NOVEL HIGH HEAT-RESISTANT POLYAMIDEIMIDE RESIN HAVING A CYCLOHEXYLIDENE MOIETY AND THE PREPARATION METHOD THEREOF

摘要

The present invention is an aromatic diamine of the formula containing, more particularly, include trimellitic acid chloride and various structures of an alicyclic alkyl group is substituted in the relates to a novel high-melting-soluble polyamide-imide resin, and a method of producing as well as heat resistance is excellent in solubility of a new type of polyamide-imide resin and a process for producing the same.; Wherein, R is hydrogen, 4-methyl, 4-ethyl, 4-3 car-butyl, 4-amyl, 4-phenyl or 3,3,5-trimethyl. That is, a conventional polyester was used in the preparation of the imide resin aromatic diamine instead of the use of one or two or more diamines selected from a diamine represented by the above formula as a monomer trimellitic acid chloride and reaction by novel poly having an excellent heat resistance and excellent melting properties bar hayeotneun manufacturing the imide resin, such polymers show a glass transition temperature of 300 to 400 ℃, by increasing the volume of the alkyl group the solubility increases, the low water absorption solvents such as organic solvents, especially cyclohexanone and even at room temperature It shows an excellent dissolution characteristics that are easily dissolved.