Abstract: Synthetic organic particles each constituted of a core made from an organic polymer and a surface layer formed from a methacrylate resin on the surface of the core. In one of the particles, the core is made from a copolymer comprising 80 to 99 weight percent of a lower alkyl acrylate and 1 to 20 weight percent of a polyfunctional vinyl monomer to exhibit rubberlike elasticity, while in another of the particles, the core is made from a copolymer of a reactive benzotriazol compound and a (meth)acrylic monomer to exhibit an ultraviolet absorbing activity. These synthetic organic particles can be suitably added to cosmetics to impart a feeling of creamy softness and an ultraviolet screening power to them.

Abstract: The present invention is concerned with a collector, used for supplying powdered or granular materials such as various kinds of raw materials for plastic to a plastic molding machine, which can automatically switch multi-materials. The collector comprises a separation box connected to a main body of the collector, a rotary valve being pressed to a vacant chamber of the separation box for being mounted thereto such that the rotary valve may be rotatable to and fro, and a separator provided on a bottom of the rotary valve and is constructed such that a rotational displacement of the rotary valve permits a passage for guiding materials to communicate selectively with an inlet of materials and a gas introducing port to execute replacement of materials and compressed gas can be supplied from the gas introducing port, when a coincidence between the gas introducing port and the passage for guiding materials is made.