(JP11106449-A)      A methyl methacrylic resin composition (I) comprises (A) 30-60 wt.% unsaturated monomer mixture comprising (a) an unsaturated monomer having at least two double bonds which can effect radical polymerisation; (B) 40-70 wt.% resin particles made of a polymer of a methyl methacrylic unsaturated monomer comprising (i) 20-100 parts weight (pts. wt.) partially crosslinked resin particles and (ii) 0-80 pts. wt. uncrosslinked resin particles, where the total of (i) and (ii) is 100 pts. wt.; and (C) 0.1-5 wt.%, based on the weight of (A)+(B), of radical polymerisation initiator.    Also claimed are (1) a moulded article or lamp cover obtained by polymerising and curing (I); and (2) production of a moulded article, comprising mixing and aging (I), and polymerising and curing the material.    USE -   In moulded automobile parts, lighting apparatus, construction materials including windows and wall boards, coating materials for bath tubs and washstands, kitchenware, appliance parts and covers, front panels for liquid crystal displays and monitors, lenses, compact discs, and protecting covers for solar batteries and signboards. The moulded material is especially useful for lamp covers (claimed) e.g. tail lamps, head lamps, fog lamps, halogen lamps and sodium lamps.    ADVANTAGE -   The composition is stable, easy to handle and mould, and has good dimensional stability. It provides moulded articles with good crack-free appearance having high transparency and good weather resistance as well as high surface hardness and scratch resistance.    (US6075094-A)      A methyl methacrylic resin composition (I) comprises (A) 30-60 wt.% unsaturated monomer mixture comprising (a) an unsaturated monomer having at least two double bonds which can effect radical polymerisation; (B) 40-70 wt.% resin particles made of a polymer of a methyl methacrylic unsaturated monomer comprising (i) 20-100 parts weight (pts. wt.) partially crosslinked resin particles and (ii) 0-80 pts. wt. uncrosslinked resin particles, where the total of (i) and (ii) is 100 pts. wt.; and (C) 0.1-5 wt.%, based on the weight of (A)+(B), of radical polymerisation initiator.    Also claimed are (1) a moulded article or lamp cover obtained by polymerising and curing (I); and (2) production of a moulded article, comprising mixing and aging (I), and polymerising and curing the material.    USE -   In moulded automobile parts, lighting apparatus, construction materials including windows and wall boards, coating materials for bath tubs and washstands, kitchenware, appliance parts and covers, front panels for liquid crystal displays and monitors, lenses, compact discs, and protecting covers for solar batteries and signboards. The moulded material is especially useful for lamp covers (claimed) e.g. tail lamps, head lamps, fog lamps, halogen lamps and sodium lamps.    ADVANTAGE -   The composition is stable, easy to handle and mould, and has good dimensional stability. It provides moulded articles with good crack-free appearance having high transparency and good weather resistance as well as high surface hardness and scratch resistance.