 0.2.

Abstract: There is provided a rubber composition and a rubber article for pharmaceutical chemicals or medical treatments, obtained by forming and cross-linking this rubber composition, the rubber article having very excellent properties which can be adapted to the standard test values of various official documents, required in this field, and can further satisfy the test items having lately become an important problem from the pharmaceutical standpoint. This rubber composition comprises 0.3 to 3.5 parts by weight of an organic peroxide cross-linking agent, 0.3 to 4 parts by weight of an organic compound having at least 2 maleimide groups in one molecule and optionally, 0.6 to 30 parts by weight of an organosilicone compound per 100 parts by weight of a isobutylene-isoprene copolymer rubber.

Abstract: A sanitary rubber article coated with a film composed of a siloxane composition comprising the following Component A and the following Component B, Component B being present in a proportion of 0.1 to 5 parts by weight to 100 parts by weight of Component A:Component Aat least one organosiloxane having a recurring unit represented by the following General Formula (I): ##STR1## Component B at least one of organopolysiloxanes having a recurring unit represented by the following General Formula (II): ##STR2## wherein R.sub.1 to R.sub.5, n, x and y are defined in the specification.

Abstract: The present invention provides sanitary laminated rubber articles suitable for use as various articles with safety and sanitary property, for example, containers for foods or pharmaceutical chemicals, transporters, instruments, packaging materials and the like. In this sanitary laminated article, the rubber surface is laminated with a resin film comprising a cyclic olefinic compound or bridged polycyclic hydrocarbon compound as a polymeric component.

Abstract: An anti-inflammatory cosmetic composition having a large effect of absorbing and shielding all of UV-A, UV-B and UV-C, small degeneration with the passage of time even upon absorption of light, small influence upon the skin, not lowered effect of absorbing light and high stability for heat is provided. This anti-inflammatory cosmetic composition comprises 0.1 to 20% by weight of a hydroxyaryl-s-triazine compound represented by the following structural formula in a cosmetically acceptable oil carrier: ##STR1## wherein R.sub.1 and R.sub.2 represent, same or different, hydrogen atoms, chlorine atoms, hydroxyl groups, alkoxy groups of 1 to 18 carbon atoms, aryloxy groups of 6 to 8 carbon atoms or mono- or dialkylamino groups containing 1 to 4 carbon atoms and R.sub.3 and R.sub.4 represent, same or different, hydrogen atoms, chlorine atoms, alkyl groups of 1 to 8 carbon atoms, methoxy groups or ethoxy groups.

Abstract: A sanitary rubber article having an improved surface property to be useful as rubber parts of medical instruments or machines and as rubber articles for medicaments is provided. This sanitary rubber article is coated, through bridging and bonding, with a modified polysiloxane composition comprising a modified polysiloxane having at least one modifying group selected from the group consisting of alkenyl, acryloyl, vinyloxy, maleimide and phenylketone groups in the molecule.

Abstract: A sanitary rubber article having an improved surface property to be useful as rubber parts of medical instruments or machines and as rubber articles for medicaments is provided. This sanitary rubber article is coated, through bridging and bonding, with a modified polysiloxane composition comprising a modified polysiloxane having at least one modifying group selected from the group consisting of alkenyl, acryloyl, vinyloxy, maleimide and phenylketone groups in the molecule.

Abstract: A laminated sliding stopper for a syringe, excellent in sliding or moving property and free from contamination of an injection liquid, is provided which consists of a rubber elastic body whose part to be contacted with the injection liquid and sliding part on the inner wall of the barrel are fully laminated with a film of tetrafluoroethylene.