Abstract: A method for preparing a flame retardant modified acrylonitrile-based copolymer, includes: prepolymerizing a first composition to obtain a first prepolymer solution including a first prepolymer; prepolymerizing a second composition to obtain a second prepolymer solution including a second prepolymer; and mixing the first and second prepolymer solutions and subjecting a mixture of the first and second prepolymers to polymerization to obtain a flame retardant modified acrylonitrile-based copolymer solution containing a flame retardant modified acrylonitrile-based copolymer.

Abstract: A method for preparing a flame retardant modified acrylonitrile-based copolymer, includes: prepolymerizing a first composition to obtain a first prepolymer solution including a first prepolymer; prepolymerizing a second composition to obtain a second prepolymer solution including a second prepolymer; and mixing the first and second prepolymer solutions and subjecting a mixture of the first and second prepolymers to polymerization to obtain a flame retardant modified acrylonitrile-based copolymer solution containing a flame retardant modified acrylonitrile-based copolymer.

Abstract: A height adjustable lamp containing a height adjustable mechanism, a lamp head, a base and a cable. The mechanism not only can let the height of the lamp be adjustable but also prevent the cable received therein from being damaged by overly twisted. The height adjustable mechanism contains an inner tube, a positioning device, an outer tube, a fastener, and a sleeve. The positioning device is connected to a rear end of the inner tube. The outer tube has an elongated rail therein. The elongated rail is engaged with the positioning device for preventing the inner tube from rotating in the outer tube. The fastener has plural inward claws at a first end thereof, a threaded portion thereon and a second end mounted to a top end of the outer tube. The sleeve embraces the fastener and the top end of the outer tube. The sleeve has a threaded portion therein and an inclined surface situated above the threaded portion of said sleeve. The lamp head is connected to a top end of the inner tube.

Abstract: A multifunction warning device is provided for being used as a flashlight, a warning sign or an illuminating traffic baton. The multifunction warning device mainly contains a base, plural legs, and a rechargeable device. The base has a top portion and a bottom portion having a first electric socket therein. Each of the plural legs is pivotally secured to the base. Each of the plural legs has plural illuminating elements thereon. The plural illuminating elements are electrically connected to the first electric socket. The rechargeable device contains a shell, plural rechargeable batteries, a charging circuit, and a discharging circuit. The shell has a charging connector detachably plugged into the first electric socket and thereby electric power is provided from the rechargeable batteries to the illuminating elements. The plural legs are stretchable to be a support and retractable to be assembled as a baton.

Abstract: A multifunction warning device can be used as a flashlight, a warning sign and an illuminating traffic baton. The multifunction warning device mainly contains: a manual power generator, a lamp, a seat, a storage battery, and plural legs. The lamp is secured and electronically connected to a head end of the manual power generator. The seat is connected the manual power generator. The seat has a socket therein. The storage battery has an automobile charging connector removably attached to the socket of the seat. Each of the plural legs contains: a longitude frame and a light pervious shell. The longitude frame has plural LEDs thereon. The longitude frame is pivotally secured to the seat. The light pervious shell is fastened to the longitude frame. The plural legs can be assembled to a baton body.