Abstract: A battery-operated electric power tool (1) includes a light unit (11) disposed on the front end of the main housing (2) and extending along the underside of the gear housing (6). The light unit (11) includes a light source (12) in a casing with the light emitting end of the light source (12) exposed through a hole at the front of the unit (11). The electric power tool (1) further includes at the front portion of the gear housing (6) a bumper (13) made of a molded rubber containing selfiuminous pigment. While the electric power tool (1) is operated with the light source (12) on, the bumper (13) absorbs and stores part of the light from the light source (12) and emits light therefrom, enabling the user to locate the bumper (13) in darkness or a dimly lit work environment even after sustained use in darkness.

Abstract: A battery-operated impact driver (1) includes a light unit (11) disposed on the front end of the main housing (2) and extending along the underside of the gear housing (6). The light unit (11) includes a light source (12) in a casing with the light emitting end of the light source (12) exposed through a hole at the front of the unit (11). The impact driver (1) further includes at the front portion of the gear housing (6) a bumper (13) made of a molded rubber containing selfluminous pigment. While the impact driver (1) is operated with the light source (12) on, the bumper (13) absorbs and stores part of the light from the light source (12) and emits light therefrom, enabling the user to locate the bumper (13) in darkness or a dimly lit work environment even after sustained use in darkness.

Abstract: A process for preparing vinyl aromatic resin-, e.g. styrene-,based resinous materials to render them brittle and disintegratable upon prolonged exposure to ultraviolet light while retaining, in the absence of ultraviolet light, substantially the same appearance, processability and mechanical properties of conventional vinyl aromatic resin-based materials, comprising copolymerizing said vinyl aromatic monomer with from 0.5 to 6.0% of a conjugated diene monomer, e.g. isoprene, based on the total weight of the two monomers, initially copolymerizing said vinyl aromatic monomer with only a portion of the total amount of conjugated diene monomer and then completing the copolymerization with the remainder thereof, and the polymeric resin obtained by said process.

Abstract: A process for the production of glass-fiber reinforced plastics by partially copolymerizing a mixture of (A) 35-95% by weight methyl methacrylate, (B) 65-5% by weight of a vinyl aromatic hydrocarbon, and 0.2-5.0% by weight, based on the sum of (A) and (B) of a polymerizable compound containing two or more ethylenically unsaturated groups, discontinuing the partial copolymerization before gelation of said mixture has occurred, impregnating glass fibers with the resultant partially polymerized mixture and then curing the impregnated mixture.