摘要:
Novel thermosetting compositions, including a polyimide/N-vinylpyrrolidone prepolymer, optionally comprising an unsaturated polyester, and an epoxy resin, are well adapted for the molding of a variety of useful shaped articles.
摘要:
Novel thermosetting compositions, including a polyimide/N-vinylpyrrolidone prepolymer, optionally comprising an unsaturated polyester, and an epoxy resin, are well adapted for the molding of a variety of useful shaped articles.
摘要:
An electro-optical device using a doped semiconductor medium under conditions of controlled excitation energy. The semiconductor medium is a doped binary, ternary or quaternary semiconductor alloy, namely, an III-V semiconductor alloy having at least one element from column III, and at least one element from column V of the Periodic Table, and doped with vanadium, titanium or niobium. Such an electro-optical device may be made into a laser or into a light emitting diode.
摘要:
The present invention relates to a process for producing polyamide articles by rotomolding and to articles manufactured by this process. The process according to the invention includes in particular a step in which a polyamide-based powder is introduced into a rotomolding mold. The articles obtained by rotomolding may be hollow parts without welds, such as, for example, articles selected from the group consisting of containers, vats, flasks, cisterns, cases, boxes, tanks, bumpers, seats and bodywork parts.